KR870001301Y1 - Power circuit - Google Patents

Power circuit Download PDF

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Publication number
KR870001301Y1
KR870001301Y1 KR2019840009062U KR840009062U KR870001301Y1 KR 870001301 Y1 KR870001301 Y1 KR 870001301Y1 KR 2019840009062 U KR2019840009062 U KR 2019840009062U KR 840009062 U KR840009062 U KR 840009062U KR 870001301 Y1 KR870001301 Y1 KR 870001301Y1
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South Korea
Prior art keywords
power supply
comparator
relay
supply voltage
output
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KR2019840009062U
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Korean (ko)
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KR860004150U (en
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최영훈
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대우전자주식회사
김용원
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P13/00—Arrangements for controlling transformers, reactors or choke coils, for the purpose of obtaining a desired output
    • H02P13/06—Arrangements for controlling transformers, reactors or choke coils, for the purpose of obtaining a desired output by tap-changing; by rearranging interconnections of windings
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
    • G05F1/10—Regulating voltage or current
    • G05F1/12—Regulating voltage or current wherein the variable actually regulated by the final control device is ac
    • G05F1/14—Regulating voltage or current wherein the variable actually regulated by the final control device is ac using tap transformers or tap changing inductors as final control devices
    • 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
    • H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
    • H02M5/02—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc
    • H02M5/04—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters
    • H02M5/10—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using transformers
    • H02M5/12—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using transformers for conversion of voltage or current amplitude only

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Automation & Control Theory (AREA)
  • Direct Current Feeding And Distribution (AREA)

Abstract

내용 없음.No content.

Description

전원전압절환회로Power supply voltage switching circuit

제1(a)도, 제1(b)도는 각각 종래의 전원전압절환회로를 나타낸 간략한 회로도.1 (a) and 1 (b) are simplified circuit diagrams each showing a conventional power supply voltage switching circuit.

제 2 도는 본 고안의 양호한 실시예의 회로도.2 is a circuit diagram of a preferred embodiment of the present invention.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

T1, T2: 트랜스 C : 비교기T 1 , T 2 : Trans C: Comparator

V, V' : 부하측단자 C' : 비교회로부V, V ': Load side terminal C': Comparison circuit

B1: A1, A2, A3: 릴레이접점 Ry : 릴레이B 1 : A 1 , A 2 , A 3 : Relay contact Ry: Relay

본 고안은 전원회로에 관한 것으로, 특히 100V/200V 겸용 전기기구의 전원전압 자동절환회로에 관한 것이다.The present invention relates to a power supply circuit, and more particularly to a power supply voltage automatic switching circuit of a 100V / 200V combined electric appliance.

종래에 100V와 220V를 겸용하는 전기기구의 전원전압 절환에 있어서 간단히 절환 스위치를 설치하여 사용하거나 자동전압절환 회로를 부가적으로 설치하여 사용하게 한 것이 있다. 절환 스위치를 사용하게 한 경우, 사람의 손으로 전원 전압에 맞추어 일일이 스위치를 절환시켜야 하는 불편이 있었으며, 전원 전압 선택 조정이 잘못되었을 때 부품의 손상 또는 기기가 오동작하는 등의 사례가 빈번히 발생되고 있다.Conventionally, in switching the power supply voltage of an electric appliance that uses both 100V and 220V, there is one that simply uses a switching switch or additionally installs an automatic voltage switching circuit. When the changeover switch is used, it is inconvenient to switch the switch manually according to the power supply voltage, and there are frequent cases of component damage or malfunction of the device when the power supply voltage selection adjustment is incorrect. .

이 경우, 간단히 퓨우즈 하나만을 갈아 끼운다 하더라도 사용자에게는 큰 부담을 주는 결과가 된다. 또, 종래의 자동 전압 절환회로를 사용할 경우 회로 구성이 복잡하여 원가 상승을 초래하거나 릴레이 사용시 전원전압의 계속적인 통전으로 인해 소비전력의 상승과 릴레이의 내구성 및 신뢰성을 기대할 수 없게 되었다.In this case, even if only one of the fuses to be replaced, the result is a big burden on the user. In addition, when the conventional automatic voltage switching circuit is used, the circuit configuration is complicated, resulting in an increase in cost, or the increase in power consumption and durability and reliability of the relay cannot be expected due to the continuous energization of the power supply voltage when the relay is used.

본 고안은 상기한 단점을 감안하여 된 것으로, 따라서 본 고안의 목적은 전원전압의 절환을 수동으로 선택 조정하지 않고 회로구성이 간단하며, 릴레이의 동작시 과다한 전력이 소비되지 않고서도 정확한 전원전압의 절환이 가능한 자동 전압 절환회로를 제공하는 데 있다.The present invention has been made in view of the above-described disadvantages, and therefore, the object of the present invention is to provide a simple circuit configuration without manually selecting and adjusting the switching of the power supply voltage, and to provide an accurate power supply voltage without excessive power consumption during operation of the relay. It is to provide an automatic voltage switching circuit that can be switched.

