KR900009631Y1 - Power circuit - Google Patents
Power circuit Download PDFInfo
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- KR900009631Y1 KR900009631Y1 KR2019870022708U KR870022708U KR900009631Y1 KR 900009631 Y1 KR900009631 Y1 KR 900009631Y1 KR 2019870022708 U KR2019870022708 U KR 2019870022708U KR 870022708 U KR870022708 U KR 870022708U KR 900009631 Y1 KR900009631 Y1 KR 900009631Y1
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- power supply
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
- H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
- H02H7/1213—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for DC-DC converters
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Eletrric Generators (AREA)
Abstract
내용 없음.No content.
Description
도면은 본 고안의 시스템 보호회로를 상세히 보인 도면이다.The figure shows the system protection circuit of the present invention in detail.
본 고안은 각종 전기응용 시스템의 전원공급단에 있어서, 전압 발생기 및 그 출력단의 단락상태를 감지하여 시스템으로의 동작전원 공급을 차단하는 단락시 시스템 보호회로에 관한 것이다.The present invention relates to a system protection circuit for short circuits that detects a short circuit condition of a voltage generator and its output terminal in power supply stages of various electric application systems and cuts off the operation power supply to the system.
종래에는 전원공급단에 퓨즈나 릴레이 또는 과부하 계전기를 설치하여 단락시 전원을 차단시킴으로써 시스템을 보호하였다.Conventionally, a fuse, a relay, or an overload relay is installed at the power supply to protect the system by cutting off the power in the event of a short circuit.
그러나 이러한 종래의 보호수단은 회로가 단락되더라도 전원공급단에 설치된 퓨즈나 릴레이, 또는 과부하 계전기가 개방되지 않거나, 동작하여 개방되더라도 시간이 오래 걸리는 경우가 생기게 된다.However, such a conventional protection means does not open a fuse, a relay, or an overload relay installed in the power supply stage even if the circuit is shorted, or may take a long time even if it is opened by operation.
그러므로 상기 전원공급단에 연결되어 부하로 동작하는 시스템에 치명적인 손상을 주어 구성소자가 파괴되거나, 오동작을 유발하게 되는 등의 문제점이 있었다.Therefore, there is a problem such as causing a fatal damage to the system operating as a load connected to the power supply terminal to destroy the component, causing a malfunction.
또 이러한 방식의 보호수단은 신뢰성을 높이기 위하여 고가의 부품을 사용하여야 했으며, 이에따라 제품을 고가로 되게 하는 문제점이 있었다.In addition, the protection means of this method had to use expensive parts to increase the reliability, there was a problem that makes the product expensive.
이에 본 고안은 상기와 같은 문제점을 해결하기 위하여, 단락시 동작전원이 규정 전압보다 높아지거나 낮아지는 것을 감지하고, 이상이 발생하면 즉시 레귤레이터에 전원차단을 위한 제어신호를 출력하여 시스템을 보호하도록 한 단락시 시스템보호회로를 제공하는 것을 그 목적으로 한다.In order to solve the above problems, the present invention detects that the operating power becomes higher or lower than the specified voltage during a short circuit, and if an abnormality occurs, immediately outputs a control signal for power supply to the regulator to protect the system. It is an object to provide a system protection circuit in the event of a short circuit.
이를 위하여 본 고안은 전압발생기 내부 회로의 단락으로 인해 동작전원시 규정전압보다 높아질 때를 감지하는 과전압 검출부와 전원 공급성과 접지선의 합선으로 동작전원이 규정 전압보다 낮아질 때를 감지하는 저전압 검출부와, 동작전원이 규정 전압이상이거나 이하일 경우 레귤레이터에 전원 제어신호를 출력하여 시스템으로의 전원공급을 차단하는 전원제어 신호 출력부등을 구비하게 된다.To this end, the present invention provides an overvoltage detector for detecting when the power supply is higher than the specified voltage due to a short circuit in the voltage generator, and a low voltage detector for detecting when the operating power is lower than the specified voltage due to a short circuit between the power supply and the ground line. When the power is above or below the specified voltage, the power control signal output part is outputted to output the power control signal to the regulator and cut off the power supply to the system.
특히, 이후 기술되는 실시예에서는 15V, 12V, 9V의 전압을 발생시키는 전원공급단을 일예로 들어 설명하였으나, 임의로 여러가지 레벨의 동작전원을 발생시키는 전원공급단에 적용하여 사용할 수도 있다.In particular, in the embodiments described below, power supply stages for generating voltages of 15V, 12V, and 9V have been described as an example, but may be applied to power supply stages for generating various levels of operating power.
이하, 본 고안의 실시에를 첨부된 도면에 참조하여 상세히 설명하면 다음과 같다.Hereinafter, with reference to the accompanying drawings, an embodiment of the present invention in detail as follows.
