JPS60152291A - Condenser motor - Google Patents

Abstract

PURPOSE:To prevent a reverse electromagnetic torque from occurring due to the interruption of a condenser motor by connecting a resistor with both ends of the capacitor during the interruption of a power source, thereby reducing the winding remaining current. CONSTITUTION:A resistor rdc is connected in series through a bidirectional thyristor SW2 at both ends of a condenser motor C. The thyristor SW2 becomes ON during the interruption of the power source, a resistor is connected with both ends of the capacitor, and a current Ir is flowed to the resistor. Accordingly, the energy stored in the capacitor is heat-dissipated by a self-exciting phenomenon, and the winding remaining currents IM, IA at the power source interruption time can be abruptly attenuated. Then, even if the power source is again energized, no remaining current exists in the winding. Thus, the winding current does not increase at the energizing moment, and the reverse electromagnetic torque can be therefore prevented.

Description

【発明の詳細な説明】 〔発明の利用分野〕 本発明はコンデンサモータに係り、特に断続運転に好適
な固定子巻線回路に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a capacitor motor, and particularly to a stator winding circuit suitable for intermittent operation.

〔発明の背景〕[Background of the invention]

コンデンサモータで定格運転時でもコンデンサを巻線に
接続するコンデンサランモータの巻線回路は第１図に示
すように、固定子巻線は主巻線Ｍとこれと空間的に位相
差を有して配置される補助巻線Ａと、該補助巻線と直列
にコンデンサＣが接続されてなる。また回転子は一般に
かご彩画転子Ｒが用いられる。As shown in Figure 1, the winding circuit of a capacitor run motor, in which the capacitor is connected to the winding even during rated operation of the capacitor motor, has a spatial phase difference between the stator winding and the main winding M. A capacitor C is connected in series with the auxiliary winding A and the auxiliary winding. In addition, the rotor is generally a cage-saiga trochanter R.

コンチンサランモータはファン、ポンプ等を駆動するモ
ータとして拡く使用されているが、第２図で示す短い時
間（１５ｅｃ８度）の電源中断（ｔ。Contin Saran motors are widely used as motors that drive fans, pumps, etc., and the power is interrupted for a short time (15ec8 degrees) as shown in Figure 2 (t).

〜１＋　）を伴う断続運転を行った場合、電源再投入時
１．において回転方向ｗ、とは逆の゛電磁トルクＴＲが
異常に発生する。この／こめ軸耐力を必要以上に太きく
した設計をしなければならないという欠点があった。~1+), when the power is turned on again, 1. , an electromagnetic torque TR opposite to the rotational direction w is abnormally generated. There was a drawback in that the design had to have a larger shaft bearing capacity than necessary.

〔発明の目的〕[Purpose of the invention]

本発明の目的は断続運転によって発生する逆トルクが小
さいコンデンサランモータを提供することにある。SUMMARY OF THE INVENTION An object of the present invention is to provide a capacitor run motor in which reverse torque generated by intermittent operation is small.

〔発明の概要〕[Summary of the invention]

コンデンサランモータの断続運転時における逆トルクの
発生原因は、電源中断時における巷線回路電流ＩＮ、Ｉ
Ａがコンデンサによる自励現象でいつまでも残留し、こ
の残留電流によって電源再投入瞬時の巻線電流が上昇す
るためとわかった。The cause of reverse torque during intermittent operation of a capacitor run motor is the main line circuit currents IN and I when the power supply is interrupted.
It turns out that this is because A remains indefinitely due to the self-excitation phenomenon caused by the capacitor, and this residual current causes the winding current to rise at the moment the power is turned on again.

そこで本発明では電源中断時の巻線電流を早く減衰する
方法として、中断期間中のみコンデンサに抵抗を接続し
、コンデンサエネルギーを放出するようにした。Therefore, in the present invention, as a method of quickly attenuating the winding current when the power supply is interrupted, a resistor is connected to the capacitor only during the interruption period, and the capacitor energy is released.

〔発明の実施例〕[Embodiments of the invention]

以下、本発明の一実施例を第３図及び第４図により説明
する。本発明のコンデンサランモータの巻線回路の構成
は第１図で示した巻線回路に加えたコンデンサＣの両端
に抵抗ｒ、。をスイッチＳＷ２、ここでは双方向性サイ
リスタを直列に介して接続する。またサイリスタのゲー
）ＧＫは電源のＯＮ。An embodiment of the present invention will be described below with reference to FIGS. 3 and 4. The configuration of the winding circuit of the capacitor run motor of the present invention is as shown in FIG. are connected in series through a switch SW2, here a bidirectional thyristor. Also, thyristor game) GK is powered on.

