KR0116581Y1 - Input voltage automatic switching circuit of electronic equipment - Google Patents
Input voltage automatic switching circuit of electronic equipment Download PDFInfo
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- KR0116581Y1 KR0116581Y1 KR2019930024569U KR930024569U KR0116581Y1 KR 0116581 Y1 KR0116581 Y1 KR 0116581Y1 KR 2019930024569 U KR2019930024569 U KR 2019930024569U KR 930024569 U KR930024569 U KR 930024569U KR 0116581 Y1 KR0116581 Y1 KR 0116581Y1
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- 239000003990 capacitor Substances 0.000 claims description 9
- 238000009499 grossing Methods 0.000 claims description 4
- 230000006378 damage Effects 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 2
- 210000004899 c-terminal region Anatomy 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of DC power input into DC power output
- H02M3/22—Conversion of DC power input into DC power output with intermediate conversion into AC
- H02M3/24—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters
- H02M3/28—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC
- H02M3/325—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33507—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
본 고안은 110V 전원전압과 220V 전원전압을 겸용으로 사용하는 전자기기에서 현재 입력되는 전원전압에 대응하여 전압제어부를 선택적으로 절환하므로써 과전압에 의한 구성소자의 파괴를 미연에 방지할 수 있도록 한 전자기기의 입력전압 자동전환회로에 관한 것이다.The present invention is an electronic device that can prevent the destruction of components due to overvoltage by selectively switching the voltage control unit in response to the current input voltage from the electronic device that uses both 110V and 220V power voltages. It relates to an input voltage automatic switching circuit of.
본 고안은 110V와 220V를 각각 정류하여 부하단에 공급하는 제1 및 제2 전압제어부를 전단에 설치하고, 110V 전원전압이 인가될 경우 제 2전압제어부를 회로 연결하고 220V 전원전압이 인가될 경우 제 1전압제어부를 회로 연결하는 절환부를 구비한다. 따라서, 본 고안은 수동조작에 의해 과도한 입력전원이 공급되어 구성소자들이 파괴되는 것을 근원적으로 방지할 수 있을 뿐만 아니라 입력전원에 적합한 전압제어부에 의해 정류된 직류전원을 부하단에 안정적으로 공급할 수 있는 효과가 있다.The present invention rectifies 110V and 220V, respectively, and installs the first and second voltage controllers for supplying the load to the front end. When 110V power voltage is applied, the second voltage controller is connected to a circuit and 220V power voltage is applied. And a switching unit for connecting the first voltage control unit to a circuit. Therefore, the present invention not only prevents excessive input power from being supplied by manual operation and destroys the components, but also stably supplies the DC power rectified by the voltage control unit suitable for the input power to the load end. It works.
Description
본 고안은 110V 전원전압과 220V 전원전압을 겸용으로 사용하는 전자기기에서 현재 입력되는 전원전압에 대응하여 전압제어부를 선택적으로 절환하므로써 과전압에 의한 구성소자의 파괴를 미연에 방지할 수 있도록 한 전자기기의 입력전압 자동절환회로에 관한 것이다The present invention is an electronic device that can prevent the destruction of components due to overvoltage by selectively switching the voltage control unit in response to the current input voltage from the electronic device that uses both 110V and 220V power voltages. Relates to an automatic switching circuit of input voltage
도1은 종래기술에 따른 전자기기의 입력전압 자동절환회로도이다. 도시한 바와 같이, 전원 코드를 통해 입력되는 전원전압에 대해 전압강하하는 강압트랜스(T1)와, 사용자의 수동조작에 의해 전원전압의 공급경로를 절환하는 절환스위치(SW1)와, 전압강하된 전압에 따라 충방전하는 콘덴서(C1)과, 콘덴서(C1)의 출력전압이 과도하게 변동되는 안정화시키는 과전압제어소자(TNR)와, 공급전압을 직류전원을 변환하기 위한 직류트랜스(T2)로 구성된다. 이러한 종래기술에 의하면 입력전원에 적합하에 사용자가 절환스위치(SW1)를 절환하도록 되어 있다. 일예로, 전원코드를 통해 110V 의 전원전압을 인가할 경우에는 사전에 사용자가 절환스위치(SW1)의 A단자와 B단자를 접속시키는 절환동작을 선행하여야 하고, 전원코드를 통해 220V 전원전압을 인가할 경우에는 사전에 사용자가 절환스위치(SW1)의 A단자의 C단자를 접속시키고, B단자와 D단자를 접속시키는 동작을 선행하여야 한다.1 is an input voltage automatic switching circuit diagram of an electronic apparatus according to the prior art. As shown, a step-down transformer T1 for dropping the voltage to the power supply voltage input through the power cord, a switching switch SW1 for switching the supply path of the power supply voltage by a user's manual operation, and a voltage dropping voltage. Condenser C1 charged and discharged, an overvoltage control element TNR for stabilizing the output voltage of the capacitor C1 excessively fluctuating, and a direct current transformer T2 for converting the supply voltage to a direct current power source. . According to this prior art, the user switches the switching switch SW1 to suit the input power source. For example, in the case of applying the power supply voltage of 110V through the power cord, the user must first perform the switching operation of connecting the A terminal and the B terminal of the switching switch SW1, and apply the 220V power voltage through the power cord. In this case, the user must first connect the C terminal of the A terminal of the switch SW1 and the B terminal to the D terminal.
