JP4596355B2

JP4596355B2 - Linear motor

Info

Publication number: JP4596355B2
Application number: JP2001540063A
Authority: JP
Inventors: 透鹿山; 恭祐宮本
Original assignee: Yaskawa Electric Corp
Current assignee: Yaskawa Electric Corp
Priority date: 2000-09-18
Filing date: 2000-09-18
Publication date: 2010-12-08
Anticipated expiration: 2020-09-18
Also published as: JPWO2002023702A1; WO2002023702A1

Description

［技術分野］
本発明は、コギング推力の発生を抑え、電機子の長さを小さくし、しかも、コイル温度検出精度を向上できるリニアモータに関する。
［背景技術］
従来のムービングコイル形のリニアモータにあっては、図３５に示す様に、固定部に設けた界磁永久磁石４１と、この界磁永久磁石４１と対向する櫛歯状の電機子コア４２を備え、電機子コア４２に複数のティース４４を設け、そこに分布巻きにした電機子コイル４３を巻装していた。この電機子コイル４３を巻装する電機子コア４２は、相数をｎ、界磁永久磁石４１の数をｐ、１極あたりに対向するティース４４の数をｑとすれば、電機子コア４２に設けるティース４４の数Ｎは、Ｎ＝ｎ×ｐ×ｑであり、このティース数を推力方向Ｘに等間隔で設けた電機子コア４２に電機子コイル４３の３相巻線Ｕ、Ｖ、Ｗを、少なくとも２以上のティースピッチとなるコイル飛びによって設けていた。
このため、従来のムービングコイル形のリニアモータは、移動する電機子コアの磁気回路がエンドレスになっておらず、両端で開放されているため、電機子推力方向の両端のスロットは、中央部分のスロットと異なり、１個のコイルだけを収納しており、このスロットによって端効果が発生し、界磁磁石の磁極ピッチの中に１周期のコギングトルクＴＣを生じ、推力ムラを発生させていた。
また、コイルの温度管理をするために、コイルを収納したスロット内に温度センサを挿入する場合は、スロットを大きくする必要があり、電機子コアが大きくなり巻線の占積率を低下させる欠点がある。このため、リニアモータではコイルの両端に温度センサを設けるようにしているが、コイル中央部の温度測定ができないので、精度の高い温度検出が得られなかった。
本発明は、上記問題を解決するためになされたものであり、コギング推力の発生を抑え、電機子の推力方向長さを短縮でき、しかもコイル温度検出精度を向上できるリニアモータを提供することを目的とする。
［発明の開示］
上記問題を解決するために、請求項１の本発明は、等ピッチで配列した界磁磁極と、この界磁磁極と対面する電機子とを備え、この電機子は複数の電機子ブロックに分割して推力の方向に配列してあり、各電機子ブロックのブロックコアは、等ピッチで配列された相数の整数倍のティースと前記ティースに集中巻きした電機子コイルとが設けられ、前記電機子ブロック間には、磁極ピッチを電機子ブロック数で除した値の整数倍の電気角に対応する間隙が設けられ、各電機子ブロックの電機子コイルの相互を、電機子ブロック間の間隙に対応する電気角で位相をずらして巻装してなるリニアモータを特徴としている。
また、請求項２の本発明は、請求項１記載のリニアモータにおいて、電機子のブロック数を３の整数倍とし、各電機子ブロック間に磁極ピッチの２／３の寸法の間隙を設け、各電機子ブロックのブロックコアには３×ａ（ａ＝整数）個のティースを等ピッチで設け、電機子ブロック当たりの界磁磁極数を２×ａ（ａ＝整数）として等ピッチで配列し、第１の電機子ブロックのブロックコアのティースの全てにＵ相コイル、Ｖ相コイル、Ｗ相コイルの順序で電機子コイルを巻き込み、第２の電機子ブロックのブロックコアのティースの全てにはＶ相コイル、Ｗ相コイル、Ｕ相コイルの順序で電機子コイルを巻き込み、第３の電機子ブロックのブロックコアのティースの全てにはＷ相コイル、Ｕ相コイル、Ｖ相コイルの順序で電機子コイルを巻き込み、電機子ブロック数が３を超える場合は上記のコイル配列を繰返して行い、各電機子ブロックの各相コイルを３相平衡結線したことを特徴としている。
また、請求項３の本発明は、請求項１記載のリニアモータにおいて、電機子のブロック数を３の整数倍とし、各電機子ブロック間に磁極ピッチの１／３の寸法の間隙を設け、各電機子ブロックのブロックコアには３×ａ（ａ＝整数）個のティースを等ピッチで設け、電機子ブロック当たりの界磁磁極数を２×ａ（ａ＝整数）として等ピッチで配列し、第１の電機子ブロックのブロックコアのティースの全てにＵ相コイル、Ｖ相コイル、Ｗ相コイルの順序で電機子コイルを巻き込み、第２の電機子ブロックのブロックコアのティースの全てには第１の電機子ブロックとは巻き方何を逆にしてＷ相コイル、Ｕ相コイル、Ｖ相コイルの順序で電機子コイルを巻き込み、第３の電機子ブロックのブロックコアのティースの全てにはＶ相コイル、Ｗ相コイル、Ｕ相コイルの順序で電機子コイルを巻き込み、電機子ブロック数が３を超える場合は上記のコイル配列を繰返して行い、各電機子ブロックの各相コイルを３相平衡結線したことを特徴としている。
また、請求項４の本発明は、請求項１記載のリニアモータにおいて、３個の電機子ブロックを用い、各電機子ブロックの推力方向の長さを界磁磁極ピッチの１０倍の長さとし、各電機子ブロックのブロックコアに９個のティースを等ピッチで設け、磁極ピッチの２／３の寸法の間隙を各電機子ブロック間に設けて推力方向に配列し、各電機子ブロックのブロックコアのティースを３個ずつのグループとし、第１の電機子ブロックのブロックコアのティースグループにＵ相コイル、Ｗ相コイル、Ｖ相コイルの順序で電機子コイルを巻き込み、第２の電機子ブロックのブロックコアのティースグループにＶ相コイル、Ｕ相コイル、Ｗ相コイルの順序で電機子コイルを巻き込み、第３の電機子ブロックのブロックコアのティースグループにＷ相コイル、Ｖ相コイル、Ｕ相コイルの順序で電機子コイルを巻き込み、電機子コイルを１２０°の位相差で配列して３相平衡結線したことを特徴としている。
また、請求項５の本発明は、請求項１記載のリニアモータにおいて、３個の電機子ブロックを用い、各電機子ブロックの推力方向の長さを界磁磁極ピッチの１０倍の長さとし、各電機子ブロックのブロックコアに９個のティースを等ピッチで設け、磁極ピッチの１／３の寸法の間隙を各電機子ブロック間に設けて推力方向に配列し、各電機子ブロックのブロックコアのティースを３個ずつのグループとし、第１の電機子ブロックのブロックコアのティースグループにＵ相コイル、Ｗ相コイル、Ｖ相コイルの順序で電機子コイルを巻き込み、第２の電機子ブロッのブロックコアのティースグループに第１の電機子ブロックとは巻き方向を逆にしてＷ相コイル、Ｖ相コイル、Ｕ相コイルの順序で電機子コイルを巻き込み、第３の電機子ブロックのブロックコアのティースグループに第１の電機子ブロックと同じ方向でＶ相コイル、Ｕ相コイル、Ｗ相コイルの順序で電機子コイルを巻き込み、電機子コイルを６０°の位相差で配列して３相平衡結線したことを特徴としている。
また、請求項６の本発明は、請求項１記載のリニアモータにおいて、２個の電機子ブロックを用い、各電機子ブロックの推力方向の長さを界磁磁極ピッチの１０倍の長さとし、各電機子ブロックのブロックコアに９個のティースを等ピッチで設け、磁極ピッチの１／２の寸法の間隙を各電機子ブロック間に設けて推力方向に配列し、各電機子ブロックのブロックコアのティースを３個ずつのグループとし、第１の電機子ブロックのブロックコアのティースグループにＵ相コイル、Ｗ相コイル、Ｖ相コイルの順序で電機子コイルを巻き込み、第２の電機子ブロックのブロックコアのティースグループの第１、第２のティースにはそれぞれＷ相コイル、第３、第４、第５のティースにはぞぞれＶ相コイル、第６、第７、第８のティースにはそれぞれＵ相コイル、第９のティースにはＷ相コイルの順序で電機子コイルを巻き込み、電機子コイルを９０°の位相差で配列して３相平衡結線したしたことを特徴としている。
また、請求項７の本発明は、請求項１記載のリニアモータにおいて、２個の電機子ブロックを用い、各電機子ブロックの推力方向の長さを界磁磁極ピッチの１０倍の長さとし、各電機子ブロックのブロックコアに９個のティースを等ピッチで設け、磁極ピッチの１／２の寸法の間隙を各電機子ブロック間に設けて推力方向に配列し、各電機子ブロックのブロックコアのティースを３個ずつのグループとし、第１の電機子ブロックのブロックコアのティースグループにＵ相コイル、Ｗ相コイル、Ｖ相コイルの順序で電機子コイルを巻き込み、第２の電機子ブロックのブロックコアのティースグループにＶ相コイル、Ｕ相コイル、Ｗ相コイルの順序で電機子コイルを巻き込み、電機子コイルを９０°の位相差で配列して３相平衡結線したことを特徴としている。
また、請求項８の本発明は、請求項１記載のリニアモータにおいて、２×ｃ（ｃ＝整数）個の電機子ブロックを用い、各電機子ブロックの推力方向の長さを界磁磁極ピッチの１０倍の長さとし、各電機子ブロックのブロックコアに１２個のティースを等ピッチで設け、磁極ピッチの１／２の寸法の間隙を各電機子ブロック間に設けて推力方向に配列し、各電機子ブロックのブロックコアのティースを３個ずつのグループとし、第１の電機子ブロックのブロックコアのティースグループに正方向巻きＵ相コイル、正方向巻きＶ相コイル、逆方向巻きｕ相コイル、逆方向巻きｖ相コイルの順序で電機子コイルを巻き込み、第２の電機子ブロックのブロックコアのティースグループに正方向巻きＶ相コイル、逆方向巻きｕ相コイル、逆方向巻きｖ相コイル、正方向巻きＵ相コイルの順序で電機子コイルを巻き込み、電機子ブロック数が２を超える場合は上記を繰り返して電機子コイルを巻き込み２相結線としたことを特徴としている。
また、請求項９の本発明は、請求項１記載のリニアモータにおいて、２×ｄ（ｄ＝整数）個の電機子ブロックを用い、各電機子ブロックの推力方向の長さを界磁磁極ピッチの１０倍の長さとし、各電機子ブロックのブロックコアに１２個のティースを等ピッチで設け、磁極ピッチの１／２の寸法の間隙を各電機子ブロック間に設けて推力方向に配列し、各電機子ブロックのブロックコアのティースを２個ずつのグループとし、第１の電機子ブロックのブロックコアのティースグループに正方向巻きＵ相コイル、逆方向巻きｖ相コイル、正方向巻きＷ相コイル、逆方向巻きｕ相コイル、正方向巻きＶ相コイル、逆方向巻きｗ相コイルの順序で電機子コイルを巻き込み、第２の電機子ブロックのブロックコアのティースグループに正方向巻きＶ相コイル、正方向巻きＷ相コイル、逆方向巻きｕ相コイル、正方向巻きＶ相コイル、逆方向巻きｗ相コイル、正方向巻きＵ相コイル、逆方向巻きｖ相コイルの順序で電機子コイルを巻き込み、電機子ブロック数が２を超える場合は上記を繰り返して電機子コイルを巻き込み３相結線としたことを特徴としている。
また、請求項１０の本発明は、請求項１記載のリニアモータにおいて、３×ｅ（ｅ＝整数）個の電機子ブロックを用い、各電機子ブロックの推力方向の長さを界磁磁極ピッチの１０倍の長さとし、各電機子ブロックのブロックコアに１２個のティースを等ピッチで設け、磁極ピッチの２／３の寸法の間隙を各電機子ブロック間に設けて推力方向に配列し、各電機子ブロックのブロックコアのティースを３個ずつのグループとし、第１の電機子ブロックのブロックコアのティースグループに正方向巻きＵ相コイル、正方向巻きＶ相コイル、逆方向巻きｕ相コイル、逆方向巻きｖ相コイルの順序で電機子コイルを巻き込み、第２の電機子ブロックのブロックコアのティースグループに逆方向巻きｕ相コイル、逆方向巻きｖ相コイル、正方向巻きＵ相コイル、逆方向巻きｖ相コイル、逆方向巻きｕ相コイルの順序で電機子コイルを巻き込み、第３の電機子ブロックのブロックコアのティースグループに逆方向巻きｖ相コイル、正方向巻きＵ相コイル、逆方向巻きｖ相コイル、正方向巻きＵ相コイル、正方向巻きＶ相コイルの順序で電機子コイルを巻き込み、電機子ブロック数が３を超える場合は上記を繰り返して電機子コイルを巻き込み２相結線としたことを特徴としている。
また、請求項１１の本発明は、請求項１記載のリニアモータにおいて、３×ｆ（ｆ＝整数）個の電機子ブロックを用い、各電機子ブロックの推力方向の長さを界磁磁極ピッチの１０倍の長さとし、各電機子ブロックのブロックコアに１２個のティースを等ピッチで設け、磁極ピッチの２／３の寸法の間隙を各電機子ブロック間に設けて推力方向に配列し、各電機子ブロックのブロックコアのティースを２個ずつのグループとし、第１の電機子ブロックのブロックコアのティースグループに正方向巻きＵ相コイル、逆方向巻きｖ相コイル、正方向巻きＷ相コイル、逆方向巻きｕ相コイル、正方向巻きＶ相コイル、逆方向巻きｗ相コイルの順序で電機子コイルを巻き込み、第２の電機子ブロックのブロックコアのティースグループに正方向巻きＶ相コイル、逆方向巻きｗ相コイル、正方向巻きＵ相コイル、逆方向巻きｖ相コイル、正方向巻きＷ相コイル、逆方向巻きｕ相コイルの順序で電機子コイルを巻き込み、第３の電機子ブロックのブロックコアのティースグループに正方向巻きＷ相コイル、逆方向巻きｕ相コイル、正方向巻きＶ相コイル、逆方向巻きｗ相コイル、正方向巻きＵ相コイル、逆方向巻きｖ相コイルの順序で電機子コイルを巻き込み、電機子ブロック数が３を超える場合は上記を繰り返して電機子コイルを巻き込み３相結線としたことを特徴としている。
また、請求項１２の本発明は、請求項１記載のリニアモータにおいて、３×ｇ（ｇ＝整数）個の電機子ブロックを用い、各電機子ブロックの推力方向の長さを界磁磁極ピッチの１０倍の長さとし、各電機子ブロックのブロックコアに１２個のティースを等ピッチで設け、磁極ピッチの１／３の寸法の間隙を各電機子ブロック間に設けて推力方向に配列し、各電機子ブロックのブロックコアのティースを３個ずつのグループとし、第１の電機子ブロックのブロックコアのティースグループに正方向巻きＵ相コイル、正方向巻きＶ相コイル、逆方向巻きｕ相コイル、逆方向巻きｖ相コイルの順序で電機子コイルを巻き込み、第２の電機子ブロックのブロックコアのティースグループに正方向巻きＶ相コイル、正方向巻きＵ相コイル、正方向巻きＶ相コイル、逆方向巻きｕ相コイル、逆方向巻きｖ相コイルの順序で電機子コイルを巻き込み、第３の電機子ブロックのブロックコアのティースグループに逆方向巻きｕ相コイル、逆方向巻きｖ相コイル、正方向巻きＵ相コイル、正方向巻きＶ相コイル、逆方向巻きｕ相コイルの順序で電機子コイルを巻き込み、電機子ブロック数が３を超える場合は上記を繰り返して電機子コイルを巻き込み２相結線としたことを特徴としている。
また、請求項１３の本発明は、請求項１記載のリニアモータにおいて、３×ｈ（ｈ＝整数）個の電機子ブロックを用い、各電機子ブロックの推力方向の長さを界磁磁極ピッチの１０倍の長さとし、各電機子ブロックのブロックコアに１２個のティースを等ピッチで設け、磁極ピッチの１／３の寸法の間隙を各電機子ブロック間に設けて推力方向に配列し、各電機子ブロックのブロックコアのティースを２個ずつのグループとし、第１の電機子ブロックのブロックコアのティースグループに正方向巻きＵ相コイル、逆方向巻きｖ相コイル、正方向巻きＷ相コイル、逆方向巻きｕ相コイル、正方向巻きＶ相コイル、逆方向巻きｗ相コイルの順序で電機子コイルを巻き込み、第２の電機子ブロックのブロックコアのティースグループに逆方向巻きｗ相コイル、正方向巻きＵ相コイル、逆方向巻きｖ相コイル、正方向巻きＷ相コイル、逆方向巻きｕ相コイル、正方向巻きＶ相コイルの順序で電機子コイルを巻き込み、第３の電機子ブロックのブロックコアのティースグループに正方向巻きＶ相コイル、逆方向巻きｗ相コイル、正方向巻きＵ相コイル、逆方向巻きｖ相コイル、正方向巻きＷ相コイル、逆方向巻きｕ相コイルの順序で電機子コイルを巻き込み、電機子ブロック数が３を超える場合は上記を繰り返して電機子コイルを巻き込み３相結線としたことを特徴としている。
また、請求項１４の本発明は、請求項１〜１３までの何れか１項に記載のリニアモータにおいて、前記電機子ブロックを構成するブロックコアは、片側に形成した係合突起と反対側にこの係合突起に嵌合するように形成した係合部を有してなる継鉄部と、各電機子コイルを巻回するティースとからなるコアセグメントで構成され、このコアセグメントを順次結合してなるブロックコア列の長手方向を両側から挟みこむようにそれぞれ界磁磁極を配列したことを特徴としている。
また、請求項１５の本発明は、請求項１〜１４までの何れか１項に記載のリニアモータにおいて、前記電機子ブロックを構成するブロックコアは、下端部がティース部を形成して上端部が継鉄部を形成するＴ字状のコアセグメントの複数を継鉄部で相互に連接させたブロックコアを備えることを特徴としている。
また、請求項１６の本発明は、請求項１〜１５までの何れか１項に記載のリニアモータにおいて、電機子ブロック間の間隙において、ブロックコアの継鉄部間を磁性体製の間隔片で支持し、この間隔片上の空間に温度センサをモールド支持したことを特徴としている。
また、請求項１７の本発明は、請求項１〜１６までの何れか１項に記載のリニアモータにおいて、電機子ブロックの推力方向と直交する方向に、電機子ブロックを所定の角度だけ傾斜させて配置することを特徴としている。
また、請求項１８の本発明は、請求項１〜１７までの何れか１項に記載のリニアモータにおいて、３個の電機子ブロックを用い，電機子ブロックの積厚幅をＷ，磁極ピッチをＰｍとしたとき，電機子ブロックの傾斜角度θを
θ＝ｓｉｎ^−１（Ｐｍ／３Ｗ）
とすることを特徴としている。
また、請求項１９の本発明は、請求項１〜１７までの何れか１項に記載のリニアモータにおいて、２個の電機子ブロックを用い，電機子ブロックの積厚幅をＷ，磁極ピッチをＰｍとしたとき，電機子ブロックの傾斜角度θを
θ＝ｓｉｎ^−１（Ｐｍ／２Ｗ）
とすることを特徴としている。
［発明を実施するための最良の形態］
リニアモータは、界磁磁極と、この界磁磁極と対面する電機子とを備え、その何れか一方を固定子、他方を可動子として用いる。本発明によれば、リニアモータに発生するコギング推力を抑えるため、電機子を複数に分割して、分割した電機子ブロック間に位相差を持たせて、発生したコギング推力を電機子ブロック間で相殺させる。このため、電機子コイルを集中巻とし、磁極ピッチを電機子ブロック数で除した値の整数倍の電気角に対応する間隙を電機子ブロック間に設け、電機子コイルの相互を電機子ブロック間の間隙に対応する電気角で位相をずらして配置する。
次に、図に基づいて、本発明の実施の形態を説明する。
［第１の実施の形態］
図１は、第１の実施の形態を示すもので、電機子ブロック数３、各電機子ブロック当たりのティース数９、電機子ブロック当たりの界磁磁極数６の場合を示している。界磁磁極１は永久磁石からなり、固定子２側に等ピッチで設けられている。固定子２の上には、可動子を形成する電機子３が設けられている。電機子３は、第１の電機子ブロック４と第２の電機子ブロック５と第３の電機子ブロック６とを備え、電機子ブロック間には間隔片７をもうけて間隙を維持している。この場合の間隙寸法は、磁極ピッチＰｍの２／３である。各電機子ブロック４、５、６と間隔片７とは推力方向に配列されて固定手段８によって一体的に保持されている。電機子ブロック４、５、６のブロックコア９には、それぞれ等しいティースピッチＰｔで配列した９個のティース１０が設けられている。各ティース１０には、集中巻の電機子コイル１１が巻き込まれる。界磁磁極１は、永久磁石式であっても、巻線励磁式であっても良く、電機子３の推力方向の全長にリニアモータストロークを加えた長さの固定子２の全長にわたり等ピッチＰｍで配列される。磁極ピッチＰｍは、電気角１８０°であるので、間隙寸法Ｐｍ×２／３は電気角で１２０°となる。そこでティースピッチＰｔを電気角１２０°とする。そのため、各電機子ブロック４、５、６の電機子コイル配置は図２（ａ）に示す様になる。即ち、第１の電機子ブロック４では、Ｕ相コイル、Ｖ相コイル、Ｗ相コイルの順序で電機子コイル１１を巻き込み、第２の電機子ブロック５では、Ｖ相コイル、Ｗ相コイル、Ｕ相コイルの順序で巻き込み、第３の電機子ブロック６では、Ｗ相コイル、Ｕ相コイル、Ｖ相コイルの順序で電機子コイル１１を巻き込み、電機子ブロック数が３を超えて、６ブロック、９ブロック、１２ブロック等となった場合は、上記の配列を繰り返して行い各相コイルを３相平衡結線する。このように電機子コイル１１を設けると、電機子３の推力方向のコイル配置は図２（ｂ）のごとくなり、第１の電機子ブロック４の最後のコイルＷ相の次には電気角１２０°の間隔片７が有ってＵ相部分を占めるので、第２の電機子ブロック５の電機子コイル１１の巻き始めはＶ相となる。同様に、第３の電機子ブロック６の電機子コイル１１の巻き始めはＷ相になる。
図３は、上記の構成によって生ずるコギング推力の状況を示す。図において、ＴＣ１は、第１の電機子ブロック４によって生ずるコギング推力、ＴＣ２は第２の電機子ブロック５によって生ずるコギング推力、ＴＣ３は、第３の電機子ブロック６によって生ずるコギング推力であって、三者の合成によってコギング推力が相殺されることが判る。
［第２の実施の形態］
図４は、第２の実施の形態を示すもので、電機子ブロック数３、各電機子ブロック当たりのティース数９、電機子ブロック当たりの界磁磁極数６の場合を示している。界磁磁極１は永久磁石からなり、固定子２側に等ピッチで設けられている。固定子２の上には、可動子を形成する電機子３が設けられている。電機子３は、第１の電機子ブロック４と第２の電機子ブロック５と第３の電機子ブロック６とを備え、電機子ブロック間には間隔片７をもうけて間隙を維持している。この場合の間隙寸法は、磁極ピッチＰｍの１／３である。各電機子ブロック４、５、６と間隔片７とは推力方向に配列されて固定手段８によって一体的に保持されている。電機子ブロック４、５、６のブロックコア９には、それぞれ等しいティースピッチＰｔで配列した９個のティース１０が設けられている。各ティース１０には、集中巻の電機子コイル１１が巻き込まれる。界磁磁極１は、永久磁石式であっても、巻線励磁式であっても良く、電機子３の推力方向の全長にリニアモータストロークを加えた長さの固定子２の全長にわたり等ピッチＰｍで配列される。磁極ピッチＰｍは、電気角１８０°であるので、間隙寸法Ｐｍ×１／３は電気角で６０°となる。また、ティースピッチＰｔを電気角１２０°とする。そのため、各電機子ブロック４、５、６の電機子コイル配置は図５（ａ）に示す様になる。即ち、第１の電機子ブロック４では、Ｕ相コイル、Ｖ相コイル、Ｗ相コイルの順序で電機子コイル１１を巻き込み、第２の電機子ブロック５では、第１の電機子ブロックの巻き方向とは逆向きにＷ相コイル、Ｕ相コイル、Ｖ相コイルの順序で巻き込み、第３の電機子ブロック６では、Ｖ相コイル、Ｗ相コイル、Ｕ相コイルの順序で電機子コイル１１を巻き込み、電機子ブロック数が３を超えて、６ブロック、９ブロック、１２ブロック等となった場合は、上記の配列を繰り返して行い各相コイルを３相平衡結線する。このように電機子コイル１１を設けると、電機子３の推力方向のコイル配置は図５（ｂ）のごとくなり、第１の電機子ブロック４の最後のコイルＷ相の次には電気角６０°の間隔片７が有るので、第２の電機子ブロック５の電機子コイル１１の巻き始めは、第１の電機子ブロックの巻き方向とは逆向きのＷ相となる。同様に、第３の電機子ブロック６の電機子コイル１１の巻き始めはＶ相になる。
図６は、上記の構成によって生ずるコギング推力の状況を示す。図において、ＴＣ１は、第１の電機子ブロック４によって生ずるコギング推力、ＴＣ２は第２の電機子ブロック５によって生ずるコギング推力、ＴＣ３は、第３の電機子ブロック６によって生ずるコギング推力であって、三者の合成によってコギング推力が相殺されることが判る。
［第３の実施の形態］
