JP2537895B2 - Induction motor - Google Patents
Induction motorInfo
- Publication number
- JP2537895B2 JP2537895B2 JP62210473A JP21047387A JP2537895B2 JP 2537895 B2 JP2537895 B2 JP 2537895B2 JP 62210473 A JP62210473 A JP 62210473A JP 21047387 A JP21047387 A JP 21047387A JP 2537895 B2 JP2537895 B2 JP 2537895B2
- Authority
- JP
- Japan
- Prior art keywords
- winding
- auxiliary
- main
- main winding
- induction motor
- 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.)
- Expired - Fee Related
Links
Landscapes
- Induction Machinery (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は、始動時の脈動トルクを小さくすることがで
きる誘導電動機に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an induction motor capable of reducing pulsating torque at starting.
従来の技術 一般に、誘導電動機の始動時脈動トルクは固定子およ
び回転子のスロット数に影響されており、特に固定子巻
線が複数のスロットに分散して配置されていることによ
る磁束分布の歪み高調波成分の内、回転子スロット数に
同期した磁束高調波成分が大きいほど、脈動トルクの波
打ちが大きくなっていた。Conventional technology Generally, the pulsating torque at the start of an induction motor is affected by the number of slots in the stator and rotor, and in particular, the distortion of the magnetic flux distribution due to the stator windings being distributed over multiple slots. Among the harmonic components, the larger the magnetic flux harmonic component synchronized with the number of rotor slots, the larger the ripple of the pulsating torque.
以下、図面を参照しながら説明する。 Hereinafter, description will be given with reference to the drawings.
第２図は従来より一般に使われている誘導電動機の始動
時脈動トルクの一例を示すものである。使用した誘導電
動機は、単相２極,115V,60Hz,0.6kW,PSC運転用で 固定子スロット数:20 回転子スロット数:26 主巻線有効巻数:67.806ターン×２ 補助巻線有効巻数:104.091ターン×２ のものである。FIG. 2 shows an example of a pulsating torque at the time of starting an induction motor which has been generally used conventionally. The induction motor used is for single-phase 2-pole, 115V, 60Hz, 0.6kW, PSC operation. Number of stator slots: 20 Number of rotor slots: 26 Effective number of main windings: 67.806 turns x 2 Effective number of auxiliary windings: It is 104.091 turns x 2.
この２極のモータの場合、極対数Ｐが１で回転子スロッ
ト数N2が26個であるので、回転子スロット数に同期した
磁束高調波成分は（N2／（２×Ｐ）となるため、13高調
波になる。In the case of this two-pole motor, since the number of pole pairs P is 1 and the number of rotor slots N 2 is 26, the magnetic flux harmonic component synchronized with the number of rotor slots is (N 2 / (2 × P)). Therefore, it becomes 13 harmonics.
第２図に従来モータの場合主巻線と補助巻線の13高調波
含有率は下記の様になっていた。Fig. 2 shows the 13 harmonic content of the main and auxiliary windings of the conventional motor as follows.
主巻線13高調波含有率:1.3％ 補助巻線13高調波含有率:1.1％ 第２図に於いて、始動時脈動トルクの平均値Ts-2は6k
g・cmであるが主巻線および補助巻線の13高調波含有率
が１％を越しており、始動時脈動トルクの最低値T
s-min2は3.2kg・cmとなっていた。Main winding 13 harmonic content rate: 1.3% Auxiliary winding 13 harmonic content rate: 1.1% In Fig. 2, the average value of pulsating torque at start Ts -2 is 6k.
Although g · cm, the 13th harmonic content of the main winding and auxiliary winding exceeds 1%, and the minimum value of pulsating torque at starting T
s-min2 was 3.2 kg · cm.
発明が解決しようとする問題点 しかし、このような従来の誘導電動機の場合、始動時
脈動トルクの最低値Ts-min2が3.2kg・cmとなっているた
め、始動時に必要とするトルクが3.2kg・cm以上の負荷
には始動出来ない可能性がある。このように、巻線の
（N2／（２×Ｐ））磁束高調波含有率が１％を越えると
始動時脈動トルクの平均値は大きいのに最低値はその約
半分になってしまっており、重い負荷を始動させること
ができなくなる。したがって、始動性を改善させるため
には、始動コンデンサを付加する必要があり、結果的に
高価な誘導電動機が必要となってしまう。Problems to be Solved by the Invention However, in the case of such a conventional induction motor, since the minimum value T s-min2 of the pulsating torque at the time of starting is 3.2 kg ・ cm, the torque required at the time of starting is 3.2 It may not be able to start when the load exceeds kg · cm. Thus, when the (N 2 / (2 × P)) magnetic flux harmonic content of the winding exceeds 1%, the average value of the pulsating torque at start is large, but the minimum value is about half of that. Therefore, a heavy load cannot be started. Therefore, in order to improve the startability, it is necessary to add a starting capacitor, and as a result, an expensive induction motor is required.
