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JPH06335271A - Synchronous motor - Google Patents

Synchronous motor

Info

Publication number
JPH06335271A
JPH06335271A JP14006093A JP14006093A JPH06335271A JP H06335271 A JPH06335271 A JP H06335271A JP 14006093 A JP14006093 A JP 14006093A JP 14006093 A JP14006093 A JP 14006093A JP H06335271 A JPH06335271 A JP H06335271A
Authority
JP
Japan
Prior art keywords
rotor
winding
stator
windings
cores
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
Application number
JP14006093A
Other languages
Japanese (ja)
Inventor
Satoru Satake
覺 佐竹
Yukio Onoki
幸男 大野木
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Satake Engineering Co Ltd
Original Assignee
Satake Engineering Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Satake Engineering Co Ltd filed Critical Satake Engineering Co Ltd
Priority to JP14006093A priority Critical patent/JPH06335271A/en
Publication of JPH06335271A publication Critical patent/JPH06335271A/en
Pending legal-status Critical Current

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  • Motor And Converter Starters (AREA)
  • Synchronous Machinery (AREA)

Abstract

PURPOSE:To provide a synchronous motor as which can start like an induction motor, has a simplified DC energizing circuit fitted to a stator, and has a brushless structure. CONSTITUTION:Two pairs of stator main coils 7, 8 are provided and each coil is connected to 3-phase AC power supplies R, S, T, the main coils 7, 8 are respectively provided with auxiliary coils 9, 11 and these two auxiliary coils 9, 11 are connected in series through an ON-OFF switch S1 and a DC power supply E. Moreover, a rotor has two rotor cores and respective rotor cores are provided with the first rotor coils 3, 4 and second rotor coils 5, 6, respectively, the first rotor cores 3, 4 of two rotor core are connected in series and the second rotor coils 5, 6 are connected in the star-connection method, allowing connection of diodes D1, D2 between the terminals thereof.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、誘導電動機として自己
起動し、同期運転に切り換える同期電動機に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a synchronous motor which is self-starting as an induction motor and switches to synchronous operation.

【0002】[0002]

【従来の技術】一般の同期電動機は、その回転子を固定
子巻線の作る回転磁界の回転速度すなわち同期速度近く
まで加速する起動機と、回転子巻線を直流励磁するため
のブラシおよび直流電源が必要である。
2. Description of the Related Art A general synchronous motor includes a starter for accelerating its rotor up to a rotational speed of a rotating magnetic field formed by a stator winding, that is, a synchronous speed, and a brush and a DC for exciting the rotor winding by direct current. Power is needed.

【0003】この起動機を省略して同期電動機自体に起
動トルクを持たせるようにしたのが誘導同期電動機であ
る。これは起動時に回転子巻線を短絡して誘導電動機と
して起動するために起動機を必要としないが、同期運転
に必要な回転子巻線の直流励磁のためにブラシを必要と
する。すなわち、回転子の回転速度が同期速度に近づく
と、回転子巻線の短絡を開放して外部の直流電源からブ
ラシを介して回転子巻線に直流電流を流して回転子に磁
極を作り、この磁極が固定子巻線の作る回転磁界に引っ
張られて回転子は同期速度で回転する。しかしながら、
このブラシ付き電動機は保守点検を必要とすることから
保守費が嵩み、ブラシレス構造で自己起動の可能な同期
電動機が望まれている。
An induction synchronous motor is one in which the synchronous motor itself is provided with a starting torque by omitting the starter. This does not require a starter to short-circuit the rotor winding at start-up and start it as an induction motor, but does require a brush for DC excitation of the rotor winding required for synchronous operation. That is, when the rotation speed of the rotor approaches the synchronous speed, the short circuit of the rotor winding is released, and a DC current is passed from the external DC power source to the rotor winding through the brush to form a magnetic pole on the rotor. This magnetic pole is pulled by the rotating magnetic field created by the stator windings, and the rotor rotates at a synchronous speed. However,
Since this brushed electric motor requires maintenance and inspection, the maintenance cost is high, and a synchronous electric motor having a brushless structure and capable of self-starting is desired.

【0004】回転子巻線を有する構造のブラシレス同期
電動機としては、交流励磁機と回転整流器を用いる交流
励磁機付きブラシレス同期電動機があるが、これは回路
構成が複雑で信頼性に欠けるという欠点がある。また回
転子巻線にダイオ−ドを接続してインバ−タの方形波電
圧による高調波磁界を利用するブラシレス自励形三相同
期電動機があるが、これは誘導機始動が不可能で、回転
子の界磁起磁力が不足で十分な出力が得られない欠点が
ある。
As a brushless synchronous motor having a structure having a rotor winding, there is a brushless synchronous motor with an AC exciter using an AC exciter and a rotary rectifier. However, this has a drawback that the circuit configuration is complicated and the reliability is low. is there. There is also a brushless self-excited three-phase synchronous motor that connects a diode to the rotor winding and uses the harmonic magnetic field generated by the square wave voltage of the inverter. There is a drawback that sufficient output cannot be obtained because the field magnetomotive force of the child is insufficient.