図７は、第３の実施の形態を示すリニアモータの縦断面図である。この実施の形態では第１の実施の形態と同様に、電機子３は、ブロックコア９に９個のティース１０を備える第１、第２、第３の電機子ブロック４、５、６を有し、電機子ブロック間には磁極ピッチＰｍの２／３（電気角で１２０°）の寸法の間隔片７を配して電機子ブロックを離間させて固定手段８によって一体に保持している。しかしながら、固定子２に設けた界磁磁極１は各電機子ブロック当たり１０個としている。そして、図８（ａ）に示す様に、３個のティースをグループとして、第１の電機子ブロック４には、電気子コイルに１２０°の位相ずれを持たせるため、Ｕ相コイル、Ｗ相コイル、Ｖ相コイルの順序で電機子コイルを巻き込み、第２の電機子ブロック５には、Ｖ相コイル、Ｕ相コイル、Ｗ相コイルの順序で、第３の電機子ブロック６には、Ｗ相コイル、Ｖ相コイル、Ｕ相コイルの順序で電機子コイル１１を巻き込む。この際の推力方向のコイルと間隔片７の配置は図８（ｂ）に示す通りになる。この実施の形態の場合も、第１、第２、第３の電機子ブロックの端効果によって生じるコギング推力ＴＣ１、ＴＣ２、ＴＣ３は、図９に示す通り１２０°の位相差を生じ、それらの和は零になり、打ち消される。
［第４の実施の形態］
図１０は、第４の実施の形態によるリニアモータの縦断面図である。この実施の形態の場合、固定子２に設けた界磁磁極１の数が、電機子ブロック当たり１０個である点、並びに、電機子３のブロックコア９のティース１０の数が９個である点が上記第３の実施の形態と同じである。異なる点は、第１、第２、第３の電機子ブロック４、５、６間の間隔片１２の寸法を磁極ピッチＰｍの１／３とした点と、電機子３の固定手段１３の推力方向の寸法が短縮された点である。つまり、各電機子ブロックを電気角で６０°ずらした例が示されている。
このため、電機子コイル配置は、図１１（ａ）に示すように、第１の電機子ブロック４では、Ｕ相コイル、Ｗ相コイル、Ｖ相コイルの順序で端から順次巻き込み、第２の電機子ブロック５では、第１の電機子ブロック４と電気角で６０°の位相をずらせるために、コイルの巻き方向を逆にしたＷ相コイル、Ｖ相コイル、Ｕ相コイルを順次巻き込み、第３の電機子ブロック６では、第２の電機子ブロック５と６０°の位相差とするため、第１の電機子ブロック４のコイルと同一巻き方向のＶ相コイル、Ｕ相コイル、Ｗ相コイルの順序で巻き込む。かくして巻き込まれた電機子コイルの推力方向の配列が図１１（ｂ）に示されている。この電機子コイル配列によって、第１の電機子ブロック４に生ずるコギング推力ＴＣ１、第２の電機子ブロック５に生ずるコギング推力ＴＣ２、および第３の電機子ブロック６に生ずるコギング推力ＴＣ３は、それぞれ図１２に示すとおり６０°の位相差となり、その総和は零となり、コギング推力は打ち消される。
［第５の実施の形態］
図１３は、第５の実施の形態によるリニアモータの縦断面図である。この実施の形態にあっては、固定子２に設けた界磁磁極１の寸法配列並びに、ティース１０の数を含めたブロックコア９の寸法構造が上記第４の実施の形態と同一であるが、電機子３が第１の電機子ブロック４と第２の電機子ブロック５の二分割構造となった点、電機子ブロック間の間隙即ち間隔片１４の幅寸法が磁極ピッチＰｍの１／２となった点、並びに固定手段１５が１電機子ブロック分短縮された点が異なる。
そこで、各電機子ブロックには、図１４（ａ）に示す電機子コイル配置が採用される。即ち、第１の電機子ブロック４には、９個のティース１０を３個のグループに分けて、Ｕ相コイル、Ｗ相コイル、Ｖ相コイルの順序で電機子コイルを巻き込み、第２の電機子ブロック５では、第１、第２のティースにはそれぞれＷ相コイル、第３、第４、第５のティースにはそれぞれＶ相コイル、第６、第７、第８のティースにはそれぞれＵ相コイル、第９のティースにはＷ相コイルを巻き込む。この場合の電機子コイルと間隔片１４の推力方向の配列が図１４（ｂ）に示されている。この構成により、図１５に示す様に、第１の電機子ブロック４によるコギング推力ＴＣ１と、第２の電機子ブロック５によるコギング推力ＴＣ２とは、相互に９０°の位相差となり、その和は零となり、打ち消される。
また、図１６は本実施の形態による循環電流を説明するベクトル図である。
第１の電機子ブロック４と第２の電機子ブロックの同相のコイルを直列に接続することにより、図１６に示されるように、両電機子ブロックに生ずる起磁力ベクトルの位相がベクトル合成されて、循環電流をなくすことができる。
［第６の実施の形態］
図１７は、第６の実施の形態を示す。この場合、第５の実施の形態の電機子コイル部分のみを変更した例が示されている。即ち、第１の電機子ブロック４においては、３個ずつのティースグループにＵ相コイル、Ｗ相コイル、Ｖ相コイルの順序で電機子コイルを巻き込み、第２の電機子ブロック５には、Ｖ相コイル、Ｕ相コイル、Ｗ相コイルを巻き込むことにより、９０°の位相差で３相平衡結線することができる。この場合の、電機子コイルと間隔片１４の推力方向配列を図１７（ｂ）に示す。この実施の形態の場合も、図１５に示す様に９０°位相の異なる第１の電機子ブロックのコギング推力ＴＣ１と第２の電機子ブロックのコギング推力ＴＣ２とは相殺される。また、第５の実施の形態同様に、起磁力ベクトルの合成により、循環電流を無くすることができる。
［第７の実施の形態］
図１８は、第７の実施の形態を示す。この実施の形態の場合、図１８（ａ）に示す通り、電機子３の分割数は２であり、第１の電機子ブロック１６と第２の電機子ブロック１７のブロックコア１９には１２個のティース２０が設けられ、ティースピッチＰｔは１５０°に設定される。両電機子ブロック１６、１７間には磁極ピッチＰｍの１／２の間隙が設けられ、そこに間隔片２１を設けて、固定手段２２によって一体に保持されている。
固定子２に配列される界磁磁極１は、電機子ブロック当たり１０個設けられる。即ち、電機子ブロック１６、１７の推力方向の長さは磁極ピッチＰｍの１０倍の長さとなる。ここで、第１の電機子ブロック１６に設けられる電機子コイル２３は、図１９に示す様に、３個のティースのグループ毎に正方向巻きＵ相コイル、正方向巻きＶ相コイル、逆方向巻きｕ相コイル、逆方向巻きｖ相コイルの順序で巻き込まれる。第２の電機子ブロック１７には図１９に示す様に、正方向巻きＶ相コイル、逆方向巻きｕ相コイル、逆方向巻きｖ相コイル、正方向巻きＵ相コイルが巻き込まれ、両電機子ブロックの電機子コイルが２相結線される。この場合の推力方向の電機子コイル配置は、図１８（ｂ）の様になる。その結果、両電機子ブロックの位相差は９０°となり、図１５に示す場合と同様に、コギング推力は打ち消されて零となる。
［第８の実施の形態］
次に、第８の実施の形態について説明する。第８の実施の形態は、第７の実施の形態の電機子ブロックに３相の電機子コイルを施したものである。
この場合、各電機子ブロックのティースを２個ずつのグループとし、図２０に示す様に、第１の電機子ブロック１６には、正方向巻きＵ相コイル、逆方向巻きｖ相コイル、正方向巻きＷ相コイル、逆方向巻きｕ相コイル、正方向巻きＶ相コイル、逆方向巻きｗ相コイルの順序で電機子コイルを巻き込み、第２の電機子ブロック１７には、正方向巻きＶ相コイル、正方向巻きＷ相コイル、逆方向巻きｕ相コイル、正方向巻きＶ相コイル、逆方向巻きｗ相コイル、正方向巻きＵ相コイル、逆方向巻きｖ相コイルの順序で電機子コイルを巻き込み３相結線とする。この場合の電機子コイルの推力方向配列が図１８（ｃ）に示されている。この実施の形態の場合も電機子ブロック間の位相差は９０°であるので、コギング推力は、図１５に示す場合と同様に零となる。
［第９の実施の形態］
図２１（ａ）は、第９の実施の形態によるリニアモータの縦断面図である。
この実施の形態の場合、固定子２に設けた界磁磁極１の数は電機子ブロック当たり１０個、電機子３の分割数は３で、第１、第２、第３の電機子ブロック１６、１７、１８の各ブロックコア１９は１２個のティース（ティースピッチＰｔは電気角で１５０°）を持っている。そして、電機子ブロック間には磁極ピッチＰｍの２／３の寸法の間隔片２４を間挿して固定手段２５によって三組の電機子ブロックを一体保持している。この実施の形態では、図２２に示す様に３個のティース２０をグループとして、正方向巻きＵ相コイル、正方向巻きＶ相コイル、逆方向巻きｕ相コイル、逆方向巻きｖ相コイルの順序で電機子コイルを巻き込み、第２の電機子ブロックのブロックコアのティースグループに逆方向巻きｕ相コイル、逆方向巻きｖ相コイル、正方向巻きＵ相コイル、逆方向巻きｖ相コイル、逆方向巻きｕ相コイルの順序で電機子コイルを巻き込み、第３の電機子ブロックのブロックコアのティースグループに逆方向巻きｖ相コイル、正方向巻きＵ相コイル、逆方向巻きｖ相コイル、正方向巻きＵ相コイル、正方向巻きＶ相コイルの順序で電機子コイルを巻き込み２相結線とする。この電機子コイルの推力方向の配列が図２１（ｂ）に示されている。この実施の形態の電機子ブロック間の位相差は１２０°であり、図９に示す場合と同様に、第１、第２、第３の電機子ブロックによるコギング推力ＴＣ１、ＴＣ２、ＴＣ３の和は零となり、打ち消される。
［第１０の実施の形態］
次に、第９の実施の形態の電機子３を用いて３相式とした第１０の実施の形態について説明する。
図２３に示す様に、ティース２個をグループとし、第１の電機子ブロックのブロックコアのティースグループに正方向巻きＵ相コイル、逆方向巻きｖ相コイル、正方向巻きＷ相コイル、逆方向巻きｕ相コイル、正方向巻きＶ相コイル、逆方向巻きｗ相コイルの順序で電機子コイルを巻き込み、第２の電機子ブロックのブロックコアのティースグループに正方向巻きＶ相コイル、逆方向巻きｗ相コイル、正方向巻きＵ相コイル、逆方向巻きｖ相コイル、正方向巻きＷ相コイル、逆方向巻きｕ相コイルの順序で電機子コイルを巻き込み、第３の電機子ブロックのブロックコアのティースグループに正方向巻きＷ相コイル、逆方向巻きｕ相コイル、正方向巻きＶ相コイル、逆方向巻きｗ相コイル、正方向巻きＵ相コイル、逆方向巻きｖ相コイルの順序で電機子コイルを巻き込み３相結線とする。この実施の形態の場合も、位相差が１２０°で、図９に示すと同様に、コギング推力は零となる。
［第１１の実施の形態］
図２４（ａ）は、第１１の実施の形態によるリニアモータの縦断面図である。この実施の形態は、間隔片２６、固定手段２７並びに電機子コイル配置以外は、第９、第１０の実施の形態と同一である。即ち、第１、第２、第３の電機子ブロック１６、１７、１８間に設けられる間隔片２６は、磁極ピッチＰｍの１／３（電気角で６０°）であり、電機子ブロック１６、１７、１８と間隔片２６とは、固定手段２７によって一体に保持される。電機子コイル２３は、図２５に示す様に、ティース３個をグループとして設けられ、第１の電機子ブロックのブロックコアのティースグループに正方向巻きＵ相コイル、正方向巻きＶ相コイル、逆方向巻きｕ相コイル、逆方向巻きｖ相コイルの順序で電機子コイルを巻き込み、第２の電機子ブロックのブロックコアのティースグループに正方向巻きＶ相コイル、正方向巻きＵ相コイル、正方向巻きＶ相コイル、逆方向巻きｕ相コイル、逆方向巻きｖ相コイルの順序で電機子コイルを巻き込み、第３の電機子ブロックのブロックコアのティースグループに逆方向巻きｕ相コイル、逆方向巻きｖ相コイル、正方向巻きＵ相コイル、正方向巻きＶ相コイル、逆方向巻きｕ相コイルの順序で電機子コイルを巻き込み２相結線する。この電機子コイルの推力方向配列が図２４（ｂ）に示されている。この構成によって、図１２に示すごとくしてコギング推力は打ち消されて零になる。
［第１２の実施の形態］
第１２の実施の形態は、第１１の実施の形態の電機子コイルを、３相結線としたものである。この場合、２個のティースをグループとして、図２６に示す様に、第１の電機子ブロックのブロックコアのティースグループに正方向巻きＵ相コイル、逆方向巻きｖ相コイル、正方向巻きＷ相コイル、逆方向巻きｕ相コイル、正方向巻きＶ相コイル、逆方向巻きｗ相コイルの順序で電機子コイルを巻き込み、第２の電機子ブロックのブロックコアのティースグループに逆方向巻きｗ相コイル、正方向巻きＵ相コイル、逆方向巻きｖ相コイル、正方向巻きＷ相コイル、逆方向巻きｕ相コイル、正方向巻きＶ相コイルの順序で電機子コイルを巻き込み、第３の電機子ブロックのブロックコアのティースグループに正方向巻きＶ相コイル、逆方向巻きｗ相コイル、正方向巻きＵ相コイル、逆方向巻きｖ相コイル、正方向巻きＷ相コイル、逆方向巻きｕ相コイルの順序で電機子コイルを巻き込み３相結線する。この実施の形態の場合の推力方向の電機子コイル配列は、図２４（ｃ）に示されている。また、この実施の形態の電機子ブロック間の位相差は６０°であり、図１２の場合と同様に、コギング推力は零となる。
図２７はリニアモータの構造例を示すものであって、（ａ）は一部を破断したリニアモータの上面から見た平面図、（ｂ）はリニアモータの推力方向Ａと直角な面の縦断面図である。電機子ブロックを構成するブロックコア２８は、片側に係合突起２８ｂを形成し、反対側にこの係合突起２８ｂにかみあう係合部２８ｃを形成した継鉄部２８ａを備えており、継鉄部２８ａを順次嵌合連結している。また、ティース２８ｄには、電機子コイル３１を整列巻きにして収納されている。さらに、電機子ブロック２８はボルト２９ａを介してテーブル２９に保持されている。固定子３２に保持された界磁磁極３３はブロックコア列の長手方向に向かって両側の空隙を介して挟み込むように設けられている。３０は電機子コイル３１を冷却する冷却用の冷媒通路である。
図２８は、ブロックコアの形成例を示すもので、下端がティース部３４を形成し、上端部が継鉄部３５を形成するＴ字状のコアセグメント３６の複数を、継鉄部３５に設けた係合部３７に係合突起３８を嵌め合わせて相互に連接して、電機子コイル３９を配列可能とした例を示す。
図２９は、図７に示す実施の形態において、第１、第２、第３の電機子ブロック間に設けた間隔片７の上部空間に温度センサ４０を配置し、これを樹脂モールド４０ａで隣接する電機子コイルに接触保持させたものである。この様にすることにより、電機子コイルの内部温度を検出できる。
［第１３の実施の形態］
図３０は第１３の実施の形態によるリニアモータの上面図であり，電機子ブロック４，５，６の傾斜を示したものである。なお、図では説明を容易にするため電機子ブロック４，５，６の固定手段８を取り除いて示しており、電機子ブロック４，５，６の下面は界磁磁極１と平行に配置されている。電機子の基本構成は第１の実施の形態と同じである。側断面図は，その中央において図１と同じである。
第１の実施の形態と異なる点は，電機子ブロック４，５，６の推力方向と直交する方向に対して、所定の角度θだけ電機子ブロック４，５，６が傾斜して配置されていることである。それぞれの傾斜角θは，電機子ブロックの積厚幅をＷ，磁極ピッチをＰｍとすれば，
θ＝ｓｉｎ^−１（Ｐｍ／３Ｗ）
に設定されている。つまり，電気角６０度（機械的寸法Ｐｍ／３）のスキューとなるように，傾斜されている。
以下，本実施の形態における効果を第１の実施の形態と比較して示す。
図３１は，第１の実施の形態によって生じるコギング推力の状況を示すものであり，高次のコギング推力成分も含めたものである。一般にコギング推力は，１次（電気角１８０度）の他，２次と３次成分も大きく含まれている。図において，ＴＣ１は電機子ブロック４によって生じるコギング推力，ＴＣ２は電機子ブロック５によって生じるコギング推力，ＴＣ３は電機子ブロック６によって生じるコギング推力である。三者の合成によるコギング推力は，１次と２次成分が相殺され，３次成分が重畳されたものである。
図３２は，本実施の形態によって生じるコギング推力の状況を示すものであり，高次のコギング推力成分も含めたものである。本実施の形態は，電気角６０度のスキューを施しているため，ＴＣ１，ＴＣ２，ＴＣ３には，３次成分が含まれていない。従って，三者の合成によるコギング推力は，第１の実施の形態よりもさらに低減することができる。
また，スキュー効果を得るため，従来，多数の永久磁石を斜めに貼り合わせたり，電機子ブロックのコアを斜めに積層したりしていたが，いずれも組み立てに手間が掛かっていた。本実施の形態により，予め構成した電機子ブロックを傾斜して配置するだけの簡単な可動子構造によって実現できる。
［第１４の実施の形態］
図３３は，第１４の実施の形態によるリニアモータの上面図であり，電機子ブロック４，９の傾斜を示したものである。なお、図では説明を容易にするため電機子ブロック４，９の固定手段８を取り除いて示しており、電機子ブロック４，９の下面は界磁磁極１と平行に配置されている。電機子の基本構成は第５の実施の形態と同じである。側断面図は，その中央において図１３と同じである。
第５の実施に形態と異なる点は，電機子ブロック４，９の推力方向と直交する方向に対して、所定の角度θだけ電機子ブロック４，９が傾斜して配置されていることである。それぞれの傾斜角θは，電機子ブロックの積厚幅をＷ，磁極ピッチをＰｍとすれば，
θ＝ｓｉｎ^−１（Ｐｍ／２Ｗ）
に設定されている。つまり，電気角９０度（機械的寸法Ｐｍ／２）のスキューとなるように，傾斜されている。
以下，本実施の形態における効果を第５の実施の形態と比較して示す。
第５の実施の形態によって生じるコギング推力は，１次の他，２次と３次成分も含まれている。二者の合成によるコギング推力は，１，３次が相殺され，２次成分が重畳されたものである。
図３４は，本実施の形態によって生じるコギング推力の状況を示すものであり，高次のコギング推力成分も含めたものである。本実施の形態は，電気角９０度のスキューを施しているため，電機子ブロック４，９に発生するコギング推力には，２次成分が含まれていない。従って，二者の合成によるコギング推力は第５の実施の形態よりもさらに低減することができる。
また，本実施の形態も前実施の形態同様，予め構成した電機子ブロックを傾斜して配置するだけの簡単な可動子構造によって，上述の効果を得ることができる。
［産業上の利用可能性］
以上のように本発明にかかるリニアモータは、ＦＡ機器の搬送システム、例えば工作機のテーブル送りに用いられるものとして有用である。
【図面の簡単な説明】
図１は、本発明の第１の実施の形態によるリニアモータの縦断面図である。図２は、第１の実施の形態の電機子コイル配置図であり、（ａ）は電機子コイル配置、（ｂ）は電機子コイルの推力方向配列を示す。図３は、第１の実施の形態によるコギング推力の説明図である。図４は、本発明の第２の実施の形態によるリニアモータの縦断面図である。図５は、第２の実施の形態の電機子コイル配置図であり、（ａ）は電機子コイル配置、（ｂ）は電機子コイルの推力方向配列をしめす。図６は、第２の実施の形態によるコギング推力の説明図である。図７は、本発明の第３の実施の形態によるリニアモータの縦断面図である。図８は、第３の実施の形態の電機子コイル配置図であり、（ａ）は電機子コイル配置、（ｂ）は電機子コイルの推力方向配列を示す。図９は、第３の実施の形態によるコギング推力の説明図である。図１０は、本発明の第４の実施の形態によるリニアモータの縦断面図である。図１１は、第４の実施の形態の電機子コイル配置図であり、（ａ）は電機子コイル配置、（ｂ）は電機子コイルの推力方向配列を示す。図１２は、第４の実施の形態によるコギング推力の説明図である。図１３は、本発明の第５実施の形態によるリニアモータの縦断面図である。図１４は、第５の実施の形態の電機子コイル配置図であり、（ａ）は電機子コイル配置、（ｂ）は電機子コイルの推力方向配列をしめす。図１５は、第５の実施の形態によるコギング推力の説明図である。図１６は、第５の実施の形態による循環電流を説明するベクトル図である。図１７は、第６の実施の形態の電機子コイル配置図であり、（ａ）は電機子コイル配置、（ｂ）は電機子コイルの推力方向配列を示す。図１８は、第７、第８の実施の形態の説明図であり、（ａ）はリニアモータの縦断面図、（ｂ）は第７の実施の形態の電機子コイルの推力方向配列図、（ｃ）は第８の実施の形態の電機子コイルの推力方向配列図である。図１９は、第７の実施の形態の電機子コイル配置図である。図２０は、第８の実施の形態の電機子コイル配置図である。図２１は、第９、第１０の実施の形態の説明図であり、（ａ）はリニアモータの縦断面図、（ｂ）は第９の実施の形態の電機子コイルの推力方向配列図、（ｃ）は第１０の実施の形態の電機子コイルの推力方向配列図である。図２２は、第９の実施の形態の電機子コイル配置図である。図２３は、第１０の実施の形態の電機子コイル配置図である。図２４は、第１１、第１２の実施の形態の説明図であり、（ａ）はリニアモータの縦断面図、（ｂ）は第１１の実施の形態の電機子コイルの推力方向配列図、（ｃ）は第１２の実施の形態の電機子コイルの推力方向配列図である。図２５は、第１１の実施の形態の電機子コイル配置図である。図２６は、第１２の実施の形態の電機子コイル配置図である。図２７は、リニアモータの推力方向と直角な面の縦断面図である。図２８は、本発明によるコアセグメントを説明する平面図である。図２９は、本発明による温度センサの設置状況を説明するリニアモータの縦断面図である。図３０は、第１３の実施の形態によるリニアモータの上面から見た図であり，電機子ブロックの傾斜を示す。図３１は、第１の実施の形態による高次成分を含むコギング推力の説明図である。図３２は、第１３の実施の形態による高次成分を含むコギング推力の説明図である。図３３は、第１４の実施の形態によるリニアモータの上面から見た図であり，電機子ブロックの傾斜を示す。図３４は、第１４の実施の形態による高次成分を含むコギング推力の説明図である。図３５は、従来のリニアモータの説明図である。[Technical field]
The present invention relates to a linear motor that can suppress generation of cogging thrust, reduce the length of an armature, and improve coil temperature detection accuracy.
[Background technology]
In the conventional moving coil type linear motor, as shown in FIG. 35, a field permanent magnet 41 provided in a fixed portion and a comb-like armature core 42 opposed to the field permanent magnet 41 are provided. The armature core 42 is provided with a plurality of teeth 44, and the armature coils 43 wound in a distributed manner are wound around the teeth 44. The armature core 42 around which the armature coil 43 is wound has an armature core 42, where n is the number of phases, p is the number of field permanent magnets 41, and q is the number of teeth 44 facing each pole. The number N of the teeth 44 provided in the armature core N is N = n × p × q. The three-phase windings U, V of the armature coil 43 are disposed on the armature core 42 provided at equal intervals in the thrust direction X. W was provided by a coil jump having a teeth pitch of at least 2 or more.
