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JPS6364555A - Special squirrel-cage type induction motor - Google Patents

Special squirrel-cage type induction motor

Info

Publication number
JPS6364555A
JPS6364555A JP20743386A JP20743386A JPS6364555A JP S6364555 A JPS6364555 A JP S6364555A JP 20743386 A JP20743386 A JP 20743386A JP 20743386 A JP20743386 A JP 20743386A JP S6364555 A JPS6364555 A JP S6364555A
Authority
JP
Japan
Prior art keywords
rotor
induction motor
circumferential surface
rotor core
conductor
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
JP20743386A
Other languages
Japanese (ja)
Inventor
Iwao Shibata
柴田 岩夫
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.)
Sumtak Corp
Original Assignee
Sumtak Corp
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 Sumtak Corp filed Critical Sumtak Corp
Priority to JP20743386A priority Critical patent/JPS6364555A/en
Publication of JPS6364555A publication Critical patent/JPS6364555A/en
Pending legal-status Critical Current

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  • Induction Machinery (AREA)

Abstract

PURPOSE:To reduce the surging of torque and occurrence of noise, by performing multiple grooving directly to the circumferential surface of a rotor core or to a rotor conductor such as thin copper plate wound around the circumferential surface of the rotor core. CONSTITUTION:A special squirrel-cage type induction motor is equipped with a rotor 1 and a stator 6. The rotor 1 is equipped with a rotor conductor 4, such as thin copper plate, wound around the circumferential surface of a rotor core 3 fitted to a shaft 2. In order to obtain effective torque current without eddy currents due to the secondary current, multiple grooves 5A and 5B are formed to the surface of this conductor 4. Thus, the surging of torque in superlow speed operation can be reduced on a wide scale.

Description

【発明の詳細な説明】 (産業上の利用分野) 本発明は持株かご形誘導電動機に関する。[Detailed description of the invention] (Industrial application field) The present invention relates to a holding squirrel cage induction motor.

(従来技術およびその問題点) 従来、各種の産業用機械の駆動等に用いられる電動機と
しては、精密な速度制御が要求されろことから直流機が
一般的であった。しかしながら、直流機は ■堅牢さにやや欠ける。
(Prior Art and its Problems) Conventionally, DC motors have been common as electric motors used to drive various industrial machines because precise speed control is required. However, DC machines are somewhat lacking in robustness.

■高価である。■It is expensive.

■メンテナンスに手間がかかる。■Maintenance is time consuming.

等の欠点があることから、最近では半導体を使用した周
波数変換装置としての静止形インバータとかご形誘導電
動機とを組み合わせたシステム(交流方式)に置き換え
られてきている。なお、かご形誘導電動機の利点は上記
の直流機の欠点を裏返したものであり、 ■′槽構造簡単である。
Due to these drawbacks, recently, systems have been replaced by systems (AC system) that combine a static inverter as a frequency converter using semiconductors and a squirrel cage induction motor. The advantages of squirrel-cage induction motors are the opposite of the disadvantages of DC motors mentioned above: (1) The tank structure is simple.

■′堅牢である。■'Sturdy.

■′安価である。■′It is inexpensive.

■′メンテナンスに手間がかからない。■'Maintenance is not time-consuming.

等である。etc.

このように、かご形誘導電動機を用いた交流方式では有
利な点が多いが、従来では考えられないような広い速度
範囲にわたって精密な速度制御が要求される今日におい
ては、従来あまり問題とされなかった特性上の弱点が浮
き彫りにらは特に超低速運転時におけろものであり、高
速運転時には回転子の慣性等により特性に現われなかっ
たスロットリップルの影響や、巻線方式により本質的に
発生する第5.第7.第9高調波の影響によるトルク変
動、騒音の発生である。しかして、これらが交流方式の
致命的な障害となっていた。
As described above, the AC system using squirrel cage induction motors has many advantages, but in today's world where precise speed control is required over a wide speed range unimaginable in the past, this method has not been considered much of a problem in the past. The weak points in the characteristics that have been highlighted are the effects of slot ripple, which does not appear in the characteristics during high-speed operation due to the inertia of the rotor, and the fact that it is inherently caused by the winding method. Fifth. 7th. Torque fluctuations and noise occur due to the influence of the 9th harmonic. However, these were fatal obstacles to the AC system.

