JPH0582776B2 - - Google Patents
Info
- Publication number
- JPH0582776B2 JPH0582776B2 JP57184524A JP18452482A JPH0582776B2 JP H0582776 B2 JPH0582776 B2 JP H0582776B2 JP 57184524 A JP57184524 A JP 57184524A JP 18452482 A JP18452482 A JP 18452482A JP H0582776 B2 JPH0582776 B2 JP H0582776B2
- Authority
- JP
- Japan
- Prior art keywords
- resistor
- circuit
- photocoupler
- capacitor
- transistor
- 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 - Lifetime
Links
- 230000008878 coupling Effects 0.000 claims description 32
- 238000010168 coupling process Methods 0.000 claims description 32
- 238000005859 coupling reaction Methods 0.000 claims description 32
- 230000003287 optical effect Effects 0.000 claims description 32
- 239000003990 capacitor Substances 0.000 claims description 30
- 238000009499 grossing Methods 0.000 claims description 6
- 230000007423 decrease Effects 0.000 claims description 5
- 230000018199 S phase Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/16—Modifications for eliminating interference voltages or currents
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
- H03K17/78—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used using opto-electronic devices, i.e. light-emitting and photoelectric devices electrically- or optically-coupled
- H03K17/79—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used using opto-electronic devices, i.e. light-emitting and photoelectric devices electrically- or optically-coupled controlling bipolar semiconductor switches with more than two PN-junctions, or more than three electrodes, or more than one electrode connected to the same conductivity region
Description
【発明の詳細な説明】
〔発明の利用分野〕
本発明は、スイツチング回路に係り、特に複数
のスイツチング素子が同時に導通することを防止
するに好適なスイツチング回路に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a switching circuit, and particularly to a switching circuit suitable for preventing a plurality of switching elements from becoming conductive at the same time.
トランジスタ、サイリスタ、トライアツクなど
のスイツチング素子複数個で構成されたスイツチ
ング回路では、複数個のスイツチング素子が同時
に導通した場合、（以後クロスカレントと称す）
短絡状態となり重大な事故に陥るものが多い。プ
ツシユプル回路、３相モータの正転、逆転制御回
路ではこの種の事故が起こる例が多い。従来、こ
のクロスカレントを防止する手段としては、例え
ば第１図に示すように光結合素子を用いてインタ
ーロツクで入力信号が同時に入るのを防止するこ
とが行われていた。これに関連するものとして特
開昭58−188932号公報が挙げられる。しかし、サ
イリスタ、トライアツクなどのように、制御電極
の信号が取り去られても主電極電流が残る性質の
素子の場合、又、入力信号が個有の時定数で減衰
する場合には入力信号号制御による防止は困難で
あつた。
In a switching circuit composed of multiple switching elements such as transistors, thyristors, and triaxes, when multiple switching elements become conductive at the same time (hereinafter referred to as cross current),
There are many cases where short circuits occur, resulting in serious accidents. This kind of accident often occurs in push-pull circuits, forward rotation and reverse rotation control circuits of three-phase motors. Conventionally, as a means for preventing this cross current, for example, as shown in FIG. 1, an optical coupling element is used to prevent input signals from entering simultaneously by interlocking. Related to this is Japanese Patent Application Laid-open No. 188932/1983. However, in the case of devices such as thyristors and triacs in which the main electrode current remains even when the control electrode signal is removed, or when the input signal attenuates with its own time constant, the input signal Prevention through control was difficult.
本発明は、スイツチング素子の制御信号入力回
路でクロスカレントを防止するとともに、スイツ
チング素子の非導通遅れに対応できるスイツチン
グ回路を提供することにある。
SUMMARY OF THE INVENTION An object of the present invention is to provide a switching circuit that prevents cross current in a control signal input circuit for a switching element and can cope with a delay in non-conduction of a switching element.
本発明は、特許請求の範囲に記載の構成によ
り、インターロツク回路の光結合素子の発光部の
回路に供給する電圧とトライアツクのトリガ回路
の光結合素子の発光部に供給する電圧を、平滑コ
ンデンサの電圧が低下しトリガ回路の光結合素子
の発光部の電流がトライアツクの最小トリガ電流
以下になつてもインターロツク回路の光結合素子
の発光部の電流を一定時間流せる値となるよう設
定し、トライアツクが非導通となつてから正転・
逆転の切換を行うことを特徴とするものである。
According to the structure described in the claims, the voltage supplied to the circuit of the light emitting part of the optical coupling element of the interlock circuit and the voltage supplied to the light emitting part of the optical coupling element of the trigger circuit of the triax are connected to the smoothing capacitor. is set to a value that allows the current to flow through the light emitting part of the optical coupling element of the interlock circuit for a certain period of time even if the voltage of the interlock circuit decreases and the current of the light emitting part of the optical coupling element of the trigger circuit becomes less than the minimum trigger current of the triack; After the triax becomes non-conductive, it rotates forward.
It is characterized by performing reverse switching.
以下、本発明の一実施例を第２図を用いて説明
する。
An embodiment of the present invention will be described below with reference to FIG.
本実施例は、三相モータの正転・逆転を行なう
ものである。本実施例は第１図に示すように、正
転回路３９と逆転回路４０を備えている。 In this embodiment, a three-phase motor rotates forward and reverse. As shown in FIG. 1, this embodiment includes a forward rotation circuit 39 and a reverse rotation circuit 40.
正転回路回路３９は、第１のスイツチとしての
スイツチ２を介して単相交流電源１に接続され、
このスイツチ２に接続された第１の全波整流回路
としてのダイオードスタツク５と、このダイオー
ドスタツク５の出力を平滑する第１のコンデンサ
としてのコンデンサ７を有している。このコンデ
ンサ７には、第１の光結合素子の発光部１５ａと
第１の抵抗器としての抵抗９との直列回路が接続
され、この直列回路と並列に、コンデンサ７の正
極側に一端が接続されてその両端に電位差を発生
させる第２の抵抗器としての抵抗１１と、エミツ
タがコンデンサ７の負極に接続されてそのベー
ス・エミツタ間に第３の抵抗器としての抵抗２１
が接続されるとともにそのコレクタが第４の抵抗
器としての抵抗１３を介して抵抗１１の他端に接
続された第１のトランジスタとしてのトランジス
タ１７およびこのトランジスタ１７のコレクタお
よびベースにそれぞれベースとエミツタが接続さ
れた第２のトランジスタとしてのトランジスタ１
９からなる第１の定電流回路と、このトランジス
タ１７のコレクタ・エミツタ間に並列に接続され
た第２の光結合素子の受光部１６ｂと、上記トラ
ンジスタ１９のコレクタと抵抗１１との間に接続
された第３の光結合素子の発光部２３ａと第４の
光結合素子の発光部２５ａとの直列回路とより成
る回路が接続される。第３の光結合素子の受光部
２３ｂには第１のゼロクロス回路３１が接続さ
れ、この第１のゼロクロス回路３１の出力は第１
のトライアツクとしてのトライアツク３５の制御
電極に接続される。第４の光結合素子の受光部２
５ｂには第２のゼロクロス回路３２が接続され、
この第２のゼロクロス回路３２の出力は第２のト
ライアツクとしてのトライアツク３６の制御電極
が接続される。 The normal rotation circuit 39 is connected to the single-phase AC power supply 1 via the switch 2 as a first switch,
It has a diode stack 5 as a first full-wave rectifier circuit connected to this switch 2, and a capacitor 7 as a first capacitor for smoothing the output of this diode stack 5. A series circuit of the light emitting part 15a of the first optical coupling element and a resistor 9 as a first resistor is connected to this capacitor 7, and one end is connected to the positive electrode side of the capacitor 7 in parallel with this series circuit. a resistor 11 as a second resistor whose emitter is connected to the negative electrode of the capacitor 7 and whose emitter is connected to the negative electrode of the capacitor 7 to generate a potential difference between its ends, and a resistor 21 as a third resistor between its base and emitter.