For this reason, in the conventional moving coil type linear motor, since the magnetic circuit of the moving armature core is not endless and is open at both ends, the slots at both ends in the armature thrust direction are at the center portion. Unlike the slot, only one coil is accommodated, and an end effect is generated by this slot, and one period of cogging torque TC is generated in the magnetic pole pitch of the field magnet, thereby generating thrust unevenness.
In addition, in order to control the temperature of the coil, when a temperature sensor is inserted into the slot containing the coil, it is necessary to enlarge the slot, and the armature core becomes large and the winding space factor is reduced. There is. For this reason, in the linear motor, temperature sensors are provided at both ends of the coil. However, since temperature measurement at the center of the coil cannot be performed, high-precision temperature detection cannot be obtained.
The present invention has been made to solve the above problem, and provides a linear motor that can suppress the generation of cogging thrust, shorten the length of the armature in the thrust direction, and improve the coil temperature detection accuracy. Objective.
[Disclosure of the Invention]
In order to solve the above problem, the present invention of claim 1 comprises a field magnetic pole arranged at an equal pitch and an armature facing the field magnetic pole, and the armature is divided into a plurality of armature blocks. The block cores of each armature block are provided with teeth that are integral multiples of the number of phases arranged at equal pitches and armature coils that are concentratedly wound around the teeth. A gap corresponding to an electrical angle that is an integral multiple of the value obtained by dividing the magnetic pole pitch by the number of armature blocks is provided between the child blocks, and the armature coils of each armature block are connected to each other as a gap between the armature blocks. It features a linear motor that is wound by shifting the phase at a corresponding electrical angle.
The present invention of claim 2 is the linear motor according to claim 1, wherein the number of blocks of the armature is an integral multiple of 3, and a gap having a size of 2/3 of the magnetic pole pitch is provided between the armature blocks. The block core of each armature block is provided with 3 × a (a = integer) teeth at an equal pitch, and the number of field magnetic poles per armature block is 2 × a (a = integer) and arranged at an equal pitch. The armature coils are wound in the order of the U-phase coil, the V-phase coil, and the W-phase coil in all of the block core teeth of the first armature block, and all of the block core teeth of the second armature block Armature coils are wound in the order of V-phase coil, W-phase coil, and U-phase coil, and all the core teeth of the third armature block are electrically connected in the order of W-phase coil, U-phase coil, and V-phase coil. Involve the child coil When the number of armature blocks exceeds 3, the above coil arrangement is repeated and each phase coil of each armature block is three-phase balanced.
Further, the present invention of claim 3 is the linear motor according to claim 1, wherein the number of blocks of the armature is an integral multiple of 3, and a gap having a size of 1/3 of the magnetic pole pitch is provided between the armature blocks. A block core of each armature block is provided with 3 × a (a = integer) teeth at an equal pitch, and the number of field magnetic poles per armature block is 2 × a (a = integer) and arranged at an equal pitch. The armature coils are wound in the order of the U-phase coil, the V-phase coil and the W-phase coil in all the block core teeth of the first armature block, and all the block core teeth of the second armature block are The armature coils are wound in the order of the W-phase coil, U-phase coil, and V-phase coil in the reverse order of the winding method of the first armature block, and all of the teeth of the block core of the third armature block V-phase coil, W-phase carp The armature coil is wound in the order of the coil and the U-phase coil, and when the number of armature blocks exceeds 3, the above coil arrangement is repeated, and each phase coil of each armature block is three-phase balanced. It is said.
Further, the present invention of claim 4 is the linear motor according to claim 1, wherein three armature blocks are used, and the length in the thrust direction of each armature block is set to 10 times the field magnetic pole pitch. Nine teeth are provided in the block core of each armature block at an equal pitch, a gap having a size of 2/3 of the magnetic pole pitch is provided between the armature blocks, and arranged in the thrust direction. The block core of each armature block The teeth are grouped in groups of three, and the armature coils are wound in the order of the U-phase coil, the W-phase coil, and the V-phase coil in the teeth group of the block core of the first armature block, and the second armature block The armature coils are wound in the order of the V-phase coil, U-phase coil, and W-phase coil in the block core tooth group, and the W-phase coil is inserted in the block core tooth group of the third armature block. , Winding the armature coil at the V-phase coil, the U-phase coil sequence, it is characterized in that the 3-phase balanced connection by arranging the armature coil with a phase difference of 120 °.
Further, according to the present invention of claim 5, in the linear motor according to claim 1, three armature blocks are used, and the length in the thrust direction of each armature block is 10 times the field magnetic pole pitch. Nine teeth are provided in the block core of each armature block at an equal pitch, and a gap having a size of 1/3 of the magnetic pole pitch is provided between the armature blocks and arranged in the thrust direction. The three teeth are grouped in groups, and the armature coils are wound in the order of the U-phase coil, the W-phase coil, and the V-phase coil in the tooth group of the block core of the first armature block, and the second armature block The armature coil is wound on the tooth group of the block core in the order of the W-phase coil, the V-phase coil, and the U-phase coil with the winding direction reversed from that of the first armature block. The armature coils are wound around the teeth group of the lock core in the same direction as the first armature block in the order of the V-phase coil, U-phase coil, and W-phase coil, and the armature coils are arranged with a phase difference of 60 °. It is characterized by a phase equilibrium connection.
Further, the present invention of claim 6 is the linear motor according to claim 1, wherein two armature blocks are used, and the length in the thrust direction of each armature block is set to 10 times the field magnetic pole pitch. Nine teeth are provided in the block core of each armature block at an equal pitch, and a gap having a size of 1/2 of the magnetic pole pitch is provided between the armature blocks and arranged in the thrust direction. The teeth are grouped in groups of three, and the armature coils are wound in the order of the U-phase coil, the W-phase coil, and the V-phase coil in the teeth group of the block core of the first armature block, and the second armature block The first and second teeth of the block core teeth group are W-phase coils, the third, fourth, and fifth teeth are V-phase coils, and the sixth, seventh, and eighth teeth are respectively That U-phase coil, the ninth tooth winding the armature coils in the order of W-phase coil, and the armature coils characterized in that the three-phase balanced connection and arranged with a phase difference of 90 °.
Further, the present invention of claim 7 is the linear motor according to claim 1, wherein two armature blocks are used, and the length of each armature block in the thrust direction is set to 10 times the field magnetic pole pitch. Nine teeth are provided in the block core of each armature block at an equal pitch, and a gap having a size of 1/2 of the magnetic pole pitch is provided between the armature blocks and arranged in the thrust direction. The teeth are grouped in groups of three, and the armature coils are wound in the order of the U-phase coil, the W-phase coil, and the V-phase coil in the teeth group of the block core of the first armature block, and the second armature block The armature coil is wound around the tooth group of the block core in the order of V-phase coil, U-phase coil, and W-phase coil, and the armature coils are arranged with a phase difference of 90 °, and three-phase balanced connection is made. It is set to.
Further, the present invention of claim 8 is the linear motor of claim 1, wherein 2 × c (c = integer) armature blocks are used, and the length of each armature block in the thrust direction is set to the field pole pitch. 10 times the length of the armature block, 12 teeth are provided at equal pitches in the block core of each armature block, a gap having a size of 1/2 of the magnetic pole pitch is provided between the armature blocks, and arranged in the thrust direction. Each armature block has a block core tooth group of three, and the first armature block block core tooth group has a forward wound U-phase coil, forward wound V-phase coil, reverse wound u-phase coil. The armature coils are wound in the order of the reverse-winding v-phase coil, and the forward-winding V-phase coil, the reverse-winding u-phase coil, the reverse-winding v-phase are wound on the tooth group of the block core of the second armature block. Yl, winding the armature coil in the positive direction winding U-phase coil sequence, if the number of the armature block is more than 2 is characterized in that the 2-phase connection entrainment armature coils repeat the above.