【0005】更に前記のインバ−タ駆動のブラシレス同
期電動機において、三相の固定子巻線の一相にダイオ−
ドを挿入して固定子の作る正相分回転磁界に静止磁界を
重畳して、同期速度付近で回転する回転子巻線に静止磁
界による交流電圧を誘起させて、これをダイオ−ドで整
流することによって回転子巻線を直流励磁し、正相分回
転磁界を作用させて同期トルクを発生するブラシレス自
励形三相同期電動機があるが、これも誘導機始動が不可
能なために、回転子鉄心の渦電流による起動となり起動
トルクが小さく、同期トルクも小さいという欠点があ
る。
Further, in the above-mentioned inverter-driven brushless synchronous motor, a diode is connected to one phase of the three-phase stator winding.
The static magnetic field generated by the stator is superposed on the rotating magnetic field for the positive phase to induce an AC voltage due to the static magnetic field in the rotor winding rotating near the synchronous speed, and this is rectified by the diode. By doing so, there is a brushless self-excited three-phase synchronous motor that excites the rotor winding by direct current and applies a rotating magnetic field for the positive phase to generate synchronous torque.However, since this is also impossible to start the induction machine, There is a drawback that the starting torque is small due to the eddy current of the rotor core, and the synchronizing torque is also small.

【0006】本出願人は特開平3年212143号公報
によってこれら従来技術の欠点を解消すべく、複数固定
子構成の誘導同期電動機を開示した。
The applicant of the present application has disclosed an induction synchronous motor having a plurality of stators in order to solve these drawbacks of the prior art in Japanese Patent Laid-Open No. 212143/1993.

【0007】[0007]

【発明が解決しようとする課題】この同期電動機は、同
一回転軸上に設けた複数個の回転子コアに巻装した回転
子巻線をそれぞれ直列に結線し該回転子巻線の接続点に
並列にダイオ−ドを接続した回転子と、固定子巻線およ
び該固定子巻線の一相に直流励磁巻線からなる直流励磁
回路を設けた複数固定子より構成したものである。
In this synchronous motor, rotor windings wound around a plurality of rotor cores provided on the same rotary shaft are connected in series, and the connection points of the rotor windings are connected. It is composed of a rotor in which diodes are connected in parallel, a plurality of stators in which a stator winding and a DC exciting circuit including a DC exciting winding are provided in one phase of the stator winding.

【0008】この同期電動機の直流励磁回路には一般的
に固定子巻線の回転磁界によって基本波の交流電圧を誘
導するようになる。これは固定子の基本波により誘導さ
れた励磁巻線の交流電圧は、ダイオ−ドにより整流され
た直流とともに励磁巻線に重畳して交流電流を流し、さ
らにこの励磁巻線の交流電流は固定子巻線の励磁電流に
加わるように作用するので、固定子巻線の交流電流は大
きくなり、主巻線の容量が大きくなる欠点を有する。こ
の欠点を解消するため励磁回路に大きな直列インダクタ
ンスLが必要となる。このため、大きな直列リアクトル
を挿入したり、あるいは別の方法として固定子巻線の影
響を受けないように固定子とは極数の異なる励磁巻線と
この励磁巻線の極数に対応した別の回転子を構成するこ
とがあった。
In the DC excitation circuit of this synchronous motor, an AC voltage of the fundamental wave is generally induced by the rotating magnetic field of the stator winding. This is because the AC voltage of the excitation winding, which is induced by the fundamental wave of the stator, is superimposed on the excitation winding together with the DC rectified by the diode to flow an AC current, and the AC current of this excitation winding is fixed. Since it acts so as to add to the exciting current of the child winding, there is a drawback that the alternating current of the stator winding becomes large and the capacity of the main winding becomes large. To eliminate this drawback, a large series inductance L is required in the exciting circuit. For this reason, insert a large series reactor, or, as another method, separate the excitation winding with a different number of poles from the stator and the number of poles of this excitation winding so as not to be affected by the stator winding. Had to make up the rotor.

【0009】このような技術は同期電動機の構造を複雑
にするだけでなく大型となるため、特に複数固定子構成
にした誘導機起動可能な同期電動機においては採用する
ことはできないものである。
Since such a technique not only complicates the structure of the synchronous motor but also increases the size thereof, it cannot be employed particularly in a synchronous motor capable of starting an induction machine having a plurality of stators.