A transistor 17 is connected as a first transistor, and its collector is connected to the other end of the resistor 11 via a resistor 13 as a fourth resistor, and a base and an emitter are connected to the collector and base of this transistor 17, respectively. Transistor 1 as the second transistor connected to
9, the light receiving section 16b of the second photocoupler connected in parallel between the collector and emitter of the transistor 17, and the collector of the transistor 19 and the resistor 11. A circuit consisting of a series circuit of the light emitting part 23a of the third optical coupling element and the light emitting part 25a of the fourth optical coupling element is connected. A first zero cross circuit 31 is connected to the light receiving section 23b of the third optical coupling element, and the output of this first zero cross circuit 31 is connected to the first zero cross circuit 31.
The control electrode of the triax 35 is connected to the control electrode of the triax. Light receiving section 2 of the fourth optical coupling element
A second zero cross circuit 32 is connected to 5b,
The output of the second zero-cross circuit 32 is connected to a control electrode of a triax 36 as a second triax.
一方、逆転回路４０は、第２のスイツチとして
のスイツチ３を介して単相交流電源１に接続さ
れ、このスイツチ３に接続された第２の全波整流
回路としてのダイオードスタツク６と、このダイ
オードスタツク６の出力を平滑する第２のコンデ
ンサとしてのコンデンサ８を有している。このコ
ンデンサ８には、第２の光結合素子の発光部１６
ａと第５の抵抗器としての抵抗１０との直列回路
が接続され、この直列回路と並列に、コンデンサ
８の正極側に一端が接続されてその両端に電位差
を発生させる第６の抵抗器としての抵抗１２と、
エミツタがコンデンサ８の負極に接続されたその
ベース・エミツタ間に第７の抵抗器としての抵抗
２２が接続されるとともにそのコレクタが第８の
抵抗器としての抵抗１４を介して抵抗１２の他端
に接続された第３のトランジスタとしてのトラン
ジスタ１８およびこのトランジスタ１８のコレク
タおよびベースにそれぞれベースとエミツタが接
続された第４のトランジスタとしてのトランジス
タ２０からなる第２の定電流回路と、このトラン
ジスタ１８のコレクタ・エミツタ間に並列に接続
された第１の光結合素子の受光部１５ｂと、上記
トランジスタ２０のコレクタと抵抗１２との間に
接続された第５の光結合素子の発光部２４ａと第
４の光結合素子の発光部２６ａとの直列回路とよ
り成る回路が接続される。トライアツク３５，３
６，３７，３８は、一般にその制御回路がゼロ電
圧近傍で導通する所謂ゼロクロス回路となつてお
り、入力回路は交流入力をコンデンサインプツト
により平滑し、トランジスタ１７，１９，１８，
２０により定電流回路としている。 On the other hand, the reversing circuit 40 is connected to the single-phase AC power supply 1 via a switch 3 as a second switch, and includes a diode stack 6 as a second full-wave rectifier circuit connected to this switch 3, and a diode stack 6 as a second full-wave rectifier circuit connected to this switch 3. A capacitor 8 is provided as a second capacitor for smoothing the output of the diode stack 6. This capacitor 8 has a light emitting section 16 of a second optical coupling element.
