JP2003304657A - Permanent magnet type synchronous motor - Google Patents
Permanent magnet type synchronous motorInfo
- Publication number
- JP2003304657A JP2003304657A JP2002108752A JP2002108752A JP2003304657A JP 2003304657 A JP2003304657 A JP 2003304657A JP 2002108752 A JP2002108752 A JP 2002108752A JP 2002108752 A JP2002108752 A JP 2002108752A JP 2003304657 A JP2003304657 A JP 2003304657A
- Authority
- JP
- Japan
- Prior art keywords
- permanent magnet
- synchronous motor
- type synchronous
- magnet type
- stator core
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
Landscapes
- Iron Core Of Rotating Electric Machines (AREA)
- Permanent Magnet Type Synchronous Machine (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、永久磁石式同期モ
ータに関するものである。更に詳細には、例えば、固定
子鉄心を分割することなく一体に成形し、鉄心歯部に巻
線を直巻きする集中巻方式で、３０００ｍｉｎ-1以上の
高速回転で使用される永久磁石式同期モータ（以下「Ｐ
Ｍモータ」と称する）において、磁石内に発生する渦電
流を低減するように工夫したものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a permanent magnet type synchronous motor. More particularly, for example, integrally molded without dividing the stator core, a concentrated winding method for winding a winding core teeth straight, permanent magnet synchronous to be used in high-speed rotation than 3000 min -1 Motor (hereinafter "P
(Hereinafter referred to as "M motor"), it is devised so as to reduce the eddy current generated in the magnet.
【０００２】[0002]
【従来の技術】固定子鉄心を分割することなく固定子を
一体に成形し、鉄心歯部に巻線を直巻きする集中巻方式
のＰＭモータでは、一般に、ノズル式の巻線機により巻
線が施される。巻線機により巻線を行なうにはスロット
開口幅を少なくともノズルの通る寸法以上とする必要が
あり、開口幅が広くなる傾向にある。また、電気自動車
用などでは、モータ回転速度が３０００ｍｉｎ-1以上の
高速回転でＰＭモータが使用されることになる。2. Description of the Related Art In a concentrated winding type PM motor in which a stator is integrally molded without splitting the stator core and windings are directly wound around the teeth of the core, winding is generally performed by a nozzle type winding machine. Is applied. In order to perform winding with a winding machine, the slot opening width needs to be at least equal to or larger than the size through which the nozzle passes, and the opening width tends to be widened. In addition, for electric vehicles and the like, the PM motor is used at a high rotation speed of 3000 min −1 or more.
【０００３】このような場合、ギャップパーミアンスの
変動や電機子反作用高調波起磁力の影響により、ＰＭモ
ータの永久磁石内部に渦電流が流れ、磁石が異常発熱す
ることがある。渦電流は変動磁束の大きさ及びその周波
数の二乗に比例するため、スロット開口幅が広いほど、
高速回転になるほど影響が大きくなり、場合によっては
磁石が熱減磁を起こす恐れがある。In such a case, an eddy current may flow inside the permanent magnet of the PM motor due to the fluctuation of the gap permeance and the influence of the armature reaction higher harmonic magnetomotive force, and the magnet may abnormally generate heat. Since the eddy current is proportional to the magnitude of the fluctuating magnetic flux and the square of its frequency, the wider the slot opening width,
The higher the rotation speed, the greater the influence, and in some cases the magnet may be thermally demagnetized.
【０００４】この対策として、１極分の永久磁石を（Ｐ
Ｍモータに備えた各永久磁石をそれぞれ）軸方向あるい
は周方向に複数個に分割し、分割した磁石片（分割永久
磁石）のそれぞれを電気的に絶縁して１極分の磁石（磁
極）として用いる方法が知られている。図４（ａ）は軸
方向に分割した１極分の磁石を示し、図４（ｂ）は周方
向に分割した１極分の磁石を示す。As a countermeasure against this, a permanent magnet for one pole (P
Each permanent magnet included in the M motor is divided into a plurality in the axial direction or the circumferential direction, and each of the divided magnet pieces (divided permanent magnets) is electrically insulated to form one pole magnet (magnetic pole). The method used is known. 4A shows a magnet for one pole divided in the axial direction, and FIG. 4B shows a magnet for one pole divided in the circumferential direction.
