CN201113886Y - Voltage regulator for automobile generator - Google Patents
Voltage regulator for automobile generator Download PDFInfo
- Publication number
- CN201113886Y CN201113886Y CNU2007201028264U CN200720102826U CN201113886Y CN 201113886 Y CN201113886 Y CN 201113886Y CN U2007201028264 U CNU2007201028264 U CN U2007201028264U CN 200720102826 U CN200720102826 U CN 200720102826U CN 201113886 Y CN201113886 Y CN 201113886Y
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- pin
- adjuster
- diode
- resistance
- stabilizing didoe
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Abstract
The utility model provides an automobile generator voltage regulator provided with reliable overcurrent protection function. The utility model mainly comprises a dual voltage comparator and a large-power dynatron, wherein, the dual voltage comparator can select an integrated circuit LM2903 or LM193; one path of comparator forms a basic regulator circuit with a power tube, and the other path of comparator forms an overcurrent protection circuit with an auxiliary circuit. The regulator has the advantages that: the regulator has a simple structure, small volume and low cost; when the output current of the regulator is overlarge due to the fault of the automobile generator, the regulator can automatically shut off, thereby ensuring that the regulator can not be damaged.
Description
Technical field
The utility model relates to the automobile current generator voltage regulator, is specifically related to a kind of automobile current generator voltage regulator with excess current protective function.
Background technology
The automobile current generator voltage regulator is the vitals that guarantees vehicle safety travel.And because the fault of generator, adjuster work output current is excessive to making, and surpasses the tolerance range of power tube, is the main cause that causes voltage regulator to damage.Therefore, the automobile dynamo governor with simple, yet reliable excess current protective function is the developing direction that adjuster will be produced from now on.Existing several automobile current generator voltage regulators with excess current protective function, when overcurrent protection was moved, it was low to exist operating frequency, and it is little to adjust the wave mode duty ratio, and impulse current is big, the problem of temperature rise, the reliability of its overcurrent protection is relatively poor.
Summary of the invention
The purpose of this utility model is at the problems referred to above, and a kind of automobile current generator voltage regulator with reliable excess current protective function is provided.
The technical scheme that realizes above-mentioned purpose is: a kind of automobile current generator voltage regulator, it includes the diode end in magnetic field, the excitation end, bonding end and have homophase input, two voltage comparator integrated circuits of reverse input and output pin, one end of its sample circuit upper offset resistance is connected with the magnetic field diode end of adjuster, the other end is connected with a homophase input pin of below-center offset resistance and integrated circuit, the other end of below-center offset resistance is connected with another homophase input pin that overcurrent protection is adjusted resistance and integrated circuit, and the other end that overcurrent protection is adjusted resistance is connected with the bonding end of adjuster; One end of reference circuit current-limiting resistance is connected with the magnetic field diode end of adjuster, the other end is connected with the negative electrode of reference circuit voltage stabilizing didoe, a reverse input pin of integrated circuit and the anode of isolating diode, the anode of reference circuit voltage stabilizing didoe is connected with the bonding end of adjuster, and the negative electrode of isolating diode is connected with an output pin of integrated circuit; One end of pull-up resistor is connected with the magnetic field diode end of adjuster, and end is connected with an output pin of integrated circuit and the base stage of prime amplifying triode in addition; One end of overvoltage protection branch road current-limiting resistance is connected with the magnetic field diode end of adjuster, the other end is connected with the negative electrode that prime is amplified branch road collector resistance and overvoltage protection voltage stabilizing didoe, the end that prime is amplified the branch road collector resistance is connected with the collector electrode of prime amplification triode and the base stage of power output pipe, the anode of overvoltage protection voltage stabilizing didoe is connected with the bonding end of adjuster, and the emitter of prime amplifying triode is connected with the bonding end of adjuster; The collector electrode of power output pipe is connected with the excitation end of adjuster and the anode of fly-wheel diode, emitter is connected with a reverse input pin of overcurrent protection sampling resistor and integrated circuit, the negative electrode of fly-wheel diode is connected with the magnetic field diode end of adjuster, and the other end of sampling resistor is connected with the bonding end of adjuster; The two ends of delay capacitor are connected to the homophase input pin and the reversed input pin of integrated circuit respectively, and three filtering capacitors are in parallel with reference circuit voltage stabilizing didoe, integrated package power supply voltage stabilizing didoe, overvoltage protection voltage stabilizing didoe respectively; One end of integrated package power supply current-limiting resistance is connected with the magnetic field diode end of adjuster, the other end is connected with the negative electrode of voltage stabilizing didoe and the positive source pin of integrated circuit, and the power cathode pin of the anode of integrated package voltage stabilizing didoe, integrated circuit is connected to the bonding end of adjuster respectively.
