KR910002053Y1 - Over current protective circuit - Google Patents
Over current protective circuit Download PDFInfo
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- KR910002053Y1 KR910002053Y1 KR2019880005107U KR880005107U KR910002053Y1 KR 910002053 Y1 KR910002053 Y1 KR 910002053Y1 KR 2019880005107 U KR2019880005107 U KR 2019880005107U KR 880005107 U KR880005107 U KR 880005107U KR 910002053 Y1 KR910002053 Y1 KR 910002053Y1
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- South Korea
- Prior art keywords
- overcurrent
- voltage
- unit
- constant voltage
- circuit
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- 230000001681 protective effect Effects 0.000 title 1
- 238000001514 detection method Methods 0.000 claims description 11
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 7
- 229910052710 silicon Inorganic materials 0.000 claims description 7
- 239000010703 silicon Substances 0.000 claims description 7
- 239000003990 capacitor Substances 0.000 claims description 6
- 230000006641 stabilisation Effects 0.000 claims description 6
- 238000011105 stabilization Methods 0.000 claims description 6
- 238000009499 grossing Methods 0.000 claims description 5
- 230000000903 blocking effect Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/02—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/0007—Details of emergency protective circuit arrangements concerning the detecting means
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Emergency Protection Circuit Devices (AREA)
- Dc-Dc Converters (AREA)
Abstract
내용 없음.No content.
Description
제1도는 본 고안 과전류 검출회로의 블럭도.1 is a block diagram of an overcurrent detection circuit of the present invention.
제2도는 본 고안 과전류 검출회로의 상세회로도.2 is a detailed circuit diagram of the overcurrent detection circuit of the present invention.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
가 : 정류부 나 : 전원안정화공급장치A: Rectifier B: Power stabilization supply device
다 : 과전류차단부 라 : 정전압부C) overcurrent cutoff part d) constant voltage part
마 : 정전압부 바 : 과전류검출부E: Constant Voltage Bar: Over Current Detector
사 : 부하단 T1: 트랜스4: Load stage T 1 : Transformer
R1, R6: 저항 TR1: 트랜지스터R 1 , R 6 : Resistor TR 1 : Transistor
SCR : 실리콘제어정류소자 RY1: 릴레이SCR: Silicon controlled rectifier RY 1 : Relay
본 고안은 TV 또는 각종 전자기기에 과전류를 검출하기위한 과전류검출회로에 관한것으로 특히 TV 또는 가전기기의 부하단 쇼트시나 기타외부영향으로 전원단에서 부하쪽으로 과전류가 유입되는것을 검출하여 과전류로부터 부하단의 회로를 보호할 수 있도록한 과전류검출회로에 관한것이다.The present invention relates to an overcurrent detection circuit for detecting overcurrent in a TV or various electronic devices. In particular, the present invention detects an overcurrent flowing from a power supply to a load due to a short-circuit of a TV or home appliance or other external influences. The present invention relates to an overcurrent detection circuit capable of protecting the circuit of.
종래의 기기에서는 부하단의 쇼트나 기타외부영향으로 부하단에 과전류가 흐를경우 이를 방지하기위하여 단순히 퓨우즈를 사용하여 주전원을 차단하던가 혹은 별도의 과전류차단회로를 구성하여 부하단의 회로를 보호하도록 하였으나 이들은 돌발적으로 발생되는 부하단의 쇼트나 기타 외부영향으로 인한 과전류에 대하여 효과적으로 대처할 수 없는 문제점을 가지고 있었다.In the conventional equipment, in order to prevent an overcurrent flowing in the load stage due to a short circuit of the load stage or other external influences, the fuse of the main circuit is cut off by simply using a fuse or by configuring a separate overcurrent cut-off circuit to protect the circuit of the load stage. However, they had a problem in that they could not effectively cope with overcurrents caused by accidental short-circuit or other external influences.
본 고안은 상기와같은 문제점을 해결하기위하여 입력되는 전원전압을 정류부를 통하여 정류한후 이 정류된전압을 전압강하하여 안정화된 전압으로 만들어 공급하는 전원안정화 공급장치와 과전류가 유입되는 것을 차단하는 과전류차단부와 부하단에 정전압을 공급하는 정전압부와 상기 과전류차단부에 구동전압을 공급하는 정전압부와 상기 부하단에 과전류를 검출하는 과전류검출부를 구성하여 부하단의 쇼트나 외부영향으로 부하단에 유입되는 과전류를 차단함으로써 부하단의 회로를 보호할 수 있도록 한것으로 이하첨부된 도면에 의하여 본고안을 상세히 설명하면 다음과 같다.In order to solve the above problems, the present invention rectifies the input power supply voltage through a rectifying unit, and then supplies a power stabilization supply device that supplies the stabilized voltage by dropping the rectified voltage to a stabilized voltage, and an overcurrent to block inflow of overcurrent. It consists of a constant voltage part supplying a constant voltage to the cutoff part and the load end, a constant voltage part supplying a driving voltage to the overcurrent interruption part, and an overcurrent detection part detecting an overcurrent to the load end. This circuit is described in detail with reference to the accompanying drawings as follows.