A and a resistor 10 as a fifth resistor are connected in series, and in parallel with this series circuit, one end is connected to the positive electrode side of the capacitor 8, and a sixth resistor is used to generate a potential difference between the two ends. a resistance 12,
A resistor 22 as a seventh resistor is connected between the base and emitter of which the emitter is connected to the negative electrode of the capacitor 8, and the collector is connected to the other end of the resistor 12 through a resistor 14 as an eighth resistor. a second constant current circuit consisting of a transistor 18 as a third transistor connected to a transistor 18 and a transistor 20 as a fourth transistor whose base and emitter are respectively connected to the collector and base of this transistor 18; The light-receiving part 15b of the first photocoupler is connected in parallel between the collector and emitter of the transistor 20, and the light-emitting part 24a of the fifth photocoupler is connected between the collector of the transistor 20 and the resistor 12. A circuit consisting of a series circuit with the light emitting section 26a of the optical coupling element No. 4 is connected. Triack 35,3
6, 37, and 38 are generally so-called zero cross circuits whose control circuits are conductive near zero voltage, and whose input circuits smooth the AC input using capacitor inputs, and transistors 17, 19, 18,
20 makes it a constant current circuit.
今、動作原理を正転回路３９により説明する。
スイツチ２がオンすることにより交流信号１はダ
イオードスタツク５により全波整流され、コンデ
ンサ７により平滑される。コンデンサ７の電圧が
抵抗１３，２１、トランジスタ１７，１９で構成
される定電流回路に印加され、光結合素子発光部
２３ａ，２５ａが導通し、同受光部２３ｂ，２５
ｂの最小トリガ電流以上となると、ゼロクロス回
路３１によりゼロ電圧近傍でトライアツク３５，
３６の制御電極に電流を流し、Ｒ相がＵ端子に、
Ｓ相がＶ端子に導通状態となり、正回転となる。
次にスイツチ２をオフし、スイツチ３をオンした
時は、同様の回路動作にてＲ相がＶ端子に、Ｓ相
がＵ端子に導通状態となり、負荷である三相モー
タは逆回転を行なう。 The operating principle will now be explained using the normal rotation circuit 39.
When the switch 2 is turned on, the AC signal 1 is full-wave rectified by the diode stack 5 and smoothed by the capacitor 7. The voltage of the capacitor 7 is applied to a constant current circuit composed of resistors 13, 21 and transistors 17, 19, and the photocoupler light emitting parts 23a, 25a become conductive, and the light receiving parts 23b, 25
When the minimum trigger current of
36 control electrodes, the R phase is connected to the U terminal,
The S phase becomes electrically connected to the V terminal, resulting in forward rotation.
Next, when switch 2 is turned off and switch 3 is turned on, the R phase becomes conductive to the V terminal and the S phase to the U terminal due to the same circuit operation, and the three-phase motor that is the load rotates in the reverse direction. .
次にクロスカレント防止回路の動作原理を説明
する。スイツチ２がオンし、このコンデンサ７の
電位が確立すると光結合素子の発光部１５ａが導
通する。次にスイツチ２がオンのまま、スイツチ
３がオンし、コンデンサ８の電位が確立すると、
光結合素子受光部１５ｂは導通状態となるが、こ
の飽和電圧Von１５ｂは、トランジスタ１８，２
０のそれぞれベース−エミツタ間電圧Vbe１８、
Vbe２０の和Vbeよりも小さいため、光結合素子
の発光部２４ａ，２６ａの電流は最小トリガ電流
以下の低い値におさえられてしまい、光結合素子
の受光部２４ｂ，２６ｂは非導通となり、したが
つてトライアツク３７，３８も非導通となる。同
様に光結合素子受光部１６ｂも導通状態となるた
め、トライアツク３５，３６は非導通となり、ク
ロスカレントは防止される。 Next, the principle of operation of the cross-current prevention circuit will be explained. When the switch 2 is turned on and the potential of the capacitor 7 is established, the light emitting part 15a of the photocoupler becomes conductive. Next, switch 3 is turned on while switch 2 remains on, and when the potential of capacitor 8 is established,
The photocoupler light receiving section 15b is in a conductive state, but this saturation voltage Von15b is
0 base-emitter voltage Vbe18,
Since the sum of Vbe20 is smaller than Vbe, the current in the light emitting parts 24a and 26a of the photocoupler is suppressed to a low value below the minimum trigger current, and the light receiving parts 24b and 26b of the photocoupler become non-conductive. Then the triaxes 37 and 38 also become non-conductive. Similarly, since the optical coupling element light receiving section 16b is also brought into conduction, the triacs 35 and 36 are brought out of conduction, and cross current is prevented.
