JPH0232777A - Protective control circuit of load - Google Patents
Protective control circuit of loadInfo
- Publication number
- JPH0232777A JPH0232777A JP1136059A JP13605989A JPH0232777A JP H0232777 A JPH0232777 A JP H0232777A JP 1136059 A JP1136059 A JP 1136059A JP 13605989 A JP13605989 A JP 13605989A JP H0232777 A JPH0232777 A JP H0232777A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- load
- circuit
- control circuit
- signal
- 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
- 230000001681 protective effect Effects 0.000 title 1
- 238000001514 detection method Methods 0.000 claims abstract description 13
- 230000002457 bidirectional effect Effects 0.000 abstract description 18
- 239000003990 capacitor Substances 0.000 abstract description 15
- 230000006378 damage Effects 0.000 abstract description 5
- 101150100333 FLS2 gene Proteins 0.000 abstract description 3
- 101150042939 FLS1 gene Proteins 0.000 abstract 1
- 238000005406 washing Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
Landscapes
- Motor And Converter Starters (AREA)
- Control Of Ac Motors In General (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は電動機等の負荷の運転を制御する電子式制御回
路に係り、特に、洗濯機用コンデンサ′１ｆ動機の様に
正転、逆転の運転を制御する電子式制御回路の素子の過
電圧からの保護に関する。[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to an electronic control circuit that controls the operation of a load such as an electric motor, and in particular, the present invention relates to an electronic control circuit that controls the operation of a load such as an electric motor. This invention relates to protecting elements of electronic control circuits that control operation from overvoltage.
従来の制御回路は第２図に示すように、電動機のコイル
（１）１１．コイル（２）１２の両端子間に運転用コン
デンサ１３を接続して、それぞれを双方向サイリスタＦ
ＬＳＩ、ＦＬＳ２に直列に接続し、正転、逆転運転の制
御を行っていた。ところが、コンデンサ１３の端子間電
圧は電源電圧の２倍近くになり、電源電圧の変動が大き
いとき。As shown in FIG. 2, the conventional control circuit includes a coil (1) 11. A driving capacitor 13 is connected between both terminals of the coil (2) 12, and each is connected to a bidirectional thyristor F.
It was connected in series to LSI and FLS2 to control forward and reverse rotation. However, the voltage between the terminals of the capacitor 13 is nearly twice the power supply voltage, and when the power supply voltage fluctuates greatly.
双方向サイリスタに過大電圧が印加され、しばしば破損
するという不具合があった。There was a problem that excessive voltage was applied to the bidirectional thyristor, which often caused damage.
上記従来技術は、運転用コンデンサ１３の端子間に生ず
る、電源電圧の２倍近い電圧が、電動機１の運転中に於
いて、非導通状態にある双方向サイリスタの異極端子間
に印加され、電源電圧が、所定の電圧以上に高くなって
しまったり、電圧波形の歪によって波高値が異常に高く
なって、前記、非導通側双方向サイリスタに過剰電圧が
印加されて、破損してしまうことからの防護が施されて
なく、特に、電源電圧が２００Ｖ以上の高電圧地域に於
ける素子の破損という問題があった。In the above-mentioned conventional technology, a voltage nearly twice the power supply voltage generated between the terminals of the operating capacitor 13 is applied between different pole terminals of the bidirectional thyristor which is in a non-conducting state while the motor 1 is operating. When the power supply voltage becomes higher than a predetermined voltage or when the peak value becomes abnormally high due to voltage waveform distortion, excessive voltage is applied to the non-conducting side bidirectional thyristor and it is damaged. There was a problem that the device could be damaged, especially in high-voltage areas where the power supply voltage is 200V or higher.
本発明の目的は、双方向サイリスタの端子間に過大電圧
が印加され、素子の破壊されることを防止することにあ
る。An object of the present invention is to prevent the device from being destroyed due to excessive voltage being applied between the terminals of a bidirectional thyristor.
〔課題を解決するための手段〕
上記の目的は、電動機１の運転用コンデンサ１３の端子
間に発生する電圧が、電源の電圧に一次比例することか
ら、電源の電圧を検知し、電動機１の特性に合わせた、
所定の電圧を設定し、この電圧以上の電圧が入力された
ら、電動機運転制御用の双方向サイリスタＦＬＳＩ、Ｆ
ＬＳ２のいずれかをも、点弧させず、すなわち電動機［
のコイル（１）１１．コイル（２）１２のいずれにも電
圧印加をさせず、運転用コンデンサ１３の端子間に高電
圧を発生させないことにより、電源電圧の異常過大電圧
による制御回路の素子の破壊からの防護を行うことによ
り達成されろ。[Means for Solving the Problem] The above purpose is to detect the voltage of the power supply and detect the voltage of the motor 1, since the voltage generated between the terminals of the operating capacitor 13 of the motor 1 is linearly proportional to the voltage of the power supply. According to the characteristics,
When a predetermined voltage is set and a voltage higher than this voltage is input, the bidirectional thyristor FLSI, F for motor operation control is activated.