즉, 본 고안의 자동전원전압절환회로는 릴레이 구동에 필요한 전압을 정류회로를 통한 직류전압으로 사용하고, 제너 다이오드와 저항에 의한 전위차를 비교기의 입력단에 인가시켜 전원의 변동이 있을 경우 비교기 출력의 변화를 이용하여 릴레이를 제어함으로써 트랜스의 입출력단 및 트랜스의 바이패스선에 연결된 릴레이 접점들을 개폐시키게 된다.That is, the automatic power supply voltage switching circuit of the present invention uses the voltage required for driving the relay as a DC voltage through the rectifier circuit, and applies the potential difference between the zener diode and the resistor to the input terminal of the comparator to change the output of the comparator By controlling the relay using the change, the relay contacts connected to the I / O terminal of the transformer and the bypass line of the transformer are opened and closed.

이제 첨부 도면을 참조하여 본 고안을 상세히 설명하면 다음과 같다.Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

제 1 도는 종래의 전원 전압 절환회로로서, a는 릴레이를 사용한 전원 전압 절환회로이고, b는 수동스위치를 사용한 절환회로를 나타내고 있다.1 is a conventional power supply voltage switching circuit, where a is a power supply voltage switching circuit using a relay, and b is a switching circuit using a manual switch.

여기서 릴레이를 사용한 절환회로는 주지하는 바와 같이 전원전압을 이용할 때 릴레이 접점을 구동시키고 트랜스 1차측의 권선을 선택함에 따라서 릴레이(Ry)에 항상 대전류가 흐르므로 과다한 전력소모가 불가피하다.Here, the switching circuit using the relay, as it is known, excessive power consumption is inevitable because a large current always flows in the relay Ry by driving the relay contact and selecting the winding of the transformer primary side when using the power supply voltage.

또한, 절환스위치(S)를 사용하여 수동으로 조정되는 절환회로 b는 더 간단한 구성으로 되나 그 선택조정에 따른 번잡함은 주지하는 바와 같다.In addition, the switching circuit b which is manually adjusted using the switching switch S has a simpler configuration, but the complexity of the selection adjustment is well known.

제 2 도를 참조하면, 본 고안의 양호한 일실시예의 전원 전압 절환회로가 도시되어 있고, 그 구성을 설명하면, 전원선의 일단에 릴레이(Ry)의 접점(B1)과 접점(A1)이 병렬로 접속되며, 접점(A1)은 주트랜스(T1)의 100V 단자에, 또 다른 릴레이 접점(A2)은 주 트랜스(T1)의 200V 단자와 릴레이 접점(B1) 사이에 연결되어 있다.Referring to FIG. 2, there is shown a power supply voltage switching circuit of a preferred embodiment of the present invention. When the configuration thereof is described, the contact point B 1 and the contact point A 1 of the relay Ry are connected to one end of the power supply line. Connected in parallel, the contact A 1 is connected to the 100 V terminal of the main transformer T 1 , and another relay contact A 2 is connected between the 200 V terminal of the main transformer T 1 and the relay contact B 1 . It is.

전원선의 타단에는 주 트랜스(T1)의 접지단자가 접속되고, 이 접지단자와 릴레이 접점(A2) 사이에 보조 트랜스(T2)의 1차측 양단이 각각 연결된다.The other end of the power supply line is connected to the ground terminal of the main transformer T 1 , and both ends of the primary side of the auxiliary transformer T 2 are connected between the ground terminal and the relay contact A 2 , respectively.

여기서 전원선은 항상 접점(B1)을 통해 트랜스(T1)을 바이패스하여 보조 트랜스(T2)의 양단과 부하측 양단(V) (V')에 연결된다.The power line is always connected to both ends of the auxiliary transformer T 2 and both ends of the load side V (V ′) by bypassing the transformer T 1 through the contact B 1 .

또한, 보조 트랜스(T2)의 2차측 양단은 정류회로로 연결되며, 그 출력의 일단에는 병렬로 저항(R1)과 비교기(C)의 전원 Vcc단자와 저항(R4)과 릴레이(Ry) 및 다이오드(D)의 일단이 각각 연결되고 저항(R1)을 통하여 비교기(C)의 한 입력단에, 또 저항(R3)를 통하여 비교기(C)의 다른 입력단에 그리고 풀업 저항(R4)를 통해 비교기(C)의 출력단에 각기 연결된다.In addition, both ends of the secondary side of the auxiliary transformer (T 2 ) are connected to a rectifier circuit, and at one end of the output, the power supply Vcc terminal of the resistor (R 1 ) and the comparator (C), the resistor (R 4 ), and the relay (Ry). ) And one end of diode D are respectively connected and through resistor R 1 to one input of comparator C and through resistor R 3 to the other input of comparator C and pull-up resistor R 4. Are respectively connected to the output terminal of the comparator (C).