又、本実施例ではスイツチング素子としてトラ
イアツクを用いているため制御信号が除かれても
最大半サイクルは導通状態である可能性があり、
又、入力平滑コンデンサの放電時定数により、ス
イツチ２又は３がオフになつてもトライアツクは
一定時間後にしか非導通とならない。これらの問
題点は以下により解決される。 Furthermore, since this embodiment uses a triac as a switching element, there is a possibility that it will remain conductive for at most half a cycle even if the control signal is removed.
Furthermore, due to the discharge time constant of the input smoothing capacitor, even if switch 2 or 3 is turned off, the triac becomes non-conductive only after a certain period of time. These problems are solved as follows.
正転回路３９において、Ａ点はＢ点よりも抵抗
１１の電圧降下分だけ電圧が高くなるため、抵抗
１１の値を適正に選定することによりコンデンサ
７の電圧が低下し、光結合素子発光部２３ａ，２
５ａの電流が最小トリガ電流以下になつても、光
結合素子発光部１５ａと電流を一定時間流すこと
ができ、したがつて同受光部１５ｂも導通状態に
おくことが可能となる。 In the normal rotation circuit 39, the voltage at point A is higher than at point B by the voltage drop across the resistor 11, so by appropriately selecting the value of the resistor 11, the voltage at the capacitor 7 decreases, and the light emitting section of the optical coupling element 23a,2
Even if the current of the photocoupler 5a becomes below the minimum trigger current, the current can be passed through the light-emitting section 15a of the optical coupling element for a certain period of time, and therefore the light-receiving section 15b can also be kept in a conductive state.
本実施例によれば、複数のスイツチング回路の
制御信号が同時にオンした場合はもちろん、スイ
ツチング素子の非導通遅れ、入力信号の時定数遅
れをも補償してクロスカレントを防止することが
できる。 According to this embodiment, it is possible to prevent cross current by compensating not only when the control signals of a plurality of switching circuits are turned on simultaneously, but also the non-conduction delay of the switching elements and the time constant delay of the input signal.
本発明によれば、トライアツクが非導通となつ
てから正転、逆転の切り換えを行うのでスイツチ
ング素子の非導通遅れや入力信号の時定数遅れが
あつても確実にクロスカレント防止が行えるスイ
ツチング装置を得ることができる。
According to the present invention, a switching device is provided that can reliably prevent cross current even if there is a delay in non-conduction of the switching element or a time constant delay in the input signal, since switching between forward and reverse rotation is performed after the triax becomes non-conductive. Obtainable.
第１図は従来技術の例を示す回路図、第２図は
本発明の一実施例を示す回路図である。
１：単相交流電源、２：第１のスイツチ、３：
第２のスイツチ、５：第１の全波整流回路、６：
第２の全波整流回路、７：第１のコンデンサ、
９：第１の抵抗器、１０：第５の抵抗器、１１：
第２の抵抗器、１２：第６の抵抗器、１３：第４
の抵抗器、１４：第８の抵抗器、１５ａ：第１の
光結合素子の発光部、１５ｂ：第１の光結合素子
の受光部、１６ａ：第２の光結合素子の発光部、
１６ｂ：第２の光結合素子の受光部、１７：第１
のトランジスタ、１８：第３のトランジスタ、１
９：第２のトランジスタ、２０：第４のトランジ
スタ、２１：第３の抵抗器、２２：第７の抵抗
器、２３ａ：第３の光結合素子の発光部、２３
ｂ：第３の光結合素子の受光部、２４ａ：第５の
光結合素子の発光部、２４ｂ：第５の光結合素子
の受光部、２５ａ：第４の光結合素子の発光部、
２５ｂ：第４の光結合素子の受光部、２６ａ：第
６の光結合素子の発光部、２６ｂ：第６の光結合
素子の受光部、３１：第１のゼロクロス回路、３