The operating frequency height of this automobile current generator voltage regulator when overcurrent protection is moved, adjusting wave mode duty ratio is big, and impulse current is little, and temperature rise is low, has reliable excess current protective function.Have simultaneously simple in structure, volume is little.The characteristics that cost is low.
Description of drawings
Accompanying drawing is the circuit theory diagrams of this automobile current generator voltage regulator.
Embodiment
In conjunction with the accompanying drawings embodiment of the present utility model is described.
This automobile current generator voltage regulator includes magnetic field diode end D+, excitation end F, bonding end E and has homophase input pin 3,5 and two voltage comparator integrated circuit (IC) of reverse input pin 2,6 and output pin 1,7, and its IC can select LM2903 or LM193.As accompanying drawing, one end of sample circuit upper offset resistance R 1 is connected with magnetic field diode end D+, the other end is connected with the 5th pin of below-center offset resistance R 2 and integrated circuit (IC), the other end of below-center offset resistance R 2 is connected with the 3rd pin that overcurrent protection is adjusted resistance R 3 and integrated circuit (IC), and the other end that overcurrent protection is adjusted resistance R 3 is connected with bonding end E; The end of reference circuit current-limiting resistance R4 is connected with the D+ end, the other end is connected with the negative electrode of reference circuit voltage stabilizing didoe D1, the 6th pin of IC and the anode of isolating diode D2, the anode of diode D1 is connected with the E end, and the negative electrode of diode D2 is connected with the 1st pin of IC; The end of pull-up resistor R6 is connected with the D+ of adjuster end, and the other end is connected with the base stage that prime is amplified triode V1 with the 7th pin of IC; The end of overvoltage protection branch road current-limiting resistance R7 is connected with the D+ end, the other end is connected with the negative electrode that prime is amplified branch road collector resistance R8 and overvoltage protection voltage stabilizing didoe D5, the other end of resistance R 8 is connected with the collector electrode of triode V1 and the base stage of power output pipe V2, and the emitter of the anode of diode D5, triode V1 is connected with the E end of adjuster respectively; The collector electrode of power output pipe V2 is connected with the anode of sustained diode 4 with the F of adjuster end, emitter is connected with the 2nd pin of overcurrent protection sampling resistor R9 and IC, the negative electrode of diode D4 is connected with the D+ end, and the other end of resistance R 9 is connected with the E of adjuster end; The two ends of delay capacitor C1 are connected with 5 pin, 6 pin of IC respectively, and filtering capacitor C2, C3, C4 are respectively with reference circuit voltage stabilizing didoe D1, integrated package power supply voltage stabilizing didoe D3, D5 is in parallel for the overvoltage protection diode; The end of integrated package power supply current-limiting resistance R5 is connected with the D+ of adjuster end, and the other end is connected with the negative electrode of voltage stabilizing didoe D3 and positive source 8 pin of IC, and the anode of diode D3, the power cathode of IC 4 pin are connected with the E end of adjuster respectively.
The operation principle of this adjuster such as following:
1, by the conducting and the shutoff of adjuster, control generator excitation circuit electric current makes generator output voltage remain on set point.
2, when generator voltage is increased to the regulation voltage higher limit, the current potential of IC the 5th pin is higher than the current potential of the 6th pin, and this moment, its 7th pin was high level output, triode V1 saturation conduction, power tube V2 ends, and field circuit becomes open circuit, excitation descends, and alternator voltage also descends thereupon.
3, when generator voltage is reduced to the regulation voltage lower limit, the current potential of the 5th pin of IC is lower than the current potential of 6 pin, and this moment, its 7th pin was low level output, triode V1 ends, power tube V2 saturation conduction, and energized circuit is connected, excitation increases, and alternator voltage rises to set point.
4, when exciting current is higher than the overcurrent protection set point; the 2nd pin current potential of IC is higher than the 3rd pin current potential; its the 1st pin is output as low level; make diode D2 conducting, forcing the 6th pin of IC is lower current potential, and making its 7th pin is high level output; triode V1 saturation conduction; power tube V2 ends, and energized circuit disconnects, thereby realizes the protection of overcurrent.
5, after power tube V2 ends, the 2nd pin current potential of IC is lower than the 3rd pin current potential, makes its 1st pin be output as high potential, and D2 ends, and the 6th pin of IC reverts to reference voltage value.Because of generator output voltage reduces; the 5th pin current potential of IC is lower than the 6th pin current potential; make the 7th pin be output as electronegative potential; thereby V1 is ended, and the V2 saturation conduction is connected energized circuit; if this moment, exciting current was still greater than the overcurrent protection set point; the protective circuit action makes the V1 saturation conduction rapidly, and V2 ends.Adjuster is worked so repeatedly, and makes generator be in little generating state, after the trouble shooting that causes the overcurrent protection action, and the adjuster operate as normal, generator recovers generating state.