【0010】以上のことから、一般の誘導電動機と同様
の起動トルクを発生し、誘導機運転から同期運転への移
行が簡単にでき、しかも同期トルクが大きく、ブラシレ
スで保守の容易な同期電動機の提供と共に、回転子の直
流励磁回路を固定子の同一相に巻線を設けるこれまでの
ような簡単な構成としても、その他の構成や性能に影響
のない同期電動機の提供を技術的課題とする。
From the above, a starting torque similar to that of a general induction motor can be generated, the transition from the induction machine operation to the synchronous operation can be easily performed, the synchronous torque is large, and the brushless and easy-to-maintain synchronous motor can be used. In addition to providing the DC excitation circuit of the rotor, the winding is provided in the same phase of the stator. Even with the simple configuration as before, it is a technical issue to provide a synchronous motor that does not affect other configurations or performance. .

【0011】[0011]

【課題を解決するための手段】本出願人は前記課題を解
決するために、同一回転軸に任意の間隔をおいて設けた
2個の回転子コアを有し、該2個の回転子コアのそれぞ
れに第1の三相回転子巻線を設けて相互に直列に接続す
るとともに、前記2個の回転子コアのそれぞれに第2の
三相回転子巻線を設けて該回転子巻線の端子間にそれぞ
れダイオードを接続した回転子と、前記2個の回転子コ
アに対向して周設した2個の固定子コアを有し、該2個
の固定子コアのそれぞれに固定子主巻線を巻装して三相
電源に接続した固定子と、前記2個の固定子にそれぞれ
補助巻線を設けて該補助巻線を開閉スイッチを介して直
流電源に直列に接続した補助回路とにより同期電動機を
構成した。また、前記固定子主巻線、補助巻線、および
第1、第2回転子巻線の極数がすべて同一に構成するこ
とにより本発明の同期電動機はより簡便に実現できる。
In order to solve the above-mentioned problems, the present applicant has two rotor cores provided on the same rotary shaft at arbitrary intervals, and the two rotor cores are provided. And a second three-phase rotor winding is provided on each of the two rotor cores, and the first three-phase rotor winding is provided on each of the two rotor cores and connected in series with each other. A rotor having a diode connected between its terminals, and two stator cores provided around the two rotor cores so as to face each other, and a stator main body is provided in each of the two stator cores. A stator in which windings are wound and connected to a three-phase power source, and an auxiliary circuit in which an auxiliary winding is provided in each of the two stators and the auxiliary winding is connected in series to a DC power source through an open / close switch. A synchronous motor was constructed by and. Further, the stator main winding, the auxiliary winding, and the first and second rotor windings have the same number of poles, so that the synchronous motor of the present invention can be realized more easily.

【0012】[0012]

【作用】本発明の同期電動機は、2組の固定子主巻線を
設けてそれぞれを三相交流電源R,S,Tに接続し、該
主巻線にはそれぞれ補助巻線を設けてあり、この2個の
固定子の補助巻線は開閉スイッチと直流電源とを介して
直列に接続してある。また回転子は2個の回転子コアを
有してそれぞれに第1の回転子巻線と第2の回転子巻線
を巻装してあり、2個の回転子コアの第1の回転子巻線
は直列に接続し、第2の回転子巻線はそれぞれスター結
線しその巻線の端子間にダイオードを接続してある。
The synchronous motor of the present invention is provided with two sets of stator main windings, which are connected to the three-phase AC power supplies R, S, and T, and the main windings are provided with auxiliary windings. The auxiliary windings of the two stators are connected in series via an open / close switch and a DC power supply. The rotor has two rotor cores, and the first rotor winding and the second rotor winding are respectively wound around the rotor core, and the first rotor of the two rotor cores is provided. The windings are connected in series, the second rotor windings are each star-connected and the diodes are connected between the terminals of the windings.

【0013】以上の構成による同期電動機の作用を始動
から運転に沿って説明する。まず補助巻線の開閉スイッ
チを開放した状態で、2組の固定子主巻線に三相電源を
印加すると、2組の固定子主巻線による回転磁界によっ
て、2個の回転子コアの回転子巻線に同相の電圧を誘起
して、2個の回転子コアに設けた第1回転子巻線には環
流する電流が流れるようになる。つまり誘導電動機の原
理での始動となり、本発明の特徴の一つとなっている。
The operation of the synchronous motor having the above configuration will be described from the start to the operation. First, when the three-phase power supply is applied to the two stator main windings with the open / close switch of the auxiliary winding open, the rotating magnetic field generated by the two stator main windings causes the rotation of the two rotor cores. In-phase voltages are induced in the child windings, and a circulating current flows through the first rotor windings provided in the two rotor cores. In other words, starting is based on the principle of an induction motor, which is one of the features of the present invention.

【0014】このとき前記環流電流は第1の回転子巻線
の短絡電流となっているので、2組の回転子コアに設け
た第1の回転子巻線の直列接続点間の電圧は零となり、
したがって第2の回転子巻線の端子電圧も零となるか
ら、端子間に接続したダイオードには電流はほとんど流
れない。結果的にダイオードによる整流電流は流れない
ので直流分磁束は生じることはなく、回転子にダイオー
ドを含む第2回転子巻線を設けていても誘導機始動に支
障はない。
At this time, since the circulating current is a short-circuit current of the first rotor winding, the voltage between the series connection points of the first rotor windings provided in the two rotor cores is zero. Next to
Therefore, since the terminal voltage of the second rotor winding also becomes zero, almost no current flows through the diode connected between the terminals. As a result, the rectified current by the diode does not flow, so that the DC magnetic flux does not occur, and even if the rotor is provided with the second rotor winding including the diode, there is no problem in starting the induction machine.

【0015】次に同期運転について説明する。誘導機始
動の後、回転子の回転がすべりSでS=0.05に近づ
いたら固定子補助巻線の開閉スイッチを閉じる。このと
き補助巻線には固定子主巻線の回転磁界によって電圧を
誘起しているが、2個の固定子の補助巻線は直列に接続
してあるので、固定子主巻線の回転磁界によって誘起す
る電圧の総和は零となり、補助巻線には交流電流は流れ
ず、直流電流による直流電流のみが補助巻線に流れるよ
うになる。この直流電流によって、補助巻線は静止磁界
を作るが、直流電流は補助巻線を環流するように流れる
ので、その電流の方向が2組の固定子のそれぞれの補助
巻線においては逆方向となり、したがってそれぞれの固
定子の補助巻線のつくる静止磁界の方向もお互いに逆方
向となる。
Next, the synchronous operation will be described. After the start of the induction machine, when the rotation of the rotor approaches S = 0.05 due to the slip S, the open / close switch of the stator auxiliary winding is closed. At this time, a voltage is induced in the auxiliary winding by the rotating magnetic field of the stator main winding, but since the auxiliary windings of the two stators are connected in series, the rotating magnetic field of the stator main winding is The sum of the voltages induced by is zero, no AC current flows through the auxiliary winding, and only DC current due to DC current flows through the auxiliary winding. This DC current causes the auxiliary winding to create a static magnetic field, but since the DC current flows in such a manner as to circulate through the auxiliary winding, the direction of the current is opposite in each auxiliary winding of the two stators. Therefore, the directions of the static magnetic fields created by the auxiliary windings of the respective stators are also opposite to each other.

【0016】さて、この逆方向の静止磁界によって回転
子の第1と第2の回転子巻線に誘起する電圧を考える
と、まず、静止磁界の方向が逆方向となっているので、
2個の回転子コア上において誘起する電圧の方向も逆方
向となっている。したがって2個の回転子コア上に装設
して直列に接続した第1の回転子巻線に誘起する電圧の
総和は零となって、前記静止磁界による電流は第1の回
転子巻線には流れないことになる。一方第2の回転子巻
線は2個の回転子コアにおいて独立した構成となってい
るので、補助巻線の静止磁界により第2の回転子巻線に
誘起した電圧による電流は、第2の回転子巻線の端子に
それぞれ接続したダイオードを通じて流れ、よって整流
された直流分電流によって2個の回転子コアには磁極を
形成することになる。このとき回転子コアの磁極の方向
はダイオードの極性によって決定され回転子巻線の誘起
電圧には無関係である。
Now, considering the voltage induced in the first and second rotor windings of the rotor by this opposite static magnetic field, first, the directions of the static magnetic fields are opposite,
The directions of the voltages induced on the two rotor cores are also opposite. Therefore, the sum of the voltages induced in the first rotor windings mounted on the two rotor cores and connected in series becomes zero, and the current due to the static magnetic field is applied to the first rotor windings. Will not flow. On the other hand, since the second rotor winding has an independent structure in the two rotor cores, the current caused by the voltage induced in the second rotor winding by the static magnetic field of the auxiliary winding is A magnetic pole is formed in the two rotor cores by the rectified direct current flowing through the diodes respectively connected to the terminals of the rotor winding. At this time, the direction of the magnetic pole of the rotor core is determined by the polarity of the diode and is independent of the induced voltage in the rotor winding.