또 비교기의 한 입력단과 저항(R1) 사이에는 접지와 연결된 저항(R2)가 결합되어 있으며, 비교기의 또 다른 입력단과 접지 사이에 제너 다이오드(ZD)를 연결하여 저항(R1) (R2) (R3) (R4)과 제너다이오드(ZD)와 비교기(C)로서 비교회로부(C')를 구성하고 비교회로부(C')의 출력단에는 저항(R5)를 통해 트랜지스터의 베이스가 연결된다. 트랜지스터의 에미터는 접지되고 콜렉터는 릴레이(Ry) 및 다이오드(D)의 다른 일단과 연결되며, 콜렉터와 에미터 사이에 릴레이 접점(A3)가 접속되어 있다.In addition, a resistor (R 2 ) connected to ground is coupled between one input terminal of the comparator and a resistor (R 1 ), and a resistor (R 1 ) (R is connected by connecting a Zener diode (ZD) between another input terminal of the comparator and the ground. 2 ) The comparator circuit C 'is formed as (R 3 ) (R 4 ), the zener diode (ZD), and the comparator C, and the base of the transistor is connected to the output terminal of the comparator circuit C' through a resistor R 5 . Is connected. The emitter of the transistor is grounded, the collector is connected to the relay Ry and the other end of the diode D, and a relay contact A 3 is connected between the collector and the emitter.

상기와 같은 본 고안의 전원 전압 절환회로에 전원선을 통해 교류 100V가 인가되었을 경우, 이 전압은 릴레이(Ry)의 접점(B1)을 통하여 보조 트랜스(T2)에 가해지고, 따라서 정류회로를 거쳐 직류 전압 VD가 발생한다.When AC 100V is applied to the power supply voltage switching circuit of the present invention as described above through the power supply line, this voltage is applied to the auxiliary transformer T 2 through the contact point B 1 of the relay Ry, and thus the rectifier circuit. DC voltage V D is generated via.

이때 비교기 양단에는 각각 저항(R1) (R2)에 의한 분배 전압가 비교기의 (-)단자에, 제너다이오드의 기준전압(VZ)가 비교기의 (+)단자에 인가된다.At this time, both ends of each of the comparator resistors (R 1) distributed by the (R 2) voltage Is applied to the negative terminal of the comparator, and the reference voltage V Z of the zener diode is applied to the positive terminal of the comparator.

여기서 제너 다이오드의 전압(VZ)이보다 약간 크게 설정되었다면 비교기의 출력은 하이(Hsgh)가 되어 출력측에 전압 VD가 인가되고, 이 전압은 저항(R5)을 거쳐 트랜지스터의 베이스에 인가되어 트랜지스터가 도통한다.Where the voltage of the zener diode (V Z ) If it is set slightly larger, the output of the comparator becomes high (Hsgh), and a voltage V D is applied to the output side, and this voltage is applied to the base of the transistor via a resistor (R 5 ) to conduct the transistor.

따라서 릴레이(Ry)의 코일이 여자되어 전원측이 접점(B1)은 오프되고, A접점(A1, A2, A3)은 온된다.Therefore, the coil of the relay Ry is excited, and the contact point B 1 is turned off at the power supply side, and the A contacts A 1 , A 2 , and A 3 are turned on.

접점(A1) (A2)이 온되면 전원전압 100V는 트랜스(T1)의 승압작용에 의해 보조 트랜스(T2)로 220V가 인가되고, 정류기 전압 VD는 2.2배가 된다.When the contact point (A 1) (A 2) is on the power supply voltage is 100V, and 220V is applied to the secondary transformer (T 2) by the action of the step-up transformer (T 1), the rectifier voltage V D is doubled 2.2.

또, {R2/(R1+R2)}·VD의 값도 2.2배가 된다. 그런데 제너 다이오드(ZD)의 전압 VZ은 일정하므로 {R2/(R1+R2)}·VD＞VZ으로 되고 비교기(C)의 출력은 로우(LOW) 상태로 0V가 된다.The value of {R 2 / (R 1 + R 2 )} · V D is also 2.2 times. However, since the voltage V Z of the zener diode Z D is constant, it becomes {R 2 / (R 1 + R 2 )} · V D > V Z and the output of the comparator C becomes 0V in a low state. .

따라서 비교기(C)에 연결된 트랜지스터가 OFF된다.Therefore, the transistor connected to the comparator C is turned off.