本発明は上記の問題点を解決し、安価で始動時脈動ト
ルクの最低値Ts-minを大きくすることができる誘導電動
機を提供することを目的としたものである。An object of the present invention is to solve the above problems and to provide an inexpensive induction motor capable of increasing the minimum value T s-min of the pulsating torque at the time of starting.
問題点を解決するための手段 上記従来の問題点を解決するために本発明は、スロッ
ト数が26の回転子鉄心と、スロット数が20の固定子鉄心
と、前記固定子鉄心スロットに第１ないし第４の主巻線
を直列に接続して同心巻きした主巻線群と、前記主巻線
群と互いの中心が90°ずれた位置となるように第１ない
し第３の補助巻線を直列に接続して前記固定子鉄心スロ
ットに同心巻きした補助巻線群とを有する２極単相誘導
電動機であって、第１の主巻線および第１の補助巻線の
巻線ピッチが9/10、第２の主巻線および第２の補助巻線
の巻線ピッチが7/10、第３の主巻線および第３の補助巻
線の巻線ピッチが5/10、第４の主巻線の巻線ピッチが3/
10であり、かつ各主巻線の巻数比が第１の主巻線：第２
の主巻線：第３の主巻線：第４の主巻線＝24:29:21:1
0、各補助巻線の巻数比が第１の補助巻線：第２の補助
巻線：第３の補助巻線＝57:38:17であることを特徴とす
る誘導電動機を用いるものである。Means for Solving the Problems In order to solve the above conventional problems, the present invention provides a rotor core having 26 slots, a stator core having 20 slots, and a first stator core slot. To a fourth main winding connected in series and concentrically wound, and first to third auxiliary windings such that the centers of the main winding and the main winding are offset from each other by 90 ° A two-pole single-phase induction motor having a group of auxiliary windings connected in series with each other and concentrically wound around the stator core slot, wherein 9/10, the winding pitch of the second main winding and the second auxiliary winding is 7/10, the winding pitch of the third main winding and the third auxiliary winding is 5/10, the fourth The main winding has a winding pitch of 3 /
10 and the winding ratio of each main winding is the first main winding: the second
Main winding: 3rd main winding: 4th main winding = 24: 29: 21: 1
0, the ratio of the number of turns of each auxiliary winding is 1st auxiliary winding: 2nd auxiliary winding: 3rd auxiliary winding = 57:38:17, using an induction motor .
作用 この構成により、回転子スロット数と同数の極数を持
つ高調波起磁力を小さくすることができるため、13次高
調波同期トルクを簡単に減少でき、始動時脈動トルクの
最低値を大きくすることができる。したがって、特別な
始動用コンデンサを必要とせず、小型の誘導電動機にお
いて大きな始動トルクを発生させることができ、安価な
誘導電動機を提供することが可能となる。Function With this configuration, the harmonic magnetomotive force having the same number of poles as the number of rotor slots can be reduced, so the 13th harmonic synchronous torque can be easily reduced, and the minimum value of pulsating torque at startup is increased. be able to. Therefore, a special starting capacitor is not required, a large starting torque can be generated in a small induction motor, and an inexpensive induction motor can be provided.
実施例 以下、本発明の一実施例について説明する。第１図
（ａ）は本発明の一実施例を示すもので、第１図（ａ）
において、１は固定子スロット数が20の固定子鉄心であ
る。この固定子鉄心１には、固定子主巻線2,3,4,5を対
向させて巻回している。この固定子主巻線2,3,4,5と90
°ずらして固定子補助巻線6,7,8を同じように対向させ
て巻回している。Example Hereinafter, an example of the present invention will be described. FIG. 1 (a) shows an embodiment of the present invention, and FIG.