Neither LS2 is fired, i.e. the electric motor [
Coil (1) 11. By not applying voltage to any of the coils (2) 12 and by not generating high voltage between the terminals of the operating capacitor 13, the elements of the control circuit are protected from destruction due to abnormal overvoltage of the power supply voltage. be achieved by.
電動機１の運転を制御する双方向サイリスタ（ＦＬＳＩ
、ＦＬＳ２）の非導通側の端子間には運転用コンデンサ
１３の端子間に発生する電圧が印加される。このコンデ
ンサ１３の端子間電圧は電動機１の仕様が決まれば、電
源電圧に比例して発生する故、電源電圧の大きさから、
コンデンサ１３の端子間電圧を推定することができる。A bidirectional thyristor (FLSI) controls the operation of electric motor 1.
, FLS2), the voltage generated between the terminals of the operating capacitor 13 is applied between the terminals on the non-conducting side. Once the specifications of the motor 1 are determined, the voltage between the terminals of this capacitor 13 is generated in proportion to the power supply voltage.
The voltage between the terminals of the capacitor 13 can be estimated.
これ故、電源電圧が所定の大きさ以上になったら、電動
機１の運転制御用の双方向サイリスタ（ＦＬＳＩ、ＦＬ
Ｓ２）を導通させなければ、電動機１は運転されず、運
転用コンデンサ１３の端子間に高い電圧が発生すること
がなくなり、双方向サイリスタの端子間に高電圧を印加
することがなく、過電圧破壊から防護することができる
。Therefore, when the power supply voltage exceeds a predetermined level, the bidirectional thyristor (FLSI, FL
If S2) is not made conductive, the motor 1 will not operate, high voltage will not be generated between the terminals of the operating capacitor 13, high voltage will not be applied between the terminals of the bidirectional thyristor, and overvoltage damage will occur. can be protected from.
以下、本発明の一実施例を第１図、第２図により説明す
る。An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.
電気洗濯機に於ける洗濯用翼の駆動用電動機は高頻度な
正転、逆転の繰返し運転を必要とするため、第２図に示
すように、主コイルと補助コイルを交互に切替えて使う
ことにより正転、逆転運転をする■形結線の電動機１を
用いるのが一般的である。このＶ形結線の電！Ｉ！Ｉ］
機１はその巻線のコイル（１）とコイル（２）は同巻数
、もしくはほぼ同巻数であり、第２図の結線図からも明
らかな様に、単巻トランスと等価であり、電動機１のコ
イル（１）１１とコイル（２）１２の間に接続する運転
用コンデンサ１３の端子間に発生する電圧は電動機１に
印加する電圧の約２倍に近い電圧が発生する。The electric motor that drives the washing blades in electric washing machines requires frequent forward and reverse rotation, so the main coil and auxiliary coil must be switched alternately as shown in Figure 2. It is common to use an electric motor 1 with a ■-type wire connection, which rotates in the forward direction and in the reverse direction. This V-type wire connection! I! I]
Coil (1) and coil (2) of machine 1 have the same number of turns, or almost the same number of turns, and as is clear from the wiring diagram in Figure 2, they are equivalent to a single-turn transformer, and motor 1 The voltage generated between the terminals of the operating capacitor 13 connected between the coil (1) 11 and the coil (2) 12 is approximately twice the voltage applied to the motor 1.
マイクロコンピュータを使った中央制御回路を有する電
子式制御方式に於いては、電動機１の運転制御のための
電源の断続は一般に双方向サイリスタ（ＦＬＳＩ、ＦＬ
Ｓ２）を用いて行われ、電動機１が運転状態にあり、コ
ンデンサ１３の端子間に倍電圧が発生しているときは、
非導通側の双方向サイリスタのＴＩ端子、Ｔ２端子間に
は、コンデンサ１３に印加されていると同等の端子電圧
が印加される。今もし、電源電圧に２５０Ｖの高電圧を
使用するとき、非導通側双方向サイリスタの端子間には
約倍電圧の５００Ｖに近い電圧が印加され、その電圧ピ
ーク値は７００Ｖに達し１通常市販されている民生用双
方向サイリスタの電圧定格を上まわり、電圧破壊され、
導通状態になってしまい、電動機１には正転、逆転の電
源が同時に投入されたことになり、′ｉ′！動係１は拘
束され、過熱され、ついには焼損することになる。In electronic control systems that have a central control circuit using a microcomputer, the power supply for controlling the operation of the motor 1 is generally controlled by a bidirectional thyristor (FLSI, FL).