(問題点を解決するための手段) 本発明は上記の点に鑑み提案されたものであり、その目
的とするところは、交流方式の有するトルク変動、騒音
の発生を軽減することのできる新たな構造の特殊かご形
誘導電動機を提供することにある。
(Means for Solving the Problems) The present invention has been proposed in view of the above points, and its purpose is to provide a new method that can reduce the torque fluctuations and noise generated by the AC system. The object of the present invention is to provide a squirrel cage induction motor with a special structure.

本発明は上記の目的を達成するため、回転子鉄心の周面
にM接にもしくは周面に巻き付けた薄い銅板の如き回転
子導体に複数の溝切りを行ってなることを特徴とする特
殊かご形誘導電動機を要旨としている。
In order to achieve the above object, the present invention provides a special cage characterized in that a plurality of grooves are cut in a rotor conductor, such as a thin copper plate, which is wrapped around the circumferential surface of a rotor core in an M-tangular manner. The main subject is induction motors.

(作用) 本発明では回転子鉄心の周面に従来のパ一方式に比べ多
数の溝切りを可能とし、その溝を間々に形成することに
より、回転子と固定子との間の磁気的なパーミアンスの
変化を小さくし、スロットリップルや高調波によるトル
ク変動。
(Function) In the present invention, it is possible to cut a larger number of grooves on the circumferential surface of the rotor core compared to the conventional one-piece type, and by forming the grooves at intervals, magnetic Reduce permeance changes and torque fluctuations due to throttle ripple and harmonics.

騒音の発生を低減するようにしている。Efforts are being made to reduce noise generation.

(実施例) 以下、実施例を示す図面に沿って本発明を詳述する。(Example) Hereinafter, the present invention will be described in detail with reference to the drawings showing examples.

第1図および第2図は本発明の特殊かご形誘導電a機の
一実施例を示したものであり、第1図は回転子1の外観
構成図、第2図は回転子1と固定子6とを組み合わせた
状態における断面図の一部を示している。
Figures 1 and 2 show an embodiment of the special squirrel cage induction electric machine of the present invention. Figure 1 is an external configuration diagram of the rotor 1, and Figure 2 is the rotor 1 and fixed A part of a cross-sectional view in a state in which the child 6 is combined is shown.

しかして、軸2に取り付けられた回転子鉄心3の周面に
薄い銅板等を巻き付けて回転子導体4を形成し、その表
面に二次電流の渦流を防し)で効率の良いトルク電流を
得るために複数の溝SA、 5Bを形成(溝切り)する
ようにしている。なお、この構造によれば、溝切りの本
数を従来のパ一方式では不可能であるような多数とする
ことが可能であり、これにより超低速運転時におけるト
ルク変動を大幅に減少させることができる。また、溝を
軸方向に5A、 5Bのように分割し、その本数もしく
(ま溝切りの角度(位N)を変えることにより、高調波
の影響を相殺することが可能となる。なお、図において
7は固定子鉄心、8は固定子溝、Gば回転子1と固定子
6との間の空隙である。
Therefore, the rotor conductor 4 is formed by wrapping a thin copper plate or the like around the circumferential surface of the rotor core 3 attached to the shaft 2, and the rotor conductor 4 is prevented from eddying the secondary current on its surface. In order to obtain this, a plurality of grooves SA and 5B are formed (grooved). Furthermore, according to this structure, it is possible to cut a large number of grooves, which is impossible with the conventional one-wheel type, and this makes it possible to significantly reduce torque fluctuations during ultra-low speed operation. can. In addition, by dividing the groove into 5A and 5B in the axial direction and changing the number of grooves or the angle (position N) of the groove, it is possible to cancel out the effects of harmonics. In the figure, 7 is a stator core, 8 is a stator groove, and G is a gap between the rotor 1 and the stator 6.

