KR950009879Y1 - Scr driving circuit using light combinated element - Google Patents
Scr driving circuit using light combinated element Download PDFInfo
- Publication number
- KR950009879Y1 KR950009879Y1 KR2019900007906U KR900007906U KR950009879Y1 KR 950009879 Y1 KR950009879 Y1 KR 950009879Y1 KR 2019900007906 U KR2019900007906 U KR 2019900007906U KR 900007906 U KR900007906 U KR 900007906U KR 950009879 Y1 KR950009879 Y1 KR 950009879Y1
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- South Korea
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- scr
- voltage
- driving circuit
- optical coupling
- thyristor
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- 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
- H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
- H03K17/60—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being bipolar transistors
- H03K17/601—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being bipolar transistors using transformer coupling
-
- 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Electronic Switches (AREA)
Abstract
내용 없음.No content.
Description
제1도는 종래의 SCR 구동회로를 나타낸 상세회로도1 is a detailed circuit diagram showing a conventional SCR driving circuit
제2도는 이 고안에 따른 SCR 구동회로를 나타낸 상세회로도이다2 is a detailed circuit diagram showing an SCR driving circuit according to the present invention.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
10 : 전원공급부 20 : 광결합소자부10: power supply unit 20: optical coupling element
30 : 부하제어부 40 : 부하구동부30: load control unit 40: load driving unit
R, S : 단상교류입력단자 D1, D2, D3 : 다이오드R, S: Single phase AC input terminal D1, D2, D3: Diode
Q2, Q3 : 트랜지스터 R2, R3, R4 : 저항Q2, Q3: transistors R2, R3, R4: resistors
LED : 발광다이오드LED: Light Emitting Diode
이 고안은 모터에 적용되는 구동회로에 관한것으로서, 더욱 상세하게는 사이리스터(SCR)의 제어 게이트단자에 트리거 신호 입력용 광결합소자와 소자구동용 전원공급부를 각각 접속함으로써 사이리스터(SCR) 구동회로를 간략화한 광결합 소자를 이용한 SCR 구동회로에 관한 것이다.The present invention relates to a driving circuit applied to a motor. More specifically, the thyristor (SCR) driving circuit is connected to the control gate terminal of the thyristor (SCR) by connecting an optical coupling element for trigger signal input and a power supply for driving a device. SCR driving circuit using a simplified optical coupling element.
제1도는 종래의 SCR 구동회로를 나타낸 상세회로도로서 상기 SCR 구동회로는 정류다이오드(50)를 이용하여 교류전압을 전파정류하고, 이 전파정류된 전압은 저항(R1)의 양단에 걸리는 전압으로 트랜지스터(Q1)를 구동하여 상기 트랜지스터(Q1)축에 연결된 펄스트랜스(PT)에 의해 SCR의 게이트에 트리거 신호를 제공하는 것이다.FIG. 1 is a detailed circuit diagram showing a conventional SCR driving circuit, in which the SCR driving circuit is full-wave rectified AC voltage using the rectifying diode 50, and the full-wave rectified voltage is a voltage applied to both ends of the resistor R1. It drives Q1 to provide a trigger signal to the gate of the SCR by a pulse transformer PT connected to the transistor Q1 axis.
그러나, 이와같은 종래의 SCR 구동회로는 부피와 중량이 큰 트랜스를 이용하기 때문에 설치공간이 크고 소형경량화하는 추세에 역행하게 되며 신뢰성이 감소되는 문제점이 있었다.However, such a conventional SCR driving circuit uses a transformer having a large volume and a weight, thus reversing the trend of increasing the installation space and size and weight, and thus reducing reliability.