According to a ninth aspect of the present invention, in the linear motor according to the first aspect, 2 × d (d = integer) armature blocks are used, and the length of each armature block in the thrust direction is set to the field pole pitch. 10 times the length of the armature block, 12 teeth are provided at equal pitches in the block core of each armature block, a gap having a size of 1/2 of the magnetic pole pitch is provided between the armature blocks, and arranged in the thrust direction. The tooth of the block core of each armature block is made into two groups, and a forward-winding U-phase coil, a reverse-winding v-phase coil, a forward-winding W-phase coil are added to the block core teeth group of the first armature block. , Reverse-winding u-phase coil, forward-winding V-phase coil, reverse-winding w-phase coil are wound in the order of the armature coil, and the forward-winding V-phase is wound on the tooth group of the block core of the second armature block. Armature coil in the order of coil, forward winding W phase coil, reverse winding u phase coil, forward winding V phase coil, reverse winding w phase coil, forward winding U phase coil, reverse winding v phase coil When the number of windings and armature blocks exceeds 2, the above is repeated and the armature coil is wound to form a three-phase connection.
According to a tenth aspect of the present invention, in the linear motor according to the first aspect, 3 × e (e = integer) armature blocks are used, and the length of each armature block in the thrust direction is determined by the field pole pitch. 10 times the length of the armature block, 12 teeth are provided at equal pitches in the block core of each armature block, and a gap of 2/3 of the magnetic pole pitch is provided between the armature blocks and arranged in the thrust direction. Each armature block has a block core tooth group of three, and the first armature block block core tooth group has a forward wound U-phase coil, forward wound V-phase coil, reverse wound u-phase coil. The armature coils are wound in the order of the reverse-winding v-phase coil, and the reverse-winding u-phase coil, the reverse-winding v-phase coil, the forward-winding U are wound on the tooth group of the block core of the second armature block. The armature coil is wound in the order of the coil, the reverse-winding v-phase coil, and the reverse-winding u-phase coil, and the reverse-winding v-phase coil and the forward-winding U-phase coil are inserted into the tooth group of the block core of the third armature block. In this case, the armature coils are wound in the order of the reverse-winding v-phase coil, the forward-winding U-phase coil, and the forward-winding V-phase coil. It is characterized by a phase connection.
The present invention according to claim 11 is the linear motor according to claim 1, wherein 3 × f (f = integer) armature blocks are used, and the length of each armature block in the thrust direction is set to the field pole pitch. 10 times the length of the armature block, 12 teeth are provided at equal pitches in the block core of each armature block, and a gap of 2/3 of the magnetic pole pitch is provided between the armature blocks and arranged in the thrust direction. The tooth of the block core of each armature block is made into two groups, and a forward-winding U-phase coil, a reverse-winding v-phase coil, a forward-winding W-phase coil are added to the block core teeth group of the first armature block. , Reverse-winding u-phase coil, forward-winding V-phase coil, reverse-winding w-phase coil are wound in the order of the armature coil, and forward-winding V is wound on the tooth group of the block core of the second armature block. The armature coil is wound in the order of the coil, the reverse-wound w-phase coil, the forward-winding U-phase coil, the reverse-winding v-phase coil, the forward-winding W-phase coil, and the reverse-winding u-phase coil. The teeth group of the block core of the block includes a forward winding W-phase coil, a reverse winding u-phase coil, a forward winding V-phase coil, a reverse winding w-phase coil, a forward winding W-phase coil, a reverse winding U-phase coil, and a reverse winding v-phase coil. The armature coils are wound in order, and when the number of armature blocks exceeds 3, the above is repeated and the armature coils are wound to form a three-phase connection.
According to a twelfth aspect of the present invention, in the linear motor according to the first aspect, 3 × g (g = integer) armature blocks are used, and the length of each armature block in the thrust direction is set to the field pole pitch. And 12 teeth are provided at equal pitches in the block core of each armature block, and a gap of 1/3 of the magnetic pole pitch is provided between the armature blocks and arranged in the thrust direction. Each armature block has a block core tooth group of three, and the first armature block block core tooth group has a forward wound U-phase coil, forward wound V-phase coil, reverse wound u-phase coil. The armature coils are wound in the order of the reverse-winding v-phase coil, and the positive-winding V-phase coil, the positive-winding U-phase coil, the positive-winding V are wound on the tooth group of the block core of the second armature block. The armature coil is wound in the order of the coil, the reverse-winding u-phase coil, and the reverse-winding v-phase coil, and the reverse-winding u-phase coil and the reverse-winding v-phase coil are inserted into the tooth group of the block core of the third armature block. When the number of armature blocks exceeds 3, the above is repeated to wind the armature coil 2 in the order of the forward-winding U-phase coil, the forward-winding V-phase coil, and the reverse-winding u-phase coil. It is characterized by a phase connection.
According to a thirteenth aspect of the present invention, in the linear motor according to the first aspect, 3 × h (h = integer) armature blocks are used, and the length of each armature block in the thrust direction is set to the field pole pitch. And 12 teeth are provided at equal pitches in the block core of each armature block, and a gap of 1/3 of the magnetic pole pitch is provided between the armature blocks and arranged in the thrust direction. The tooth of the block core of each armature block is made into two groups, and a forward-winding U-phase coil, a reverse-winding v-phase coil, a forward-winding W-phase coil are added to the block core teeth group of the first armature block. , Reverse-winding u-phase coil, forward-winding V-phase coil, reverse-winding w-phase coil are wound in the order of the armature coils, and the reverse-winding w is wound on the tooth group of the block core of the second armature block. The armature coil is wound in the order of the coil, the forward winding U-phase coil, the reverse winding v-phase coil, the forward winding W-phase coil, the reverse winding u-phase coil, and the forward winding V-phase coil. The teeth group of the block core of the block includes a forward-winding V-phase coil, a reverse-winding w-phase coil, a forward-winding U-phase coil, a reverse-winding v-phase coil, a forward-winding W-phase coil, and a reverse-winding W-phase coil. The armature coils are wound in order, and when the number of armature blocks exceeds 3, the above is repeated and the armature coils are wound to form a three-phase connection.
Further, the present invention of claim 14 is the linear motor according to any one of claims 1 to 13, wherein the block core constituting the armature block is opposite to the engaging protrusion formed on one side. It consists of a core segment consisting of a yoke part having an engaging part formed so as to be fitted to this engaging projection and a tooth around which each armature coil is wound. The field magnetic poles are arranged so as to sandwich the longitudinal direction of the block core row from both sides.
Moreover, the present invention of claim 15 is the linear motor according to any one of claims 1 to 14, wherein the block core constituting the armature block has a lower end portion forming a tooth portion and an upper end portion. Is provided with a block core in which a plurality of T-shaped core segments forming the yoke portion are connected to each other at the yoke portion.
According to a sixteenth aspect of the present invention, in the linear motor according to any one of the first to fifteenth aspects, a gap piece made of a magnetic material is provided between the yoke portions of the block core in the gap between the armature blocks. And a temperature sensor is mold-supported in the space above the spacing piece.
According to a seventeenth aspect of the present invention, in the linear motor according to any one of the first to sixteenth aspects, the armature block is inclined by a predetermined angle in a direction orthogonal to the thrust direction of the armature block. It is characterized by being arranged.
Further, the present invention of claim 18 is the linear motor according to any one of claims 1 to 17, wherein three armature blocks are used, the thickness width of the armature block is set to W, and the magnetic pole pitch is set to When Pm is set, the inclination angle θ of the armature block is
θ = sin ^-1 (Pm / 3W)
It is characterized by that.
According to a nineteenth aspect of the present invention, in the linear motor according to any one of the first to seventeenth aspects, the two armature blocks are used, the stacking width of the armature block is W, and the magnetic pole pitch is When Pm is set, the inclination angle θ of the armature block is
θ = sin ^-1 (Pm / 2W)
It is characterized by that.
[Best Mode for Carrying Out the Invention]
The linear motor includes a field magnetic pole and an armature facing the field magnetic pole, and one of them is used as a stator and the other as a mover. According to the present invention, in order to suppress the cogging thrust generated in the linear motor, the armature is divided into a plurality of parts, and a phase difference is provided between the divided armature blocks so that the generated cogging thrust is generated between the armature blocks. To offset. Therefore, the armature coils are concentrated windings, and a gap corresponding to an electrical angle that is an integral multiple of the value obtained by dividing the magnetic pole pitch by the number of armature blocks is provided between the armature blocks. The phase is shifted by an electrical angle corresponding to the gap.
Next, embodiments of the present invention will be described with reference to the drawings.
[First Embodiment]
FIG. 1 shows the first embodiment, and shows the case of 3 armature blocks, 9 teeth per armature block, and 6 field poles per armature block. The field magnetic pole 1 is made of a permanent magnet and is provided on the stator 2 side at an equal pitch. On the stator 2, an armature 3 forming a mover is provided. The armature 3 includes a first armature block 4, a second armature block 5, and a third armature block 6, and a gap piece 7 is provided between the armature blocks to maintain a gap. . In this case, the gap size is 2/3 of the magnetic pole pitch Pm. The armature blocks 4, 5, 6 and the spacing piece 7 are arranged in the thrust direction and are integrally held by the fixing means 8. Nine teeth 10 arranged at equal tooth pitches Pt are provided on the block cores 9 of the armature blocks 4, 5, 6. A concentrated winding armature coil 11 is wound around each tooth 10. The field magnetic pole 1 may be a permanent magnet type or a winding excitation type. Arranged at Pm. Since the magnetic pole pitch Pm is an electrical angle of 180 °, the gap dimension Pm × 2/3 is 120 ° in electrical angle. Therefore, the teeth pitch Pt is set to an electrical angle of 120 °. Therefore, the armature coil arrangement of each armature block 4, 5, 6 is as shown in FIG. That is, in the first armature block 4, the armature coil 11 is wound in the order of the U-phase coil, the V-phase coil, and the W-phase coil, and in the second armature block 5, the V-phase coil, the W-phase coil, the U-phase In the third armature block 6, the armature coils 11 are wound in the order of the W phase coil, the U phase coil, and the V phase coil, the number of armature blocks exceeds 3, When it becomes 9 blocks, 12 blocks, etc., the above arrangement is repeated and each phase coil is three-phase balanced. When the armature coil 11 is provided in this way, the coil arrangement in the thrust direction of the armature 3 is as shown in FIG. 2B, and the electrical angle 120 is next to the last coil W phase of the first armature block 4. Since there is an interval piece 7 of O and occupies the U-phase portion, the start of winding of the armature coil 11 of the second armature block 5 becomes the V-phase. Similarly, the winding start of the armature coil 11 of the third armature block 6 becomes the W phase.
FIG. 3 shows the situation of cogging thrust generated by the above configuration. In the figure, TC1 is a cogging thrust generated by the first armature block 4, TC2 is a cogging thrust generated by the second armature block 5, and TC3 is a cogging thrust generated by the third armature block 6. It can be seen that the combination of the three cancels out the cogging thrust.
[Second Embodiment]
FIG. 4 shows a second embodiment, and shows a case where the number of armature blocks is 3, the number of teeth per armature block is 9, and the number of field magnetic poles is 6 per armature block. The field magnetic pole 1 is made of a permanent magnet and is provided on the stator 2 side at an equal pitch. On the stator 2, an armature 3 forming a mover is provided. The armature 3 includes a first armature block 4, a second armature block 5, and a third armature block 6, and a gap piece 7 is provided between the armature blocks to maintain a gap. . In this case, the gap dimension is 1/3 of the magnetic pole pitch Pm. The armature blocks 4, 5, 6 and the spacing piece 7 are arranged in the thrust direction and are integrally held by the fixing means 8. Nine teeth 10 arranged at equal tooth pitches Pt are provided on the block cores 9 of the armature blocks 4, 5, 6. A concentrated winding armature coil 11 is wound around each tooth 10. The field magnetic pole 1 may be of a permanent magnet type or a winding excitation type, and has an equal pitch over the entire length of the stator 2 having a length obtained by adding a linear motor stroke to the entire length of the armature 3 in the thrust direction. Arranged at Pm. Since the magnetic pole pitch Pm is an electrical angle of 180 °, the gap dimension Pm × 1/3 is 60 ° in electrical angle. Further, the teeth pitch Pt is set to an electrical angle of 120 °. Therefore, the armature coil arrangement of each armature block 4, 5, 6 is as shown in FIG. That is, in the first armature block 4, the armature coil 11 is wound in the order of the U-phase coil, the V-phase coil, and the W-phase coil, and in the second armature block 5, the winding direction of the first armature block In the third armature block 6, the armature coil 11 is wound in the order of the V-phase coil, the W-phase coil, and the U-phase coil. When the number of armature blocks exceeds 3, resulting in 6 blocks, 9 blocks, 12 blocks, etc., the above arrangement is repeated and each phase coil is connected in a three-phase balanced connection. When the armature coil 11 is provided in this way, the coil arrangement in the thrust direction of the armature 3 is as shown in FIG. 5B, and the electrical angle 60 is next to the last coil W phase of the first armature block 4. Since there is an interval piece 7 °, the start of winding of the armature coil 11 of the second armature block 5 is a W phase opposite to the winding direction of the first armature block. Similarly, the winding start of the armature coil 11 of the third armature block 6 becomes the V phase.
FIG. 6 shows the state of cogging thrust generated by the above configuration. In the figure, TC1 is a cogging thrust generated by the first armature block 4, TC2 is a cogging thrust generated by the second armature block 5, and TC3 is a cogging thrust generated by the third armature block 6. It can be seen that the combination of the three cancels out the cogging thrust.
[Third Embodiment]
FIG. 7 is a longitudinal sectional view of a linear motor showing a third embodiment. In this embodiment, similarly to the first embodiment, the armature 3 has first, second, and third armature blocks 4, 5, 6 having nine teeth 10 in the block core 9. An interval piece 7 having a size of 2/3 of the magnetic pole pitch Pm (electrical angle 120 °) is arranged between the armature blocks, and the armature blocks are separated and held together by the fixing means 8. However, the number of field magnetic poles 1 provided on the stator 2 is 10 for each armature block. Then, as shown in FIG. 8 (a), three teeth are grouped, and the first armature block 4 is provided with a U-phase coil and a W-phase so that the armature coil has a phase shift of 120 °. The armature coils are wound in the order of the coil and the V-phase coil, the second armature block 5 is in the order of the V-phase coil, the U-phase coil, and the W-phase coil, and the third armature block 6 is in the order of W The armature coil 11 is wound in the order of phase coil, V phase coil, and U phase coil. The arrangement of the coil in the thrust direction and the spacing piece 7 at this time is as shown in FIG. Also in this embodiment, the cogging thrusts TC1, TC2, and TC3 generated by the end effects of the first, second, and third armature blocks produce a phase difference of 120 ° as shown in FIG. Becomes zero and is countered.
[Fourth Embodiment]
FIG. 10 is a longitudinal sectional view of a linear motor according to the fourth embodiment. In the case of this embodiment, the number of field magnetic poles 1 provided on the stator 2 is 10 per armature block, and the number of teeth 10 of the block core 9 of the armature 3 is 9. The point is the same as the third embodiment. The difference is that the dimension of the spacing piece 12 between the first, second and third armature blocks 4, 5, 6 is 1/3 of the magnetic pole pitch Pm, and the thrust of the fixing means 13 for the armature 3. This is the point where the direction dimension is shortened. That is, an example is shown in which each armature block is shifted by 60 ° in terms of electrical angle.
For this reason, as shown in FIG. 11A, the armature coil arrangement is such that, in the first armature block 4, the U-phase coil, the W-phase coil, and the V-phase coil are sequentially wound from the end in order. In the armature block 5, a W-phase coil, a V-phase coil, and a U-phase coil in which the winding direction of the coil is reversed are sequentially wound in order to shift the phase of the first armature block 4 by 60 ° in electrical angle. In the third armature block 6, a V-phase coil, a U-phase coil, and a W-phase are wound in the same winding direction as the coil of the first armature block 4 so as to have a phase difference of 60 ° with the second armature block 5. Wind in the order of the coils. The arrangement in the thrust direction of the armature coil thus wound is shown in FIG. Due to this armature coil arrangement, the cogging thrust TC1 generated in the first armature block 4, the cogging thrust TC2 generated in the second armature block 5, and the cogging thrust TC3 generated in the third armature block 6 are respectively shown in FIG. As shown in FIG. 12, the phase difference is 60 °, the sum is zero, and the cogging thrust is cancelled.
[Fifth Embodiment]
FIG. 13 is a longitudinal sectional view of a linear motor according to the fifth embodiment. In this embodiment, the dimensional arrangement of the field magnetic poles 1 provided on the stator 2 and the dimensional structure of the block core 9 including the number of teeth 10 are the same as those in the fourth embodiment. The armature 3 has a two-split structure of the first armature block 4 and the second armature block 5, and the gap between the armature blocks, that is, the width dimension of the spacing piece 14 is 1/2 of the magnetic pole pitch Pm. The difference is that the fixing means 15 is shortened by one armature block.
Therefore, the armature coil arrangement shown in FIG. 14A is adopted for each armature block. That is, nine teeth 10 are divided into three groups in the first armature block 4, and the armature coils are wound in the order of the U-phase coil, the W-phase coil, and the V-phase coil. In the child block 5, the first and second teeth are respectively W-phase coils, the third, fourth, and fifth teeth are V-phase coils, and the sixth, seventh, and eighth teeth are U. A W-phase coil is wound around the phase coil and the ninth tooth. FIG. 14B shows an arrangement in the thrust direction of the armature coil and the spacing piece 14 in this case. With this configuration, as shown in FIG. 15, the cogging thrust TC1 due to the first armature block 4 and the cogging thrust TC2 due to the second armature block 5 have a phase difference of 90 °, and the sum is It becomes zero and is countered.
FIG. 16 is a vector diagram for explaining the circulating current according to the present embodiment.
By connecting in-phase coils of the first armature block 4 and the second armature block in series, the phase of the magnetomotive force vector generated in both armature blocks is vector-synthesized as shown in FIG. , Circulating current can be eliminated.
[Sixth Embodiment]
FIG. 17 shows a sixth embodiment. In this case, the example which changed only the armature coil part of 5th Embodiment is shown. That is, in the first armature block 4, the armature coils are wound around the three tooth groups in the order of the U-phase coil, the W-phase coil, and the V-phase coil. By winding a phase coil, a U-phase coil, and a W-phase coil, a three-phase balanced connection can be made with a phase difference of 90 °. The arrangement in the thrust direction of the armature coil and the spacing piece 14 in this case is shown in FIG. Also in this embodiment, as shown in FIG. 15, the cogging thrust TC1 of the first armature block and the cogging thrust TC2 of the second armature block that are 90 ° out of phase cancel each other. As in the fifth embodiment, the circulating current can be eliminated by the synthesis of the magnetomotive force vectors.
[Seventh Embodiment]
FIG. 18 shows a seventh embodiment. In the case of this embodiment, as shown in FIG. 18A, the number of divisions of the armature 3 is 2, and 12 are provided in the block core 19 of the first armature block 16 and the second armature block 17. Teeth 20 are provided, and the tooth pitch Pt is set to 150 °. A gap ½ of the magnetic pole pitch Pm is provided between the armature blocks 16 and 17, and a spacing piece 21 is provided there and held integrally by the fixing means 22.
Ten field magnetic poles 1 arranged on the stator 2 are provided per armature block. That is, the length of the armature blocks 16 and 17 in the thrust direction is 10 times the magnetic pole pitch Pm. Here, as shown in FIG. 19, the armature coil 23 provided in the first armature block 16 includes a forward winding U-phase coil, a forward winding V-phase coil, and a reverse winding for each group of three teeth. It winds in order of a winding u phase coil and a reverse direction winding v phase coil. As shown in FIG. 19, the second armature block 17 is wound with a forward winding V-phase coil, a reverse winding u-phase coil, a reverse winding v-phase coil, and a forward winding U-phase coil. The armature coils of the block are connected in two phases. The arrangement of the armature coils in the thrust direction in this case is as shown in FIG. As a result, the phase difference between both armature blocks is 90 °, and the cogging thrust is canceled and becomes zero, as in the case shown in FIG.
[Eighth Embodiment]
Next, an eighth embodiment will be described. In the eighth embodiment, a three-phase armature coil is applied to the armature block of the seventh embodiment.
In this case, the teeth of each armature block are grouped in groups of two, and as shown in FIG. 20, the first armature block 16 includes a forward winding U-phase coil, a reverse winding v-phase coil, and a forward direction. An armature coil is wound in the order of a wound W-phase coil, a reverse-winding u-phase coil, a forward-winding V-phase coil, and a reverse-winding w-phase coil, and the second armature block 17 has a forward-winding V-phase coil. Wake up the armature coil in the following order: forward winding W phase coil, reverse winding u phase coil, forward winding V phase coil, reverse winding w phase coil, forward winding U phase coil, reverse winding v phase coil Three-phase connection. FIG. 18C shows the thrust direction arrangement of the armature coils in this case. Also in this embodiment, since the phase difference between the armature blocks is 90 °, the cogging thrust becomes zero as in the case shown in FIG.
[Ninth Embodiment]
FIG. 21A is a longitudinal sectional view of a linear motor according to the ninth embodiment.
In this embodiment, the number of field magnetic poles 1 provided on the stator 2 is 10 per armature block, the number of divisions of the armature 3 is 3, and the first, second, and third armature blocks 16 are provided. , 17 and 18 have 12 teeth (tooth pitch Pt is an electrical angle of 150 °). And between the armature blocks, an interval piece 24 having a size of 2/3 of the magnetic pole pitch Pm is inserted, and three sets of armature blocks are integrally held by the fixing means 25. In this embodiment, as shown in FIG. 22, three teeth 20 are grouped, and a forward winding U phase coil, a forward winding V phase coil, a reverse winding u phase coil, and a reverse winding v phase coil are arranged in this order. The armature coil is wound on the tooth group of the block core of the second armature block, and the reverse-winding u-phase coil, the reverse-winding v-phase coil, the forward-winding U-phase coil, the reverse-winding v-phase coil, the reverse direction The armature coils are wound in the order of the wound u-phase coil, and the reverse-winding v-phase coil, the forward-winding U-phase coil, the reverse-winding v-phase coil, and the forward-winding are wound around the tooth group of the block core of the third armature block. The armature coil is wound in the order of the U-phase coil and the positive-direction V-phase coil to form a two-phase connection. The arrangement in the thrust direction of this armature coil is shown in FIG. The phase difference between the armature blocks of this embodiment is 120 °, and the sum of the cogging thrusts TC1, TC2, and TC3 by the first, second, and third armature blocks is as in the case shown in FIG. It becomes zero and is countered.
[Tenth embodiment]
Next, a tenth embodiment that is a three-phase system using the armature 3 of the ninth embodiment will be described.
As shown in FIG. 23, two teeth are grouped, and a forward-winding U-phase coil, a reverse-winding v-phase coil, a forward-winding W-phase coil, a reverse direction are added to the tooth group of the block core of the first armature block. An armature coil is wound in the order of a wound u-phase coil, a forward-winding V-phase coil, and a backward-wound w-phase coil, and a forward-winding V-phase coil and a reverse-winding are wound on the tooth group of the block core of the second armature block. The armature coils are wound in the order of w-phase coil, forward-winding U-phase coil, reverse-winding v-phase coil, forward-winding W-phase coil, and reverse-winding u-phase coil, and the third armature block block core Teeth group in the order of forward wound W phase coil, reverse wound u phase coil, forward wound V phase coil, reverse wound w phase coil, forward wound U phase coil, reverse wound v phase coil In a three-phase connection winding the armature coils. Also in this embodiment, the phase difference is 120 °, and the cogging thrust is zero as shown in FIG.
[Eleventh embodiment]
FIG. 24A is a longitudinal sectional view of a linear motor according to the eleventh embodiment. This embodiment is the same as the ninth and tenth embodiments except for the spacing piece 26, the fixing means 27, and the armature coil arrangement. That is, the spacing piece 26 provided between the first, second, and third armature blocks 16, 17, and 18 is 1/3 (60 ° in electrical angle) of the magnetic pole pitch Pm. 17 and 18 and the spacing piece 26 are held together by a fixing means 27. As shown in FIG. 25, the armature coil 23 is provided with three teeth as a group, and a forward-winding U-phase coil, a forward-winding V-phase coil, a reverse-winding coil group in the tooth group of the block core of the first armature block. The armature coils are wound in the order of the direction-wound u-phase coil and the reverse-winding v-phase coil, and the positive-winding V-phase coil, the positive-winding U-phase coil and the positive-direction are wound on the tooth group of the block core of the second armature block The armature coil is wound in the order of the wound V-phase coil, the reverse-winding u-phase coil, and the reverse-winding v-phase coil, and the reverse-winding u-phase coil and the reverse-winding are wound on the tooth group of the block core of the third armature block. An armature coil is wound in the order of a v-phase coil, a forward-winding U-phase coil, a forward-winding V-phase coil, and a reverse-winding u-phase coil, and two-phase connection is made. The arrangement of the thrust direction of the armature coils is shown in FIG. With this configuration, the cogging thrust is canceled and becomes zero as shown in FIG.
[Twelfth embodiment]
In the twelfth embodiment, the armature coil of the eleventh embodiment is a three-phase connection. In this case, as shown in FIG. 26, two teeth are grouped into a group of teeth of the block core of the first armature block, and a forward wound U phase coil, a reverse wound v phase coil, a forward wound W phase The armature coil is wound in the order of the coil, the reverse-winding u-phase coil, the forward-winding V-phase coil, and the reverse-winding w-phase coil, and the reverse-winding w-phase coil is inserted into the tooth group of the block core of the second armature block. A third armature block in which an armature coil is wound in the order of a forward winding U-phase coil, a reverse winding v-phase coil, a forward winding W-phase coil, a reverse winding u-phase coil, and a forward winding V-phase coil. To the tooth group of the block core, forward winding V phase coil, reverse winding w phase coil, forward winding U phase coil, reverse winding v phase coil, forward winding W phase coil, reverse winding Three-phase connection winding the armature coils in the phase coils order. The armature coil arrangement in the thrust direction in the case of this embodiment is shown in FIG. Further, the phase difference between the armature blocks of this embodiment is 60 °, and the cogging thrust is zero as in the case of FIG.
27A and 27B show an example of the structure of a linear motor, where FIG. 27A is a plan view seen from the top of the linear motor with a part broken away, and FIG. 27B is a longitudinal section of a plane perpendicular to the thrust direction A of the linear motor. FIG. The block core 28 constituting the armature block includes a yoke portion 28a in which an engagement projection 28b is formed on one side and an engagement portion 28c that engages with the engagement projection 28b is formed on the opposite side. 28a is sequentially fitted and connected. Further, the armature coil 31 is housed in the teeth 28d in an aligned winding. Further, the armature block 28 is held on the table 29 via bolts 29a. The field magnetic poles 33 held by the stator 32 are provided so as to be sandwiched via gaps on both sides in the longitudinal direction of the block core row. Reference numeral 30 denotes a cooling refrigerant passage for cooling the armature coil 31.
FIG. 28 shows an example of forming a block core. A plurality of T-shaped core segments 36 each having a lower end forming a teeth portion 34 and an upper end forming a yoke portion 35 are provided in the yoke portion 35. An example is shown in which the armature coils 39 can be arranged by fitting the engagement protrusions 38 to the engagement portions 37 and connecting them to each other.
29, in the embodiment shown in FIG. 7, the temperature sensor 40 is disposed in the upper space of the spacing piece 7 provided between the first, second, and third armature blocks, and this is adjacent to the resin mold 40a. The armature coil is held in contact with the armature coil. By doing so, the internal temperature of the armature coil can be detected.
[Thirteenth embodiment]
FIG. 30 is a top view of the linear motor according to the thirteenth embodiment, showing the inclination of the armature blocks 4, 5, and 6. As shown in FIG. In the figure, the fixing means 8 of the armature blocks 4, 5, 6 are removed for ease of explanation, and the lower surfaces of the armature blocks 4, 5, 6 are arranged in parallel with the field magnetic pole 1. Yes. The basic configuration of the armature is the same as that of the first embodiment. The side sectional view is the same as FIG. 1 at the center.
The difference from the first embodiment is that the armature blocks 4, 5, 6 are inclined with respect to a direction orthogonal to the thrust direction of the armature blocks 4, 5, 6 by a predetermined angle θ. It is that you are. For each inclination angle θ, if the thickness of the armature block is W and the magnetic pole pitch is Pm,
θ = sin ^-1 (Pm / 3W)
Is set to That is, it is inclined so as to have a skew of an electrical angle of 60 degrees (mechanical dimension Pm / 3).
Hereinafter, the effects of the present embodiment will be described in comparison with the first embodiment.
FIG. 31 shows the state of cogging thrust generated by the first embodiment, and includes higher-order cogging thrust components. In general, the cogging thrust includes a large amount of secondary and tertiary components in addition to the primary (electrical angle of 180 degrees). In the figure, TC1 is a cogging thrust generated by the armature block 4, TC2 is a cogging thrust generated by the armature block 5, and TC3 is a cogging thrust generated by the armature block 6. The cogging thrust generated by the combination of the three elements is obtained by canceling the primary and secondary components and superimposing the tertiary components.
FIG. 32 shows the state of cogging thrust generated by this embodiment, and includes higher-order cogging thrust components. In the present embodiment, a skew of 60 electrical degrees is applied, so that TC1, TC2, and TC3 do not include a third-order component. Therefore, the cogging thrust generated by the combination of the three can be further reduced as compared with the first embodiment.
In addition, in order to obtain the skew effect, conventionally, many permanent magnets are bonded diagonally or the cores of the armature blocks are stacked diagonally. According to the present embodiment, it can be realized by a simple mover structure in which armature blocks configured in advance are simply disposed at an inclination.
[Fourteenth embodiment]
FIG. 33 is a top view of the linear motor according to the fourteenth embodiment, showing the inclination of the armature blocks 4 and 9. In the drawing, the fixing means 8 of the armature blocks 4 and 9 are removed for easy explanation, and the lower surfaces of the armature blocks 4 and 9 are arranged in parallel with the field magnetic pole 1. The basic configuration of the armature is the same as that of the fifth embodiment. The side sectional view is the same as FIG. 13 at the center.
The fifth embodiment is different from the fifth embodiment in that the armature blocks 4 and 9 are inclined by a predetermined angle θ with respect to the direction orthogonal to the thrust direction of the armature blocks 4 and 9. . For each inclination angle θ, if the thickness of the armature block is W and the magnetic pole pitch is Pm,
θ = sin ^-1 (Pm / 2W)
Is set to That is, it is inclined so as to have a skew of an electrical angle of 90 degrees (mechanical dimension Pm / 2).
Hereinafter, the effects of the present embodiment will be shown in comparison with the fifth embodiment.
The cogging thrust generated by the fifth embodiment includes secondary and tertiary components in addition to the primary. The cogging thrust by the combination of the two is obtained by canceling the first and third orders and superposing the second order components.
FIG. 34 shows the situation of the cogging thrust generated by this embodiment, and includes higher-order cogging thrust components. In the present embodiment, since a skew with an electrical angle of 90 degrees is applied, the cogging thrust generated in the armature blocks 4 and 9 does not include a secondary component. Therefore, the cogging thrust generated by the combination of the two can be further reduced as compared with the fifth embodiment.
Further, in the present embodiment, as in the previous embodiment, the above-described effects can be obtained by a simple mover structure in which armature blocks configured in advance are simply disposed at an inclination.
[Industrial applicability]
As described above, the linear motor according to the present invention is useful as a transport system for FA equipment, for example, used for table feed of machine tools.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of a linear motor according to a first embodiment of the present invention. 2A and 2B are armature coil arrangement diagrams of the first embodiment, where FIG. 2A shows the armature coil arrangement, and FIG. 2B shows the thrust direction arrangement of the armature coils. FIG. 3 is an explanatory diagram of cogging thrust according to the first embodiment. FIG. 4 is a longitudinal sectional view of a linear motor according to the second embodiment of the present invention. 5A and 5B are armature coil arrangement diagrams according to the second embodiment, where FIG. 5A shows an armature coil arrangement, and FIG. 5B shows a thrust direction arrangement of the armature coils. FIG. 6 is an explanatory diagram of cogging thrust according to the second embodiment. FIG. 7 is a longitudinal sectional view of a linear motor according to the third embodiment of the present invention. FIG. 8 is an armature coil arrangement diagram according to the third embodiment. FIG. 8A shows an armature coil arrangement, and FIG. 8B shows a thrust direction arrangement of the armature coils. FIG. 9 is an explanatory diagram of cogging thrust according to the third embodiment. FIG. 10 is a longitudinal sectional view of a linear motor according to the fourth embodiment of the present invention. 11A and 11B are armature coil arrangement diagrams of the fourth embodiment, where FIG. 11A shows the armature coil arrangement, and FIG. 11B shows the thrust direction arrangement of the armature coils. FIG. 12 is an explanatory diagram of cogging thrust according to the fourth embodiment. FIG. 13 is a longitudinal sectional view of a linear motor according to a fifth embodiment of the present invention. 14A and 14B are armature coil arrangement diagrams according to the fifth embodiment. FIG. 14A shows an armature coil arrangement, and FIG. 14B shows a thrust direction arrangement of the armature coils. FIG. 15 is an explanatory diagram of cogging thrust according to the fifth embodiment. FIG. 16 is a vector diagram illustrating the circulating current according to the fifth embodiment. FIGS. 17A and 17B are armature coil arrangement diagrams of the sixth embodiment, where FIG. 17A shows the armature coil arrangement, and FIG. 17B shows the thrust direction arrangement of the armature coils. FIG. 18 is an explanatory diagram of the seventh and eighth embodiments, where (a) is a longitudinal sectional view of the linear motor, and (b) is a thrust direction arrangement diagram of the armature coil of the seventh embodiment, (C) is a thrust direction array diagram of the armature coil of the eighth embodiment. FIG. 19 is an armature coil arrangement diagram according to the seventh embodiment. FIG. 20 is an armature coil arrangement diagram according to the eighth embodiment. FIG. 21 is an explanatory diagram of the ninth and tenth embodiments, (a) is a longitudinal sectional view of a linear motor, (b) is a thrust direction arrangement diagram of the armature coil of the ninth embodiment, (C) is a thrust direction arrangement | sequence diagram of the armature coil of 10th Embodiment. FIG. 22 is an armature coil arrangement diagram according to the ninth embodiment. FIG. 23 is an armature coil arrangement diagram according to the tenth embodiment. FIG. 24 is an explanatory diagram of the eleventh and twelfth embodiments, where (a) is a longitudinal sectional view of the linear motor, and (b) is a thrust direction arrangement diagram of the armature coil of the eleventh embodiment, (C) is a thrust direction arrangement | sequence figure of the armature coil of 12th Embodiment. FIG. 25 is an armature coil arrangement diagram of the eleventh embodiment. FIG. 26 is an armature coil arrangement diagram according to the twelfth embodiment. FIG. 27 is a longitudinal sectional view of a plane perpendicular to the thrust direction of the linear motor. FIG. 28 is a plan view for explaining a core segment according to the present invention. FIG. 29 is a longitudinal sectional view of a linear motor for explaining the installation state of the temperature sensor according to the present invention. FIG. 30 is a top view of the linear motor according to the thirteenth embodiment and shows the inclination of the armature block. FIG. 31 is an explanatory diagram of cogging thrust including higher-order components according to the first embodiment. FIG. 32 is an explanatory diagram of cogging thrust including higher-order components according to the thirteenth embodiment. FIG. 33 is a view from the top of the linear motor according to the fourteenth embodiment, and shows the inclination of the armature block. FIG. 34 is an explanatory diagram of cogging thrust including higher-order components according to the fourteenth embodiment. FIG. 35 is an explanatory diagram of a conventional linear motor.