In the above, 1 is a stator core having 20 stator slots. Main stator windings 2, 3, 4, and 5 are wound around the stator core 1 so as to face each other. This stator main winding 2,3,4,5 and 90
The stator auxiliary windings 6, 7 and 8 are wound so as to face each other in the same manner while being shifted.
このような本実施例の固定子鉄心１を用いた誘導電動
機の仕様を下記に示す。The specifications of the induction motor using the stator core 1 of this embodiment are shown below.
単相,2極，極対数Ｐ＝1,115V,60Hz,0.6kW,PSC運転のも
と 固定子スロット数:20 回転子スロット数：N2＝26に於ける 各固定子巻線2,3,4,5,6,7,8に対しての巻回ピッチと巻
数Ｔ（ｎ）ターンを次表に示す。Single-phase, 2-pole, number of pole pairs P = 1,115V, 60Hz, 0.6kW, under PSC operation Number of stator slots: 20 Number of rotor slots: N 2 = 26, each stator winding 2, 3, The following table shows the winding pitch and the number of turns T (n) turns for 4, 5, 6, 7, and 8.
上記仕様より、主巻線、補助巻線の有効巻線、Wme,Wae
は、 となる。また、 以上の通り、主巻線・補助巻線共に13次巻線高調波含有
率を小さくできる。この本実施例における電動機始動時
脈動トルクを第１図（ｂ）に示す。主巻線・補助巻線の
有効巻線は従来例とほぼ同一であり、従って始動時脈動
トルクの平均値Ts-1は6kg・cmと従来例と同一である。 From the above specifications, main winding, effective winding of auxiliary winding, Wme, Wae
Is Becomes Also, As described above, both the main winding and the auxiliary winding can reduce the 13th-order harmonic content. The pulsating torque at the time of starting the electric motor in this embodiment is shown in FIG. 1 (b). The effective windings of the main winding and the auxiliary winding are almost the same as in the conventional example, and therefore the average value T s-1 of the pulsating torque at starting is 6 kg · cm, which is the same as the conventional example.
しかし、始動時脈動トルクの最低値Ts-min1は4.8kg・cm
と従来例よりも大きな値を示しており、従って始動時必
要トルクが4.8kg・cmまでの負荷を回すことが可能であ
る。However, the minimum value of pulsating torque at startup T s-min1 is 4.8 kg ・ cm
Thus, a larger value than the conventional example is shown, and therefore, it is possible to turn the load up to the required starting torque of 4.8 kg · cm.
発明の効果 以上の通り、本発明による電動機はスロット数が26の
回転子鉄心と、スロット数が20の固定子鉄心と、前記固
定子鉄心スロットに第１ないし第４の主巻線を直列に接
続して同心巻きした主巻線群と、前記主巻線群と互いの
中心が90°ずれた位置となるように第１ないし第３の補
助巻線を直列に接続して前記固定子鉄心スロットに同心
巻きした補助巻線群とを有する２極単相誘導電動機であ
って、第１の主巻線および第１の補助巻線の巻線ピッチ
が9/10、第２の主巻線および第２の補助巻線の巻線ピッ
チが7/10、第３の主巻線および第３の補助巻線の巻線ピ
ッチが5/10、第４の主巻線の巻線ピッチが3/10であり、
かつ各主巻線の巻数比が第１の主巻線：第２の主巻線：
第３の主巻線：第４の主巻線＝24:29:21:10、各補助巻
線の巻数比が第１の補助巻線：第２の補助巻線：第３の
補助巻線＝57:38:17にすることにより、始動時脈動トル
ク最低値を大きくすることが可能であり、特別な始動用
コンデンサを必要とせず、比較的小型の誘導電動機で大
きな始動トルクを発生することが可能となるため、安価
な誘導電動機を提供することができ、その実用的効果は
大なるものがある。As described above, in the electric motor according to the present invention, the rotor core having 26 slots, the stator core having 20 slots, and the first to fourth main windings are connected in series to the stator core slot. The main winding group connected and concentrically wound, and the first to third auxiliary windings are connected in series so that the centers of the main winding group and the main winding group are displaced from each other by 90 °, and the stator core is connected. A two-pole single-phase induction motor having a group of auxiliary windings concentrically wound in a slot, wherein a winding pitch of the first main winding and the first auxiliary winding is 9/10, and a second main winding. And the winding pitch of the second auxiliary winding is 7/10, the winding pitch of the third main winding and the third auxiliary winding is 5/10, and the winding pitch of the fourth main winding is 3 / 10,
And the winding ratio of each main winding is the first main winding: the second main winding:
3rd main winding: 4th main winding = 24: 29: 21: 10, the turns ratio of each auxiliary winding is 1st auxiliary winding: 2nd auxiliary winding: 3rd auxiliary winding = 57:38:17 makes it possible to increase the minimum value of the pulsating torque at the time of starting, without requiring a special starting capacitor and generating a large starting torque with a relatively small induction motor. Therefore, an inexpensive induction motor can be provided, and its practical effect is great.
