KR860000795Y1 - Power circuit - Google Patents

Power circuit Download PDF

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KR860000795Y1
KR860000795Y1 KR2019840003837U KR840003837U KR860000795Y1 KR 860000795 Y1 KR860000795 Y1 KR 860000795Y1 KR 2019840003837 U KR2019840003837 U KR 2019840003837U KR 840003837 U KR840003837 U KR 840003837U KR 860000795 Y1 KR860000795 Y1 KR 860000795Y1
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transformer
voltage
transistor
output
circuit
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KR2019840003837U
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KR850009417U (en
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강동황
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삼성전자주식회사
정재은
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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
    • 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
    • H02M5/40—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 with intermediate conversion into dc
    • H02M5/42—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 with intermediate conversion into dc by static converters
    • H02M5/44—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 with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac
    • H02M5/443—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 with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a thyratron or thyristor type requiring extinguishing means
    • H02M5/45—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 with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only
    • H02M5/451—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 with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only with automatic control of output voltage or frequency

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Dc-Dc Converters (AREA)

Abstract

내용 없음.No content.

Description

스위칭 모우드 전력공급장치의 출력전압 안정화회로Output Voltage Stabilization Circuit of Switching Mode Power Supply

제1도는 본 고안에 따른 전력공급장치의 구성도,1 is a configuration diagram of a power supply device according to the present invention,

제2도는 본 고안에 따른 전력공급장치의 회로도.2 is a circuit diagram of a power supply according to the present invention.

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

1 : 합산전류안정화회로부, 2 : 클램핑회로부,1: summed current stabilization circuit part, 2: clamping circuit part,

3 : 충방전회로부, T1,T2: 트랜스포머,3: charge / discharge circuit part, T 1 , T 2 : transformer,

4,5,6 : 평활회로, 7 : 구동회로부,4,5,6: smoothing circuit, 7: driving circuit section,

8 : 정류회로부, 9 : 평활회로부,8: rectifier circuit part, 9: smoothing circuit part,

a∼i : 트랜스포머(T1)의 각 단자, IC1: 레글레이터 IC,a to i: each terminal of the transformer (T1), IC 1 : a regulator IC,

TR3: 스위칭트랜지스터,TR 3 : switching transistor,

OUT1∼OUT3: 스위칭모우드 전력공급장치의 각 출력단자.OUT 1 ~OUT 3: Modal each output terminal of the switching power supply.

본 고안은 110/220V의 교류입력전원으로부터 일정하고 안정된 직류출력을 얻을 수 있는 전력공급장치에 관한 것으로써 특히 스위칭모우드 전력공급장치의 출력전압 안정화회로에 관한 것이다.The present invention relates to a power supply device capable of obtaining a constant and stable DC output from an AC input power supply of 110 / 220V, and more particularly to an output voltage stabilization circuit of a switching mode power supply.

일반적인 전력공급장치에서 이에 연결된 부하가 변동되면 전력공급장치에서 부하로 공급되던 출력전압도 변화하게 되는데, 상기부하가 정밀전압을 요구하는 정밀기기인 경우에 일정한 전압이 공급되지 않으면 오동작이 발생할 우려가 있었다.When the load connected to the general power supply is changed, the output voltage supplied from the power supply to the load is also changed. In the case of the precision device requiring the precision voltage, if a constant voltage is not supplied, a malfunction may occur. there was.

본 고안은 상기한 결점을 개선한 것으로써, 스위칭모우드 전력공급장치의 출력전압을 부하의 변동에 관계없이 거의 일정하게 유지시키기 위하여 전원트랜스의 2차측 코일에 유기된 전압과 전력공급장치의 출력단 전압을 비교하여 그 비교된 전압차로써 출력단 트랜지스터의 듀티사이클을 변화시키고, 그 변화된 신호로 전원트랜스의 1차측에 있는 스위칭 트랜지스터를 제어하여 출력전압을 일정하게 유지시킬 수 있는 스위칭모우드 전력공급장치의 출력전압안정화회로를 제공함에 목적이 있다.The present invention improves the above-mentioned shortcomings, and the voltage induced in the secondary coil of the power transformer and the output terminal voltage of the power supply in order to maintain the output voltage of the switching mode power supply almost constant regardless of load variation. The output voltage of the switching mode power supply that can change the duty cycle of the output transistor by the compared voltage difference, and control the switching transistor on the primary side of the power supply transformer with the changed signal to keep the output voltage constant. It is an object to provide a voltage stabilization circuit.