S2), and when the motor 1 is in operation and a doubled voltage is generated between the terminals of the capacitor 13,
A terminal voltage equivalent to that applied to the capacitor 13 is applied between the TI terminal and the T2 terminal of the bidirectional thyristor on the non-conducting side. If a high voltage of 250V is used as the power supply voltage, a voltage close to 500V, which is about double the voltage, will be applied between the terminals of the non-conducting bidirectional thyristor, and the voltage peak value will reach 700V, which is normally not available on the market. If the voltage exceeds the voltage rating of the consumer bidirectional thyristor, the voltage will be destroyed.
This results in a conductive state, and the electric motor 1 is powered on for forward and reverse rotation at the same time, and 'i'! The drive train 1 becomes constrained, overheats, and eventually burns out.
また、電圧の波形がひずんで、電圧ピーク値だけが高い
場合、実効電圧が高くなくても双方向すイリスタの破壊
を招き、電動機１の焼結になる。Further, if the voltage waveform is distorted and only the voltage peak value is high, the bidirectional iris will be destroyed and the motor 1 will be sintered even if the effective voltage is not high.
上記の過電圧から素子の破壊を防ぎ、かつ電動機１の焼
損を防ぐため、本発明では電子制御部に第１図に示すよ
うに、電圧波形検知回路と過電圧検知回路を設け、負荷
や素子に過電圧が印加されないようにしている。In order to prevent the elements from being destroyed due to the above-mentioned overvoltage and also to prevent burnout of the motor 1, the electronic control section of the present invention is provided with a voltage waveform detection circuit and an overvoltage detection circuit as shown in FIG. is not applied.
この働きを第１図により説明する。商用交流電源から、
電子回路駆動用に、電源回路で直流を作り、マイクロコ
ンピュータなどから構成される中央制御回路をはじめ、
各回路に供給される。入力部より、操作者により、動作
信号が入力されると、予め組込まれているプログラムに
よって、負荷を制御駆動し、かつ表示部に所定の表示を
するが、商用交流電源の波形を電圧波形検知回路に取込
み、電圧がＯＶ近傍で、ゼロクロスＯＮ回路より、負荷
駆動を許可する信号が出、電圧波形のピーク値が予め設
定された電圧より低い場合に限り、過電圧検知回路より
負荷駆動を許可する信号が出、先のゼロクロスＯＮ信号
と組合わされて、双方の駆動許可信号がある場合にのみ
、駆動許可信号が増幅回路に送り込まれる。増幅回路で
は、中央制御回路からの負荷駆動信号を受けて、前述の
駆動信号がある場合にだけ、スイッチ回路に駆動信号を
増幅して送り込む。この増幅回路からの駆動信号により
、負荷の運転制御を行う。今、電圧波形検知回路を経由
して、過電圧検知回路に取込まれた電圧波形のピーク値
が予め設定された電圧より高い場合は、負荷駆動を許可
する信号が出ないため、中央制御回路から駆動信号が出
ても、増幅回路に駆動許可信号が入力されないため、ス
イッチ回路に駆動信号が入力されず、負荷は動かない。This function will be explained with reference to FIG. From commercial AC power supply,
To drive electronic circuits, a power supply circuit generates direct current, and a central control circuit consisting of a microcomputer, etc.
Supplied to each circuit. When an operating signal is input by the operator from the input unit, the load is controlled and driven according to a pre-installed program, and a predetermined display is displayed on the display unit. When the voltage is in the vicinity of OV, the zero-cross ON circuit outputs a signal to permit load driving, and only when the peak value of the voltage waveform is lower than a preset voltage, the overvoltage detection circuit permits load driving. The signal is output and combined with the previous zero-cross ON signal, the drive enable signal is sent to the amplifier circuit only if both drive enable signals are present. The amplifier circuit receives the load drive signal from the central control circuit, amplifies the drive signal, and sends the amplified drive signal to the switch circuit only when the aforementioned drive signal is present. The drive signal from this amplifier circuit controls the operation of the load. Now, if the peak value of the voltage waveform taken into the overvoltage detection circuit via the voltage waveform detection circuit is higher than the preset voltage, the central control circuit will not output a signal to permit load driving. Even if the drive signal is output, the drive permission signal is not input to the amplifier circuit, so the drive signal is not input to the switch circuit, and the load does not move.
従って、負荷の運転によって発生する高電圧が発生せず
、制御回路のスイッチ回路に用いる双方向サイリスタ等
の電力素子は過電圧を受けることがなく、破壊から免れ
る。Therefore, high voltage generated by the operation of the load is not generated, and power elements such as bidirectional thyristors used in the switch circuit of the control circuit are not subjected to overvoltage and are protected from destruction.
