KR950007192Y1 - Error prevention circuit for voltage regulator using thermister - Google Patents
Error prevention circuit for voltage regulator using thermister Download PDFInfo
- Publication number
- KR950007192Y1 KR950007192Y1 KR92014116U KR920014116U KR950007192Y1 KR 950007192 Y1 KR950007192 Y1 KR 950007192Y1 KR 92014116 U KR92014116 U KR 92014116U KR 920014116 U KR920014116 U KR 920014116U KR 950007192 Y1 KR950007192 Y1 KR 950007192Y1
- Authority
- KR
- South Korea
- Prior art keywords
- voltage
- thermistor
- circuit
- voltage stabilizer
- resistor
- Prior art date
Links
Classifications
-
- 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
- H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
- H02P9/10—Control effected upon generator excitation circuit to reduce harmful effects of overloads or transients, e.g. sudden application of load, sudden removal of load, sudden change of load
- H02P9/105—Control effected upon generator excitation circuit to reduce harmful effects of overloads or transients, e.g. sudden application of load, sudden removal of load, sudden change of load for increasing the stability
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Eletrric Generators (AREA)
Abstract
내용 없음.No content.
Description
제1도는 본 고안의 1실시예에 따른 오동작 방지회로의 내부구성을 나타낸 회로도.1 is a circuit diagram showing an internal configuration of a malfunction prevention circuit according to an embodiment of the present invention.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
10 : 전압안정기의 구동단 20 : 출력단10: drive stage of voltage stabilizer 20: output stage
T : 서미스터 R1-R6 : 저항T: Thermistor R1-R6: Resistance
C : 콘덴서 ZD : 제너다이오드C: Capacitor ZD: Zener Diode
Q1-Q4 : 트랜지스터 D : 다이오드Q1-Q4: Transistor D: Diode
본고안은 자동차 발전기용 전압안정기에 관한 것으로, 자동차 엔진의 고온 동작시 발전 전압이 높아지므로써 과충전 현상이 발생하는 오동작을 제거하기 위한 서미스터를 이용한 자동차 발전기용 전압안정기의 오동작 방지회로이다.The present invention relates to a voltage stabilizer for an automobile generator, and is a malfunction prevention circuit of an automobile generator voltage stabilizer using a thermistor for eliminating a malfunction in which an overcharge phenomenon occurs due to a high power generation voltage during a high temperature operation of an automobile engine.
전압안정기의 회로설계시 상온상태의 동작 특성만 고려하여 설계되어 있고, 또한 엔진과 근접하게 위치해 있는 전압안정기에 미도시된 발전기로부터 출력되는 전압은 저항(R1)과 저항(R4)에서 분압된 후 저항(R2)와 콘덴서(C1)로 구성된 로우패스 필터를 거쳐 출력되고, 상기 로우패스 필터로 부터 출력된 전압이 기준전압보다 크게 되면 제너다이오우드(ZD)는 제너 블레이크 다운(Zener break down)현상의 발생으로 순간적인 도통 상태가 되고 드라이빙용 트랜지스터(Q1)(Q2)도 또한 도통된다.When designing the circuit of the voltage stabilizer, it is designed considering only the operating characteristics of the room temperature, and the voltage output from the generator not shown in the voltage stabilizer located close to the engine is divided in the resistors R1 and R4. When the voltage output from the low pass filter composed of the resistor R2 and the condenser C1 is greater than the reference voltage, the zener diode ZD generates a Zener break down phenomenon. The occurrence causes an instantaneous conduction state, and the driving transistors Q1 and Q2 also conduct.
따라서 미도시된 발전기로부터 출력되는 오버플로우(overflow)전력이 저항(R4)를 통해 접지로 흘러 발전기의 출력을 단속하므로써 점 A의 전압은 그라운드(GND)를 기준으로 0.7볼트가 인가되며, 발전전압출력부(20)의 달링톤 접속된 파워 트랜지스터(Q3)(Q4)는 턴 오프상태가 되고, 또한 발전기의 출력이 새츄레이션(Saturation)상태가 되면 제너다이오우드(ZD)에서 기설정된 기준전압 이하로 되므로 상기 제너다이오우드 (ZD)는 오프상태가 되고, 드라이브용 트랜지스터(Q1)(Q2)는 턴 오프 (turn off)가 되며 점 A를 통해 출력되는 바이어스 전압은 달링톤 접속된 파워용 트랜지스터(Q4)(Q5)를 구동(turn on)하므로써 발전기의 출력을 상승 시키게 된다.Therefore, since the overflow power output from the generator (not shown) flows to the ground through the resistor R4 and interrupts the output of the generator, the voltage of the point A is applied to the ground (GND) at 0.7 volts. The Darlington-connected power transistors Q3 and Q4 of the output unit 20 are turned off, and when the output of the generator is in a saturation state, below the preset reference voltage in the zener diode ZD. Therefore, the Zener diode ZD is turned off, the drive transistors Q1 and Q2 are turned off, and the bias voltage output through the point A is the Darlington connected power transistor Q4. By turning on (Q5), the output of the generator is raised.
그러나 실제 엔진 구동시 또는 엔진 과열시 전압안정기의 주변온도는 93℃-125℃ 가 되게 되는바, 이의 고온에서 전압안정기의 구동단(10)이 턴온 조건일때 새츄레이션 전압[VCE(sat)]은 약간 감소하게 되고, 발전전압 출력부(20)를 턴온시키기 위한 점 A에서의 전압(VA)은 온도가 1 증가하는데 -4mV/℃ 정도로 급격히 감소하며 전압안정기구동단(10)의 드라이빙용 트랜지스터(Q1)(Q2)와 발전전압 출력부(20)의 파워용 트랜지스터(Q3)(Q4) 모두 턴온되는 현상이 발생하게 됨으로써 계속적인 발전이 일어나게 된다.However, when the engine is operating or the engine is overheated, the ambient temperature of the voltage stabilizer becomes 93 ° C-125 ° C. At this high temperature, the saturation voltage [V CE (sat)] when the driving stage 10 of the voltage stabilizer is turned on. Is slightly decreased, and the voltage V A at the point A for turning on the power generation voltage output unit 20 decreases rapidly by about -4 mV / ° C. when the temperature increases by 1, and for driving the voltage stabilization mechanism 10. As a result of turning on both the transistors Q1 and Q2 and the power transistors Q3 and Q4 of the power generation voltage output unit 20, continuous power generation occurs.
이러한 까닭으로 오동작시 발전과다로 인해 전압조정기 뿐아니라 밧데리 등의 기타 전기부품들이 파손되는 문제점이 있어왔다.For this reason, there has been a problem that not only the voltage regulator but also other electric parts such as batteries are damaged due to excessive power generation during malfunction.
이에 본 고안은 전압조정기의 구동단(10)과 발전전압 출력단(20)사이에 NTC 서미스터를 접속하므로써 고온시 모든 트랜지스터가 턴온되는 것을 방지할 수 있도록 된 전압안정기 오동작방지회로를 제공함에 그 목적이 있다.Accordingly, the present invention provides a voltage stabilizer malfunction prevention circuit that prevents all transistors from turning on at high temperature by connecting an NTC thermistor between the drive terminal 10 and the power generation voltage output terminal 20 of the voltage regulator. have.
상기한 목적을 달성하기 위한 본 고안의 구성을 첨부한 도면에 의거하여 상세히 설명하면 다음과 같다.When described in detail on the basis of the accompanying drawings the configuration of the subject innovation for achieving the above object is as follows.
상기 목적을 실현하기 위한 본 고안에 따른 전압안정기 오동작 방지회로는 미도시된 발전기에 분압저항(R1),(R4)가 연결되며 저항(R2)과 콘덴서(C1)로 구성된 로우패스 필터를 거쳐 저항(R3), 제너다이오우드(ZD), 저항(R6)을 통해 달링톤 회로로 접속된 드아리빙용 트랜지스터(Q1)(Q2)의 베이스에 연결된 전압안정기의 구동단(10)과, 상기 미도시된 발전기에 병렬로 연결되는 발전기의 출력단(F+,F-)에 다이오우드(D)와 파워 트랜지스터(Q3),(Q4)로 구성된 다알링톤 회로가 병렬로 연결되어 구성된 발전전압 출력부(20), 및 트랜지스터(Q2)의 콜렉터와 트랜지스터(Q3)의 베이스 사이 A점에 일측이 접지된 NTC 서미스터(T)를 연결하여서 구성한 것이다.The voltage stabilizer malfunction prevention circuit according to the present invention for realizing the above object is connected to a voltage divider (R1), (R4) is connected to the generator not shown through a low pass filter consisting of a resistor (R2) and a capacitor (C1) (R3), Zener diode (ZD), the driving stage 10 of the voltage stabilizer connected to the base of the deriving transistor (Q1) (Q2) connected to the Darlington circuit through the resistor (R6), and not shown A generation voltage output unit 20 having a multi-arlington circuit composed of diodes D, power transistors Q3, and Q4 connected in parallel to the output terminals F + and F- of the generator connected in parallel to the generator, and The NTC thermistor T having one side grounded is connected to the point A between the collector of transistor Q2 and the base of transistor Q3.
이와 같이 구성된 본 고안에 따른 전압안정기 오동작 방지회로의 작용효과는 다음과 같다.The operational effects of the voltage stabilizer malfunction prevention circuit according to the present invention configured as described above are as follows.
미도시된 발전기의 출력은 전압안정기 구동단(10)의 제너다이오우드 0에 인가되게 되는데, 이 제너다이오우드(ZD)는 파워용 트랜지스터(Q3)(Q4)를 스위칭 시켜주는 역활을 하게 되는 바, 달링톤 회로로 구성되어 DC전류 이득을 증폭시키는 드라이빙용 트랜지스터(Q1)(Q2)를 턴온시키게 된다.The output of the generator (not shown) is applied to the zener diode 0 of the voltage stabilizer driving stage 10. The zener diode ZD serves to switch the power transistors Q3 and Q4. The driving circuit Q1 and Q2, which are configured as a tone circuit and amplify the DC current gain, are turned on.