また、上記の実施例では回転子鉄心3の周面に回転子導
体4を形成した場合を示したが、回転子鉄心3を鉄だけ
のソリッド形とし、その周面に同様に溝切りを行うよう
にしてもよい。
Furthermore, although the above embodiment shows the case where the rotor conductor 4 is formed on the circumferential surface of the rotor core 3, the rotor core 3 is made of solid iron only, and grooves are similarly cut on the circumferential surface of the rotor core 3. You can do it like this.

(発明の効果) 以上のように本発明にあっては、回転子鉄心の周面に直
接にもしくは周面に巻き付けた薄い銅板の如き回転子導
体に複数の溝切りを行うようにしたので、回転子と固定
子との間の磁気的なパーミアンスの変化を極力少なくす
ることが
(Effects of the Invention) As described above, in the present invention, a plurality of grooves are cut in the rotor conductor, such as a thin copper plate, directly on the circumferential surface of the rotor core or wrapped around the circumferential surface. It is possible to minimize changes in magnetic permeance between the rotor and stator.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図および第2図は本発明の持株かご形誘導電動機の
一実施例を示したものてあり、第1図は回転子の外観構
成図、第2図は回転子と固定子とを組み合わせた状態に
おける断面図の一部である。 1 ・・・・回転子、2 ・・・軸、3・ ・回転子鉄
心、4・・・回転子導体、5人、 5B−・溝、6 ・
・・固定子、7・・・・固定子鉄心、8 ・・・固定子
溝、G−・−・・空隙
Figures 1 and 2 show an embodiment of the holding squirrel cage induction motor of the present invention. Figure 1 is an external configuration diagram of a rotor, and Figure 2 is a combination of a rotor and a stator. It is a part of sectional view in a state where 1...Rotor, 2...Shaft, 3...Rotor core, 4...Rotor conductor, 5 people, 5B--Groove, 6...
...Stator, 7...Stator core, 8...Stator groove, G-...Gap

Claims (2)

【特許請求の範囲】[Claims] (1)回転子鉄心の周面に直接にもしくは周面に巻き付
けた薄い銅板の如き回転子導体に複数の溝切りを行って
なることを特徴とした特殊かご形誘導電動機。
(1) A special squirrel-cage induction motor characterized by having a plurality of grooves cut into a rotor conductor such as a thin copper plate that is wound directly on or wrapped around the circumferential surface of a rotor core.
(2)回転子鉄心の溝を軸方向に分割し、かつ溝の数も
しくは配置角度を変化せしめてなる特許請求の範囲第1
項記載の特殊かご形誘導電動機。
(2) Claim 1 in which the grooves of the rotor core are divided in the axial direction and the number or arrangement angle of the grooves is changed.
The special squirrel cage induction motor described in Section 1.
JP20743386A 1986-09-02 1986-09-02 Special squirrel-cage type induction motor Pending JPS6364555A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP20743386A JPS6364555A (en) 1986-09-02 1986-09-02 Special squirrel-cage type induction motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP20743386A JPS6364555A (en) 1986-09-02 1986-09-02 Special squirrel-cage type induction motor

Publications (1)

Publication Number Publication Date
JPS6364555A true JPS6364555A (en) 1988-03-23

Family

ID=16539683

Family Applications (1)

Application Number Title Priority Date Filing Date
JP20743386A Pending JPS6364555A (en) 1986-09-02 1986-09-02 Special squirrel-cage type induction motor

Country Status (1)

Country Link
JP (1) JPS6364555A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8536759B2 (en) 2009-11-16 2013-09-17 G+ Powertee Ltd. AC generator

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8536759B2 (en) 2009-11-16 2013-09-17 G+ Powertee Ltd. AC generator

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