도면에 도시된 바와같이, 12V 전압 발생기(1)와 9V 전압발생기(2)를 구비하고 시스템 제어 마이콤(도시되지 않음)의 전원제어신호에 따라 여러가지 레벨의 동작전원을 부하가 되는 시스템(3)으로 공급하는 통상의 전원공급단에 있어서, 상기 12V 및 9V 전압발생기(1)(2)의 단락으로 인해 동작전원들이 규정 전압보다 높아질 때는 감지하는 다이오드(D1-D3), 제너 다이오드(ZD1)(ZD2), 저항(R1)(R2), 콘덴서(C1), 트랜지스터(TR1)로된 과전압 검출부(4)와, 전원공급선과 접지선의 합선으로 동작전원들이 규정전압보다 낮아질 때를 감지하는 다이오드(D4-D6), 저항(R3-R5), 트랜지스터(TR2)(TR3)로 된 저전압 검출부(5)와, 동작전원들이 규정 전압 이상이거나 이하일 경우 레귤레이터에 전원 제어신호를 출력하여 시스템으로의 전원공급을 차단하는 저항(R6)(R7)과 트랜지스터(TR4)로 된 전원 제어신호 출력부(6)를 상기 전원공급단에 연결하여 구성하였다.As shown in the figure, a system 3 having a 12V voltage generator 1 and a 9V voltage generator 2 and loaded with various levels of operating power according to a power control signal of a system control microcomputer (not shown) In the normal power supply stage for supplying the power supply, the diodes (D 1 -D 3 ) and the Zener diodes (ZD) for detecting when the operating powers are higher than the specified voltage due to the short circuit of the 12V and 9V voltage generators (1) (2). 1 ) ZD 2 , resistor R 1 (R 2 ), condenser C 1 , transistor TR 1 , overvoltage detector 4, and power supply line and ground line short-circuit, so When the low voltage detection unit 5 consisting of a diode (D 4 -D 6 ), a resistor (R 3 -R 5 ), a transistor (TR 2 ) (TR 3 ) for detecting when the voltage is lowered, and the operating power supply is above or below the specified voltage Resistor (R 6 ) (R 7 ) which cuts power supply to the system by outputting power control signal to the regulator And a power supply control signal output section 6 composed of a transistor TR 4 are connected to the power supply terminal.
이와같이 구성의 시스템 보호회로는 전원 코드를 꽂고 전원 스위치를 온시키면 시스템 제어 마이콤에서 출력된 저전위의 전원제어 신호가 레귤레이터로 인가하고, 레귤레이터에서는 15V, 12V, 9V의 동작전원을 부하가 되는 시스템(3)으로 공급하게 된다.In this way, the system protection circuit of the configuration is connected to the power cord and the power switch is turned on, and the low-voltage power control signal output from the system control microcomputer is applied to the regulator, and the regulator is loaded with 15V, 12V, and 9V operating power. 3).
이때 12V 전압발생기(1)가 단락되면 상기 12V 전압발생기(1)에 입력된 15V의 전압이 그대로 출력되므로 이 전압은 역류 방지용 다이오드(D1)를 거쳐 제너 다이오드(ZD1)에 인가된다.At this time, when the 12V voltage generator 1 is short-circuited, the voltage of 15V inputted to the 12V voltage generator 1 is output as it is, and this voltage is applied to the zener diode ZD 1 via the backflow prevention diode D 1 .
인가된 전압레벨은 설정된 제너 전압보다 높으므로 제너 다이오드(ZD1)는 도통되고, 12.7V로 강하된 전압이 다이오드(D2) 및 저항(R1)(R2)을 통해 트랜지스터(TR1)의 베이스로 인가되며, 이로인해 상기 트랜지스터(TR1)가 도통됨에 따라 트랜지스터(TR4)의 베이스 전위가 낮아져서 트랜지스터(TR4)도 온상태가 된다. 따라서 레귤레이터에는 상기 도통된 트랜지스터(TR4)를 통해 인가된 고전위의 전원제어신호가 인가되고, 이에 따라 레귤레이터에서는 시스템(3)으로 동작전원을 공급하지 않게 된다.Since the applied voltage level is higher than the set zener voltage, the zener diode ZD 1 conducts, and the voltage dropped to 12.7 V is applied to the transistor TR 1 through the diode D 2 and the resistor R 1 (R 2 ). is applied to the base, thereby lowers the base voltage of the transistor (TR 4) as the transistor (TR 1) is conductive is also turned on the transistor (TR 4). Therefore, a high-potential power control signal applied through the conducting transistor TR 4 is applied to the regulator, whereby the regulator does not supply operating power to the system 3.