Claims (1)
1, a kind of automobile current generator voltage regulator, include magnetic field diode end (D+), excitation end (F), bonding end (E) and have homophase input pin (3), (5) and oppositely input pin (2), (6) and output pin (1), (7) two voltage comparator integrated circuits (IC), it is characterized in that: an end of sample circuit upper offset resistance (R1) is connected with (D+) of adjuster end, the other end is connected with (5) pin of below-center offset resistance (R2) and (IC), the other end of below-center offset resistance (R2) is connected with (3) pin that overcurrent protection is adjusted resistance (R3) and (IC), and the other end that overcurrent protection is adjusted resistance (R3) is connected with (E) end of adjuster; One end of reference circuit current-limiting resistance (R4) is connected with (D+) of adjuster end, the other end is connected with the negative electrode of reference circuit voltage stabilizing didoe (D1), the 6th pin of (IC) and the anode of isolating diode (D2), the anode of diode (D1) is connected with (E) of adjuster end, and the negative electrode of diode (D2) is connected with (1) pin of (IC); One end of pull-up resistor (R6) is connected with (D+) of adjuster end, and the other end is connected with the base stage that prime is amplified triode (V1) with (7) pin of (IC); One end of overvoltage protection branch road current-limiting resistance (R7) is connected with (D+) of adjuster end, the other end is connected with the negative electrode that prime is amplified branch road collector resistance (R8) and excess voltage protection voltage stabilizing didoe (D5), the other end of resistance (R8) is connected with the collector electrode of triode (V1) and the base stage of power output pipe (V2), and the emitter of the anode of diode (D5), triode (V1) is connected with (E) end of adjuster respectively; The collector electrode of power output pipe (V2) is connected with the anode of fly-wheel diode (D4) with (F) of adjuster end, emitter is connected with (2) pin of overcurrent protection sampling resistor (R9) and (IC), the negative electrode of diode (D4) is connected with (D+) end, and the other end of resistance (R9) is connected with (E) of adjuster end; The two ends of delay capacitor (C1) are connected with (5), (6) pin of (IC) respectively, and filtering capacitor (C2), (C3), (C4) are respectively with reference circuit voltage stabilizing didoe (D1), integrated package power supply voltage stabilizing didoe (D3), (D5) is in parallel for the overvoltage protection voltage stabilizing didoe; One end of integrated package power supply current-limiting resistance (R5) is connected with (D+) of adjuster end, the other end is connected with the negative electrode of voltage stabilizing didoe (D3) and (8) pin of (IC), and (4) pin of the anode of diode (D3), (IC) is connected with (E) end of adjuster respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201028264U CN201113886Y (en) | 2007-10-17 | 2007-10-17 | Voltage regulator for automobile generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201028264U CN201113886Y (en) | 2007-10-17 | 2007-10-17 | Voltage regulator for automobile generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201113886Y true CN201113886Y (en) | 2008-09-10 |
Family
ID=39965634
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201028264U Expired - Fee Related CN201113886Y (en) | 2007-10-17 | 2007-10-17 | Voltage regulator for automobile generator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201113886Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102195265A (en) * | 2010-03-11 | 2011-09-21 | 博格华纳贝鲁系统股份有限公司 | Device and method for protecting an electrical consumer against voltage spikes in a motor vehicle |
| CN102983720A (en) * | 2012-11-30 | 2013-03-20 | 西安智海电力科技有限公司 | Safe output-current-limiting automatic polarity identification directional power switching circuit |
| CN103227602A (en) * | 2013-05-13 | 2013-07-31 | 广西玉柴博耐特电器有限公司 | Energy-saving voltage regulator |
-
2007
- 2007-10-17 CN CNU2007201028264U patent/CN201113886Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102195265A (en) * | 2010-03-11 | 2011-09-21 | 博格华纳贝鲁系统股份有限公司 | Device and method for protecting an electrical consumer against voltage spikes in a motor vehicle |
| CN102983720A (en) * | 2012-11-30 | 2013-03-20 | 西安智海电力科技有限公司 | Safe output-current-limiting automatic polarity identification directional power switching circuit |
| CN102983720B (en) * | 2012-11-30 | 2015-01-21 | 西安智海电力科技有限公司 | Safe output-current-limiting automatic polarity identification directional power switching circuit |
| CN103227602A (en) * | 2013-05-13 | 2013-07-31 | 广西玉柴博耐特电器有限公司 | Energy-saving voltage regulator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080910 Termination date: 20101017 |