제1도 및 제2도에 도시한바와같이 입력되는 전원전압(AC)을 전파정류하는 정류부(가)와 정류된 전압을 평활하는 평활용콘텐서(C1)와 이 평활된 전압을 정전압으로 만들어 부하단(사)에 공급하는 정전압부(라)로 구성하여서된 전원공급회로에 있어서, 상기 전원공급회로에 정류부(가) 및 콘덴서(C1)에 의하여 정류되고 평활된 전압을 전압강하하여 안정화된 전압으로 만드는 트랜스(T1) 및 제어단(CON)을 갖는 전원안정화공급장치(나)와 과전류검출시 주전원을 차단하는 릴레이(RY1)로 된 과전류차단부(다)와 상기 과전류차단부(다)의 구동전압을 공급하는 정전압부(마)와, 상기 정전압부(라) 및 부하단(사)에 나타나는 과전류를 검출하는 가연성저항(R1)(R1') 트랜지스터(TR1) 저항(R2)(R4) 및 실리콘 제어정류소자(SCR)로된 과전류검출부(바)를 구성하여서 된것으로, 도면중 미설명부호 plug 플러그이다.As shown in FIGS. 1 and 2, the rectifying unit (A) for full-wave rectifying the input power voltage (AC), the smoothing capacitor (C 1 ) for smoothing the rectified voltage, and the smoothed voltage as constant voltage In the power supply circuit composed of a constant voltage unit (D) to be supplied to the load stage (g), the voltage rectified and smoothed by the rectifying unit (A) and the capacitor (C 1 ) to the power supply circuit by The over-current cut-off unit (C) and the over-current cut-off unit consisting of a power stabilization supply device (B) having a transformer (T 1 ) and a control terminal (CON) which make a stabilized voltage, and a relay (RY 1 ) which cuts off the main power when over-current detection A constant voltage section (e) for supplying a negative driving voltage and a combustible resistor (R 1 ) (R 1 ′ ) transistor (TR 1 ) for detecting an overcurrent appearing in the constant voltage section (D) and the load terminal (G). ) An overcurrent detector (bar) composed of a resistor (R 2 ) (R 4 ) and a silicon controlled rectifier (SCR) In this figure, the description plug plug is not shown.
상기와 같이 구성된 본 고안의 작용효과를 상세히 설명하면 다음과 같다.Referring to the effect of the present invention configured as described above in detail.
먼저 플러그(plug)를 콘덴서(도시되지 않음)에 꽂으면 입력전압(AC)은 정류부(가)에 의하여 전파정류되고 이 전파정류된 전압은 평활용 콘덴서(C1)에 의하여 평활된 전압을 전원안정화공급장치(나)의 트랜스(T1)를 통하여 적정한 전압으로 강하되고 제어단(CON)에 의하여 제어되어 과전류차단부(다)의 릴레이(RY1)의 접점단자에 인가됨과 동시에 상기 평활된 전압은 상기 과전류차단부(다)에 구동전압을 공급하는 정전압부(마)의 분압저항(R5)(R6)에 의하여 분압되어 저항(R3)를 통하여 레귤레이터(REG)에 인가되어 정전압을 상기 과전류차단부(다)의 릴레이(RY1)의 코일(L)에 인가되게된다.First, when a plug is plugged into a capacitor (not shown), the input voltage AC is full-wave rectified by the rectifier, and the full-wave rectified voltage supplies the voltage smoothed by the smoothing capacitor C 1 . The voltage is lowered to an appropriate voltage through the transformer T 1 of the stabilization supply device B, controlled by the control terminal CON, and applied to the contact terminal of the relay RY 1 of the overcurrent cut-off unit c. The voltage is divided by the voltage dividing resistors R 5 and R 6 of the constant voltage unit e that supplies the driving voltage to the overcurrent cut-off unit c . The voltage is applied to the regulator REG through the resistor R 3 to be a constant voltage. Is applied to the coil L of the relay RY 1 of the overcurrent cut-off unit (C).
한편 상기 과전류차단부(다)에 인가된 전압은 정상시에 릴레이(RY1)의 접점단자(P)가 온상태이므로 정전압부(라)에 인가되어 이 정전압부(라)에 의하여 일정한 전압으로 유지되면서 과전류검출부(바)의 저항(R1)(R1')을 통하여 부하단(사)에 정전압을 공급하게 되는것이다.On the other hand, since the contact terminal P of the relay RY 1 is in an on state in the normal state, the voltage applied to the overcurrent cut-off part C is applied to the constant voltage part D so as to be a constant voltage by the constant voltage part D. While maintaining, it is to supply a constant voltage to the load terminal (g) through the resistance (R 1 ) (R 1 ') of the overcurrent detection unit (bar).