第１図（ａ）は本発明の一実施例おける固定子を示す平
面図、第１図（ｂ）は同固定子を用いた誘導電動機の始
動時脈動トルクを示すグラフ、第２図は従来の誘導電動
機の始動時脈動トルクを示すグラフである。 １……固定子鉄心、2,3,4,5……固定子主巻線、6,7,8…
…固定子補助巻線、Ts……始動時脈動トルクの平均値、
Ts・min……始動時脈動トルクの最低値。FIG. 1 (a) is a plan view showing a stator according to an embodiment of the present invention, FIG. 1 (b) is a graph showing a pulsating torque at a start of an induction motor using the stator, and FIG. 3 is a graph showing the pulsating torque at the time of starting the induction motor of FIG. 1 ... Stator core, 2,3,4,5 ... Main stator winding, 6,7,8 ...
… Stator auxiliary winding, T s … Average value of pulsating torque at start,
T s · min …… Minimum value of pulsating torque at starting.
Claims (1)
数が20の固定子鉄心と、前記固定子鉄心スロットに第１
ないし第４の主巻線を直列に接続して同心巻きした主巻
線群と、前記主巻線群と互いの中心が90°ずれた位置と
なるように第１ないし第３の補助巻線を直列に接続して
前記固定子鉄心スロットに同心巻きした補助巻線群とを
有する２極単相誘導電動機であって、第１の主巻線およ
び第１の補助巻線の巻線ピッチが9/10、第２の主巻線お
よび第２の補助巻線の巻線ピッチが7/10、第３の主巻線
および第３の補助巻線の巻線ピッチが5/10、第４の主巻
線の巻線ピッチが3/10であり、かつ各主巻線の巻数比が
第１の主巻線：第２の主巻線：第３の主巻線：第４の主
巻線＝24:29:21:10、各補助巻線の巻数比が第１の補助
巻線：第２の補助巻線：第３の補助巻線＝57:38:17であ
ることを特徴とする誘導電動機。1. A rotor core having 26 slots, a stator core having 20 slots, and a first stator core slot.
To a fourth main winding connected in series and concentrically wound, and first to third auxiliary windings such that the centers of the main winding and the main winding are offset from each other by 90 ° A two-pole single-phase induction motor having a group of auxiliary windings connected in series and concentrically wound around the stator core slot, wherein the winding pitches of the first main winding and the first auxiliary winding are 9/10, the winding pitch of the second main winding and the second auxiliary winding is 7/10, the winding pitch of the third main winding and the third auxiliary winding is 5/10, the fourth The main winding has a winding pitch of 3/10, and the winding ratio of each main winding is first main winding: second main winding: third main winding: fourth main winding. Line = 24: 29: 21: 10, and the turn ratio of each auxiliary winding is first auxiliary winding: second auxiliary winding: third auxiliary winding = 57: 38: 17 Induction motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62210473A JP2537895B2 (en) | 1987-08-25 | 1987-08-25 | Induction motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62210473A JP2537895B2 (en) | 1987-08-25 | 1987-08-25 | Induction motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6455043A JPS6455043A (en) | 1989-03-02 |
| JP2537895B2 true JP2537895B2 (en) | 1996-09-25 |
Family
ID=16589923
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62210473A Expired - Fee Related JP2537895B2 (en) | 1987-08-25 | 1987-08-25 | Induction motor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2537895B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104935136B (en) * | 2015-06-18 | 2017-05-10 | 哈尔滨电气动力装备有限公司 | Groove matching structure of stator and rotor of 36-pole three-phase asynchronous motor |
-
1987
- 1987-08-25 JP JP62210473A patent/JP2537895B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6455043A (en) | 1989-03-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |