KR860002470Y1 - Power circuit - Google Patents
Power circuit Download PDFInfo
- Publication number
- KR860002470Y1 KR860002470Y1 KR2019840005615U KR840005615U KR860002470Y1 KR 860002470 Y1 KR860002470 Y1 KR 860002470Y1 KR 2019840005615 U KR2019840005615 U KR 2019840005615U KR 840005615 U KR840005615 U KR 840005615U KR 860002470 Y1 KR860002470 Y1 KR 860002470Y1
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- South Korea
- Prior art keywords
- voltage
- transistor
- circuit
- zener diode
- current
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Classifications
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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
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/125—Conversion of dc power input into dc power output without intermediate conversion into ac 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
- H02M3/135—Conversion of dc power input into dc power output without intermediate conversion into ac 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 using semiconductor devices only
- H02M3/137—Conversion of dc power input into dc power output without intermediate conversion into ac 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 using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Continuous-Control Power Sources That Use Transistors (AREA)
- Control Of Electrical Variables (AREA)
Abstract
내용 없음.No content.
Description
제1도는 본 고안의 회로도.1 is a circuit diagram of the present invention.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
1 : 정류회로 2 : 텔레비젼 수상기의 부하회로1: rectifier circuit 2: load circuit of television receiver
3 : 플라이백 펄스전압의 정류회로3: rectifier circuit of flyback pulse voltage
본 고안은 온도보상용 전전압 회로에 관한 것으로서 특히 전자기기에서 사용되고 그 구성이 간단하며 저렴한 온도보상용 전전압 회로에 관한 것이다.The present invention relates to a full-voltage circuit for temperature compensation, and particularly relates to a low-temperature temperature compensation full-voltage circuit that is used in electronic devices and its configuration is simple.
종래에 있어서는 텔레비젼 수상기 및 전자기기에 전원을 투입하여서 작동을 시키게 되면, 수신기 내부의 회로소자들 예를들어, 저항, 바도체, 변압기 등의 발열에 의하여 내부온도가 상승하게 되는데 이때에는 정전압 트랜지스터의 에미터 베이스 사이의 전압(VBE)은 감소하게 되고 기준전압과 제너다이오드의 제너전압이 상승하게 되므로 B+전압이 상승되어서, 텔레비젼 화면크기가 변동되고 또한 소비전력이 증가하게 되는 단점이 있었다.In the related art, when a television receiver and an electronic device are turned on to operate, the internal temperature of the circuit elements inside the receiver increases due to heat generation such as a resistor, a bar conductor, a transformer, and the like. Since the voltage V BE between the emitter base decreases and the zener voltage of the zener diode and the zener diode are increased, the B + voltage is increased, so that the TV screen size is changed and power consumption is increased.
본 고안의 목적은 이러한 종래의 문제점을 개선하여 전원이 투입된 후에 내부온도가 상승되거나 하는 등의 변화에 상관없이 B+전압을 일정하게 유지하며, 동시에 회로가 간단하여 저렴한 가격으로 구성될 수 있는 온도보상용 정전압 회로를 제공하는 것이다.The object of the present invention is to improve this conventional problem, the B + voltage is kept constant regardless of the change in internal temperature after power is turned on, and at the same time, the circuit is simple and can be configured at a low price It is to provide a constant voltage circuit for compensation.
이하 첨부된 도면을 참조하면서 본 고안을 상세히 설명하면 다음과 같다.Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.
본 고안의 회로구성은 저항(R1,R2), 트랜지스터(TR1), 콘덴서(C1) 및 제너다이오드(D1)로 구성된 정전압 회로의 트랜지스터(TR1)의 베이스에 트랜지스터(TR2)의 콜랙터를 저항(R4,R7)를 통하여 연결하고 트랜지스터(TR1)의 에미터에 트랜지스터(TR2)의 베이스를 저항(R5), 제너다이오드(D2)를 통하여 접속하며, 저항(R4,R7)의 연결점(가)에 플라이백펄스 정류회로(3)의 출력을 저항(R3)을 통하여 공급하되, 트랜지스터(TR2)의 에미터를 접지하고, 그 베이스를 저항(R6)을 통하여 접지시킨 것이다.The circuit arrangement of the present invention has a transistor TR 2 on the base of transistor TR 1 of a constant voltage circuit composed of resistors R 1 , R 2 , transistor TR 1 , capacitor C 1 , and zener diode D 1 . ) Is connected through resistors R 4 and R 7 , and the base of transistor TR 2 is connected to the emitter of transistor TR 1 through resistor R 5 and zener diode D 2 . Supply the output of the flyback pulse rectifier circuit 3 to the connection point of the resistors R 4 and R 7 through the resistor R 3 , but ground the emitter of the transistor TR 2 and ground the base. Is grounded through a resistor (R 6 ).
이와같이 구성된 본 고안의 작용효과를 설명하면 저항(R1), 저항(R2) 트랜지스터(Tr1), 제너다이오드(D1), 콘덴서(C1)로 구성된 종래 정전압 회로는 전원이 ON되면서 트랜지스터(Tr1)가 포화상태가 되어 전류가 흐르게 된다.Referring to the operation and effect of the present invention configured as described above, a conventional constant voltage circuit composed of a resistor (R 1 ), a resistor (R 2 ) transistor (Tr 1 ), a zener diode (D 1 ), a capacitor (C 1 ) is a transistor while the power is turned on. (Tr 1 ) becomes saturated and current flows.
