KR890009007Y1 - A fixed voltage device - Google Patents

A fixed voltage device Download PDF

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Publication number
KR890009007Y1
KR890009007Y1 KR2019870005060U KR870005060U KR890009007Y1 KR 890009007 Y1 KR890009007 Y1 KR 890009007Y1 KR 2019870005060 U KR2019870005060 U KR 2019870005060U KR 870005060 U KR870005060 U KR 870005060U KR 890009007 Y1 KR890009007 Y1 KR 890009007Y1
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KR
South Korea
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transistor
voltage
base
emitter
output
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KR2019870005060U
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Korean (ko)
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KR880020686U (en
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오희석
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주식회사금성사
구자학
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    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F3/00—Non-retroactive systems for regulating electric variables by using an uncontrolled element, or an uncontrolled combination of elements, such element or such combination having self-regulating properties
    • G05F3/02—Regulating voltage or current
    • G05F3/08—Regulating voltage or current wherein the variable is dc
    • G05F3/10—Regulating voltage or current wherein the variable is dc using uncontrolled devices with non-linear characteristics
    • G05F3/16—Regulating voltage or current wherein the variable is dc using uncontrolled devices with non-linear characteristics being semiconductor devices
    • G05F3/20—Regulating voltage or current wherein the variable is dc using uncontrolled devices with non-linear characteristics being semiconductor devices using diode- transistor combinations
    • G05F3/30—Regulators using the difference between the base-emitter voltages of two bipolar transistors operating at different current densities
    • 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
    • H02M7/06—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode
    • H02M7/068—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode mounted on a transformer
    • 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
    • H02M1/0045—Converters combining the concepts of switch-mode regulation and linear regulation, e.g. linear pre-regulator to switching converter, linear and switching converter in parallel, same converter or same transistor operating either in linear or switching mode

Abstract

내용 없음.No content.

Description

정전압 전원장치Constant voltage power supply

제1도는 본 고안의 회로도.1 is a circuit diagram of the present invention.

본 고안은 정전압 전원 장치에 관한 것으로서 특히 고충실도(Hi-Fi)음향기기에 적함토록한 정전압 전원 장치 구성에 관한 것이다.The present invention relates to a constant voltage power supply device, and more particularly, to the configuration of a constant voltage power supply device suitable for high fidelity (Hi-Fi) sound equipment.

종래의 정전압 전원 장치는 제너다이오드 또는 간단한 트랜지스터회로로 구성된 것으로서 리플전류의 발생이 많고 부하 전류의 증가시 제너다이오드나 트랜지스터의 파손우려가 있을뿐 아니라 출력단락시 보호회로가 없으므로 직접회로를 비롯한 고가의 회로소자가 파손되어 고충실도 음향기기에는 부적합하였던 문제점이 있었다.The conventional constant voltage power supply is composed of a zener diode or a simple transistor circuit, which generates a lot of ripple current, may cause damage to the zener diode or transistor when the load current increases, and there is no protection circuit in the case of an output short. There was a problem that the circuit device was damaged and was unsuitable for high fidelity sound equipment.

본 고안은 이와같은 점을 감안하여 입력전압의 변동이나 부하전류의 증가시 궤환 제어회로의 작용에 의해 출력변동을 방지하여 항상 일정한 직류전압을 공급토록 함은 물론 리플젼류를 감소시켜 양질의 직류를 부하에 공급해주므로서 충실도 음향기기의 전원회로에 적합토록하고 또한 출력 단락시에는 보호회로에 의해 부하측에 과전류가 흐르는 것을 방지하여 회로소자의 파손을 미연에 방지할 수 있게한 정전압 전원장치를 제공하는데 본 고안의 목적이 있는 것으로 이하 첨부된 도면을 참조하여 본 고안의 구성 및 작용효과를 상세히 설명하면 다음과 같다.In consideration of this, the present invention prevents output fluctuations by the feedback control circuit when the input voltage fluctuates or the load current increases, so that a constant DC voltage is always supplied, as well as reducing the ripple current, so that By supplying to the load, it is suitable for the power circuit of fidelity sound equipment, and in case of output short-circuit, the protection circuit prevents overcurrent from flowing to the load side, thereby providing a constant voltage power supply device capable of preventing damage to circuit elements. The purpose and purpose of the present invention are described in detail below with reference to the accompanying drawings.