ＯＦＦを検出する素子１、電源（Ｊ　Ｎ　−ＯＦ　Ｆ反
転回路２、ゲート１ｇ号発生回路３及びゲート電源４が
接続されてなる。ここでスイッチＳＷ２の動作は第４図
で示すように、電源のＯＮ、ＯＦＦとは逆となるように
設定する。すなわちＳＷ２を構成するサイリスタのゲー
ト信号が電源ＯＮ時はＯＦＦに、電源ＯＦＦ時はＯＮと
なるようにする１゜本構成回路によれば、電源中断期間
（ｔｏ〜１＋）にはコンデンサ両端に抵抗が接続され、
この抵抗に電流■１がバイパスして流れることから、自
励現象によってコンデンサに蓄積するエイ・ルギが抵抗
によって放熱され、電源中断時における巻線残留電流Ｉ
Ｍ、ＩＡを急速に減衰させることができる。そしてその
後、電源が再投入されても巻線には残留電流がないこと
から投入瞬時における巻線電流の増加はなくしたがって
、逆電磁トルクの発生が防市できるという効果がある。An element 1 for detecting OFF, a power supply (JN-OFF inverting circuit 2, a gate 1g generation circuit 3, and a gate power supply 4 are connected to each other.The operation of the switch SW2 is as shown in FIG. 4. According to this configuration circuit, the gate signal of the thyristor constituting SW2 is set to be OFF when the power is ON and ON when the power is OFF. During the power interruption period (to~1+), a resistor is connected across the capacitor,
Since the current 1 bypasses and flows through this resistor, the energy accumulated in the capacitor due to the self-excitation phenomenon is dissipated by the resistor, and the winding residual current I when the power supply is interrupted.
M, IA can be rapidly attenuated. Thereafter, even when the power is turned on again, since there is no residual current in the winding, there is no increase in the winding current at the instant of turning on, and therefore, there is an effect that generation of reverse electromagnetic torque can be prevented.

また、他の実施例としては第５図に示すように、スイッ
チＳＷ２を電源ＯＦ　ＦでＳＷ２がＯＮとなるＢ接点の
コンタクタに置換えている。この場合には回路構成が簡
単となる。In another embodiment, as shown in FIG. 5, the switch SW2 is replaced with a B-contact contactor that turns on the switch SW2 when the power is turned off. In this case, the circuit configuration becomes simple.

なお、抵抗ｒｄｅは第５図の破線で示すようにコンデン
サと並列に接続するのではなく、補助巻線も宮めて並列
に接続しても同様な効果は得られることはもちろんであ
る。It goes without saying that the same effect can be obtained even if the resistor rde is not connected in parallel with the capacitor as shown by the broken line in FIG. 5, but is also connected in parallel with the auxiliary winding.

さらに、他の実施例として第６図はコンデンサを始動時
のみ使用するコンデンサ始動形モータについ′Ｃ示１−
だものである。スイッチＳＷ３は始動時には■の方に接
続されており定格速度近くになると切り離され、スイッ
チ８Ｗ３は＠と接続し、コンデンサＣと並列に抵抗ｒｄ
ｏが接続される。従来は切離きれたコンデンサには抵抗
を接続しないために、電荷は残ったままとなり、一旦電
源が中断し再始動を行った場合には、先に述べたコンデ
ンサランモータと同様す逆電磁トルクが発生するが、本
発明によりこの問題は解消される。Furthermore, as another embodiment, FIG.
It is something. Switch SW3 is connected to ■ at startup, and disconnected when the speed approaches the rated speed, switch 8W3 is connected to @, and resistor rd is connected in parallel with capacitor C.
o is connected. Conventionally, a resistor is not connected to a disconnected capacitor, so the charge remains, and when the power is interrupted and restarted, a reverse electromagnetic torque similar to the capacitor run motor mentioned above is generated. However, the present invention solves this problem.

〔発明の効果〕〔Effect of the invention〕

本発明によれば、原因となる’ＦＪＥ源中断時の巻線残
留電流を減少することができるので、コンデンサランモ
ータの断続運転による逆の電磁トルクを防止できる効果
がある。According to the present invention, it is possible to reduce the residual current in the winding when the 'FJE source is interrupted, which is the cause, and therefore it is possible to prevent reverse electromagnetic torque due to intermittent operation of the capacitor run motor.

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

第１図は従来のコンデンサランモータの巻線回路図、第
２図はコンデンサランモータを断続運転し・た時の巻線
電流とトルクの波形図、第３図は不発、−の一実施例を
示すコンデンサランモータの巻線構成回路図、第４図は
断続運転時の巻線電流波形図、第５図及び第６図は本発
明の他の実施例を示す構成図である。 Ｍ・・・主巻線、Ａ・・・補助巻線、Ｃ・・・コンデン
サ、ｒｄ。・・・抵抗。　、／で＼、 第　ｌ　図 第２図 第３図 第４図 第Ｓ　図 第６図 ｗ３Figure 1 is a winding circuit diagram of a conventional capacitor run motor, Figure 2 is a waveform diagram of the winding current and torque when the capacitor run motor is operated intermittently, and Figure 3 is an example of a misfire. FIG. 4 is a winding current waveform diagram during intermittent operation, and FIGS. 5 and 6 are configuration diagrams showing other embodiments of the present invention. M...Main winding, A...Auxiliary winding, C...Capacitor, rd. ···resistance. , /de＼, Figure l Figure 2 Figure 3 Figure 4 Figure S Figure 6 w3

Claims (1)

【特許請求の範囲】 ■、主巻線とこれと空間的に位相差を有して配置される
補助巻線と該補助巻線と直列にコンデンサを設けた固定
子巻線回路において、運転中電源が中断した期間のみコ
ンデンサと並列に抵抗を接続したことを特徴とするコン
デンサモータ。 ２、特許請求の範囲！＜　１項において、コンデンサが
運転中は電源から切離される固定子巻線回路で該コンデ
ンサが切離された期間のみコンデンサと並列に抵抗を接
続したことを１！３゛徴とするコンデンサモータ。[Claims] (1) In a stator winding circuit including a main winding, an auxiliary winding disposed with a spatial phase difference from the main winding, and a capacitor provided in series with the auxiliary winding, during operation. A capacitor motor characterized in that a resistor is connected in parallel with the capacitor only during periods when the power supply is interrupted. 2. Scope of claims! < The capacitor motor according to item 1, characterized in that the stator winding circuit is disconnected from the power supply during operation, and a resistor is connected in parallel with the capacitor only during the period when the capacitor is disconnected.