【０００５】ＰＭモータの永久磁石の渦電流損は、永久
磁石の分割数にほぼ反比例して減少するので、分割数が
多いほど渦電流損を低減することができる。図５は、永
久磁石の分割数と渦電流との関係を示す。この図より、
永久磁石を分割することが、渦電流損の低減に有効であ
ることがわかる。Since the eddy current loss of the permanent magnet of the PM motor decreases almost in inverse proportion to the number of divisions of the permanent magnet, the eddy current loss can be reduced as the number of divisions increases. FIG. 5 shows the relationship between the number of divisions of the permanent magnet and the eddy current. From this figure,
It can be seen that dividing the permanent magnet is effective in reducing the eddy current loss.
【０００６】[0006]
【発明が解決しようとする課題】しかし、分割数が多い
ほど永久磁石の製造コスト、永久磁石の組み付け工数な
どが増加する問題がある。However, there is a problem that the manufacturing cost of the permanent magnet, the number of assembling steps of the permanent magnet, and the like increase as the number of divisions increases.
【０００７】本発明は、上記従来記述に鑑み、渦電流損
の評価方法を検討し、渦電流損を実用上問題ないレベル
に抑え、安価となるＰＭモータを提供することを目的と
する。In view of the above description, it is an object of the present invention to provide a PM motor which is inexpensive and which suppresses the eddy current loss to a level that poses no practical problem.
【０００８】[0008]
【課題を解決するための手段】上記課題を解決する本発
明の構成は、回転子鉄心に永久磁石を備え、固定子鉄心
に巻線を備えた永久磁石式同期モータにおいて、回転子
を回転させたときに、永久磁石の周方向に関する中央部
における磁束密度の変動主成分の振幅とこの変動主成分
の周波数と前記永久磁石の断面積とが（２）式を満足す
る構造になっていることを特徴とする。SUMMARY OF THE INVENTION The structure of the present invention for solving the above problems is to rotate a rotor in a permanent magnet type synchronous motor having a rotor core with permanent magnets and a stator core with windings. In this case, the amplitude of the fluctuation main component of the magnetic flux density in the central portion of the permanent magnet in the circumferential direction, the frequency of the fluctuation main component, and the cross-sectional area of the permanent magnet have a structure satisfying the expression (2). Is characterized by.
【０００９】[0009]
【数５】 [Equation 5]
【００１０】また本発明の構成は、回転子鉄心に永久磁
石を備え、固定子鉄心に巻線を備えた永久磁石式同期モ
ータにおいて、前記固定子鉄心に形成したスロットの開
口幅を調整して、（４）式を満足させる構造になってい
ると共に、前記開口幅は最少でも巻線機のノズルが通る
幅以上になっていることを特徴とする。According to the structure of the present invention, in a permanent magnet type synchronous motor having a rotor core provided with permanent magnets and a stator core provided with windings, the opening width of slots formed in the stator core is adjusted. , (4) is satisfied, and the opening width is at least the width through which the nozzle of the winding machine passes.
【００１１】[0011]
【数６】 [Equation 6]
【００１２】また本発明の構成は、回転子鉄心に永久磁
石を備え、固定子鉄心に巻線を備えた永久磁石式同期モ
ータにおいて、１極当たりの永久磁石をｎ分割し、ｎ個
に分割した分割永久磁石により１極分の磁極を構成する
と共に、（６）式を満足する最少のｎを採用しているこ
とを特徴とする。Further, according to the structure of the present invention, in the permanent magnet type synchronous motor having the permanent magnets in the rotor core and the windings in the stator core, the permanent magnet per pole is divided into n and divided into n pieces. It is characterized in that a magnetic pole for one pole is constituted by the divided permanent magnets and the minimum n that satisfies the expression (6) is adopted.
【００１３】[0013]
【数７】 [Equation 7]
【００１４】また本発明の構成は、回転子鉄心に永久磁
石を備え、固定子鉄心に巻線を備えており、前記永久磁
石の変動磁束成分が電流値に大きく影響を受ける永久磁
石式同期モータにおいて、（７）式を満足させるような
電流値以下で使用するようにしたことを特徴とする。Further, according to the structure of the present invention, the rotor core is provided with the permanent magnets, the stator core is provided with the windings, and the fluctuating magnetic flux component of the permanent magnets is greatly affected by the current value. In the above, it is characterized in that it is used at a current value equal to or less than that which satisfies the expression (7).
【００１５】[0015]
【数８】 [Equation 8]
【００１６】また本発明の構成は、前記固定子鉄心は分
割することなく一体に成形されており、固定子鉄心の歯
部に巻線を直巻きする集中巻方式を採用していることを
特徴とする。Further, the structure of the present invention is characterized in that the stator core is integrally formed without being divided, and a concentrated winding system is adopted in which the winding is directly wound around the teeth of the stator core. And
【００１７】また本発明の構成は、回転速度が３０００
min -1以上となる電気自動車用のモータとして使用され
ることを特徴とする。Further, in the structure of the present invention, the rotation speed is 3000.
It is characterized by being used as a motor for an electric vehicle with a min -1 or more.
【００１８】[0018]
【発明の実施の形態】以下に本発明の実施の形態を図面
に基づき詳細に説明する。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the drawings.
【００１９】まず、永久磁石内の渦電流の発生メカニズ
ムを検討し、評価方法を求める。図１は集中巻方式の表
面磁石形ＰＭモータ（以下「ＳＰＭ」と略称する）の構
造例で、１２コイル／８極の例である。図１に示すよう
に、回転子鉄心１の周面（表面）に永久磁石２が備えら
れており、固定子３には集中巻方式の巻線４が備えられ
ている。First, the generation mechanism of the eddy current in the permanent magnet is examined and the evaluation method is obtained. FIG. 1 is a structural example of a concentrated winding type surface magnet type PM motor (hereinafter abbreviated as “SPM”), which is an example of 12 coils / 8 poles. As shown in FIG. 1, a permanent magnet 2 is provided on the peripheral surface (surface) of a rotor core 1, and a stator 3 is provided with a concentrated winding type winding 4.
【００２０】いま、１極の永久磁石２の中央（周方向に
関しての永久磁石２の中央）にＡ点を取り、図１の位置
から回転子鉄心１が時計方向に３０°（電気角１２０
°）回転した場合のＡ点での磁束密度の変化を調べる
と、図２のようになる。Ａ点の磁束密度は回転子鉄心１
の回転位置により変動することになる。すなわち、Ａ点
が、固定子鉄心３の鉄心歯部と対向する場合と、固定子
鉄心３のスロット開口部と対向する場合とで、ギャップ
のパーミアンスが異なるため、永久磁石２の磁束が変化
することになる。Now, a point A is set at the center of the one-pole permanent magnet 2 (the center of the permanent magnet 2 in the circumferential direction), and the rotor core 1 is rotated clockwise from the position of FIG. 1 by 30 ° (electrical angle 120).
°) When the change of the magnetic flux density at point A when rotated is examined, it becomes as shown in FIG. Magnetic flux density at point A is rotor core 1
Will vary depending on the rotational position of. That is, since the permeance of the gap is different between the case where the point A faces the core tooth portion of the stator core 3 and the case where the point A faces the slot opening of the stator core 3, the magnetic flux of the permanent magnet 2 changes. It will be.
【００２１】このような状態で、希土類磁石などの電気
抵抗の比較的小さな永久磁石２を使用すると、電磁誘導
の法則に従って、永久磁石２内に磁束の変化を打ち消す
ような渦電流が流れることになる。渦電流は磁束変動の
大きさ及び周波数の二乗に比例するので、磁束の変動が
少なくても高速回転になれば大きな渦電流損が生じる。When a permanent magnet 2 having a relatively small electric resistance such as a rare earth magnet is used in such a state, an eddy current that cancels a change in magnetic flux flows in the permanent magnet 2 according to the law of electromagnetic induction. Become. Since the eddy current is proportional to the magnitude of the magnetic flux fluctuation and the square of the frequency, even if the fluctuation of the magnetic flux is small, a large eddy current loss occurs at high speed rotation.