절환스위치(SW1)의 절환동작이 완료된후 110V의 전원전압은 A단자와 B단자의 접속에 의해 파선의 화살표방향을 따라 후단으로 전원전압이 인가되며, 220V의 전원전압은 A단자와 C단자의 접속에 의해 강압트랜스(T1)에 의해 전압강하된후 B단자와 D단자의 접속에 의해 실선의 화살표방향을 따라 후단으로 전원전압이 인가하게 된다.After the switching operation of the switching switch SW1 is completed, the power supply voltage of 110V is applied to the rear end in the direction of the broken arrow by the connection of terminal A and terminal B. The power supply voltage of 220V is applied to terminal A and C. After the voltage is dropped by the step-down transformer T1 by the connection, the power supply voltage is applied to the rear end in the arrow direction of the solid line by the connection of the B terminal and the D terminal.
그러나, 종래기술에 따른 전자기기의 입력전원 자동절환회로에서는 사용자가 절환스위치(SW1)를 일일이 절환해야 하는등 번거롭고 불편하였으며, 부주의로 인해 절환스위치를 잘못 절환한 상태에서 전원코드를 통해 입력전원이 인가될시 구성소자들이 파괴되는 문제점이 있었다.However, in the input power automatic switching circuit of the electronic device according to the prior art, it is cumbersome and inconvenient for the user to switch the switching switch SW1 one by one, and the input power is changed through the power cord in a state in which the switching switch is inadvertently changed due to carelessness. There was a problem that the components are destroyed when applied.
본 고안은 목적은 110V 전원전압과 220V 전원전압을 겸용으로 사용하는 전자기기에서 현재 입력되는 전원전압에 대응하여 전압제어부를 선택적으로 절환하므로써 과전압에 의한 구성소자의 파괴를 미연에 방지할 수 있도록 한 전자기기의 입력전압 자동절환회로를 제공함에 있다.The object of the present invention is to prevent the destruction of components due to overvoltage by selectively switching the voltage controller in response to the current input voltage in an electronic device using both 110V and 220V power voltages. It is to provide an input voltage automatic switching circuit of an electronic device.
제1도는 종래기술에 따른 전자기기의 입력전압 자동전환회로도1 is an input voltage automatic switching circuit diagram of an electronic apparatus according to the prior art.
제2도는 본 고안에 따른 전자기기의 입력전압 자동전환회로도2 is an input voltage automatic switching circuit diagram of an electronic device according to the present invention.