이 고안은 이와같은 문제점을 해결하기 위한 것으로서, 이 고안의 목적은 종래와 같이 펄스 트랜스를 이용하지 않고 광결합(Photo-Coupler)소자를 이용하여 SCR을 구동시킴으로써 소형경량화 및 신뢰성을 향상시키는 광결합 소자를 이용한 SCR 구동회로를 제공하는데 있다.This invention is to solve this problem, and the purpose of this invention is to combine the optical coupling to improve the compact weight and reliability by driving the SCR using a photo-coupler element without using a pulse transformer as conventionally An SCR driving circuit using an element is provided.
이러한 목적을 달성하기 위한 이 고안의 광결합 소자를 이용한 SCR 구동회로는 입력된 교류전압을 정류용다이오드를 이용하여 전파정류하고, 이 정파정류된 전압으로 트랜지스터를 구동함과 동시에 상기 트랜지스터의 출력단에 접속된 펄스 트랜스를 구동함으로써 사이리스터에 트리거신호를 제공하는 모터 구동용 제어 회로에 있어서; 상기 입력전압은 부하제어부의 사이리스터의 입력단에 직접 제공되고, 부하구동부로의 상기 입력전압 공급여부가 상기 사이리스터의 게이트에 접속된 전원공급부의 소자 구동전압과 광결합소자의 트리거 신호에 따라 결정되는 점에 그 특징이 있다.The SCR driving circuit using the optical coupling element of the present invention for achieving the above object is full-wave rectified input AC voltage by using a rectifying diode, and at the same time to drive the transistor with the rectified wave rectified voltage to the output terminal of the transistor A motor drive control circuit for providing a trigger signal to a thyristor by driving a connected pulse transformer; The input voltage is provided directly to the input terminal of the thyristor of the load control unit, and whether the input voltage supply to the load driver is determined according to the device driving voltage of the power supply unit connected to the gate of the thyristor and the trigger signal of the optical coupling element. Has its features.
이하, 이 고안에 따른 광결합 소자를 이용한 SCR 구동회로의 일실시예를 첨부한 도면을 상세히 설명한다.Hereinafter, an embodiment of an SCR driving circuit using an optical coupling element according to the present invention will be described in detail.
제2도는 이 고안에 따른 광결합 소자를 이용한 SCR 구동회로를 나타낸 상세회로도로서, 먼저, 소자 구동용전원공급부(20)는 트랜스에 정류용 다이오드(D1)가 연결되고 상기 정류용 다이오드(D1)에 평활용 콘덴서(C1)가 연결되어 후단에 전압을 공급하도록 구성된다.2 is a detailed circuit diagram illustrating an SCR driving circuit using an optical coupling device according to the present invention. First, the device driving power supply unit 20 has a rectifying diode D1 connected to a transformer and the rectifying diode D1 is connected. Smoothing capacitor (C1) is connected to the configured to supply a voltage to the rear end.
또한, 외부로부터 인가되는 펄스신호에 따라 스위칭되는 스위칭트랜지스터(Q2)에 발광다이오드(LED)가 연결되고, 상기 전원공급부(10)의 구등전압 및 발광다이오드(LED)의 발광신호에 따라 턴-온되는 포토트랜지스터(Q3)가 연결되어 광결합소자부(20)가 이루어진다.In addition, the light emitting diode LED is connected to the switching transistor Q2 switched according to a pulse signal applied from the outside, and is turned on according to the bulb voltage of the power supply unit 10 and the light emitting signal of the light emitting diode LED. The phototransistor Q3 is connected to form an optical coupling element unit 20.
또한, 트리거신호에 따라 턴-온되어 부하에 일정전압을 공급하도록 SCR에 정류용 다이오드(D2, D3)가 연결된 부하제어부(30)가 상기 광결합 소자부(20)의 포토트랜지스터(Q3)와 전원공급부(10)에 각각 연결되어 있다.In addition, the load control unit 30 connected to the rectifier diodes (D2, D3) to the SCR is turned on according to the trigger signal to supply a constant voltage to the load and the phototransistor (Q3) of the optical coupling element unit 20 It is connected to the power supply 10, respectively.