【００２２】図１の場合では、３スロットで２極分とな
ることから、磁束変動の主成分の周波数は電源周波数の
３倍となる。この脈動周波数は、スロット数と極数の取
り方により決定される。また、変動磁束の大きさは、ス
ロット開口幅、ギャップ長、電機子反作用の大きさに影
響される。なお、図１はＳＰＭの例であるが、埋込磁石
形（以下（ＩＰＭ）と略称する）においても同様に考え
ることができる。In the case of FIG. 1, since there are two poles in three slots, the frequency of the main component of the magnetic flux fluctuation is three times the power supply frequency. This pulsation frequency is determined by the number of slots and the number of poles. Further, the magnitude of the fluctuating magnetic flux is influenced by the slot opening width, the gap length, and the magnitude of the armature reaction. Although FIG. 1 shows an example of the SPM, the same can be considered for an embedded magnet type (hereinafter abbreviated as (IPM)).
【００２３】磁石に発生する渦電流損は、磁束変動の大
きさφｈ及びその周波数ｆｈの二乗に比例し、単位面積
当りの損失が大きいほど、磁石の発熱が大きくなると考
えることができる。そこで、渦電流損の評価式として
（１）式を定義する。The eddy current loss generated in the magnet is proportional to the magnitude φh of the magnetic flux fluctuation and the square of its frequency fh, and it can be considered that the larger the loss per unit area, the greater the heat generation of the magnet. Therefore, the expression (1) is defined as the evaluation expression of the eddy current loss.
【００２４】[0024]
【数９】 [Equation 9]
【００２５】ここで、種々のモータＡ〜Ｅにつき、温度
試験を実施して、（１）式で示す渦電流評価値Ｗedy の
値と磁石の異常発熱との関係を調べた結果をまとめる
と、表１のようになる。Here, the results of examining the relationship between the value of the eddy current evaluation value Wedy shown by the equation (1) and the abnormal heat generation of the magnet by carrying out a temperature test on the various motors A to E are summarized as follows. It becomes like Table 1.
【００２６】[0026]
【表１】 [Table 1]
【００２７】表１より、（１）式に示す渦電流評価値Ｗ
edy の値が３．５を越えると磁石の発熱上問題となり、
３．４以下であれば問題ないことがわかる。そこで、
（２）式となるように設計すれば、渦電流損による発熱
を抑えたＰＭモータができることになる。From Table 1, eddy current evaluation value W shown in equation (1)
If the value of edy exceeds 3.5, it will cause a problem in heat generation of the magnet,
It can be seen that there is no problem if it is 3.4 or less. Therefore,
If the design is made so as to satisfy the formula (2), it is possible to provide a PM motor that suppresses heat generation due to eddy current loss.
【００２８】[0028]
【数１０】 [Equation 10]
【００２９】＜第１の実施例＞図１は第１の実施例にか
かる集中巻方式の表面磁石形ＰＭモータ（以下「ＳＰ
Ｍ」と略称する）の構造例で、１２コイル／８極の例で
ある。図１に示すように、回転子鉄心１の周面（表面）
に永久磁石２が備えられており、固定子３には集中巻方
式の巻線４が備えられている。回転子鉄心１は分割する
ことなく一体に成形されている。<First Embodiment> FIG. 1 shows a concentrated magnet type surface magnet type PM motor according to the first embodiment (hereinafter referred to as "SP").
(Abbreviated as “M”), which is an example of 12 coils / 8 poles. As shown in FIG. 1, the peripheral surface (front surface) of the rotor core 1
Is provided with a permanent magnet 2, and the stator 3 is provided with a concentrated winding type winding 4. The rotor core 1 is integrally formed without being divided.
【００３０】第１の実施例のＰＭモータでは、回転子鉄
心１を回転させたときに、永久磁石２の中央部（周方向
に関しての中央部）における磁束密度の変動主成分の振
幅とこの変動主成分の周波数と永久磁石２の断面積（磁
束が透過していく面積）が（３）式を満足するように構
成している。このような構成としているため、渦電流損
による発熱を抑えることができる。In the PM motor of the first embodiment, when the rotor core 1 is rotated, the fluctuation of the magnetic flux density in the central portion (the central portion in the circumferential direction) of the permanent magnet 2 and the fluctuation of the main component and this fluctuation. The frequency of the main component and the cross-sectional area of the permanent magnet 2 (the area through which the magnetic flux penetrates) satisfy the equation (3). With such a configuration, heat generation due to eddy current loss can be suppressed.
【００３１】[0031]
【数１１】 [Equation 11]
【００３２】＜第２の実施例＞（２）式のＢｈはスロッ
トの開口幅に大きく影響を受ける。したがって、スロッ
ト数／極数、磁石寸法が決定している場合にはスロット
の開口幅を調整して（２）式を満足させることができ
る。<Second Embodiment> Bh in the expression (2) is greatly affected by the opening width of the slot. Therefore, when the number of slots / the number of poles and the magnet size are determined, the opening width of the slots can be adjusted to satisfy the expression (2).
【００３３】図３は、同一のスロット数／極数、磁石寸
法のモータにおいて、スロット開口幅／スロットピッチ
を変化させた場合の磁束変動成分の変化の様子（一例）
を示す。変動磁束成分の大きさはスロット開口幅にほぼ
比例して増減するので、第２の実施例のＰＭモータで
は、スロット開口幅を調整して、（４）式を満足させる
ＰＭモータの構造とした。ただし、この場合のスロット
開口幅は巻線機のノズルが通る幅以上としている。FIG. 3 shows how the magnetic flux fluctuation component changes when the slot opening width / slot pitch is changed in a motor having the same number of slots / number of poles and magnet size (one example).
Indicates. Since the magnitude of the fluctuating magnetic flux component increases and decreases substantially in proportion to the slot opening width, in the PM motor of the second embodiment, the slot opening width is adjusted to make the PM motor structure satisfying the expression (4). . However, the slot opening width in this case is set to be larger than the width through which the nozzle of the winding machine passes.
【００３４】[0034]
【数１２】 [Equation 12]
【００３５】＜第３の実施例＞１極当りの磁石の総面積
をＳmax とすれば、これをｎ分割（但しｎは整数）した
場合の1 個当たりの面積Ｓｍは、（５）式のようにな
る。（２）式より、渦電流評価値はＳｍに比例するの
で、ｎ数が多いほど渦電流評価値は小となる。しかし、
ｎが多くなるほどコストアップになることから、第３の
実施例のＰＭモータでは、（６）式を満足する最少のｎ
を採用したＰＭモータの構造とした。<Third Embodiment> If the total area of magnets per pole is Smax, the area Sm per magnet when this is divided into n (where n is an integer) is given by the equation (5). Like Since the eddy current evaluation value is proportional to Sm from the equation (2), the larger the n number, the smaller the eddy current evaluation value. But,
Since the cost increases as n increases, in the PM motor of the third embodiment, the minimum n satisfying the expression (6) is satisfied.
Is adopted as the structure of the PM motor.
【００３６】[0036]
【数１３】 [Equation 13]
【００３７】＜第４の実施例＞（２）式のＢｈは電流値
（電機子反作用）によっても大きく影響を受ける。した
がって、スロット開口幅、スロット数／極数、磁石寸法
などが決定している場合には電流値に制限を設けて、渦
電流損を抑えることができる。この場合、変動磁束が電
流Ｉの関数となることから、第４の実施例のＰＭモータ
では、（７）式を満足させるような変動磁束となる電流
値以下で使用するようにしたＰＭモータの構造とした。<Fourth Embodiment> Bh in the equation (2) is greatly affected by the current value (armature reaction). Therefore, when the slot opening width, the number of slots / the number of poles, the magnet size, etc. are determined, the current value can be limited to suppress the eddy current loss. In this case, since the fluctuating magnetic flux is a function of the current I, in the PM motor of the fourth embodiment, the PM motor of the PM motor used at a current value equal to or lower than the fluctuating magnetic flux satisfying the expression (7) is used. With the structure.
【００３８】[0038]
【数１４】 [Equation 14]
【００３９】[0039]
【発明の効果】以上、実施の形態および実施例と共に具
体的に説明したように、本発明では、渦電流損の評価を
することにより最適な構造となる永久磁石式同期モータ
を構成したので、次のような効果を奏することができ
る。As described above in detail with the embodiments and examples, in the present invention, since the permanent magnet type synchronous motor having the optimum structure is constructed by evaluating the eddy current loss, The following effects can be achieved.
【００４０】（１）渦電流損による磁石の異常発熱を防
止することができ、信頼性が向上する。
（２）渦電流防止策が安価に実現できる。
（３）磁石の発熱が少なくなるので、高耐熱の磁石を使
用しなくてもよくなる。耐熱性の低い磁石ほど磁束密度
が高いので、モータの小型化が可能となる。(1) Abnormal heat generation of the magnet due to eddy current loss can be prevented, and reliability is improved. (2) The eddy current prevention measure can be realized at low cost. (3) Since the heat generated by the magnet is reduced, it is not necessary to use a high heat resistant magnet. Since the magnet having lower heat resistance has a higher magnetic flux density, the motor can be downsized.
【図１】本発明の実施例にかかる永久磁石同期モータを
示す構成図。FIG. 1 is a configuration diagram showing a permanent magnet synchronous motor according to an embodiment of the present invention.
【図２】磁石中央部の磁束密度変動を示す特性図。FIG. 2 is a characteristic diagram showing variations in magnetic flux density in the central portion of the magnet.
【図３】スロット開口幅／スロットピッチと変動磁束成
分との関係を示す特性図。FIG. 3 is a characteristic diagram showing a relationship between a slot opening width / slot pitch and a fluctuating magnetic flux component.
【図４】分割した永久磁石の例を示す斜視図。FIG. 4 is a perspective view showing an example of a divided permanent magnet.
【図５】永久磁石の分割が渦電流損に及ぼす影響を示す
特性図。FIG. 5 is a characteristic diagram showing the effect of division of a permanent magnet on eddy current loss.
１ 回転子鉄心 ２ 永久磁石 ３ 固定子鉄心 ４ 巻線 1 rotor core 2 permanent magnet 3 Stator core 4 windings
Claims (6)
心に巻線を備えた永久磁石式同期モータにおいて、 回転子を回転させたときに、永久磁石の周方向に関する
中央部における磁束密度の変動主成分の振幅とこの変動
主成分の周波数と前記永久磁石の断面積とが（２）式を
満足する構造になっていることを特徴とする永久磁石式
同期モータ。 【数１】 1. A permanent magnet type synchronous motor having a rotor core provided with permanent magnets and a stator core provided with windings. When the rotor is rotated, the magnetic flux density in the central portion in the circumferential direction of the permanent magnets. The permanent magnet synchronous motor is characterized in that the amplitude of the fluctuation main component, the frequency of the fluctuation main component, and the cross-sectional area of the permanent magnet satisfy the formula (2). [Equation 1]
心に巻線を備えた永久磁石式同期モータにおいて、 前記固定子鉄心に形成したスロットの開口幅を調整し
て、（４）式を満足させる構造になっていると共に、前
記開口幅は最少でも巻線機のノズルが通る幅以上になっ
ていることを特徴とする永久磁石式同期モータ。 【数２】 2. A permanent magnet type synchronous motor having a rotor core provided with permanent magnets and a stator core provided with windings, wherein the opening width of a slot formed in the stator core is adjusted to obtain the formula (4). The permanent magnet synchronous motor is characterized in that the opening width is at least the width through which the nozzle of the winding machine passes. [Equation 2]
心に巻線を備えた永久磁石式同期モータにおいて、 １極当たりの永久磁石をｎ分割し、ｎ個に分割した分割
永久磁石により１極分の磁極を構成すると共に、（６）
式を満足する最少のｎを採用していることを特徴とする
永久磁石式同期モータ。 【数３】 3. A permanent magnet type synchronous motor having a rotor core provided with permanent magnets and a stator core provided with windings, wherein the permanent magnet per pole is divided into n, and the divided permanent magnets are divided into n pieces. A magnetic pole for one pole is formed, and (6)
A permanent magnet synchronous motor characterized by adopting a minimum n that satisfies the formula. [Equation 3]
心に巻線を備えており、前記永久磁石の変動磁束成分が
電流値に大きく影響を受ける永久磁石式同期モータにお
いて、 （７）式を満足させるような電流値以下で使用するよう
にしたことを特徴とする永久磁石式同期モータ。 【数４】 4. A permanent magnet type synchronous motor in which a rotor iron core is provided with a permanent magnet and a stator iron core is provided with windings, and a fluctuating magnetic flux component of the permanent magnet is greatly affected by a current value. A permanent magnet type synchronous motor characterized by being used below a current value that satisfies the formula. [Equation 4]
いて、 前記固定子鉄心は分割することなく一体に成形されてお
り、固定子鉄心の歯部に巻線を直巻きする集中巻方式を
採用していることを特徴とする永久磁石式同期モータ。5. The concentrated winding according to any one of claims 1 to 4, wherein the stator core is integrally formed without being divided, and a winding is directly wound around a tooth portion of the stator core. Permanent magnet type synchronous motor characterized by adopting the method.
