KR910001074Y1 - Power supply with s.m.p.s. - Google Patents

Power supply with s.m.p.s. Download PDF

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Publication number
KR910001074Y1
KR910001074Y1 KR2019880013187U KR880013187U KR910001074Y1 KR 910001074 Y1 KR910001074 Y1 KR 910001074Y1 KR 2019880013187 U KR2019880013187 U KR 2019880013187U KR 880013187 U KR880013187 U KR 880013187U KR 910001074 Y1 KR910001074 Y1 KR 910001074Y1
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South Korea
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voltage
switching
circuit
transformer
transistor
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KR2019880013187U
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Korean (ko)
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KR900005804U (en
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정송환
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주식회사 영원통신
도홍식
정송환
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Priority to KR2019880013187U priority Critical patent/KR910001074Y1/en
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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
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
    • H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
    • H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/145—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means
    • 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
    • G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is dc
    • 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
    • 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
    • H02M1/00—Details of apparatus for conversion
    • H02M1/0003—Details of control, feedback or regulation circuits

Abstract

내용 없음.No content.

Description

전압검출에 의한 전류증폭겸 펄스제어방식 스위칭 전원장치Current amplification and pulse controlled switching power supply by voltage detection

제1도는 본 고안의 전압검출에 의한 전류증폭겸 펄스 제어 스위칭 전원장치1 is a current amplification and pulse control switching power supply by the voltage detection of the present invention

본 고안은 교류입력전원으로부터 일정하고 안정된 직류출력을 얻을 수 있는 일종의 플라이백식 펄스제어스위칭 전원장치에 관한 것으로 특히 출력전압 검출에 의한 전류증폭겸 펄스제어 방식 스위칭 전원장치에 관한 것이다.The present invention relates to a kind of flyback type pulse control switching power supply that can obtain a constant and stable DC output from an AC input power supply, and more particularly, to an electric current amplification and pulse control type switching power supply by output voltage detection.

종래의 플라이백식 펄스제어스위칭 전원장치에서는 일반적으로 기준전압이상의 출력전압이 출력전압 판별회로에서 검출될 때 광결합기를 통하여 트랜스의 1차측의 스위칭 모드 펄스제어회로에 검출펄스를 전달하여 스위칭 트랜지스터를 온오프제어하여 1차측 코일에 흐르는 전류를 제어하므로서 2차측에 유기되는 전압을 정류회로에 의해 정류된 직류전압을 부하에 제공하도록 하였다. 그러나 1차측의 입력전원 전압변동으로 인해 2차측에 유기되어 정류되는 출력전압에 변동이 생기므로 오동작의 원인이되고 또한 트랜스 2차측에 기존전압이상의 출력전압이 검출될 때 트랜스 1차측의 스위칭 소자를 온오프제어하게 되는데 그의 속도가 빠르지 못하므로 잡음에 의한 영향을 받게되므로 더우기 오동작의 원인이 된다.In a conventional flyback type pulse control switching power supply, when an output voltage of more than a reference voltage is detected by an output voltage discrimination circuit, a detection pulse is transmitted to a switching mode pulse control circuit on the primary side of a transformer through an optical coupler to turn on a switching transistor. By controlling the current flowing through the primary side coil by controlling it off, the voltage induced in the secondary side is supplied to the load with the DC voltage rectified by the rectifier circuit. However, due to the change in the input power voltage on the primary side, the output voltage induced and rectified on the secondary side causes a malfunction, and when the output voltage above the existing voltage is detected on the transformer secondary side, It is controlled on and off, but because its speed is not fast, it is affected by noise, which further causes malfunction.

따라서 본 고안의 목적을 간단한 스위칭 모드 펄스 제어회로를 구성하여 스위칭 속도를 빠르게 하는 한편 잡음전압을 최소화하여 오동작이 없도록한 출력전압검출에 의한 정류증폭겸 펄스제어방식 스위칭전원장치를 제공하는데 있다.Accordingly, an object of the present invention is to provide a rectified amplification and pulse control type switching power supply device by output voltage detection that has a simple switching mode pulse control circuit to increase switching speed while minimizing noise voltage so that there is no malfunction.

