KR840002083Y1 - Emergency circuit - Google Patents
Emergency circuit Download PDFInfo
- Publication number
- KR840002083Y1 KR840002083Y1 KR2019830000341U KR830000341U KR840002083Y1 KR 840002083 Y1 KR840002083 Y1 KR 840002083Y1 KR 2019830000341 U KR2019830000341 U KR 2019830000341U KR 830000341 U KR830000341 U KR 830000341U KR 840002083 Y1 KR840002083 Y1 KR 840002083Y1
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- South Korea
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- output
- circuit
- current
- pin
- differential amplifier
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
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- Emergency Protection Circuit Devices (AREA)
Abstract
내용 없음.No content.
Description
제1도 (a) 내지 (c)는 종래의 전류 제한장치의 동작 설명도.1 (a) to (c) are explanatory diagrams of the operation of the conventional current limiting device.
제2도는 본 고안의 회로도.2 is a circuit diagram of the present invention.
본 고안은 전류 제한회로에 연동되어 전류 제한회로를 순간적으로 정지시키는 전류 제한장치의 순간 정지회로에 관한 것이다.The present invention relates to an instantaneous stop circuit of a current limiting device which intermittently stops the current limiting circuit in association with a current limiting circuit.
종래의 제한 전류 제한장치는 출력 전류가 정격치를 초과하면 전기기기의 출력을 감소시키도록 되어 있는데, 제1도(a) 내지 (c)에 나타난 바와 같이 동작한다. 즉 제1도(a)와 같이 출력 전압이 서서히 감소되거나 또는 제1도(b)와 같이 급격히 감소되는 경우 및 제1도(c)와 같이 출력전압과 전류가 동시에 감소되는 3가지 경우가 있다.The conventional limiting current limiting device is designed to reduce the output of the electric machine when the output current exceeds the rated value, and operates as shown in Figs. 1 (a) to (c). That is, there are three cases in which the output voltage is gradually reduced as shown in FIG. 1 (a) or is rapidly reduced as in FIG. 1 (b), and the output voltage and current are simultaneously decreased as in FIG. .
그러나, 이들 3가지 경우는 모두 출력 전압은 거의 제로(0) 볼트까지 감소되지만 전류는 계속 흐르고 있으므로 이 상태에 있어서는 전기기기는 계속 동작하게 되고 따라서 전기기기 내에서 많은 열이 발생되며 또한 출력 전류가 계속 흐르고 있으므로 갑작스러운 단락과 같은 사고가 발생하였을 때는 전기기기의 보호가 완벽하지 못하게 된다.In all three cases, however, the output voltage is reduced to almost zero volts, but the current continues to flow, so in this state the electrical equipment continues to operate, thus generating a lot of heat in the electrical equipment and the output current As it continues to flow, the protection of electrical equipment is incomplete in the event of an accident such as a sudden short circuit.
본 고안은 이러한 종래의 결점을 개선하기 위하여 안출한 것으로써, 어느 정도까지의 출력 전류는 정상적으로 전류 제한동작을 하여 출력 전압을 감소시키다가 출력측 단락과 같은 사고에서는 순간적으로 전기기기를 정지시킨 후 일정 시간이 경과하면 재 기동하게 되나, 출력측 단락의 사고가 계속하게 되면 전기기기를 완전히 정지시켜 전기기기를 완전히 보호하는데 그 목적이 있다.The present invention has been devised to improve the above-mentioned drawbacks. To some extent, the output current is normally limited by the current limiting operation to reduce the output voltage. After the time elapses, it restarts, but if the output short circuit accident continues, the purpose is to completely stop the electrical equipment and to protect the electrical equipment.
본 고안을 제2도에 의하여 설명한다.The invention is illustrated by FIG.
도면중, (1)은 종래의 전류 제한 회로인데, 이 회로(1)에 있어서 CT는 출력 전류에 비례하는 전류를 검출하는 전류 변성기로써, 이 전류 변성기 CT의 이차측에는 정류기(D1~D4)가 연결되어 있고, 정류기(D1~D4)의 양단에 분압기(R1)과 (R2)가 연결되어 있다.In the figure, reference numeral 1 denotes a conventional current limiting circuit. In this circuit 1, CT is a current transformer for detecting a current proportional to an output current, and rectifiers D 1 to D 4 are provided on the secondary side of the current transformer CT. ) Is connected, and voltage dividers (R 1 ) and (R 2 ) are connected at both ends of rectifiers (D 1 to D 4 ).
IC-1는 차동 증폭기로써, 분압기(R1)과 (R2)에 의하여 분압된 전압은 다이오드 (D5)와 (D6)를 통하여 차동 증폭기(IC-1)의 반전핀(4)와 본 고안의 차동 증폭기(IC-2)의 반전핀(10)에 인가된다.IC-1 is a differential amplifier, and the voltage divided by voltage divider (R 1 ) and (R 2 ) is connected to inverting pin (4) of differential amplifier (IC-1) through diodes (D 5 ) and (D 6 ). It is applied to the inverting pin 10 of the differential amplifier (IC-2) of the present invention.