상기와 같이 동작하던중 부하단(사)의 쇼트나, 외부의 영향으로 인하여 과전류가 부하단(사) 또는 입력전압(AC)에 나타나게 되면 상기 과전류검출부(바)의 가연성저항(R1)(R1')의 양단전압이 높아지게 되어 트랜지스터(TR1)의 에미터단자와 베이스단자에 전위가 인가되게 되므로 트랜지스터(TR1)는 온상태가 되어 상기 정전압부(라)와 부하단(사)에서 나타난 과전류가 트랜지스터(TR1)의 에미터단자 및 콜렉터단자 그리고 저항(R2)을 통하여 실리콘제어정류소자(SCR)의 게이트단자(G)에 인가되게 된다.During operation as described above, if an overcurrent appears in the load terminal or the input voltage AC due to a short of the load terminal or an external influence, the combustible resistance R 1 of the overcurrent detection unit (bar) ( R 1 ') because of the both-end voltage is higher so that the potential on the emitter terminal and the base terminal of the transistor (TR 1) is a transistor (TR 1) is in the oN state at the bottom portion and the constant voltage portion (d) (S) The overcurrent shown in FIG. 2 is applied to the gate terminal G of the silicon controlled rectifier SCR through the emitter terminal, the collector terminal of the transistor TR 1 , and the resistor R 2 .
따라서 실리콘제어정류소자(SCR)는 도통상태가 되므로 상기 정전압부(마)로 부터 과전류차단부(다)의 릴레이(RY1) 코일(L)에 전압이 흘러 상기 과전류검출부(바)의 실리콘제어정류소자(SCR)의 에노우드단자 및 캐소우드단자를 통하여 접지되게 되어 상기 과전류차단부(라)의 릴레이(RY1)가 구동하게된다.Therefore, since the silicon control rectifier SCR is in a conducting state, a voltage flows from the constant voltage unit e to the relay RY 1 coil L of the overcurrent blocking unit C. The silicon control of the overcurrent detection unit F is performed. Grounding is performed through the anode and cathode terminals of the rectifying element SCR, so that the relay RY 1 of the overcurrent cut-off part D is driven.
따라서 릴레이(RY1)의 접점단자(9)를 오프시켜 주게되므로 상기 전원안정화공급장치(나)로 부터 전압이 정전압부(라)에 공급되지 않게되어 과전류가 부하단(사)에 공급되지 않게되는 것이다.Therefore, since the contact terminal 9 of the relay RY 1 is turned off, the voltage is not supplied from the power stabilization supply device (b) to the constant voltage part (d) so that the overcurrent is not supplied to the load terminal (g). Will be.
이때 상기 부하단(사)에 주전원이 차단되어도 실리콘 제어정류소자(SCR)는 항상 온상태를 유지하므로 과전류로부터 회로를 항상 보호할 수 있는 것이다.At this time, even if the main power is cut off at the load terminal, the silicon controlled rectifier (SCR) is always kept on, thereby protecting the circuit from overcurrent.
이어서 다시 재동작시키려면 전원 오프후 다시 온시키면 정상동작을 다시하게되는 것이다.If you want to resume the operation again, turn the power off and on again to resume normal operation.
이상에서 설명한 바와같이 본 고안은 TV나 기타 가전기기의 부하단 쇼트나 기타 외부영향으로 인하여 과전류가 유입되는 경우를 과전류검출부로서 검출하여 부하단에 주전원이 인가되는 것을 차단함으로써 과전류가 부하단에 인가되지 않게되므로 부하단의 회로를 보호하게 되어 기기의 오동작을 방지할 수 있고 아울러 기기의 수명을 장구히 할 수 있는 잇점을 제공해 줄 수 있는 것이다.As described above, the present invention detects a case in which an overcurrent flows due to a short circuit load or other external influence of a TV or other home appliance as an overcurrent detector, and blocks the main power from being applied to the load stage, thereby applying the overcurrent to the load stage. Since it protects the circuit of the load stage, it can prevent the malfunction of the device and also provide the advantage of prolonging the life of the device.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019880005107U KR910002053Y1 (en) | 1988-04-08 | 1988-04-08 | Over current protective circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019880005107U KR910002053Y1 (en) | 1988-04-08 | 1988-04-08 | Over current protective circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR890021865U KR890021865U (en) | 1989-11-03 |
| KR910002053Y1 true KR910002053Y1 (en) | 1991-03-30 |
Family
ID=19274109
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR2019880005107U KR910002053Y1 (en) | 1988-04-08 | 1988-04-08 | Over current protective circuit |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR910002053Y1 (en) |
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1988
- 1988-04-08 KR KR2019880005107U patent/KR910002053Y1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| KR890021865U (en) | 1989-11-03 |
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