이때 온도상승에 따라 부하 저항값이 감소하는 NTC서미스터(T)를 통해 일류 전류를 흘러주므로써 확실히 발전전압 출력단(20)의 파워트랜지스터(Q3)(Q4)를 턴 오프시켜 과충전 현상을 제거하는 작용을 하여 주는 것 이 다.At this time, the first current flows through the NTC thermistor (T) in which the load resistance decreases as the temperature rises, thereby turning off the power transistors (Q3) and (Q4) of the power generation voltage output stage 20 to eliminate the overcharge phenomenon. To give.
이상에서 살펴본 바와 같이 본 고안은 종래의 단점이었던 자동차 엔진 구동시 온도에 의한 전압안정기의 불안정한 동작 때문에 발전기의 과충전되는 현상을 방지하여 발전기의 출력이 일정하게 출력되도록 하므로써 주변 부품의 손상을 막고 기기의 신뢰도를 증진시킬 수 있는 효과를 발휘토록 된 것이다.As described above, the present invention prevents the overcharge of the generator due to the unstable operation of the voltage stabilizer due to the temperature when driving the automobile engine, which is a disadvantage of the conventional art, so that the output of the generator is constantly output, thereby preventing damage to peripheral components and The effect is to increase the reliability.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR92014116U KR950007192Y1 (en) | 1992-07-29 | 1992-07-29 | Error prevention circuit for voltage regulator using thermister |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR92014116U KR950007192Y1 (en) | 1992-07-29 | 1992-07-29 | Error prevention circuit for voltage regulator using thermister |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR940004042U KR940004042U (en) | 1994-02-21 |
| KR950007192Y1 true KR950007192Y1 (en) | 1995-09-02 |
Family
ID=19337574
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR92014116U KR950007192Y1 (en) | 1992-07-29 | 1992-07-29 | Error prevention circuit for voltage regulator using thermister |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR950007192Y1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100709165B1 (en) * | 2005-09-14 | 2007-04-18 | 진옥상 | Constant Current Darlington Transistor |
-
1992
- 1992-07-29 KR KR92014116U patent/KR950007192Y1/en not_active IP Right Cessation
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100709165B1 (en) * | 2005-09-14 | 2007-04-18 | 진옥상 | Constant Current Darlington Transistor |
Also Published As
| Publication number | Publication date |
|---|---|
| KR940004042U (en) | 1994-02-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0373694B1 (en) | Diagnostic circuit for units providing current control and protection against excessive heat dissipation for semiconductor power devices | |
| JPH0510522Y2 (en) | ||
| JP3265849B2 (en) | Self-extinguishing element with overheat protection device | |
| JPH0668709B2 (en) | Voltage stabilizer | |
| US5581131A (en) | Electronic distributor ignition device for internal combustion engines | |
| KR950007192Y1 (en) | Error prevention circuit for voltage regulator using thermister | |
| US6597556B1 (en) | Circuit for protection from excess temperature | |
| US5923095A (en) | Control apparatus for onboard AC generator for motor vehicle | |
| US3982163A (en) | Temperature sensitive electronic switching arrangements | |
| JP2001337729A (en) | Series regulator | |
| US5548462A (en) | Protective circuit | |
| JP3403606B2 (en) | Stabilized power supply circuit | |
| EP0408124B1 (en) | Circuit for protection against negative overvoltages across the power supply of an integrated circuit comprising a power device with related control circuit | |
| GB2253101A (en) | A static electronic flasher device, particularly for controlling the direction indicators of a motor vehicle | |
| US5210675A (en) | Circuit for protection against negative overvoltages across the power supply of an integrated circuit comprising a power device with related control circuit | |
| JP2691988B2 (en) | DC stabilization power supply non-startup countermeasure circuit | |
| JPH0331011B2 (en) | ||
| KR930000600B1 (en) | Thermal-shut-down circuit for ic protection | |
| JP2543118B2 (en) | Overheat cutoff circuit | |
| KR100264892B1 (en) | Circuit for limitting current | |
| SU573801A1 (en) | Pulsed dc voltage stabilizer | |
| US4458286A (en) | Electronic device having a high voltage breakdown protection circuit | |
| KR880002182Y1 (en) | Power circuit | |
| JPH0422571Y2 (en) | ||
| SU978129A1 (en) | Dc voltage stabilizer having current overload protection |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A201 | Request for examination | ||
| E902 | Notification of reason for refusal | ||
| E701 | Decision to grant or registration of patent right | ||
| REGI | Registration of establishment | ||
| FPAY | Annual fee payment |
Payment date: 20040903 Year of fee payment: 12 |
|
| EXPY | Expiration of term |