２：第２のゼロクロス回路、３３：第３のゼロク
ロス回路、３４：第４のゼロクロス回路、３５：
第１のトライアツク、３６：第２のトライアツ
ク、３７：第３のトライアツク、３８：第４のト
ライアツク、３９：正転回路、４０：逆転回路。
FIG. 1 is a circuit diagram showing an example of the prior art, and FIG. 2 is a circuit diagram showing an embodiment of the present invention. 1: Single-phase AC power supply, 2: First switch, 3:
Second switch, 5: First full-wave rectifier circuit, 6:
second full-wave rectifier circuit, 7: first capacitor,
9: first resistor, 10: fifth resistor, 11:
2nd resistor, 12: 6th resistor, 13: 4th resistor
resistor, 14: eighth resistor, 15a: light emitting part of the first optical coupling element, 15b: light receiving part of the first optical coupling element, 16a: light emitting part of the second optical coupling element,
16b: Light receiving part of second optical coupling element, 17: First
transistor, 18: third transistor, 1
9: second transistor, 20: fourth transistor, 21: third resistor, 22: seventh resistor, 23a: light emitting part of third photocoupler, 23
b: light receiving part of the third optical coupling element, 24a: light emitting part of the fifth optical coupling element, 24b: light receiving part of the fifth optical coupling element, 25a: light emitting part of the fourth optical coupling element,
25b: Light receiving part of the fourth optical coupling element, 26a: Light emitting part of the sixth optical coupling element, 26b: Light receiving part of the sixth optical coupling element, 31: First zero cross circuit, 3
2: second zero cross circuit, 33: third zero cross circuit, 34: fourth zero cross circuit, 35:
1st triax, 36: 2nd triax, 37: 3rd triax, 38: 4th triax, 39: forward rotation circuit, 40: reverse rotation circuit.
Claims (1)
２と、この第１のスイツチ２に接続された第１の
全波整流回路５と、この第１の全波整流回路５の
出力を平滑する第１のコンデンサ７と、この第１
のコンデンサ７と並列に接続された第１の光結合
素子の発光部１５ａと第１の抵抗器９との直列回
路と、上記第１のコンデンサ７の正極側に一端が
接続されてその両端に電位差を発生させる第２の
抵抗器１１と、エミツタが上記第１のコンデンサ
７の負極に接続されてそのベース・エミツタ間に
第３の抵抗器２１が接続されるとともにそのコレ
クタが第４の抵抗器１３を介して上記第２の抵抗
器１１の他端に接続された第１のトランジスタ１
７およびこの第１のトランジスタ１７のコレクタ
およびベースにそれぞれベースとエミツタが接続
された第２のトランジスタ１９からなる第１の定
電流回路と、この第１のトランジスタ１７のコレ
クタ・エミツタ間に並列に接続された第２の光結
合素子の受光部１６ｂと、上記第２のトランジス
タ１９のコレクタと上記第２の抵抗器１１との間
に接続された第３の光結合素子の発光部２３ａと
第４の光結合素子の発光部２５ａとの直列回路
と、第３の光結合素子の受光部２３ｂに接続され
た第１のゼロクロス回路３１と、この第１のゼロ
クロス回路３１に制御電極が接続された第１のト
ライアツク３５と、第４の光結合素子の受光部２
５ｂに接続された第２のゼロクロス回路３２と、
この第２のゼロクロス回路３２に制御電極が接続
された第２のトライアツク３６を備えた正転回路
３９と、 単相交流電源１に接続された第２のスイツチ３
と、この第２のスイツチ３に接続された第２の全
波整流回路６と、この第２の全波整流回路６の出
力を平滑する第２のコンデンサ８と、この第２の
コンデンサ８と並列に接続された第２の光結合素
子の発光部１６ａと第５の抵抗器１０との直列回
路と、上記第２のコンデンサ８の正極側に一端が
接続されてその両側に電位差を発生させる第６の
抵抗器１２と、エミツタが上記第２のコンデンサ
８の負極に接続されてそのベース・エミツタ間に
第７の抵抗器２２が接続されるとともにそのコレ
クタが第８の抵抗器１４を介して上記第６の抵抗
器１２の他端に接続された第３のトランジスタ１
８およびこの第３のトランジスタ１８のコレクタ