【0017】2個の回転子コアそれぞれの第2の回転子
巻線に設けたダイオードを同方向としておけば、回転子
コアに生じる磁極の極性も2つのコアにおいて同一とな
り、2組の固定子主巻線の作る2つの同位相の回転磁界
との間に同方向のトルクを生じることになる。従って2
組の固定子と2組の回転子コアとの間に発生する同期ト
ルクは加算されてその出力は2個の同期電動機の合成ト
ルクと同じトルクとなる。
If the diodes provided in the second rotor windings of the two rotor cores are oriented in the same direction, the polarities of the magnetic poles generated in the rotor cores will be the same in the two cores, and two sets of stators will be provided. Torque in the same direction is generated between the two rotating magnetic fields of the same phase which are formed by the main winding. Therefore 2
The synchronous torques generated between the pair of stators and the two sets of rotor cores are added, and the output becomes the same torque as the combined torque of the two synchronous motors.

【0018】以上のように本発明による同期電動機は誘
導機始動が可能で、しかも同期運転への引き入れは固定
子側の補助巻線に直流電源を印加することで可能となっ
ているという点と、本発明の構成は固定子と回転子とも
に同極数に構成して実現が可能である点が大きな特徴と
なっている。しかも脱調しても、固定子主巻線の回転磁
界と回転子の第1回転子巻線とによる誘導機作用により
誘導電動機となりうるので、急激な負荷変動あるいは過
負荷による脱調においても誘導電動機のトルクにより電
動機が急激に停止することがない。
As described above, the synchronous motor according to the present invention is capable of starting the induction machine, and can be brought into the synchronous operation by applying the DC power supply to the auxiliary winding on the stator side. The structure of the present invention is characterized in that both the stator and the rotor can be realized with the same number of poles. Moreover, even if the motor is out of step, it can be an induction motor due to the action of an induction machine by the rotating magnetic field of the stator main winding and the first rotor winding of the rotor. The motor torque does not cause the motor to suddenly stop.

【0019】[0019]

【実施例】本発明の実施例を図1により以下に説明す
る。ここで図1に示すものは本発明による同期電動機の
巻線部分の結線状態を明らかにしたものである。
Embodiments of the present invention will be described below with reference to FIG. Here, FIG. 1 shows the connection state of the winding portion of the synchronous motor according to the present invention.

【0020】まず、符号1は回転子側の巻線状態を示し
ている。この回転子側1には2個の回転子コア(図示せ
ず)を有し、それぞれの回転子コアに第1の回転子巻線
3,4が巻装してある。この第1の回転子巻線3,4は
相互に直列に接続してある。更に回転子側1には前記各
回転子コアに第2の回転子巻線5,6が巻装してある。
この第2の回転子巻線5,6はスター結線され、その巻
線の端子間にはそれぞれダイオードD,Dが接続し
てある。この時のダイオードD,Dの極性は同極性
としてある。
First, reference numeral 1 indicates a winding state on the rotor side. The rotor side 1 has two rotor cores (not shown), and the first rotor windings 3 and 4 are wound around the respective rotor cores. The first rotor windings 3, 4 are connected in series with each other. Further, on the rotor side 1, the second rotor windings 5 and 6 are wound around the respective rotor cores.
The second rotor windings 5 and 6 are star-connected, and diodes D 1 and D 2 are connected between terminals of the windings, respectively. The polarities of the diodes D 1 and D 2 at this time are the same.

【0021】一方符号2は固定子側の巻線状態を示して
いる。この固定子側2には前記回転子側1の回転子コア
に対峙して2個の固定子コア(図示せず)を有し、それ
ぞれの固定子コアに固定子主巻線7,8が巻装してあり
開閉スイッチSを介して三相電源R,S,Tに接続し
てある。更に固定子側2には前記各固定子コアに補助巻
線9,10が巻装してある。この補助巻線は直流電源E
と開閉スイッチSとを介して直列に接続して補助回路
11が構成してある。
On the other hand, reference numeral 2 indicates the winding state on the stator side. The stator side 2 has two stator cores (not shown) facing the rotor core of the rotor side 1, and the stator main windings 7 and 8 are provided on the respective stator cores. It is wound and connected to a three-phase power source R, S, T via an open / close switch S 0 . Further, on the stator side 2, auxiliary windings 9 and 10 are wound around each stator core. This auxiliary winding is DC power supply E
And the open / close switch S 1 are connected in series to form the auxiliary circuit 11.

【0022】以上のように構成した各巻線の極数はべて
同極数でよく、固定子側2、回転子側1ともにそれぞれ
を製造する上において、極数が異なる2種の巻線を設け
た場合のような構造にする必要はなく、簡便な構造とす
ることができる。ところで本発明において、固定子主巻
線7,8の三相電源R,S,Tへの接続及び、三相巻線
の結線の形態など本実施例に限定されることはなく、ス
ター、デルタあるいは直列、並列のいずれを選択しても
よい。
The number of poles of each winding configured as described above may be the same, and two types of windings having different numbers of poles are used for manufacturing each of the stator side 2 and the rotor side 1. It is not necessary to have the structure as in the case where it is provided, and the structure can be simple. By the way, the present invention is not limited to the present embodiment such as the connection of the stator main windings 7 and 8 to the three-phase power sources R, S and T and the form of the connection of the three-phase windings, and a star or delta Alternatively, either serial or parallel may be selected.