이하 본 고안의 구성 및 작용, 효과를 예시도면에 의거 상세히 설명하면 다음과 같다.Hereinafter, the configuration, operation, and effects of the present invention will be described in detail with reference to the accompanying drawings.

본 고안은 전원트랜스(T1)의 단자(e)(g)에 연결된 다이오드(D1)(D2)에 저항(R1∼R6), 가변저항(R7) 콘덴서(C1)(C2) 및 레글레이터 IC(IC1)로 구성된 합산전류 안정화회로부(1)를 연결하고, 전원트랜스(T1)의 단자(e)와 출력단자(OUT2)사이에 저항(R8)과 다이오드(D3∼D5) 및 콘덴서(C3)로 구성되는 클램핑회로부(2)를 연결하며, 전원트랜스(T1)의 단자(e)(h)에 저항(R9)(R10)과 콘덴서(C4)로 구성된 충방전회로부(3)를 연결해서 각 회로부(1)(2)(3)의 일단을 에미터가 출력단자(OUT2)에 연결되어 있는 트랜지스터(TR2)의 베이스에 연결하고 트랜지스터(TR1)의 컬렉터를 저항(R11∼R14)과 트랜스포머(T2) 및 트랜지스터(TR2)를 사용하여 스위칭트랜지스터(TR3)의 베이스에 연결시킨 구조로 되어있다.The subject innovation is a power transformer (T 1) resistance (R 1 ~R 6) to a terminal (e) (g) the diode (D 1) (D 2) connected to a variable resistance (R 7) a capacitor (C 1) ( C 2 ) and the summation current stabilization circuit part 1 composed of the regulator IC (IC 1 ), and a resistor (R 8 ) between the terminal (e) of the power supply transformer (T 1 ) and the output terminal (OUT 2 ). It connects the clamping circuit part 2 consisting of diodes D 3 to D 5 and a capacitor C 3 , and resistors R 9 (R 10 ) to terminals e (h) of the power supply transformer T 1 . And a charge / discharge circuit section 3 composed of a capacitor C 4 , and one end of each circuit section 1, 2, 3 is connected to the output terminal OUT 2 of the transistor TR 2 . It is connected to the base, and the collector of transistor TR 1 is connected to the base of switching transistor TR 3 by using resistors R 11 to R 14 , transformers T 2 and transistors TR 2 . .

미설명부호 B D는 브릿지정류회로, 4,5,6은 평활회로, 7은 구동회로부, 8은 정류회로부, 9는 평활회로부Reference numeral B D is a bridge rectifier circuit, 4, 5, 6 is a smooth circuit, 7 is a drive circuit, 8 is a rectifier circuit, 9 is a smooth circuit

제1도는 본 고안에 따른 전력공급장치의 계통도를 나타낸 것으로써, 전력공급장치의 입력단자로 입력된 상용교류입력전원(AC 110V/220V)이 정류회로부(8)와 트랜스포머(T1) 및 평활회로부(9)를 거쳐 안정된 직류로 변환된 후 출력단자(OUT)에 연결되는 부하로 공급되는데 부하의 변동으로 말미암아 출력전압이 변화하면 트랜스포머(T1)의 2차측 및 출력단자(OUT) 사이에 합산전류 안정화회로부(1)와 클램핑회로부(2) 및 충방전회로부(3)로 구성되어 연결된 비교부(10)에서 출력의 변동을 감지하여 구동회로부(7)를 동작시키고, 이에따라 구동회로부(7)는 스위칭트랜지스터(TR3)를 온-오프시켜서 트랜스포머(T1)의 1차측에서 2차측으로 유기되는 전압을 제어하므로써 상기한 전력공급장치의 출력전압을 안정시키는 것이다.Figure 1 shows a schematic diagram of the power supply device according to the present invention, the commercial AC input power (AC 110V / 220V) input to the input terminal of the power supply device rectifier circuit section 8 and transformer (T 1 ) and smoothing After being converted into stable DC through the circuit section 9, it is supplied to the load connected to the output terminal OUT. If the output voltage changes due to the change of the load, it is between the secondary side of the transformer T 1 and the output terminal OUT. Comprising a total current stabilization circuit section (1), clamping circuit section (2) and charging and discharging circuit section (3) connected to the comparator 10 detects the change in the output to operate the drive circuit section (7), accordingly drive circuit section (7) ) Stabilizes the output voltage of the power supply device by controlling the voltage induced from the primary side to the secondary side of the transformer T 1 by turning on / off the switching transistor TR 3 .