이하 첨부도면을 참조하여 본 고안의 양호한 실시예에 의한 회로를 상세히 설명하면 다음과 같다.Hereinafter, a circuit according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

도면에서 본 고안의 스위칭 전원장치는 트랜스(T1)의 2차코일측(L2)에 정류회로(1)와 출력전압판별회로(2)을 구성하고, 1차코일측(L1)에 스위칭모드 펄스제어회로(3)를 구성하고, 상기 출력전압판별회로(2)의 검출전압에 의해 스위칭모드 펄스제어회로(3)가 구동되도록 상기 출력전압 판별회로(2)와 스위칭모드 펄스제어회로(3)가 발광 소자(Pc1)과 수광소자(Pc2)로 구성된 광결합기(PC)에 의해 결합되어 있다.In the figure, the switching power supply of the present invention constitutes a rectifier circuit 1 and an output voltage discrimination circuit 2 on the secondary coil side L 2 of the transformer T 1 , and on the primary coil side L 1 . A switching mode pulse control circuit 3 is constituted, and the output voltage determination circuit 2 and the switching mode pulse control circuit are driven such that the switching mode pulse control circuit 3 is driven by the detected voltage of the output voltage discrimination circuit 2. (3) is coupled by an optical coupler PC composed of a light emitting element Pc 1 and a light receiving element Pc 2 .

여기서 정류회로(1)는 다이오드(D1)과 콘덴서(C1)로 구성되는 것으로 일반적인 단파정류회로이다.Here, the rectifier circuit 1 is composed of a diode D 1 and a capacitor C 1 and is a general short wave rectifier circuit.

출력전압 판별회로(2)는 기준전압설정용 분배저항(R1,R2), 전압검출용 제어다이오드(ZD)로 구성되는 것으로 이 역시 일반적인 회로이다. 저항(R2)는 가변저항으로서 기준전압을 설정하는 역할을 한다.The output voltage discrimination circuit 2 is composed of distribution resistors R 1 and R 2 for setting the reference voltage and control diode Z D for voltage detection, which is also a general circuit. The resistor R 2 serves to set a reference voltage as a variable resistor.

스위칭 모드 펄스 제어회로(3)은 트랜스(T1)의 1차코일(L1)에 흐르는 전류를 제어하도록 1차코일(L1)의 타단에 스위칭 트랜지스터(Tr1)의 콜렉터를 연결하고, 그의 에미터와 베이스간에 보조코일(L1a), 저항(R3), 콘덴서(C3)를 직렬로 연결하는 한편 트랜스(T1)의 1차코일(L1)의 일단과 스위칭트랜지스터(Tr1)의 베이스간에 저항(R4)을 연결하고 보조코일(L1a)양단에 직렬로 연결된 광결합기의 수광소자(Pc2)와 다이오드(D2)를 병렬로 연결하고, 다이오드(D2)양단에 ON : ON 방식의 전류증폭형 트랜스(T2)의 1차코일(N1)과 콘덴서(C2)를 직렬로 연결하고, 콘덴서(C2) 양단에 제어 트랜지스터(Tr2)의 베이스와 에미터간을 연결하고, 그의 콜렉터 에미터와 2차코일(N2)을 스위칭 트랜지스터(Tr1)의 에미터-베이스간에 연결하여 구성한다.The switching mode pulse control circuit 3 connects the collector of the switching transistor Tr 1 to the other end of the primary coil L 1 to control the current flowing in the primary coil L 1 of the transformer T 1 , An auxiliary coil (L 1a ), a resistor (R 3 ), and a capacitor (C 3 ) are connected in series between the emitter and the base thereof, while one end of the primary coil (L 1 ) of the transformer (T 1 ) and the switching transistor (Tr) are connected. 1 ) connect a resistor (R 4 ) between the base of the base and connect the light receiving element (Pc 2 ) and the diode (D 2 ) of the optical coupler connected in series across the auxiliary coil (L 1a ), diode (D 2 ) ON at both ends: Connect the primary coil (N 1 ) and condenser (C 2 ) of the current-amplifying transformer (T 2 ) of the ON type in series, and the base of the control transistor (Tr 2 ) at both ends of the condenser (C 2 ). The emitter is connected between the emitter and the emitter, and the collector emitter and the secondary coil N 2 are connected to the emitter-base of the switching transistor Tr 1 .