【0023】以上の構成による同期電動機の作用を始動
から運転に沿って説明する。まず補助回路11の開閉ス
イッチSを開放した状態で、開閉スイッチSを閉じ
て、2組の固定子主巻線7,8に三相電源を印加する。
この三相電源R,S,Tを印加すると、2組の固定子主
巻線7,8には一般の誘導電動機と同様の回転磁界を生
じる。2組の固定子主巻線7,8による回転磁界によっ
て、2組の回転子コアの第1回転子巻線3,4には同相
の電圧eを誘起して、相互に直列にした回転子巻線
3,4を環流する電流が流れるようになる。このことは
誘導電動機の原理で始動することになり、他の起動機を
必要としない自己起動可能な同期電動機となっている。
The operation of the synchronous motor having the above configuration will be described from start to operation. First, the open / close switch S 1 of the auxiliary circuit 11 is opened, the open / close switch S 0 is closed, and three-phase power is applied to the two sets of stator main windings 7 and 8.
When this three-phase power source R, S, T is applied, a rotating magnetic field similar to that of a general induction motor is generated in the two sets of stator main windings 7 and 8. A rotating magnetic field generated by the two sets of stator main windings 7 and 8 induces an in-phase voltage e 1 in the first rotor windings 3 and 4 of the two sets of rotor cores to rotate them in series. The current circulating in the sub windings 3 and 4 comes to flow. This means that the induction motor is started based on the principle of the induction motor, which is a self-starting synchronous motor that does not require any other starter.

【0024】このとき第1の回転子巻線3,4を流れる
環流電流は短絡電流となっているので、2組の回転子巻
線3,4を相互に接続した直列接続点間の電圧は零とな
っている。したがって第2の回転子巻線5,6の端子電
圧も零となるので、その端子間に接続したダイオードD
,Dには電流はほとんど流れていない状態である。
つまり第2の回転子巻線5,6のダイオードD,D
による整流電流は流れないので直流分磁束を発生するこ
ともない。このことは始動時において、回転子にダイオ
ードを含む回転子巻線を設けていても回転子に磁極を形
成することもなく、誘導機の原理での始動に何ら影響す
ることはない。
At this time, since the circulating current flowing through the first rotor windings 3 and 4 is a short-circuit current, the voltage between the series connection points where the two rotor windings 3 and 4 are connected to each other is It is zero. Therefore, the terminal voltage of the second rotor windings 5 and 6 also becomes zero, and the diode D connected between the terminals is
A current hardly flows through 1 and D 2 .
That is, the diodes D 1 , D 2 of the second rotor windings 5, 6
Since the rectification current due to does not flow, a DC magnetic flux is not generated. This does not form a magnetic pole on the rotor even when the rotor winding including the diode is provided on the rotor at the time of starting, and does not affect the starting on the principle of the induction machine.

【0025】次に同期運転について説明する。誘導機の
原理で始動した後、回転子の回転が上昇し、回転子のす
べりSがS=0.05に近づいたら固定子補助回路11
の開閉スイッチSを閉じて直流電源Eを補助巻線9,
10に印加するようにした。さてこのとき補助巻線9,
10には固定子主巻線7,8の回転磁界によって電圧e
を誘起しているが、補助巻線9,10は直列に接続し
てあり、開閉スイッチSを閉じても電流は流れない。
これは固定子主巻線7,8により誘起している電圧e
は補助回路11内で互いに逆方向となって電圧eの総
和は零となっているからである。したがって補助回路1
1には交流電流は流れず、直流電源Eによる直流電流I
のみが補助巻線9,10に流れるようになる。この直流
電流Iによって、補助巻線9,10はそれぞれ静止磁界
を作る。この静止磁界は直流電流Iが補助回路11を環
流するように流れることから2組の補助巻線9,10に
おいて互いに逆方向となっている。
Next, the synchronous operation will be described. After starting by the principle of the induction machine, the rotation of the rotor rises, and when the rotor slip S approaches S = 0.05, the stator auxiliary circuit 11
The open / close switch S 1 is closed to connect the DC power source E to the auxiliary winding 9,
The voltage was applied to 10. Now, at this time, the auxiliary winding 9,
10 has a voltage e due to the rotating magnetic field of the stator main windings 7 and 8.
Although 0 is induced, the auxiliary windings 9 and 10 are connected in series, and no current flows even if the open / close switch S 1 is closed.
This is the voltage e 0 induced by the stator main windings 7, 8.
Is because the auxiliary circuits 11 have mutually opposite directions, and the sum of the voltages e 0 is zero. Therefore, the auxiliary circuit 1
No AC current flows through the DC power supply 1, and the DC current I from the DC power supply E
Only the auxiliary windings 9 and 10 will flow. The direct current I causes the auxiliary windings 9 and 10 to generate a static magnetic field. This static magnetic field is in the opposite directions in the two sets of auxiliary windings 9 and 10 because the direct current I flows so as to circulate in the auxiliary circuit 11.