気自動車用のモータとして使用されることを特徴とする
請求項１乃至請求項５の何れか一項の永久磁石式同期モ
ータ。6. The permanent magnet type synchronous motor according to claim 1, wherein the permanent magnet type synchronous motor is used as a motor for an electric vehicle having a rotation speed of 3000 min −1 or more.
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|---|---|---|---|
| JP2002108752A JP2003304657A (en) | 2002-04-11 | 2002-04-11 | Permanent magnet type synchronous motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002108752A JP2003304657A (en) | 2002-04-11 | 2002-04-11 | Permanent magnet type synchronous motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2003304657A true JP2003304657A (en) | 2003-10-24 |
Family
ID=29392405
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006304474A (en) * | 2005-04-20 | 2006-11-02 | Fujitsu General Ltd | Axial air-gap type electric motor |
| JP2010220440A (en) * | 2009-03-18 | 2010-09-30 | Nissan Motor Co Ltd | Permanent magnet type rotary electric machine |
| JP2011188685A (en) * | 2010-03-10 | 2011-09-22 | Mitsubishi Electric Corp | Permanent magnet motor |
| CN103779991A (en) * | 2014-01-16 | 2014-05-07 | 江苏大学 | Parallel type hybrid magnetic material motor |
| CN112152400A (en) * | 2020-09-23 | 2020-12-29 | 沈阳工业大学 | Method for optimizing eddy current loss of permanent magnet |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5472406A (en) * | 1977-11-18 | 1979-06-09 | Meidensha Electric Mfg Co Ltd | Direct current machine |
| JPH1198729A (en) * | 1997-09-18 | 1999-04-09 | Fanuc Ltd | Rotor structure of synchronous motor |
-
2002
- 2002-04-11 JP JP2002108752A patent/JP2003304657A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5472406A (en) * | 1977-11-18 | 1979-06-09 | Meidensha Electric Mfg Co Ltd | Direct current machine |
| JPH1198729A (en) * | 1997-09-18 | 1999-04-09 | Fanuc Ltd | Rotor structure of synchronous motor |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006304474A (en) * | 2005-04-20 | 2006-11-02 | Fujitsu General Ltd | Axial air-gap type electric motor |
| JP4720982B2 (en) * | 2005-04-20 | 2011-07-13 | 株式会社富士通ゼネラル | Axial air gap type electric motor |
| JP2010220440A (en) * | 2009-03-18 | 2010-09-30 | Nissan Motor Co Ltd | Permanent magnet type rotary electric machine |
| JP2011188685A (en) * | 2010-03-10 | 2011-09-22 | Mitsubishi Electric Corp | Permanent magnet motor |
| CN103779991A (en) * | 2014-01-16 | 2014-05-07 | 江苏大学 | Parallel type hybrid magnetic material motor |
| CN112152400A (en) * | 2020-09-23 | 2020-12-29 | 沈阳工业大学 | Method for optimizing eddy current loss of permanent magnet |
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