전술한 바와같이 동작하는 본 고안을 제2도에 도시한 회로도에 의하여 보다 상세히 설명하면 다음과 같다.The present invention operating as described above will be described in more detail with reference to the circuit diagram shown in FIG.

전원스위치를 온시키면 상용 교류입력전원은 브릿지 정류회로(BD) 등으로 구성된 배전압 정류회로(8)에서 정류된 후 저항(R15)(R15)(R17)(R14)과 다이오드(D7) 및 저항(R19)으로 차례로 흐르게 된다. 그러므로 스위칭트랜지스터(TR3)의 베이스에 적절한 바이어스값이 인가되어서 스위칭트랜지스터(TR3)가 턴-온되므로 브릿지 정류회로(BD)를 통과한 전류는 전원트랜스포머(T1)의 1차코일과 스위칭트랜지스터(TR3)의 컬렉터 및 에미터를 거쳐서 공통단자로 흐르게 된다. 이와같이 전원 트랜스포머(T1)의 1차코일에 전류가 흐르게 되면 2차측에도 전압이 유기되므로 2차측에 유기된 전압은 전원 트랜스포머(T1)의 각 단자(e∼i)를 통하여 출력단(OUT1-OUT3)과 비교부(10)로 흐르게 되는데 출력단(OUT1-OUT3)으로 흐르는 전류는 일반적인 평활회로(4)(5)(6)에서 충분히 평활된 후 외부로 공급된다. 한편 각기 다른 전압을 출력하는 전원트랜스(T1)의 단자(e)(g)에서 출력된 전류(맥류)는 다이오드(D1)와 저항(R2), 다이오드(D2)와 저항(R1)을 각각 통과한 후 합산된 전류는 레글레이터 IC(IC1)에서 안정된 직류로 평활된 다음 저항(R10)을 통하여 다이오드(D5)의 캐소드 및 트랜지스터(TR1)의 베이스로 인가된다. 또한 단자(e)에서 출력된 전류는 저항(R9)과 콘덴서(C4)로 이루어진 충방전회로부(3)에서 충방전을 거듭하면서 톱니파의 형태로 저항(R10)을 통하여 다이오드(D5)의 캐소드와 트랜지스터(TR1)의 베이스로 인가된다. 한편 출력단자(OUT2)에서 트랜지스터(TR1)의 에미터로 흐르는 직류는 구형파전압을 클램핑회로부(2)에서 일정레벨로 클램핑시킨 후 다이오드(D5)의 애노드에 인가시킨다. 이에따라 레글레이터 IC(IC1)에서 출력된 직류와 충방전회로부(3)에서 톱니파형태로 출력된 전압과의 합이 클램핑회로부(2)에서 출력된 구형파전압과 다이오드(D5)에서 비교된다. 즉 다이오드(D5)의 양단에 걸린 전압차에 따라 다이오드(D5)가 도통 또는 불통되기 때문에 이에따라 트랜지스터(TR1)의 듀티-싸이클이 변화된다. 이러한 듀티-싸이클의 변화는 트랜스포머(T2)의 1차코일에 흐르는 전류를 변화시키므로 트랜스포머(T2)의 2차코일에 유기되는 전압도 변화된다. 일례로써 출력단(OUT1)(OUT2)에 과부하가 걸리면 합산전류 안정화회로부(1)에 소자값에 의하여 다이오드(D5)의 캐소드전위가 다이오드(D5)의 애노드 전위보다 높도록 설정되어 있으므로 트랜지스터(TR1)가 턴-온되어서 트랜스포머(T2)의 1차측 코일에 전류가 흐르게 되고 이 전류는 트랜스포머(T2)의 2차코일에 전압을 유기시킨다. 이 전압에 의하면 트랜지스터(TR2)가 턴-온되므로 스위칭 트랜지스터(TR3)의 베이스전위는 그라운드되어서 스위칭트랜지스터(TR3)를 턴-오프시키므로써 트랜스포머(U1)의 1차코일에 흐르는 전류가 제어된다. 따라서 트랜스포머(T2)의 2차코일에 유기되는 전압도 변동되는데 이때 유기된 전압은 낮아지게 되어서 출력단(OUT1~OUT3)으로는 정격전압이 출력된다. 이와같이 본 고안은 출력단(OUT1~OUT3)에 연결된 부하의 변동으로 말미암아 출력전압이 증가되면 합산전류안정화회로부(1), 클램핑회로부(2), 충방전회로부(3) 및 구동회로부(7)로 구성된 궤환요소는 증가된 전압을 감소시키는 방향으로 동작되고 출력전압이 감소되면 궤환요소는 감소된 전압을 증가시키는 방향으로 동작되어서 출력전압을 일정하게 유지시킨다.When the power switch is turned on, the commercial AC input power is rectified by a double voltage rectifier circuit 8 including a bridge rectifier circuit (BD) and the like, and then the resistors R 15 , R 15 , R 17 , R 14 , and a diode ( D 7 ) and resistance (R 19 ) in turn. Therefore, a suitable bias value to the base of the switching transistor (TR 3) is applied be the switching transistor (TR 3) is turned on since the current through the bridge rectifier circuit (BD) is the primary coil and the switching of the power transformer (T 1) The common terminal flows through the collector and emitter of the transistor TR 3 . In this way the power transformer output stage when a current flows in the primary coil to the secondary-side voltage is because the organic voltage induced in the secondary side, through the respective terminal (e~i) of the power transformer (T 1) of the (T 1) (OUT 1 -OUT 3 ) and the comparator 10 flows to the output stage (OUT 1 -OUT 3 ) is supplied to the outside after being smoothed in the general smoothing circuit (4) (5) (6). On the other hand, the current (pulse flow) output from the terminal (e) (g) of the power transformer (T 1 ) outputting different voltages is the diode (D 1 ), the resistor (R 2 ), the diode (D 2 ), and the resistor (R). After each pass through 1 ), the summed current is smoothed to a stable direct current in the regulator IC IC 1 and then applied through the resistor R 10 to the cathode of the diode D 5 and the base of the transistor TR 1 . . In addition, the current output from the terminal (e) is charged and discharged in the charge and discharge circuit portion (3) consisting of a resistor (R 9 ) and a capacitor (C 4 ) while the diode (D 5 ) through the resistor (R 10 ) in the form of a sawtooth wave. ) Is applied to the cathode and to the base of the transistor TR 1 . On the other hand, the direct current flowing from the output terminal OUT 2 to the emitter of the transistor TR 1 clamps the square wave voltage to a predetermined level in the clamping circuit unit 2 and then applies it to the anode of the diode D 5 . Accordingly, the sum of the direct current output from the regulator IC IC 1 and the voltage output in the sawtooth wave form from the charge / discharge circuit section 3 is compared with the square wave voltage output from the clamping circuit section 2 in the diode D 5 . That is, in accordance with the voltage difference taken across the diode (D 5) is a diode (D 5) in a conductive or tweaked yiettara duty of the transistor (TR 1) - The cycle is changed. The duty-cycle is a change in the voltage change may be induced in a secondary coil of the transformer (T 2) change because the current flowing through the primary coil of the transformer (T 2). As an example, when the output terminal OUT 1 (OUT 2 ) is overloaded, the cathode potential of the diode D 5 is set higher than the anode potential of the diode D 5 by the element value in the sum current stabilization circuit unit 1. a transistor (TR 1) is turned on, be a transformer (T 2) of the current flows to the primary coil, the current causes the organic voltage in the secondary coil of the transformer (T 2). According to this voltage transistor (TR 2) is turned on since the switching transistor (TR 3) of the base electric potential turns on the switching transistor (TR 3) be a ground-current flowing through the primary coil of the writing because the off transformer (U 1) Is controlled. Therefore, the voltage induced in the secondary coil of the transformer T 2 is also changed. At this time, the induced voltage is lowered and the rated voltage is output to the output terminals OUT 1 to OUT 3 . In this way, the present invention, when the output voltage is increased due to the fluctuation of the load connected to the output terminals (OUT 1 ~ OUT 3 ), the summation current stabilization circuit unit 1, the clamping circuit unit 2, the charge-discharge circuit unit 3 and the driving circuit unit (7) The feedback element is configured to operate in the direction of decreasing the increased voltage, and when the output voltage is reduced, the feedback element is operated in the direction of increasing the reduced voltage to maintain the output voltage constant.