Claims

A field magnetic pole arranged at an equal pitch and an armature facing the field magnetic pole, the armature is divided into a plurality of armature blocks and arranged in the direction of thrust, and each armature block The block core is provided with teeth that are integer multiples of the number of phases arranged at equal pitches and armature coils that are concentratedly wound around the teeth, and the magnetic pole pitch is divided by the number of armature blocks between the armature blocks. A gap corresponding to an electrical angle that is an integral multiple of the value is provided, and the armature coils of each armature block are wound with a phase shifted by an electrical angle corresponding to the gap between the armature blocks. Features a linear motor.

The number of blocks of the armature is an integer multiple of 3, a gap having a size of 2/3 of the magnetic pole pitch is provided between the armature blocks, and 3 × a (a = integer) blocks are provided in the block core of each armature block. Teeth are provided at an equal pitch, the number of field magnetic poles per armature block is 2 × a (a = integer) and arranged at an equal pitch, a U-phase coil is attached to all of the teeth of the block core of the first armature block, The armature coils are wound in the order of the V-phase coil and the W-phase coil, and the armature coils are wound in the order of the V-phase coil, the W-phase coil and the U-phase coil in all the teeth of the block core of the second armature block. The armature coils are wound around all the teeth of the block core of the third armature block in the order of W-phase coil, U-phase coil, and V-phase coil. If the number of armature blocks exceeds 3, the above coil arrangement is used. Repeat The linear motor according to claim 1, wherein each phase coil of each armature block is three-phase balanced.

The number of blocks of the armature is an integer multiple of 3, a gap having a size of 1/3 of the magnetic pole pitch is provided between the armature blocks, and 3 × a (a = integer) block cores of each armature block Teeth are provided at an equal pitch, the number of field magnetic poles per armature block is 2 × a (a = integer) and arranged at an equal pitch, a U-phase coil is attached to all of the teeth of the block core of the first armature block, The armature coils are wound in the order of the V-phase coil and the W-phase coil, and all the teeth of the block core of the second armature block are reversed in the winding direction from the first armature block. The armature coil is wound in the order of the phase coil and the V-phase coil, and the armature coil is wound in the order of the V-phase coil, the W-phase coil, and the U-phase coil in all the teeth of the block core of the third armature block. Number of armature blocks The linear motor according to claim 1, wherein when the number exceeds 3, the coil arrangement is repeated, and each phase coil of each armature block is three-phase balanced.

Three armature blocks are used, the length in the thrust direction of each armature block is 10 times the field magnetic pole pitch, and nine teeth are provided at equal pitches on the block core of each armature block. A gap having a size of 2/3 of the pitch is provided between the armature blocks and arranged in the thrust direction. The block core teeth of each armature block are grouped in groups of three, and the block core of the first armature block An armature coil is wound around the teeth group in the order of the U-phase coil, W-phase coil, and V-phase coil, and the order of the V-phase coil, U-phase coil, and W-phase coil is placed in the tooth group of the block core of the second armature block. The armature coil is wound in the armature coil in the order of the W-phase coil, the V-phase coil, and the U-phase coil in the tooth group of the block core of the third armature block. Linear motor according to claim 1, characterized in that 3-phase balanced connection by arranging a coil with a phase difference of 120 °.

Three armature blocks are used, the length in the thrust direction of each armature block is 10 times the field magnetic pole pitch, and nine teeth are provided at equal pitches on the block core of each armature block. A gap having a dimension of 1/3 of the pitch is provided between the armature blocks and arranged in the thrust direction. The block core teeth of each armature block are grouped in groups of three, and the block core of the first armature block The armature coil is wound around the teeth group in the order of the U-phase coil, W-phase coil, and V-phase coil, and the winding direction of the first armature block is reversed to the tooth group of the block core of the second armature block. The armature coils are wound in the order of W-phase coil, V-phase coil, and U-phase coil, and the same as the first armature block in the tooth group of the block core of the third armature block The armature coil is wound in the order of the V-phase coil, the U-phase coil, and the W-phase coil in the direction, and the armature coils are arranged with a phase difference of 60 ° to form a three-phase balanced connection. Linear motor.

Using two armature blocks, the length of each armature block in the thrust direction is 10 times the field magnetic pole pitch, and nine teeth are provided at equal pitches on the block core of each armature flock. A gap having a size of 1/2 of the pitch is provided between the armature blocks and arranged in the thrust direction, and the teeth of the block cores of each armature block are grouped in groups of three, and the block core of the first armature block An armature coil is wound around the teeth group in the order of the U-phase coil, the W-phase coil, and the V-phase coil, and the first and second teeth of the block core teeth group of the second armature block are respectively W-phase coils. The third, fourth, and fifth teeth are in the order of the V-phase coil, the sixth, seventh, and eighth teeth are the U-phase coil, and the ninth tooth is the W-phase coil. coil Entrainment, the linear motor according to claim 1, wherein the armature coils, characterized in that the 3-phase balanced connection and arranged with a phase difference of 90 °.

Using two armature blocks, the length in the thrust direction of each armature block is 10 times the field magnetic pole pitch, and nine teeth are provided at equal pitches on the block core of each armature block. A gap having a size of 1/2 of the pitch is provided between the armature blocks and arranged in the thrust direction, and the teeth of the block cores of each armature block are grouped in groups of three, and the block core of the first armature block An armature coil is wound around the teeth group in the order of the U-phase coil, W-phase coil, and V-phase coil, and the order of the V-phase coil, U-phase coil, and W-phase coil is placed in the tooth group of the block core of the second armature block. 2. The linear motor according to claim 1, wherein the armature coil is wound on and the armature coils are arranged with a phase difference of 90 [deg.] And three-phase balanced connection is made.

Using 2 × c (c = integer) armature blocks, the length in the thrust direction of each armature block is 10 times the field magnetic pole pitch, and 12 teeth are provided in the block core of each armature block. Are arranged at equal pitches, a gap having a size of 1/2 of the magnetic pole pitch is provided between the armature blocks and arranged in the thrust direction, and the block core teeth of each armature block are grouped in groups of three. The armature coil is wound around the tooth group of the block core of the armature block in the order of the forward wound U-phase coil, the forward wound V-phase coil, the reverse wound u-phase coil, and the reverse wound v-phase coil. The armature coil is wound around the tooth group of the block core of the armature block in the order of the forward winding V-phase coil, the reverse winding u-phase coil, the reverse winding v-phase coil, and the forward winding U-phase coil. Linear motor according to claim 1, wherein if the number of child blocks exceeds 2, characterized in that a 2-phase connection entrainment armature coils repeat the above.

Using 2 × d (d = integer) armature blocks, the length in the thrust direction of each armature block is 10 times the field magnetic pole pitch, and 12 teeth are provided in the block core of each armature block. Are arranged at equal pitches, a gap having a size of 1/2 of the magnetic pole pitch is provided between the armature blocks and arranged in the thrust direction, and the block core teeth of each armature block are grouped into two groups, and the first To the tooth group of the block core of the armature block, forward direction winding U phase coil, reverse direction winding v phase coil, forward direction winding W phase coil, reverse direction winding u phase coil, forward direction winding V phase coil, reverse direction winding w The armature coils are wound in the order of the phase coils, and the forward-winding V-phase coil, the forward-winding W-phase coil, the reverse-winding u-phase coil, the forward-winding are wound around the tooth group of the block core of the second armature block. If the armature coil is wound in the order of phase coil, reverse winding w-phase coil, forward winding U-phase coil, reverse winding v-phase coil, and the number of armature blocks exceeds 2, the above is repeated. The linear motor according to claim 1, wherein the winding is a three-phase winding.

Using 3 × e (e = integer) armature blocks, the length of each armature block in the thrust direction is 10 times the field magnetic pole pitch, and 12 teeth are provided in the block core of each armature block. Are provided at equal pitches, a gap having a size of 2/3 of the magnetic pole pitch is provided between the armature blocks and arranged in the thrust direction, and the teeth of the block cores of each armature block are grouped in groups of three. The armature coil is wound around the tooth group of the block core of the armature block in the order of the forward wound U-phase coil, the forward wound V-phase coil, the reverse wound u-phase coil, and the reverse wound v-phase coil. The tooth group of the block core of the armature block includes the reverse winding u-phase coil, the reverse winding v-phase coil, the forward winding U-phase coil, the reverse winding v-phase coil, and the reverse winding u-phase coil in this order. A coil is wound, and a reverse-winding v-phase coil, a forward-winding U-phase coil, a reverse-winding v-phase coil, a forward-winding U-phase coil, a forward-winding V-phase are wound on the tooth group of the block core of the third armature block 2. The linear motor according to claim 1, wherein the armature coils are wound in the order of the coils, and when the number of armature blocks exceeds 3, the above is repeated and the armature coils are wound to form a two-phase connection.

Using 3 × f (f = integer) armature blocks, the length in the thrust direction of each armature block is 10 times the field magnetic pole pitch, and 12 teeth are provided in the block core of each armature block. Are provided at equal pitches, a gap having a size of 2/3 of the magnetic pole pitch is provided between the armature blocks, arranged in the thrust direction, and the teeth of the block cores of each armature block are grouped into two groups. To the tooth group of the block core of the armature block, forward direction winding U phase coil, reverse direction winding v phase coil, forward direction winding W phase coil, reverse direction winding u phase coil, forward direction winding V phase coil, reverse direction winding w The armature coils are wound in the order of the phase coils, and the forward winding V-phase coil, reverse winding w-phase coil, forward winding U-phase coil, and reverse winding are performed on the block core teeth group of the second armature block. An armature coil is wound in the order of a phase coil, a forward-winding W-phase coil, and a reverse-winding u-phase coil, and a forward-winding W-phase coil and a reverse-winding u-phase are wound on the tooth group of the block core of the third armature block. When armature coils are wound in the order of coil, forward-winding V-phase coil, reverse-winding w-phase coil, forward-winding U-phase coil, reverse-winding v-phase coil, and the number of armature blocks exceeds 3, The linear motor according to claim 1, wherein the armature coil is repeatedly wound to form a three-phase connection.

Using 3 × g (g = integer) armature blocks, the length of each armature block in the thrust direction is 10 times the field magnetic pole pitch, and 12 teeth are provided in the block core of each armature block. Are arranged at equal pitches, a gap having a size of 1/3 of the magnetic pole pitch is provided between the armature blocks and arranged in the thrust direction, and the teeth of the block cores of each armature block are grouped in groups of three. The armature coil is wound around the tooth group of the block core of the armature block in the order of the forward wound U-phase coil, the forward wound V-phase coil, the reverse wound u-phase coil, and the reverse wound v-phase coil. In the tooth group of the block core of the armature block, the forward direction V-phase coil, the forward direction U-phase coil, the forward direction V-phase coil, the reverse direction u-phase coil, and the reverse direction v-phase coil A coil is wound, and a reverse-winding u-phase coil, a reverse-winding v-phase coil, a forward-winding U-phase coil, a forward-winding V-phase coil, a reverse-winding u-phase are wound on a tooth group of the block core of the third armature block 2. The linear motor according to claim 1, wherein the armature coils are wound in the order of the coils, and when the number of armature blocks exceeds 3, the above is repeated and the armature coils are wound to form a two-phase connection.

Using 3 × h (h = integer) armature blocks, the length in the thrust direction of each armature block is 10 times the field magnetic pole pitch, and 12 teeth are provided in the block core of each armature block. Are arranged at equal pitches, a gap having a size of 1/3 of the magnetic pole pitch is provided between the armature blocks, arranged in the thrust direction, and the teeth of the block cores of each armature block are grouped into two groups. To the tooth group of the block core of the armature block, forward direction winding U phase coil, reverse direction winding v phase coil, forward direction winding W phase coil, reverse direction winding u phase coil, forward direction winding V phase coil, reverse direction winding w The armature coils are wound in the order of the phase coils, and the reverse-wound w-phase coil, the forward-winding U-phase coil, the reverse-winding v-phase coil and the forward-winding are wound on the tooth group of the block core of the second armature block. The armature coils are wound in the order of the phase coil, the reverse-winding u-phase coil, and the forward-winding V-phase coil, and the forward-winding V-phase coil and the reverse-winding w-phase are wound on the tooth group of the block core of the third armature block. If the armature coil is wound in the order of the coil, forward wound U phase coil, reverse wound v phase coil, forward wound W phase coil, reverse wound u phase coil and the number of armature blocks exceeds 3, the above The linear motor according to claim 1, wherein the armature coil is repeatedly wound to form a three-phase connection.

A block core constituting the armature block includes a yoke portion having an engaging portion formed so as to be fitted to the engaging protrusion on the opposite side to the engaging protrusion formed on one side, and each armature The field magnetic poles are arranged so as to sandwich the longitudinal direction of a block core row formed by core segments formed of teeth wound around a coil and sequentially connecting the core segments from both sides. The linear motor of any one of 1-13.

The block core that constitutes the armature block is a block core in which a plurality of T-shaped core segments in which a lower end portion forms a tooth portion and an upper end portion forms a yoke portion are connected to each other by the yoke portion. The linear motor according to claim 1, wherein the linear motor is provided.

16. The space between the armature blocks, a space between the yoke portions of the block core is supported by a spacing piece made of a magnetic material, and a temperature sensor is molded and supported in a space above the spacing piece. The linear motor of any one of Claims.

The linear motor according to any one of claims 1 to 16, wherein the armature block is inclined at a predetermined angle in a direction orthogonal to the thrust direction of the armature block.

When three armature blocks are used, the thickness of the armature block is W, and the magnetic pole pitch is Pm, the inclination angle θ of the three armature blocks is θ = sin ⁻¹ (Pm / 3W)
The linear motor according to claim 1, wherein the linear motor is configured as described above.

When two armature blocks are used, the thickness of the armature block is W, and the magnetic pole pitch is Pm, the inclination angle θ of the two armature blocks is θ = sin ⁻¹ (Pm / 2W)
The linear motor according to claim 1, wherein the linear motor is configured as described above.