およびベースにそれぞれベースとエミツタが接続
された第４のトランジスタ２０からなる第２の定
電流回路と、この第３のトランジスタ１８のコレ
クタ・エミツタ間に並列に接続された第１の光結
合素子の受光部１５ｂと、上記第４のトランジス
タ２０のコレクタと上記第６の抵抗器１２との間
に接続された第５の光結合素子の発光部２４ａと
第６の光結合素子の発光部２６ａとの直列回路
と、第５の光結合素子の受光部２４ｂに接続され
た第３のゼロクロス回路３３と、この第３のゼロ
クロス回路３３に制御電極が接続された第３のト
ライアツク３７と、第６の光結合素子の受光部２
６ｂに接続された第４のゼロクロス回路３４と、
この第４のゼロクロス回路３４に制御電極が接続
された第４のトライアツク３８を備えた逆転回路
４０を備え、 上記第２の抵抗器１１はその値が上記第１のコ
ンデンサ７の電圧が低下し上記第３の光結合素子
の発光部２３ａおよび上記第４の光結合素子の発
光部２５ａの電流が上記第１のトライアツク３５
および第２のトライアツク３６の最小トリガ電流
以下になつても上記第１の光結合素子の発光部１
５ａの電流を一定時間流せる値に設定され、 上
記第６の抵抗器１２はその値が上記第２のコンデ
ンサ８の電圧が低下し上記第５の光結合素子の発
光部２４ａおよび上記第６の光結合素子の発光部
２６ａの電流が上記第３のトライアツク３７およ
び第４のトライアツク３８の最小トリガ電流以下
になつても上記第２の光結合素子の発光部１６ａ
の電流を一定時間流せる値に設定されたことを特
徴とするスイツチング装置。[Claims] 1. A first switch 2 connected to a single-phase AC power source 1, a first full-wave rectifier circuit 5 connected to the first switch 2, and a first full-wave rectifier circuit 5 connected to the first switch 2. a first capacitor 7 for smoothing the output of the circuit 5;
A series circuit of the light emitting part 15a of the first optical coupling element and the first resistor 9 is connected in parallel with the capacitor 7, and one end is connected to the positive electrode side of the first capacitor 7 and both ends thereof are connected. A second resistor 11 that generates a potential difference, and a third resistor 21 whose emitter is connected to the negative electrode of the first capacitor 7 and whose base and emitter are connected, and whose collector is connected to a fourth resistor. a first transistor 1 connected to the other end of the second resistor 11 via a resistor 13;
7 and a second transistor 19 whose base and emitter are connected to the collector and base of this first transistor 17, respectively, and a first constant current circuit that is connected in parallel between the collector and emitter of this first transistor 17. The light-receiving part 16b of the second photocoupler is connected, and the light-emitting part 23a of the third photocoupler is connected between the collector of the second transistor 19 and the second resistor 11. A series circuit with the light emitting part 25a of the fourth photocoupler, a first zero cross circuit 31 connected to the light receiving part 23b of the third photocoupler, and a control electrode connected to the first zero cross circuit 31. the first triax 35 and the light receiving section 2 of the fourth optical coupling element.
5b, a second zero cross circuit 32 connected to
A normal rotation circuit 39 including a second triax 36 with a control electrode connected to this second zero-cross circuit 32, and a second switch 3 connected to the single-phase AC power supply 1.