本発明によれば、負荷の特性、電動機１の特性。 According to the invention, the characteristics of the load, the characteristics of the motor 1.
電子式制御回路の素子の特性に応じて、過電圧検知回路
の判定電圧を定めることができ、かつ、商用交流電圧の
波形を取り込むことで、実効電圧に関係なく、波高値を
とらえて判定することによって、過大な電源電圧から、
電子式制御回路の素子を守り、過電圧破壊を防止するこ
とにより、負荷の焼損や、危険な運転を防止でき、シス
テムの保全を計れるという効果がある。The judgment voltage of the overvoltage detection circuit can be determined according to the characteristics of the elements of the electronic control circuit, and by capturing the waveform of the commercial AC voltage, the peak value can be determined regardless of the effective voltage. From excessive power supply voltage,
By protecting the electronic control circuit elements and preventing overvoltage breakdown, it is possible to prevent load burnout and dangerous operation, thereby ensuring system integrity.
第１図は本発明の一実施例の電気式洗濯機の制御回路の
ブロック図、第２図は電気式洗濯機の制御回路のうち洗
濯用電動機の正転、逆転の制御回路図である。
１・・・電動機、１１・・・コイル（１）、１２・・・
コイル（２）、１３・・コンデンサ、１４・・・コイル
。FIG. 1 is a block diagram of a control circuit of an electric washing machine according to an embodiment of the present invention, and FIG. 2 is a control circuit diagram of the control circuit for forward and reverse rotation of a washing motor in the control circuit of an electric washing machine. 1... Electric motor, 11... Coil (1), 12...
Coil (2), 13... Capacitor, 14... Coil.
Claims (1)
、過電圧検知回路を設け、電源の電圧が所定電圧以上に
なつたのを過電圧検知回路で検知して電源スイッチをＯ
ＦＦさせることを特徴とする負荷の保護制御回路。 ２、請求の範囲第１項記載のものにおいて、過電圧検知
回路から出力される過電圧信号が、中央制御回路から出
力される電動等の負荷の運転信号を打消すように組合わ
される回路を有することを特徴とする負荷の制御回路。 ３、請求の範囲第１項記載のものにおいて、電圧波形検
知回路より、ゼロクロスＯＮ信号回路の入力、及び、過
電圧検知回路の入力をとり、それぞれの出力を否定論理
和により重ね合わせて、中央制御回路から出力される電
動機等の負荷の運転信号を打消すように組合わされるこ
とを特徴とする負荷の制御回路。 ４、特許請求の範囲第１項記載のものにおいて、電動機
の主コイルと補助コイルを交互に使いわけて正転、逆転
の制御を実行する制御回路に、過電圧検知回路を設け、
過剰電圧のときに、電動機等の負荷の運転を行わせない
ようにしたことを特徴とする負荷の制御回路。[Claims] 1. An overvoltage detection circuit is provided in the load protection control circuit where operation control is performed, and when the overvoltage detection circuit detects that the voltage of the power supply exceeds a predetermined voltage, the power switch is turned off.
A load protection control circuit characterized in that it is turned off. 2. The device according to claim 1 has a circuit that is combined in such a way that the overvoltage signal output from the overvoltage detection circuit cancels the driving signal of the electric load, etc. output from the central control circuit. A load control circuit featuring: 3. In the device described in claim 1, the input of the zero cross ON signal circuit and the input of the overvoltage detection circuit are taken from the voltage waveform detection circuit, and the respective outputs are superimposed by NOR, and the central control is performed. 1. A load control circuit characterized in that the circuit is combined so as to cancel an operation signal for a load such as an electric motor outputted from the circuit. 4. In the item described in claim 1, an overvoltage detection circuit is provided in the control circuit that alternately uses the main coil and the auxiliary coil of the motor to control forward rotation and reverse rotation,
A load control circuit characterized in that a load such as an electric motor is not operated in the event of excessive voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1136059A JPH0232777A (en) | 1989-05-31 | 1989-05-31 | Protective control circuit of load |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1136059A JPH0232777A (en) | 1989-05-31 | 1989-05-31 | Protective control circuit of load |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0232777A true JPH0232777A (en) | 1990-02-02 |
Family
ID=15166237
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1136059A Pending JPH0232777A (en) | 1989-05-31 | 1989-05-31 | Protective control circuit of load |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0232777A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4856280B1 (en) * | 2011-06-03 | 2012-01-18 | 等 川上 | scissors |
-
1989
- 1989-05-31 JP JP1136059A patent/JPH0232777A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4856280B1 (en) * | 2011-06-03 | 2012-01-18 | 等 川上 | scissors |
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