이때에는 정류회로(1)의 정류출력이 저항(R2)을 통하여 트랜지스터(TR1) 베이스에 가해지고 또한 제너다이오드(D1)에 제너전류가 흐르도록하여 트랜지스터(TR1)는 ON되어 전원전압(B+)이 나오게 된다. 이때 B+전압은 제너다이오드(D1)의 제너전류가 적으므로 낮아져서 제너다이오드(D2)에는 미소전류가 흐르게 되므로 트랜지스터(Tr2)는 거의 OFF 상태로 되어진다.At this time, the rectifying output of the rectifying circuit 1 is applied to the base of the transistor TR 1 through the resistor R 2 and the zener current flows to the zener diode D 1 so that the transistor TR 1 is turned on and the power supply is turned on. The voltage (B + ) comes out. At this time, the voltage B + decreases because the zener current of the zener diode D 1 is small, and a small current flows in the zener diode D 2 , so that the transistor Tr 2 is almost turned off.
그러나 플라이백 펄스정류회로(3)에서 일정 전류출력이 저항(R3)(R7)을 통해 제너다이오드(D1)의 제너전류를 상승시켜 주므로 B+전압을 상승하고 트랜지스터(TR2)는 약간 전류가 흘러 연결점(가)의 전압은 약간 감소한 상태에서 다이오드(D1)의 제너전류는 일정하게 되어 B+전압은 일정하게 된다.However, since the constant current output in the flyback pulse rectifier circuit 3 increases the zener current of the zener diode D 1 through the resistor R 3 (R 7 ), the voltage B + increases and the transistor TR 2 When the current flows slightly, the voltage at the connection point (a) decreases slightly, and thus the zener current of the diode D 1 becomes constant and the voltage B + becomes constant.
그러나 시간이 지나면 회로소자에서 열이 발생하여 내부온도가 상승되어 B+전압이 상승되면 트랜지스터(Tr2)의 베이스 전압이 상승되어서 트랜지스터(Tr2)의 에미터 콜랙터 사이의 도통율이 높아지므로 연결점(가)의 전압은 감소하게 되고 제너다이오드(D1)의 제너전류도 감소하게 된다.However, the heat generated in circuit elements with time, the internal temperature is raised B + voltage is because the conduction rate of the transistor (Tr 2) be the base voltage rises of the transistor (Tr 2) of the emitter collector increases when rising The voltage at the connection point (a) is reduced and the zener current of the zener diode D 1 is also reduced.
그러므로 제너다이오드(D1)의 양단 전압은 감소되므로 B+전압은 낮아져서 일정하게 유지되어지는 것이다.Therefore, since the voltage across the zener diode D 1 is reduced, the B + voltage is lowered and kept constant.
일반적으로 제너다이오드(D1)는 정류전압 범위에서 총부하 전류의 1/hfe 만큼의 트랜지스터(TR1) 베이스 전류를 공급하는데 기준전압이 되어야 하므로 전류용량이 커져야하며, 또한 원하는 B+전압을 공급해 주어야 하므로 제너전압아 높아야 한다.In general, the Zener diode (D 1) is to be the reference voltage to supply a transistor (TR 1) The base current of 1 / as hfe of the total load current on the rectified voltage range, so, and the current capacity keojyeoya, and supply the desired B + voltage Zener voltage should be high because it should be given.
여기에서 hfe는 트랜지스터(TR1)의 전류이득을 나타내는 증폭율이다. 따라서 온도계수는 높아져 온도 상승에 의한 기준전압 변동이 크며 전류용량이 커지므로 제너전류에 의한 전압변동도 커진다.Where hfe is an amplification factor indicating the current gain of the transistor TR 1 . Therefore, the temperature coefficient increases, so that the reference voltage fluctuation due to the temperature rises is large, and the current capacity increases, so the voltage fluctuation caused by the zener current also increases.
따라서 종래의 정전압 회로는 주위온도의 상승에 따라 정전압의 유지가 어려운 것이다. 그러나 제너다이오드(D2)는 트랜지스터(TR2)의 소요전류 1/hfe만큼 공급해주면 되므로 전류용량이 적어도 되며, 제너전압도 낮아도 되므로 제너전류 및 온도변화에 의한 영향은 극히 적게 되는 것이다.Therefore, the conventional constant voltage circuit is difficult to maintain the constant voltage as the ambient temperature rises. However, since the zener diode D 2 needs to supply as much as the required current 1 / hfe of the transistor TR 2 , the current capacity is minimal, and the zener voltage may be low, so the influence of the zener current and the temperature change is extremely small.
이상에서 설명된 바와같이, 본 고안에 의하면 텔레비젼 수신기에 전원이 투입된 후에 수신기의 내부 온도가 상승하여도 B+전압을 안정되게 유지시킬 수 있으며, 동시에 그 회로가 간단하면서도 작은 용량의 소자들을 사용할 수 있어 저렴한 가격으로 생산될 수 있는 것이다.As described above, according to the present invention, after the power is supplied to the television receiver, the B + voltage can be stably maintained even if the internal temperature of the receiver rises, and at the same time, the circuit can use simple and small capacity elements. It can be produced at a low price.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019840005615U KR860002470Y1 (en) | 1984-06-15 | 1984-06-15 | Power circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019840005615U KR860002470Y1 (en) | 1984-06-15 | 1984-06-15 | Power circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR860000986U KR860000986U (en) | 1986-02-26 |
| KR860002470Y1 true KR860002470Y1 (en) | 1986-09-25 |
Family
ID=19235397
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR2019840005615U KR860002470Y1 (en) | 1984-06-15 | 1984-06-15 | Power circuit |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR860002470Y1 (en) |
-
1984
- 1984-06-15 KR KR2019840005615U patent/KR860002470Y1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| KR860000986U (en) | 1986-02-26 |
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