＊ 도면의 주요부분에 대한 부호의 설명＊ Explanation of symbols on main parts of drawing
10 : 제1전압제어부 20 : 제2전압제어부10: first voltage controller 20: second voltage controller
30 : 전원전압감지부 40 : 비교부30: power supply voltage detection unit 40: comparison unit
50 : 절환부50: switching part
상기와 같은 본 고안의 목적은 110V 전원전압과 220V 전원전압을 겸용으로 사용하는 전자기기에 있어서, 상기 220V 전원전압을 공급받는 제1트랜스(T3)와, 상기 제1트랜스(T3)에 의해 강하된 전압을 직류전압으로 정류는 브리지다이오드(BD1)와, 정류된 직류전압을 평활하는 콘덴서(C2)로 이루어진 제1전압제어부(10); 상기 110V 전원전압을 공급받는 제2트랜스(T4)와, 상기 제2트랜스(T4)에 의해 강하된 전압을 직류전압으로 정류하는 브리지다이오드(BD2)와, 정류된 직류전압을 평활하는 콘덴서(C3)와, 정류된 직류전압에 대해 일정한 전압을 출력하는 정전압소자(REG)로 이루어진 제2전압제어부(20); 상기 제1전압제어부에 연결되어 제너전압이상인 경우에 구동되는 제너다이오드와, 상기 제 1전압제어부에 인가되는 220V전압을 분압하는 분압저항으로 이루어진 전원전압감지부(30); 상기 전원전압감지부에 연결되어 상기 제너다이오드의 구동에 따른 구동전원과 감지된 전압전원을 비교하고, 그 비교결과에 따라 비교결과신호를 출력하는 비교부(40); 및 상기 비교부의 비교결과신호에 따라 구동하는 제 1트랜지스터(TR1)과 상기 제 1트랜지스터(TR1)의 구동에 따라 입력전원을 상기 제 1전압제어부 또는 제 2전압제어부로 인가하도록 절환하는 릴레이로 이루어진 절환부(50)에 의하여 달성된다.An object of the present invention as described above is a drop in the first transformer (T3) and the first transformer (T3) receiving the 220V power supply voltage in an electronic device using a 110V power supply voltage and a 220V power supply. A first voltage controller 10 formed of a bridge diode BD1 for rectifying the converted voltage into a DC voltage and a capacitor C2 for smoothing the rectified DC voltage; A second transformer T4 receiving the 110V power supply voltage, a bridge diode BD2 rectifying the voltage dropped by the second transformer T4 into a DC voltage, and a capacitor C3 smoothing the rectified DC voltage. A second voltage controller 20 including a constant voltage element REG for outputting a constant voltage with respect to the rectified DC voltage; A power supply voltage detector (30) including a zener diode connected to the first voltage controller and driven when the zener voltage is higher than the zener voltage, and a voltage divider for dividing a voltage of 220V applied to the first voltage controller; A comparison unit 40 connected to the power supply voltage sensing unit for comparing the driving power according to the driving of the zener diode with the sensed voltage power and outputting a comparison result signal according to the comparison result; And a relay for switching input power to the first voltage controller or the second voltage controller according to the driving of the first transistor TR1 and the first transistor TR1 driven according to the comparison result signal of the comparator. It is achieved by the switch 50.
이하, 본 고안의 바람직한 일실시예를 첨부도면에 따라 상세히 설명한다.Hereinafter, a preferred embodiment of the present invention will be described in detail according to the accompanying drawings.
도2는 본 고안의 입력전압 자동절환장치의 회로도로서, 전원코드를 통해 220V전원을 공급받아 정류하는 제1전압제어부(10)와, 전원코드를 통해 110V전원을 공급받아 정류하는 제2전압제어부(20)와, 상기 제1전압제어부(10)의 출력전압을 감지하는 전원전압감지부(30)와, 감지된 전원전압과 기준전압을 비교하는 비교부(40)와, 전원전압에 따라 상기 제1전압제어부(10)와 제2전압제어부(20)를 선택적으로 절환하는 절환부(50)로 구성된다.2 is a circuit diagram of the input voltage automatic switching device of the present invention, the first voltage control unit 10 for rectifying by receiving 220V power through the power cord, and the second voltage control unit for receiving and rectifying 110V power through the power cord. 20, the power supply voltage detector 30 for detecting the output voltage of the first voltage controller 10, the comparator 40 for comparing the detected power supply voltage with the reference voltage, and the power supply voltage according to the power supply voltage. The switch unit 50 selectively switches the first voltage controller 10 and the second voltage controller 20.
제1전압제어부(10)와 제2전압제어부(20)는 절환부(50)의 릴레이(RY1)구동에 다라 단자들(P.E.T)이 절환되는 상태에 따라 전원입력단(AC)으로부터 220V 또는 110V를 각각 인가받는다. 단자들(P,E,T)은 동작초기에는 단자(P)와 단자(E)가 접속되며, 전원전압에 따라 단자들(P,E,T)의 연결상태는 변경되며, 전원공급이 중단되면 초기상태와 같이 단자(P)와 단자(E)가 접속된다.The first voltage control unit 10 and the second voltage control unit 20 receive 220V or 110V from the power input terminal AC according to a state in which the terminals PET are switched according to the relay RY1 driving of the switching unit 50. Each is licensed. Terminals P, E, and T are initially connected to terminal P and terminal E, and the connection state of terminals P, E, and T is changed according to the power supply voltage, and the power supply is stopped. Terminal and the terminal E are connected as in the initial state.