(2)는 종래 전류 제한회로(1)에 연결된 순간 정지회로로써, 이 순간 정지회로 (2)에 있어서의 IC-2는 차동 증폭기로써, 이 차동 증폭기(IC-2)의 반전핀(10)에는 병열로 연결된 통상의 콘덴서(C)와 저항(R3)의 일단을 연결하고 그 타단은 차동 증폭기(IC-2)의 전원선에 연결하였다. (3)은 정지 신호를 쇼트 다운 회로(도시 생략)에 보내는 카운터 회로이다.(2) is a momentary stop circuit connected to the conventional current limiting circuit (1), wherein the IC-2 in the momentary stop circuit (2) is a differential amplifier, and the inverting pin (10) of the differential amplifier (IC-2). The common capacitor (C) and one end of the resistor (R 3 ) connected in parallel are connected to each other, and the other end thereof is connected to the power line of the differential amplifier (IC-2). (3) is a counter circuit for sending a stop signal to a short down circuit (not shown).
전류 변성기(CT)에 의하여 출력 전류에 비례하는 전류를 검출하게 되면 전류 변성기(CT)의 이차측 전류는 정류기(D1~D4)에 의해 정류된다.When a current proportional to the output current is detected by the current transformer CT, the secondary current of the current transformer CT is rectified by the rectifiers D 1 to D 4 .
이와같이 정류된 전류 변성기(CT)의 이차측 전류는 분압기(R1)과 (R2)에 의하여 분압되고 이 분압된 전압은 다이오드(D5)와 (D6)을 통하여 차동 증폭기(IC-1)의 반전핀(4)와 차동 증폭기(IC-2)의 반전핀(10)에 인가되고 이때 차동 증폭기(IC-1)의 비반전핀(5)에는 전류 제한 설정치에 해당하는 전압이 인가되어 있다.The secondary current of the rectified current transformer CT is divided by the voltage divider R 1 and R 2 , and the divided voltage is divided by the diode D 5 and D 6 through the differential amplifier IC-1. Is applied to the inverting pin (4) of the differential amplifier (IC-2) and the inverting pin (10) of the differential amplifier (IC-2) at this time, the voltage corresponding to the current limit setting value is applied to the non-inverting pin (5) of the differential amplifier (IC-1) have.
전류 제한이 되지 않는 평상시는 차동 증폭기(IC-1)의 출력핀(6)에 "H"로서 출력이 나타나다가 과전류 상태가 되면 이핀(4)의 전위가 핀(5)의 전위보다 높은 상태가 되면 출력핀(6)의 출력은 반전되어 "L"로 나타난다.When the current is not limited, when the output appears as "H" at the output pin 6 of the differential amplifier IC-1 and becomes an overcurrent state, the potential of the pin 4 is higher than the potential of the pin 5. When the output of the output pin 6 is inverted and appears as "L".
이때 이 출력이 전기기기 내의 전압 제어회로에 보내져 출력 전압을 감소하게 되며, 이와같은 경우 다이오드(D6)을 통하여 증폭기(IC-2)의 반전핀(10)에 비반전핀 (11)보다 높은 수준의 "H"가 인가되면 증폭기(IC-2)의 출력판(13)은 "L"로 반전되고 (일정시간 콘덴서 C와 저항 R3의 시정수로 결정되는 시간)이 시간이 경과되면 핀(10)은 다시 "L"로 회복된다.At this time, the output is sent to the voltage control circuit in the electrical equipment to reduce the output voltage, in this case, higher than the non-inverting pin 11 to the inverting pin 10 of the amplifier (IC-2) through the diode (D 6 ). When the level "H" is applied, the output plate 13 of the amplifier (IC-2) is inverted to "L" and the pin (time determined by the time constant of the capacitor C and the resistor R 3 for a certain time) passes over time. 10 is restored to "L" again.
그런데 출력단락 상태가 계속되면 핀(10)의 전위는 다시 "H"로 되고 출력핀 (13)은 다시 "L"로 된다.However, if the output short-circuit condition continues, the potential of the pin 10 becomes "H" again, and the output pin 13 becomes "L" again.
이와같이 전기기기의 출력 단락 검출로 인하여 전기기기가 순간 정지된 후 통상의 콘덴서(C)와 저항(R3)의 시정수에 의한 일정 시간이 경과되어 재 기동되었을때 출력단락이 해소되지 않으면 카운터회로(3)에 의하여 정지 신호가 쇼트 다운회로(도시 생략)에 보내져 전기기기를 완전히 정지시키는 효과가 있다.In this way, if the output short circuit is not solved when a certain time due to the time constant of the capacitor (C) and the resistor (R 3 ) has elapsed after the electric equipment is momentarily stopped due to the output short circuit detection of the electrical equipment, the counter circuit By (3), a stop signal is sent to a short down circuit (not shown), which has the effect of completely stopping the electric equipment.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019830000341U KR840002083Y1 (en) | 1983-01-17 | 1983-01-17 | Emergency circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019830000341U KR840002083Y1 (en) | 1983-01-17 | 1983-01-17 | Emergency circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR840004497U KR840004497U (en) | 1984-09-20 |
| KR840002083Y1 true KR840002083Y1 (en) | 1984-10-10 |
Family
ID=19228125
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR2019830000341U KR840002083Y1 (en) | 1983-01-17 | 1983-01-17 | Emergency circuit |
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| Country | Link |
|---|---|
| KR (1) | KR840002083Y1 (en) |
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1983
- 1983-01-17 KR KR2019830000341U patent/KR840002083Y1/en not_active IP Right Cessation
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| Publication number | Publication date |
|---|---|
| KR840004497U (en) | 1984-09-20 |
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