먼저 본 고안의 구성은 제1도에 도시된바와 같이, 정류회로(가)출력은 다링톤 접속된 트랜지스터(Q1,Q2)의 콜렉터에 공통 접속함과 동시에 저항(R1,R2)을 통해 트랜지스터(Q1)베이스에 연결하고, 트랜지스터(Q2)의 에미터는 에미터-베이스간에 저항(R3)이 연결된 트랜지스터(Q3)의 베이스에 연결하되, 트랜지스터(Q3)의 콜랙터는 트랜지스터(Q1)의 베이스에 연결함과 동시에 다링톤 접속된 트랜지스터(Q4,Q5)의 콜랙터에 공통 접속하며, 트랜지스터(Q4)의 에미터는 제너다이오드(D1)를 통해 접지함과 동시에 저항(R4)을 통해 트랜지스터(Q3)의 에미터에 연결하고, 트랜지스터(Q5)의 베이스는 출력전압의 변동검출을 위한 분압용 가변저항(R6) 가동단자에 연결하여된 것이다.First, as shown in FIG. 1, the structure of the present invention is the rectifier circuit (A) output is connected to the collector of the transistors Q 1 and Q 2 connected to the Darlington and at the same time, the resistors R 1 and R 2 . through transistor (Q 1) connected to the base and emitter of the emitter of the transistor (Q 2) -, but between the base resistor (R 3) is connected to the base of the associated transistor (Q 3), kolraek of the transistor (Q 3) Is connected to the base of transistor Q 1 and is connected to the collector of Darlington connected transistors Q 4 and Q 5 at the same time, and the emitter of transistor Q 4 is grounded through zener diode D 1 . At the same time, it is connected to the emitter of the transistor Q 3 through the resistor R 4 , and the base of the transistor Q 5 is connected to the movable terminal for the variable voltage variable resistor R 6 for detecting the variation of the output voltage. It is.

미설명부호 ACV는 상용교류전원 T1은 트랜스 Do는 브릿지다이오드 C1,C2,C3는 콘덴서 R5는 저항, Vi는 입력전압 Vo는 출력전압이다.Unmarked ACV is a commercial AC power supply T 1 is a transformer Do is a bridge diode C 1 , C 2 , C 3 is a capacitor R 5 is a resistor, Vi is an input voltage Vo is an output voltage.

본 고안의 작용효과는 별침도에 도시된 바와 같이 상용교류 전원(ACV)은 트랜스(T1)로 변압되고 브릿지다이오드(Do)로 경류되어 직류전압이 입력(Vi)로 된다.The working effect of the present invention is a commercial AC power supply (ACV) is transformed into a transformer (T 1 ), as shown in the star needle diagram, and flows through the bridge diode (Do) is a direct current voltage (Vi).

따라서 이 입력전압(Vi)은 본 고안 회로의 정전압 작용에 의해 항상 일정한 출력전압(Vo)으로서 회로에 공급되는데 이 정전압 작용을 좀더 상세히 설명하면 다음과 같다.Therefore, the input voltage Vi is always supplied to the circuit as a constant output voltage Vo by the constant voltage action of the present invention. The constant voltage action is described in more detail as follows.