상술한 바와같은 회로 중 점선으로 둘러싼 부분이 본 고안의 회로이고, 나머지 회로는 일반적으로 공지된 기본회로이다.The part surrounded by the dotted line among the circuits as described above is the circuit of the present invention, and the remaining circuits are generally known basic circuits.

상술한 바와같이 구성된 본 고안의 전압검출에 의한 전류증폭겸 펄스제어방식 스위칭 전원장치의 작용효과를 설명하면 다음과 같다.Referring to the operation and effect of the current amplification and pulse control switching power supply by the voltage detection of the present invention configured as described above are as follows.

트랜스(T1)의 입력전원측이 온상태에서 스위칭 트랜지스터(Tr1)는 베이스 저항(K4)에 의한 바이어스전압이 걸리므로 온상태가 되므로 1차코일(L1) 스위칭 트랜지스터(Tr1)의 콜렉터와 에미터, 보조코일(L1a) 저항(R3) 및 콘덴서(C3)에 전류가 도통되어 1차코일(L1)과 보조코일(L1a)이 포화상태가 되면 2차코일(L2)에 유기되는 전압이 정류회로(1)에 의해 정류되어 부하에 공급된다. 이때 전압판별 회로(2)의 분배저항(R1,R2)에 의해 가변저항(R2)에 기설정된 기준전압이 걸리게되고 전압이 상승함에 따라 전압검출 제어다이오드(ZD)에 기준전압이상의 전압이 검출되면 광결합기의 발광소자(Pc1)에 의해 광펄스가 발생되게 된다. 이때 스위칭 모드 펄스 제어회로(3)의 수광소자(Pc2)는 광펄스를 수신하게 된다. 수신된 광펄스는 다이오드(D2)에 의해 +펄스정지전압만 통과되어 콘덴서(C2)에 충전되는 동시에 제어트랜지스터(Tr2)에 작동기본전압이 걸리므로 짧은 시간에 ON스위칭되면서 트랜스(T2)의 N1 대 N2의 턴비례에 의해 제어트랜지스터(Tr2)의 전류증폭이 적용되므로 저항(R4) 트랜스(T2)의 2차코일(N2) 및 트랜지스터(Tr2)의 콘덱터-에미터의 도전로가 형성되므로 스위칭트랜지스터(Tr1)의 베이스에 바이어스전압이 걸리지 않게되어 스위칭트랜지스터(Tr1)는 오프하게 된다. 상술한 바와 같이 작용의 반복연속에 의해 트랜스(T1)에 높은 주파수의 펄스를 보내게 되므로 정류기(1)에 의하여 잡음이 최소화된 안정기 정류전압을 얻을 수 있게 된다.When the input power side of the transformer T 1 is on, the switching transistor Tr 1 is turned on because the bias voltage is applied by the base resistor K 4 , and thus the switching coil T 1 of the primary coil L 1 is switched on. When the current is applied to the collector, the emitter, the auxiliary coil (L 1a ), the resistor (R 3 ), and the capacitor (C 3 ), the primary coil (L 1 ) and the auxiliary coil (L 1a ) become saturated. The voltage induced in L 2 ) is rectified by the rectifier circuit 1 and supplied to the load. At this time, the predetermined resistance voltage is applied to the variable resistor R 2 by the distribution resistors R 1 and R 2 of the voltage discriminating circuit 2, and as the voltage increases, the voltage detection control diode Z D exceeds the reference voltage. When the voltage is detected, light pulses are generated by the light emitting device Pc 1 of the optical coupler. At this time, the light receiving element Pc 2 of the switching mode pulse control circuit 3 receives the optical pulse. The received optical pulse passes only the + pulse stop voltage by the diode (D 2 ) and is charged to the capacitor (C 2 ). At the same time, the operating transistor voltage is applied to the control transistor (Tr 2 ). Since the current amplification of the control transistor Tr 2 is applied by the turn ratio of N1 to N2 of 2 ), the secondary coil N 2 of the resistor R4 transformer T 2 and the collector of transistor Tr 2 − is formed by the conductive emitter of the switching transistor is not a bias voltage to the base of (Tr 1) takes a switching transistor (Tr 1) it becomes oFF. As described above, since a pulse of high frequency is sent to the transformer T 1 by the repetitive continuous operation, the rectifier 1 can obtain a ballast rectified voltage in which noise is minimized.