한편 9V 전압발생기(2)가 단락될 경우에는 12V 전압발생기(1)로 부터 입력된 12V의 전압이 그대로 출력되므로 이 전압은 역류 방지용 다이오드(D3)을 거쳐 제너 다이오드(ZD2)에 인가된다. 인가된 전압에 의해 제너 다이오드(ZD2)가 도통되므로 9.7V로 강하된 전압이 다이오드(D2)를 통해 트랜지스터(TR1)의 베이스로 인가되고, 이로인해 상기 트랜지스터(TR1)(TR4)가 모두 도통되므로 레귤레이터에 고전위의 전원제어신호가 인가되어 시스템(3)에는 동작전원이 공급되지 않게 된다.On the other hand, when the 9V voltage generator 2 is short-circuited, the 12V voltage input from the 12V voltage generator 1 is output as it is, and this voltage is applied to the zener diode ZD 2 via the backflow prevention diode D 3 . . Since the zener diode ZD 2 is conducted by the applied voltage, a voltage dropped to 9.7 V is applied to the base of the transistor TR 1 through the diode D 2 , and thus the transistor TR 1 (TR 4 ). ) Are all conducted so that a high potential power control signal is applied to the regulator so that the operating power is not supplied to the system 3.
15V 전원공급시 접지선과 합선될 경우에는 다이오드(D6)의 캐소드가 접지되므로 전압분배저항(R3)(R4)을 통해 인가된 바이어스 전압에 의해 트랜지스터(TR2)가 온상태로 된다.When the 15V power supply is shorted with the ground line, the cathode of the diode D 6 is grounded, and the transistor TR 2 is turned on by the bias voltage applied through the voltage distribution resistor R 3 and R 4 .
상기 트랜지스터(TR2)가 도통됨에 따라 트랜지스터(TR4)의 베이스 전위가 낮아지므로 트랜지스터(TR4)는 도통되고, 도통된 트랜지스터(TR4)를 통해 고전위의 전원제어 신호가 레귤레이터로 인가되므로 시스템(3)에는 동작전원이 공급되지 않게 된다.It said transistor (TR 2) is because the base potential of the transistor (TR 4) decreases as the conduction transistor (TR 4) is conducted, through the conductive transistor (TR 4), the power control signal on the high potential so supplied to the regulator The operating power is not supplied to the system 3.
한편 12V 전원공급선이 접지선과 합선될경우에는 다이오드(D4)의 캐소드가 접지되므로 전압분배저항(R3)(R4)을 통해 인가된 바이어스 전압에 의해 트랜지스터(TR4)가 도통되고, 아울러 트랜지스터(TR4)도 도통되므로 고전위의 전원 제어신호가 인가되어 시스템(3)으로의 전원공급이 차단된다.On the other hand, when the 12V power supply line is shorted to the ground line, the cathode of the diode D 4 is grounded, so the transistor TR 4 is conducted by the bias voltage applied through the voltage distribution resistor R 3 and R 4 . Since the transistor TR 4 is also conductive, a high potential power control signal is applied to cut off the power supply to the system 3.
또한 9V 전원공급선이 접지선과 합선될 경우에는 다이오드(D5)의 캐소드가 접지되므로 바이어스 전압에 의해 트랜지스터(TR2)가 도통되고, 아울러 트랜지스터(TR4)의 도통으로 고전위의 전원제어신호가 인가되므로 시스템(3)으로의 전원공급이 차단된다.In addition, when the 9V power supply line is shorted to the ground line, the cathode of the diode D 5 is grounded, so that the transistor TR 2 is turned on by the bias voltage, and the high-potential power control signal is turned on by the conduction of the transistor TR 4 . The power supply to the system 3 is cut off because it is applied.
이상에서와 같이 본 고안은 전원공급단의 단락상태를 감지하여 주변 회로로 공급되는 전원을 차단함으로써 부품의 파괴 및 고장을 방지하고, 시스템을 보호할 수 있음은 물론, 오동작을 방지하여 소비자가 원하는 기능을 얻을 수 있도록 하는 효과가 있다.As described above, the present invention detects a short-circuit state of the power supply terminal and cuts off the power supplied to the peripheral circuit, thereby preventing the destruction and failure of components, protecting the system, and preventing the malfunction, which is desired by the consumer. It has the effect of gaining functionality.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019870022708U KR900009631Y1 (en) | 1987-12-22 | 1987-12-22 | Power circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019870022708U KR900009631Y1 (en) | 1987-12-22 | 1987-12-22 | Power circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR890014906U KR890014906U (en) | 1989-08-11 |
| KR900009631Y1 true KR900009631Y1 (en) | 1990-10-15 |
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ID=19270598
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR2019870022708U Expired KR900009631Y1 (en) | 1987-12-22 | 1987-12-22 | Power circuit |
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| Country | Link |
|---|---|
| KR (1) | KR900009631Y1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20000038016A (en) * | 1998-12-03 | 2000-07-05 | 윤종용 | Power supply controller to prevent damage to the load due to overvoltage and undervoltage |
-
1987
- 1987-12-22 KR KR2019870022708U patent/KR900009631Y1/en not_active Expired
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| Publication number | Publication date |
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| KR890014906U (en) | 1989-08-11 |
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