먼저 부하 변동에 의해서 출력전압(Vo)이 저하된다면 저항(R5,R6)으로 분압되는 A점의 전압이 저하되는데 트랜지스터 (Q4)의 에미터 전압은 제너다이오드(D1)에 의하여 일정하게 유지되므로 결국 트랜지스터(Q4,Q5)의 베이스-에미터간의 전압이 저하된다.First, if the output voltage Vo decreases due to load variation, the voltage at the point A divided by the resistors R 5 and R 6 decreases, and the emitter voltage of the transistor Q 4 is constant by the zener diode D 1 . As a result, the voltage between the base and the emitters of the transistors Q 4 and Q 5 decreases.

따라서 트랜지스터(Q4,Q5)의 콜렉터 전류가 감소하게 되므로 B점의 전압이 상스하게 되어 트랜지스터(Q1)의 베이스 전압이 상승되므로 결국 트랜지스터(Q1,Q2)의 베이스-에미터간 전압이 상승된다.Therefore, transistor (Q 4, Q 5) the base of so that the collector current decreases, B is the voltage at the point to sangseu transistor (Q 1) after all the transistors (Q 1, Q 2), because the base voltage is increased in the-emitter voltage Is raised.

그러므로 트랜지스터(Q1,Q2)의 콜렉터-에미터간을 흐르는 전류가 증가하게 되어 부하에 큰 전류를 공급해 주므로 충력전압(Vo)을 상승시켜 주게 되는 것이다.Therefore, the current flowing between the collector-emitter of the transistors Q 1 and Q 2 increases, thereby supplying a large current to the load, thereby increasing the charging voltage Vo.

즉 부하 변동에 의해 출력전압(Vo)이 저하되려고 해도 저하되지 않고 일정하게 유지되게 되는 것이다.In other words, even if the output voltage Vo is to be lowered due to the load variation, the voltage is kept constant without being lowered.

그리고 입력전압(Vi)이 커지는 경우에는 저항(R1,R2)을 통해 트랜지스터(Q1)에 베이스에 인가되는 (B점 전압)이 커지게 되므로 트랜지스터(Q1,Q2)의 베이스-에미터간 전압이 상승되어 트랜지스터(Q1,Q2)의 콜렉터-에미터간을 흐르는 전류는 증가하게 된다When the input voltage Vi is increased, the (B point voltage) applied to the base of the transistor Q 1 through the resistors R 1 and R 2 increases, so that the base of the transistors Q 1 and Q 2 is increased. The voltage between the emitters increases to increase the current flowing between the collector-emitters of the transistors Q 1 and Q 2 .

이 전류의 증가에 의해 저항(R5,R6)으로 분압된 A점의 전압이 높아지게 되고 따라서 트랜지스터(Q4,Q5)의 베이스-에미터간 전압이 상승되어 그 콜랙터 전류는 증가하게 된다.The increase in the current causes the voltage at the point A divided by the resistors R 5 and R 6 to increase, thus increasing the base-emitter voltage of the transistors Q 4 and Q 5 to increase the collector current. .

그러므로 이때에는 B점의 전압이 낮아지게 되어 트랜지스터(Q1,Q2)의 베이스-에미터간 전압이 낮아지게 되고 따라서 트랜지스터(Q2)를 흐르는 콜렉터 전류가 감소되어 출력전압(Vo)이 상승이 방지되므로 일정한 전압레벨을 유지시켜 주게 되는 것이다.Therefore, at this time, the voltage at the point B is lowered, thereby lowering the base-emitter voltage of the transistors Q 1 and Q 2. Therefore, the collector current flowing through the transistor Q 2 is decreased, thereby increasing the output voltage Vo. It is prevented to maintain a constant voltage level.

그리고 부하 임피던스가 작아지거나 단락시에는 출력전류(트랜지스터)(Q2)의 콜랙터(전류)가 급격히 증가하게 되므로 이때 저항(R3)양단의 전압 강하가 커지게 된다.When the load impedance decreases or short-circuits, the collector (current) of the output current (transistor) Q 2 increases rapidly, so that the voltage drop across the resistor R 3 increases.