【0026】この互いに逆方向の静止磁界は回転子側1
の第1の回転子巻線3,4と第2の回転子巻線5,6そ
れぞれに電圧e,eを誘起している。ここで第1の
回転子巻線3,4に誘起する電圧eを見るに、逆方向
の静止磁界によって互いに逆方向の電圧eを誘起して
いることから、第1の回転子巻線3,4に誘起する電圧
の総和は零となって電流は流れないことになる。
The static magnetic fields in the opposite directions are applied to the rotor side 1
The voltages e 2 and e 3 are induced in the first rotor windings 3 and 4 and the second rotor windings 5 and 6, respectively. Here, looking at the voltage e 2 induced in the first rotor winding 3 and 4, since it is induced reverse voltage e 2 from each other by a reverse stationary magnetic field, the first rotor winding The sum of the voltages e 2 induced in 3 and 4 becomes zero, and no current flows.

【0027】一方第2の回転子巻線5,6は独立した構
成となってるので、補助巻線9,10の静止磁界により
誘起した電圧eによって第2の回転子巻線5,6の端
子にそれぞれ接続したダイオードD,Dを通じて整
流電流が流れるようになる。この整流された直流分電流
によって、2個の回転子コア部分には磁極を形成するこ
とになる。
On the other hand, since the second rotor windings 5 and 6 have an independent structure, the voltage e 3 induced by the static magnetic field of the auxiliary windings 9 and 10 causes the second rotor windings 5 and 6 to move. A rectified current flows through the diodes D 1 and D 2 connected to the terminals, respectively. The rectified direct current component forms magnetic poles in the two rotor core portions.

【0028】ここで磁極の方向はダイオードの極性によ
って決定されるので、このダイオードD,Dの極性
を同方向としておけば、回転子コアに生じる磁極の極性
も2つのコアにおいて同一となり、2つの固定子主巻線
7,8の作る2つの同位相の回転磁界との間に同方向の
トルクを生じることになる。つまり2組の固定子と2組
の回転子コアとの間に発生する同期トルクが加算されて
その出力は2個の同期電動機の合成トルクとなる。
Since the direction of the magnetic pole is determined by the polarity of the diode, if the polarities of the diodes D 1 and D 2 are the same, the polarities of the magnetic poles generated in the rotor core will be the same in the two cores. Torque in the same direction is generated between the two stator main windings 7 and 8 and the two rotating magnetic fields having the same phase. That is, the synchronous torques generated between the two sets of stators and the two sets of rotor cores are added, and the output becomes the combined torque of the two synchronous motors.

【0029】ところで、前記開閉スイッチSと電動機
の速度検出器とを制御装置を介して連絡するなど、同期
引き入れへの自動化の手段は自由に選択可能である。
By the way, an automatic means for the synchronous pull-in can be freely selected, for example, by connecting the open / close switch S 1 and the speed detector of the electric motor through a control device.

【0030】[0030]

【発明の効果】以上の構成から本発明の同期電動機は、
始動時を従来の誘導電動機と同様のトルク特性で行い、
回転子の速度がたとえばすべりS=0.05付近から同
期速度に移行して同期電動機のトルク特性で運転するも
のである。この同期電動機は起動機やブラシを必要とし
ないから、その構造や構成が簡単となるだけでなく、従
来の誘導電動機と同様のトルク特性で始動できるので重
負荷がかかったままでも始動から同期への移行が可能と
なる。また、この始動から同期への移行も固定子の補助
巻線に直流電流を流すよう開閉スイッチSを閉じるだ
けの簡単な操作で可能となった。
As described above, the synchronous motor of the present invention has the following structure.
Performs starting with the same torque characteristics as the conventional induction motor,
For example, the speed of the rotor shifts from the vicinity of slip S = 0.05 to the synchronous speed and the rotor is operated with the torque characteristics of the synchronous motor. Since this synchronous motor does not require a starter or brush, it not only has a simple structure and configuration, but it can be started with the same torque characteristics as conventional induction motors, so even if a heavy load is applied, it will be possible to change from start to synchronization. Can be migrated. Further, the shift from the start to the synchronization is also possible by a simple operation of closing the open / close switch S 1 so that a direct current is passed through the auxiliary winding of the stator.

【0031】ところで、本発明の同期電動機は、誘導電
動機と同期電動機との両方のトルク特性を備えるから、
どちらの電動機のトルク特性でも使用可能である。この
ことは同期速度で運転中、何らかの原因で脱調した場合
でも同期電動機のトルク特性から誘導電動機のトルク特
性に切り換えて運転することが可能であるから、一般の
同期電動機のように電動機が急激に停止することはな
い。
By the way, the synchronous motor of the present invention has the torque characteristics of both the induction motor and the synchronous motor.
The torque characteristics of either motor can be used. This means that even if a step out occurs for some reason during operation at synchronous speed, it is possible to operate by switching from the torque characteristics of the synchronous motor to the torque characteristics of the induction motor. Never stop.

【0032】以上のようにブラシがなく複雑な構成を必
要としないから、保守点検が容易で信頼性も高く、起動
トルクの大きい同期電動機の提供が可能となった。
As described above, since there is no brush and a complicated structure is not required, it is possible to provide a synchronous motor that is easy to maintain and has high reliability and has a large starting torque.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明による同期電動機の、固定子と回転子の
巻線部分だけを抜きだした図である。
FIG. 1 is a diagram showing only a winding portion of a stator and a rotor of a synchronous motor according to the present invention.

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 同一回転軸に任意の間隔をおいて設けた
2個の回転子コアを有し、該2個の回転子コアのそれぞ
れに第1の三相回転子巻線を設けて相互に直列に接続す
るとともに、前記2個の回転子コアのそれぞれに第2の
三相回転子巻線を設けて該回転子巻線の端子間にそれぞ
れダイオードを接続した回転子と、前記2個の回転子コ
アに対向して周設した2個の固定子コアを有し、該2個
の固定子コアのそれぞれに固定子主巻線を巻装して三相
電源に接続した固定子と、前記2個の固定子にそれぞれ
補助巻線を設けて該補助巻線を開閉スイッチを介して直
流電源に直列に接続した補助回路とにより構成したこと
を特徴とする同期電動機。
1. A rotor having two rotor cores provided on the same rotary shaft at arbitrary intervals, and a first three-phase rotor winding being provided on each of the two rotor cores. And a rotor in which a second three-phase rotor winding is provided on each of the two rotor cores and a diode is connected between terminals of the rotor winding, A stator having two stator cores provided around the rotor core, the stator main winding being wound around each of the two stator cores and connected to a three-phase power source. A synchronous motor comprising an auxiliary circuit in which each of the two stators is provided with an auxiliary winding, and the auxiliary winding is connected in series to a DC power source through an open / close switch.
【請求項2】 請求項1記載の同期電動機であって、前
記固定子主巻線、補助巻線、および第1、第2回転子巻
線の極数がすべて同一であることを特徴とする同期電動
機。
2. The synchronous motor according to claim 1, wherein the stator main winding, the auxiliary winding, and the first and second rotor windings have the same number of poles. Synchronous motor.
JP14006093A 1993-05-18 1993-05-18 Synchronous motor Pending JPH06335271A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14006093A JPH06335271A (en) 1993-05-18 1993-05-18 Synchronous motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14006093A JPH06335271A (en) 1993-05-18 1993-05-18 Synchronous motor

Publications (1)

Publication Number Publication Date
JPH06335271A true JPH06335271A (en) 1994-12-02

Family

ID=15260054

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14006093A Pending JPH06335271A (en) 1993-05-18 1993-05-18 Synchronous motor

Country Status (1)

Country Link
JP (1) JPH06335271A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5866964A (en) * 1996-01-29 1999-02-02 Emerson Electric Company Reluctance machine with auxiliary field excitations
US5923142A (en) * 1996-01-29 1999-07-13 Emerson Electric Co. Low cost drive for switched reluctance motor with DC-assisted excitation
CN103997173A (en) * 2014-05-08 2014-08-20 江苏航天动力机电有限公司 Synchronous and asynchronous switched motor
KR101464368B1 (en) * 2013-08-13 2014-11-21 주식회사 효성 Operation method of generator rotor and the generator thereof

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5866964A (en) * 1996-01-29 1999-02-02 Emerson Electric Company Reluctance machine with auxiliary field excitations
US5923142A (en) * 1996-01-29 1999-07-13 Emerson Electric Co. Low cost drive for switched reluctance motor with DC-assisted excitation
KR101464368B1 (en) * 2013-08-13 2014-11-21 주식회사 효성 Operation method of generator rotor and the generator thereof
CN103997173A (en) * 2014-05-08 2014-08-20 江苏航天动力机电有限公司 Synchronous and asynchronous switched motor

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