A second full-wave rectifier circuit 6 connected to the second switch 3, a second capacitor 8 for smoothing the output of the second full-wave rectifier circuit 6, and a second capacitor 8 connected to the second switch 3. A series circuit of the light emitting part 16a of the second optical coupling element and the fifth resistor 10 connected in parallel, and one end of which is connected to the positive electrode side of the second capacitor 8 to generate a potential difference between the two sides. A sixth resistor 12 has an emitter connected to the negative electrode of the second capacitor 8, and a seventh resistor 22 is connected between its base and emitter, and its collector is connected through an eighth resistor 14. a third transistor 1 connected to the other end of the sixth resistor 12;
8 and a fourth transistor 20 whose base and emitter are connected to the collector and base of this third transistor 18, respectively, and a second constant current circuit that is connected in parallel between the collector and emitter of this third transistor 18. The light-receiving part 15b of the first photocoupler is connected, and the light-emitting part 24a of the fifth photocoupler is connected between the collector of the fourth transistor 20 and the sixth resistor 12. A series circuit with the light emitting part 26a of the No. 6 photocoupler, a third zero cross circuit 33 connected to the light receiving part 24b of the fifth photocoupler, and a control electrode connected to the third zero cross circuit 33. the third triax 37 and the light receiving section 2 of the sixth optical coupling element.
6b, a fourth zero cross circuit 34 connected to
A reversing circuit 40 is provided with a fourth triax 38 having a control electrode connected to the fourth zero-crossing circuit 34, and the second resistor 11 has a value that decreases when the voltage of the first capacitor 7 decreases. The currents in the light emitting portion 23a of the third photocoupler and the light emitting portion 25a of the fourth photocoupler are connected to the first triac 35.
Even if the current becomes less than the minimum trigger current of the second triac 36, the light emitting section 1 of the first optical coupling element
The value of the sixth resistor 12 is set to a value that allows the current of the fifth photocoupler 24a to flow for a certain period of time, and the value of the sixth resistor 12 increases when the voltage of the second capacitor 8 decreases and the light emitting portion 24a of the fifth optical coupling element and the sixth resistor 12 Even if the current in the light-emitting part 26a of the photocoupler becomes equal to or less than the minimum trigger current of the third triax 37 and the fourth triax 38, the light-emission part 16a of the second photocoupler
A switching device characterized in that the current is set to a value that allows the current to flow for a certain period of time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18452482A JPS5974725A (en) | 1982-10-22 | 1982-10-22 | Switching device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18452482A JPS5974725A (en) | 1982-10-22 | 1982-10-22 | Switching device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5974725A JPS5974725A (en) | 1984-04-27 |
| JPH0582776B2 true JPH0582776B2 (en) | 1993-11-22 |
Family
ID=16154704
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18452482A Granted JPS5974725A (en) | 1982-10-22 | 1982-10-22 | Switching device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5974725A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09249165A (en) * | 1996-03-14 | 1997-09-22 | Mitsukazu Kaizaki | Paved road surface damage preventing unit for crawler |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2509416Y2 (en) * | 1991-10-30 | 1996-09-04 | 凸版印刷株式会社 | Oven microwave door panel structure |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50141959A (en) * | 1974-05-02 | 1975-11-15 | ||
| JPS5573137A (en) * | 1978-11-25 | 1980-06-02 | Omron Tateisi Electronics Co | Solid state relay |
| JPS58188932A (en) * | 1982-04-28 | 1983-11-04 | Toshiba Corp | Priority controlling circuit of solid-state relay |
-
1982
- 1982-10-22 JP JP18452482A patent/JPS5974725A/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50141959A (en) * | 1974-05-02 | 1975-11-15 | ||
| JPS5573137A (en) * | 1978-11-25 | 1980-06-02 | Omron Tateisi Electronics Co | Solid state relay |
| JPS58188932A (en) * | 1982-04-28 | 1983-11-04 | Toshiba Corp | Priority controlling circuit of solid-state relay |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09249165A (en) * | 1996-03-14 | 1997-09-22 | Mitsukazu Kaizaki | Paved road surface damage preventing unit for crawler |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5974725A (en) | 1984-04-27 |
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