이 전압강하가 트랜지스터(Q3)의 베이스- 에미터간에 인가되므로 저항(R3)양단의 전압이 소정전압(0.6볼트)이상이 되면 트랜지스터(Q3)가 온되어 과출력전류는 트랜지스터(Q2)보다 트랜지스터(Q3)로 더 많이 흐르게 되므로 B점의 전압이 낮아진다. 이와같이 B점 전압이 낮아지면 상기한 바와 같이 출력전압(Vo)이 저하되고 출력전류가 감소하게 되어 결국 회로소자의 파손을 방지할 수 있게 되는 것이다.Since the voltage drop is applied between the base and the emitter of the transistor Q 3 , when the voltage across the resistor R 3 exceeds the predetermined voltage (0.6 volts), the transistor Q 3 is turned on and the over output current is the transistor Q 3 . The voltage at point B is lowered because more flows into transistor Q 3 than from 2 ). As such, when the point B voltage is lowered, the output voltage Vo is lowered and the output current is reduced as described above, thereby preventing damage to the circuit device.

이와같이 본 고안에 의하면 정전압 전원장치의 입.출력 전압변동에 대해서 안정된 정전압 작용을 수행함은 물론 단락사고 발생시 회로소자의 보호가 가능하고 리플 전류도 작아지게 되므로 고 충실도 음향기기등에 적합한 전원 장치를 제공할 수 있게 된 것이다.Thus, according to the present invention, it is possible to provide a power supply device suitable for high fidelity sound equipment, as well as performing stable constant voltage action against input / output voltage fluctuations of the constant voltage power supply device, as well as protecting circuit elements in the event of a short circuit and reducing ripple current. It is possible.

Claims (1)

정류회로(가)출력은 다링톤 접속된 트랜지스터(Q1,Q2)의 콜렉터에 공통 접속함과 동시에 저항(R1,R2)을 통해 트랜지스터(Q1)베이스에 연결하고, 트랜지스터(Q2)의 에미터는 에미터-베이스간에 저항(R3)이 연결된 트랜지스터(Q3)의 베이스에 연결하되, 트랜지스터(Q3)의 콜랙터는 트랜지스터(Q1)의 베이스에 연결함과 동시에 다링톤 접속된 트랜지스터(Q4,Q5)의 콜랙터에 공통 접속하며, 트랜지스터(Q4)의 에미터는 제너다이오드(D1)를 통해 접지함과 동시에 저항(R4)을 통해 트랜지스터(Q3)의 에미터에 연결하고, 트랜지스터(Q5)의 베이스는 출력전압의 변동 검출을 위한 분압용 가변저항(R6)가동단자에 연결하여된 정전압 전원장치.The rectifier circuit (A) output is connected to the transistor (Q 1 ) base through the resistors (R 1 , R 2 ) at the same time as the common connection to the collector of the transistor (Q 1 , Q 2 ) connected Darlington, and the transistor (Q) The emitter of 2 ) is connected to the base of transistor Q 3 with resistor R 3 connected between the emitter and base, while the collector of transistor Q 3 is connected to the base of transistor Q 1 and at the same time Darlington Commonly connected to the collectors of connected transistors Q 4 and Q 5 , the emitter of transistor Q 4 is grounded through zener diode D 1 and at the same time transistor Q 3 through resistor R 4 . And a base of the transistor (Q 5 ) connected to a voltage dividing variable resistor (R 6 ) movable terminal for detecting a change in output voltage.
KR2019870005060U 1987-04-10 1987-04-10 A fixed voltage device KR890009007Y1 (en)

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KR2019870005060U KR890009007Y1 (en) 1987-04-10 1987-04-10 A fixed voltage device

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KR2019870005060U KR890009007Y1 (en) 1987-04-10 1987-04-10 A fixed voltage device

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KR880020686U KR880020686U (en) 1988-11-30
KR890009007Y1 true KR890009007Y1 (en) 1989-12-12

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