제1전압제어부(10)는 전원입력단에 연결된 트랜스(T3)와, 브리지다이오드(BD1), 콘덴서(C2)로 이루어져 220V전원을 정류하여 부하측에 동작전원으로 제공된다. 제2전압제어부(20)는 전원입력단(AC)에 연결된 과전압제어소자(TNR) 및 트랜스(T4)와, 브리지다이오드(BD2), 콘덴서(C3), 정전압소자(REG)로 이루어져 110V전원을 정류하여 부하측에 동작전원으로 제공된다. 전원전압감지부(30)는 제 1전압제어부(1)에 인가된 전원전압에 따라 도통되는 제너다이오드(ZD)와 분압저항(R)으로 이루어진다. 비교부(40)는 구동전원(12V)을 분압하는 분압저항(R1)(R2)과 분압저항(R1)(R2)에 의해 분압된 기준전압과 전원전압감지부(30)에 의해 감지된 전원전압을 감지하는 비교기(COMP)로 이루어진다. 절환부(50)은 구동저항(R3)을 매개로 하여 비교기(COMP)의 출력신호를 인가받는 트랜지스터(TR1)와 트랜지스터(TR1)의 콜렉터단에 연결된 단자들(P,E,T)들을 절환하는 릴레이(RY1)로 이루어진다.The first voltage controller 10 includes a transformer T3 connected to a power input terminal, a bridge diode BD1, and a capacitor C2 to rectify 220V power and provide it as an operating power source to a load side. The second voltage controller 20 includes an overvoltage control device TNR and a transformer T4 connected to the power input terminal AC, a bridge diode BD2, a capacitor C3, and a constant voltage device REG to rectify the 110V power supply. To the load side as the operating power source. The power supply voltage detector 30 includes a zener diode ZD and a voltage dividing resistor R, which are conducted according to a power supply voltage applied to the first voltage controller 1. The comparator 40 is a reference voltage divided by the divided resistors R1 and R2 and the divided resistors R1 and R2 for dividing the driving power supply 12V, and the power detected by the power supply voltage detector 30. It consists of a comparator (COMP) that senses the voltage. The switching unit 50 switches the transistors TR1 receiving the output signal of the comparator COMP and the terminals P, E, and T connected to the collector terminal of the transistor TR1 via the driving resistor R3. Consisting of a relay RY1.
상기와 같이 구성되는 본 고안의 작용효과를 설명하면 다음과 같다.Referring to the effect of the present invention is configured as described above are as follows.
먼저, 전원코드를 통해 110V 전원전압이 공급되는 경우, 초기상태로 단자(P)와 단자(E)가 접속되어 110V 전원전압은 트랜스(T3)에 인가되고, 브리지다이오드(BD)에 의해 정류되고 이 정류된 전압은 콘덴서(C2)에 의하여 평활되어 전원전압감지부(30)의 네저다이오드(ZD1)(에 인가된다. 상기 제너다이오드(ZD)는 220V에 대한 직류전압에 의해 도통되도록 동작전압(실시예에서는 20V)을 설정하고 있어서 110V의 전원전압에 대한 직류전압으로는 도통되지 않는다. 이에 따라 비교부(40)의 비교기(COMP)의 반전단자(-)에 입력전압은 비반전단자(+)에 입력되는 기준전압 보다 작게되여, 비교기COMP) 는 '하이' 신호를 출력하게 된다. 절환부(50)의 트랜지스터(TR1)는 동작저항(R1)을 통해 비교기(COMP)는 '하이'신호를 인가받아 '온'상태가 된다. 트랜지스터(TR1)이 '온'되면 릴레이(RY1)도 도통됨에 따라 단자(P)는 단자(F)에 접속된다. 따라서, 110V 전원전압은 제2전압제어부(20)를 통해 정류되어 부하측으로 동작전원을 공급하게 된다.First, when the 110V power supply voltage is supplied through the power cord, the terminal P and the terminal E are initially connected, and the 110V power supply voltage is applied to the transformer T3, and rectified by the bridge diode BD. The rectified voltage is smoothed by the capacitor C2 and applied to the negative diode ZD1 of the power supply voltage detection unit 30. The zener diode ZD is operated by a direct current voltage of 220V. In the embodiment, 20 V) is set so that it is not conducted with a DC voltage with respect to a power supply voltage of 110 V. Accordingly, the input voltage is supplied to the inverting terminal (-) of the comparator COMP of the comparator 40 with the non-inverting terminal (+). ) Becomes smaller than the reference voltage input to the comparator, and the comparator COMP outputs a high signal. The transistor TR1 of the switching unit 50 receives the 'high' signal through the operating resistor R1 to be in an 'on' state. When the transistor TR1 is 'on', the relay RY1 is also turned on so that the terminal P is connected to the terminal F. As shown in FIG. Therefore, the 110V power supply voltage is rectified through the second voltage controller 20 to supply the operating power to the load side.