상술한 바와같은 본 고안의 회로는 간단한 회로구성으로 가능하므로 부품수가 적고, 스위칭속도가 빠른 전원장치로서 잡음이 아주적고 스위칭 모드 펄스제어회로(3)에서 다이오드(D2)에 의해(-)전위를 없앤 방식이기 때문에 높은 주파수의 펄스를 연속제어할 수 있으며 제어에서 오동작을 하지 않으므로 그 실용성이 클것으로 기대된다.As described above, the circuit of the present invention is possible with a simple circuit configuration, so that the number of components is small and the switching speed is high, the noise is very small and the (-) potential is caused by the diode D 2 in the switching mode pulse control circuit 3. It is expected that its practicality will be great because it can control the pulse of high frequency continuously because it is eliminated and does not malfunction in the control.

Claims (1)

트랜스(T1)의 2차코일(L2)측에 정류회로(1)와 전압판별회로(2)를 구성하고, 1차코일(L1)측에 스위칭 트랜지스터(Tr1), 보조코일(L1a), 저항(R3,R4) 및 콘덴서(C3)를 포함하는 스위칭모드 펄스제어회로(3)를 구성하고, 상기 스위칭트랜지스터를 제어하도록 전압판별회로(2)의 검출펄스전압이 발광소자(Pc1)과 수광소자(Pc2)로 구성된 광결합기를 통하여 스위칭모드 펄스제어회로(3)에 연결되어 있는 펄스제어 스위칭전원 장치에서, 상기 스위칭 모드펄스제어회로(3)는 수광소자(Pc2)와 직렬로 다이오드(D2)를 연결하고, 다이오드(D2)양단에 전류 증폭트랜스(T2)의 1차코일(N1)과 콘덴서(C2)를 직렬로 연결하고, 콘덴서(C2)양단에 제어트랜지스터(Tr2)의 베이스와 에미터를 연결하고, 상기 스위칭트랜지스터(Tr1)의 베이스와 에미터간에 트랜스(T2)의 2차코일(N2)와 제어트랜지스터(Tr1)의 콜렉터-에미터를 연결하여줌으로써 다이오드(D2)에 의해 (-)전위를 제거하는 한편 트랜스(T2)에 의해 전류증폭을 시키도록 구성한 것이 특징인 전압검출에 의한 전류증폭겸 펄스제어방식 스위칭 전원장치.The rectifier circuit 1 and the voltage discrimination circuit 2 are formed on the secondary coil L 2 side of the transformer T 1 , and the switching transistor Tr 1 and the auxiliary coil () are provided on the primary coil L 1 side. L 1a ), a switching mode pulse control circuit 3 including resistors R 3 , R 4 , and a capacitor C 3 , and the detected pulse voltage of the voltage discriminating circuit 2 is controlled to control the switching transistor. In the pulse controlled switching power supply device connected to the switching mode pulse control circuit 3 through an optical coupler composed of a light emitting element Pc 1 and a light receiving element Pc 2 , the switching mode pulse control circuit 3 is a light receiving element. Connect the diode (D 2 ) in series with (Pc 2 ), connect the primary coil (N 1 ) of the current amplification transformer (T 2 ) and the capacitor (C 2 ) in series across the diode (D 2 ), 2 of the capacitor (C 2) transformer (T 2) between the base and the emitter of connecting the base and the emitter of the control transistor (Tr 2) at both ends, and the switching transistor (Tr 1) By giving to connect the emitter diode (D 2) by on-coil (N 2) to the collector of the control transistor (Tr 1) (-) by removing the electric potential while transformer (T 2) is configured so that the current amplification Current amplification and pulse controlled switching power supply by voltage detection.
KR2019880013187U 1988-08-11 1988-08-11 Power supply with s.m.p.s. KR910001074Y1 (en)

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KR2019880013187U KR910001074Y1 (en) 1988-08-11 1988-08-11 Power supply with s.m.p.s.

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KR2019880013187U KR910001074Y1 (en) 1988-08-11 1988-08-11 Power supply with s.m.p.s.

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KR900005804U KR900005804U (en) 1990-03-09
KR910001074Y1 true KR910001074Y1 (en) 1991-02-21

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