상기한 바와같이 본 고안은 부하의 변동으로 출력전압이 변동되면 합산전류 안정화회로부(1), 클램핑회로부(2), 충방전회로부(3) 및 구동회로부(7)로 구성되는 궤환요소에 의하여 변동된 전압만큼 보상해주므로써 부하가 변동되어도 출력전압이 항상 일정하게 유지되는 장점이 있다.As described above, when the output voltage is changed due to the change of load, the present invention is changed by the feedback element composed of the sum current stabilization circuit unit 1, the clamping circuit unit 2, the charge / discharge circuit unit 3, and the driving circuit unit 7. By compensating for the set voltage, the output voltage is always kept constant even when the load is changed.

Claims (1)

트랜스포머(T11)의 단자(e)(g)에 연결된 다이오드(D1)(D2)에 저항(R1∼R6), 가변저항(R7), 콘덴서(C1)(C2) 및 레글레이터 IC(IC1)로 구성된 합산전류 안정화회로부(1)를 연결하고, 트랜스포머(T1)의 단자(e)와 출력단자(OUT2)에 저항(R8)과 다이오드(D3∼D5) 및 콘덴서(C3)로 구성되는 클램핑회로부(2)를 연결하며, 트랜스포머(T1)의 단자(e)(h)에 저항(R9)(R10)과 콘덴서(C4)로 구성된 충방전 회로부(3)를 연결해서 각 회로부(1)(2)(3)의 일단을 에미터가 출력단자(OUT2)에 연결되어 있는 트랜지스터(TR1)의 베이스에 연결하고 트랜지스터(TR2)의 컬렉터를 저항(R11∼R14)과 트랜스포머(T2) 및 트랜지스터(TR2)를 사용하여 스위칭 트랜지스터(TR3)의 베이스에 연결시킨 스위칭모우드 전력공급장치의 출력전압 안정화회로.A resistor (R 1 to R 6 ), a variable resistor (R 7 ), a capacitor (C 1 ) (C 2 ) to a diode (D 1 ) (D 2 ) connected to the terminal (e) (g) of the transformer (T 11 ). And a summation current stabilization circuit part 1 composed of a regulator IC (IC 1 ), and a resistor R 8 and a diode D 3 to the terminal e and the output terminal OUT 2 of the transformer T 1 . D 5 ) and the clamping circuit part 2 consisting of a capacitor (C 3 ) are connected, and a resistor (R 9 ) (R 10 ) and a capacitor (C 4 ) to the terminal (e) (h) of the transformer (T 1 ). The charging and discharging circuit unit 3 is configured to connect one end of each circuit unit 1, 2, 3 to the base of the transistor TR 1 having the emitter connected to the output terminal OUT 2 and the transistor ( the collector of TR 2) resistors (R 11 ~R 14) and the transformer (T 2) and the transistor (TR 2) to the switching transistor (TR 3) output voltage regulation of the switching power supply apparatus in which modal connected to the base of the circuit using .
KR2019840003837U 1984-04-25 1984-04-25 Power circuit KR860000795Y1 (en)

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KR2019840003837U KR860000795Y1 (en) 1984-04-25 1984-04-25 Power circuit

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KR2019840003837U KR860000795Y1 (en) 1984-04-25 1984-04-25 Power circuit

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KR850009417U KR850009417U (en) 1985-12-02
KR860000795Y1 true KR860000795Y1 (en) 1986-04-30

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