그러나 릴레이회로는 이러한 오프상태에도 불구하고 릴레이접점(A3)에 의해 계속 여자상태로 남아 있어 단자(V) (V') 양단의 부하측에는 220V가 계속 인가된다.However, the relay circuit remains excited by the relay contact A 3 despite this off state, so 220V is continuously applied to the load side of the terminals V and V '.

다시, 전원선에 220V의 교류전원전압이 인가되면, 직류전압 VD가 100V의 경우보다 2.2배가 되고, 따라서 전술한 과정을 거쳐 비교기(C)의 출력측은 0V가 되고 이에 연결된 트랜지스터가 도통되지 못하여 역시 릴레이(Ry)를 구동시킬 수 없다.When an AC power supply voltage of 220V is applied to the power supply line again, the DC voltage V D becomes 2.2 times higher than that of 100V. Therefore, the output side of the comparator C becomes 0V through the above-described process, and the transistor connected thereto is not conducting. Again, relay Ry cannot be driven.

즉, 220V의 전원전압이 그대로 부하측에 인가된다.That is, a power supply voltage of 220 V is applied to the load side as it is.

결국 전원선에 100V 또는 220V의 전원전압이 인가되더라도 부하측에는 항상 220V가 공급된다.After all, even if a power supply voltage of 100V or 220V is applied to the power line, 220V is always supplied to the load side.

여기서 미설명부호 D는 릴레이 보호용 다이오드이다.Here, reference numeral D denotes a diode for relay protection.

상술한 바와 같이 본 고안의 전원 전압 절환회로는 비교적 간단한 구성으로 비교기 회로의 동작을 이용한 릴레이 접점의 제어로 큰 소비전력을 요하지 않고서도 릴레이를 구동시켜 전원전압이 100V인 경우 승압트랜스를 거쳐 220V로 공급하고, 220V인 경우는 직접 부하측으로 인가되어 전원전압의 선택에 관계없이 부하측에는 항상 220V를 일정하게 공급할 수 있게 되어 좀 더 높은 전압을 요하는 전기기기의 제작 및 사용에 있어 우수한 실용상의 효과를 지닌다.As described above, the power supply voltage switching circuit of the present invention has a relatively simple configuration and controls the relay contact using the operation of the comparator circuit to drive the relay without requiring a large power consumption. In case of 220V, it is directly applied to the load side, so 220V can be supplied to the load side at all times regardless of the power supply voltage selection. Therefore, it has excellent practical effect in the manufacture and use of electric equipment requiring higher voltage. Have

Claims (1)

전원 일단과 연결된 릴레이접점(A1)을 일차측 권선과 연결하는 주트랜스(T1)와 일차측권선 양단에 출력단자(V) (V')가 연결된 보조트랜스(T2)를 릴레이접점(A2)으로 개폐시키고, 전원일단과 부하단자(V)는 릴레이접점(B1)으로 제어하며 보조트랜스(T2) 이차측권선은 정류기를 통하여 저항(R1) (R2) (R3) (R4), 제너다이오드(ZD), 비교기(C)로 구성된 비교회로부(C')에 인가하고, 그 출력은 스위칭용 트랜지스터의 출력양단에 릴레이접점(A3)을 연결하여 비교기(C)의 출력에 따라서 A접점(A1)(A2)+666644(A3)을 개폐하므로서 부하측에 항상 정전압을 제공함을 특징으로 하는 전원 전압 절환회로.The main contact (T 1 ) connecting the relay contact (A 1 ) connected to one end of the power supply with the primary winding and the auxiliary transformer (T 2 ) connected with the output terminal (V) (V ') at both ends of the primary winding are connected to the relay contact ( A 2 ) open and close, power supply end and load terminal (V) are controlled by relay contact (B 1 ) and auxiliary transformer (T 2 ) secondary winding is resistor (R 1 ) (R 2 ) (R 3 ) through rectifier ) (R 4 ), zener diode (Z D ), and comparator (C) consisting of a comparator circuit (C '), the output of which is connected to a relay contact (A 3 ) across the output of the switching transistor to the comparator ( A power supply voltage switching circuit characterized in that a constant voltage is always provided to a load side by opening and closing the contact A (A 1 ) (A 2 ) +666644 (A 3 ) according to the output of C).
KR2019840009062U 1984-09-15 1984-09-15 Power circuit KR870001301Y1 (en)

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KR2019840009062U KR870001301Y1 (en) 1984-09-15 1984-09-15 Power circuit

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Application Number Priority Date Filing Date Title
KR2019840009062U KR870001301Y1 (en) 1984-09-15 1984-09-15 Power circuit

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KR860004150U KR860004150U (en) 1986-04-25
KR870001301Y1 true KR870001301Y1 (en) 1987-03-31

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