또한, 상기 부하제어부(30)에 평활용 콘덴서(C3)와 부하(RL)로 구성된 부하구동부(40)가 연결되어 있다.In addition, a load driver 40 including a smoothing capacitor C3 and a load RL is connected to the load control unit 30.
이와같이 구성된 이 고안에 있어서 전원공급부(20)의 교류전압을 유기하는 트랜스에 의해 교류전압이 유기되면 이 전압은 정류용 다이오드(D1)에 의해 정류되고 평활용 콘덴서(C1)에 의해 평활되어 발광신호에 따라턴-온되는 포토트랜지스터(Q3)에 일정전압을 공급하게 된다.In this design, when the AC voltage is induced by a transformer that induces the AC voltage of the power supply unit 20, the voltage is rectified by the rectifying diode D1 and smoothed by the smoothing capacitor C1 to emit light. As a result, a constant voltage is supplied to the phototransistor Q3 which is turned on.
그리고 펄스신호에 따라 트랜지스터(Q2)가 턴-온되면 광결합소자부(20)의 발광다이오드(LED)가 발광되어포토트랜지스터(Q3)가 로직 "하이" 상태가 되고 이에 의해 트리거신호가 SCR의 게이트에 인가되면 SCR의 게이트 전위는 캐소드 전위보다 높아 SCR은 턴-온되고 SCRDL 텬-온되면 캐소드 전위는 트랜스에 의해 유기되는 입력전압(AC)의배인 DC전위가 발생되어 V2의 "-"측의 전압이 캐소드측보다 낮으므로 SCR의 캐소드를 통하는 전류는 부하동부(40)로 흘러 부하를 구동시키게 된다.When the transistor Q2 is turned on according to the pulse signal, the light emitting diode LED of the optical coupling element unit 20 emits light so that the phototransistor Q3 is in a logic "high" state, thereby triggering the trigger signal of the SCR. When applied to the gate, the gate potential of the SCR is higher than the cathode potential, so that the SCR is turned on and the SCRDL is turned on, the cathode potential of the input voltage (AC) is induced by the transformer. Since a double DC potential is generated so that the voltage on the "-" side of V2 is lower than the cathode side, the current through the cathode of the SCR flows to the load driving part 40 to drive the load.
따라서 V2의 "+"전위는 항상 일정하게 유지되어 트랜지스터(Q2)의 볘이스에 인가되는 펄스신호에 의해 SCR은 턴-온, 턴-오프되게 된다.Therefore, the "+" potential of V2 is always kept constant so that the SCR is turned on and off by the pulse signal applied to the phase of the transistor Q2.
SCR의 턴-온에 따라 일정전압이 부하에 공급되어 부하구동부(40)가 구동하게 된다.A constant voltage is supplied to the load according to the turn-on of the SCR to drive the load driver 40.
이상에서 살펴본 바와같이 이 고안은 광결합 소자를 제어하여 대전력용인 SCR을 구동할 수 있어 원가절감, 소형화, 신뢰성 향상등의 효과가 있다.As discussed above, the present invention can drive a high power SCR by controlling an optical coupling device, thereby reducing costs, miniaturization, and improving reliability.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019900007906U KR950009879Y1 (en) | 1990-05-31 | 1990-05-31 | Scr driving circuit using light combinated element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019900007906U KR950009879Y1 (en) | 1990-05-31 | 1990-05-31 | Scr driving circuit using light combinated element |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR910021153U KR910021153U (en) | 1991-12-20 |
| KR950009879Y1 true KR950009879Y1 (en) | 1995-11-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR2019900007906U KR950009879Y1 (en) | 1990-05-31 | 1990-05-31 | Scr driving circuit using light combinated element |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR950009879Y1 (en) |
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1990
- 1990-05-31 KR KR2019900007906U patent/KR950009879Y1/en not_active IP Right Cessation
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| Publication number | Publication date |
|---|---|
| KR910021153U (en) | 1991-12-20 |
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