반면에, 전원코드를 통해 220V 전원전압이 공급되는 경우, 220V 전원전압은 트랜스(T3)에 인가되고, 브리지다이오드(BD)에 의해 정류되고 이 정류된 전압은 콘덴서(C2)에 의하여 평활되어 전원전압감지부(30)의 제너다이오드(ZD1)에 인가된다.On the other hand, when the 220V power voltage is supplied through the power cord, the 220V power voltage is applied to the transformer T3, rectified by the bridge diode BD, and the rectified voltage is smoothed by the capacitor C2 to supply power. The zener diode ZD1 of the voltage sensing unit 30 is applied.
상기 제너다이오드(ZD)는 220V에 대한 직류전압이 인가되므로 동작전압을 만족하여 도통된다. 이에 따라 비교부(40)의 비교기(COMP)의 반전단자(-)에 입력전압은 비반전단자(+)에 입력되는 기준전압 보다 크게 되여, 비교기(COMP)는 '로우'신호를 출력하게 된다. 이에 따라 전환부(50)의 트랜지스터(TR1)는 '오프'되고, 릴레이(RY1)도 도통되지 않게 되어 단자(P)와 단자(E)는 초기상태를 유지하게 된다. 따라서, 220V 전원전압은 제 1전압제어부(20)를 통해 정류되어 부하측으로 동작전원을 공급하게 된다.Since the Zener diode ZD is applied with a DC voltage of 220V, the zener diode ZD is conducted to satisfy the operating voltage. Accordingly, the input voltage to the inverting terminal (-) of the comparator COMP of the comparator 40 becomes larger than the reference voltage input to the non-inverting terminal (+), so that the comparator COMP outputs a 'low' signal. . As a result, the transistor TR1 of the switching unit 50 is 'off', and the relay RY1 is also not conductive so that the terminal P and the terminal E maintain their initial state. Accordingly, the 220V power supply voltage is rectified through the first voltage control unit 20 to supply operating power to the load side.
이상에서 설명한 바와 같이, 본 고안은 110V 와 220V 전원전압을 겸용으로 사용하는 전자기기에서 입력측으로부터 공급되는 전원전압에 맞는 전압제어부를 적응적으로 절환시켜 부하측으로 공급할 수 있어서 종래와 같이 수동조작에 의존하여 전원전압을 설정시 부주의로 인한 구성기기들이 손상되는 것을 미연에 방지할 수 있으며, 110V와 220V 전원전압에 대응하여 개별적으로 정류된 직류전원을 부하측에 안정적으로 공급할 수 있는 효과가 있다.As described above, the present invention can be switched to the load side by adaptively switching the voltage control unit corresponding to the power supply voltage supplied from the input side in the electronic device using both 110V and 220V power supply voltage to rely on manual operation as in the prior art Therefore, it is possible to prevent damage to components due to carelessness when setting the power supply voltage, and it is possible to stably supply the rectified DC power to the load side in response to the 110V and 220V power supply voltages.
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Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019930024569U KR0116581Y1 (en) | 1993-11-22 | 1993-11-22 | Input voltage automatic switching circuit of electronic equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019930024569U KR0116581Y1 (en) | 1993-11-22 | 1993-11-22 | Input voltage automatic switching circuit of electronic equipment |
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| Publication Number | Publication Date |
|---|---|
| KR950015789U KR950015789U (en) | 1995-06-19 |
| KR0116581Y1 true KR0116581Y1 (en) | 1998-04-22 |
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| KR2019930024569U KR0116581Y1 (en) | 1993-11-22 | 1993-11-22 | Input voltage automatic switching circuit of electronic equipment |
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