CN2619412Y - Field effect type tubular automobile motor voltage regulator with short circuit protective function - Google Patents
Field effect type tubular automobile motor voltage regulator with short circuit protective function Download PDFInfo
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- CN2619412Y CN2619412Y CN 03212389 CN03212389U CN2619412Y CN 2619412 Y CN2619412 Y CN 2619412Y CN 03212389 CN03212389 CN 03212389 CN 03212389 U CN03212389 U CN 03212389U CN 2619412 Y CN2619412 Y CN 2619412Y
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Abstract
A FET-typed automobile electric generator voltage regulator with the function of short-circuit protection includes power supply cathode, load end, grounding end and FET disposed between the load end and grounding end. Voltage-improved circuit is arranged between the power supply cathode and the grounding end. The output end of the voltage-improved circuit is connected with the gate pole of the FET. Short-circuit protection circuit composed of basal pole current-limiting resistance and switching circuit is disposed between the load end and the grounding end. The input end of the switching circuit is disposed at the gate pole of the FET. The utility model is characterized in simple structure, small volume, low cost, with over voltage and short-circuit protection, no fever when working, high reliability and sensitivity, low power consumption, output power increased 2-3% compared with Darlington-typed automobile electric generator voltage regulator, very extensive application field.
Description
Technical field
The utility model relates to a kind of field effect tubular type automobile current generator voltage regulator that short-circuit protection function is arranged.
Background technology
The automobile current generator voltage regulator is the vitals on the automobile, is paid attention to by automobile production department always.Existing automobile current generator voltage regulator mainly is to adopt semiconductor device to constitute switching circuit, and power switch pipe wherein adopts Darlington transistor or is combined into Darlington circuit with discrete device, the field effect transistor of employing is also arranged as power switch pipe.Adopt the electronic controller of Darlington transistor or Darlington circuit, it is higher to generate heat, and influences the useful life and the reliability of product.When the operating time was long, electronic controller just might burn out.And make the electronic controller of switching tube because the pressure drop big, pipe self of the loaded current of field effect transistor is little with field effect transistor, in application, can too not generate heat.But because the cut-in voltage of an efficient pipe is bigger, for nine pipes that starting resistor is provided by charging indicator light or 11 pipe generators, when engine start, battery voltage is added on the charging indicator light, be added in again through indicator light on the positive source of voltage regulator, be added in voltage 1 volt of the less than on the positive source this moment, electric current is 40mA-80mA.Because the grid voltage of field effect transistor does not reach its cut-in voltage (2.7-5V), field effect transistor itself is not just worked, so generator can not enter generating state, therefore, an efficient pipe can't be popularized use as the automobile current generator voltage regulator of switching tube.In addition, the overvoltage of existing automobile current generator voltage regulator, short-circuit protection circuit are to be made of sample resistance that is serially connected in load end and the triode that is connected on the switching tube input, and sample resistance wherein is in running order all the time.During short circuit, load end is exported big electric current, the sample resistance both end voltage is raise, and then make the triode conducting, makes that switching tube ends in the adjuster, and the problem of its existence is that sampling resistor is in running order all the time, and power consumption is big, easily adjuster is burnt out.
Summary of the invention
The purpose of this utility model is to solve the problem that prior art exists, provide a kind of simple in structure, volume is little, cost is low, do not generate heat when having short-circuit protection function and work, reliability and highly sensitive, power consumption is little, power output is high, the field effect tubular type automobile current generator voltage regulator that short-circuit protection function is arranged of applied range.
The utility model be achieved in that it positive source, load end, an earth terminal are arranged and be connected on load end and earth terminal between field effect transistor; its special character is to be connected to voltage lifting circuit between positive source and earth terminal; the output of said voltage lifting circuit is connected with the grid level of field effect transistor; be connected to the short-circuit protection circuit that is made of base stage current-limiting resistance, switching circuit between load end and earth terminal, the output of said switching circuit is connected on the grid of field effect transistor.
According to the above-mentioned field effect tubular type automobile current generator voltage regulator that short-circuit protection function is arranged, said switching circuit is a compound circuit.
According to the above-mentioned field effect tubular type automobile current generator voltage regulator that short-circuit protection function is arranged, said voltage lifting circuit is the dual operational amplifier that is connected with fet gate by first output; be serially connected in current-limiting resistance and bipolar tube between positive source and dual operational amplifier first output; be connected on current-limiting resistance and electric capacity between positive source and the bipolar tube node; be serially connected in the resistance and the electric capacity of dual operational amplifier second output and ground; be connected on the resistance of dual operational amplifier second output and second positive input terminal; be connected on the power input of operational amplifier and the resistance of second positive input terminal; be connected on the divider resistance that is used for providing supply voltage between power positive end and the earth terminal to dual operational amplifier; be connected on node and the piezo-resistance between the earth terminal and the pressure release electric capacity formation of divider resistance.
According to the above-mentioned field effect tubular type automobile current generator voltage regulator that short-circuit protection function is arranged, said operational amplifier is LM2904, to guarantee operating accuracy and also can operate as normal under low temperature environment.
The field effect tubular type automobile current generator voltage regulator that short-circuit protection function is arranged according to above-mentioned also is connected to divider resistance between dual operational amplifier first output and ground, with regulated output voltage in voltage lifting circuit.
The field effect tubular type automobile current generator voltage regulator that short-circuit protection function is arranged according to above-mentioned is connected to feedback resistance between the input of load end and dual operational amplifier, to improve the output voltage of voltage lifting circuit.
The field effect tubular type automobile current generator voltage regulator that short-circuit protection function is arranged according to above-mentioned is connected to diode or voltage-stabiliser tube between the input of base stage current-limiting resistance and switching circuit.
The utility model has the advantages that:
1, adopt by the load end number of winning the confidence and through the short circuit current protective circuit of switching circuit output, simple in structure, volume is little, itself does not have pyrotoxin, sensitivity and reliability are high, power consumption is little; Simultaneously, adopt the main devices of dual operational amplifier, make voltage lifting circuit functional reliability and highly sensitive as voltage lifting circuit, and simple in structure, volume is little.
2, the employing field effect transistor is not generated heat during work as switching tube, and is little to the power consumption of generator, compares with the automobile voltage generator adjuster of Darlington transistor structure and can improve output of a generator 2～3%; Reliable working performance adopts voltage lifting circuit, the grid voltage of field effect transistor can be brought up in its cut-in voltage scope, guarantees that in nine pipes or 11 pipe generators this voltage regulator for automobile also can operate as normal, and is therefore applied widely.
Description of drawings
Fig. 1 is a circuit block diagram of the present utility model;
Fig. 2 is circuit theory diagrams of the present utility model.
Embodiment
As shown in the figure, the utility model has a positive source B, load end F and earth terminal E, between positive source B and load end F, be connected to continued flow tube D3, between load end F and earth terminal E, be connected to field effect transistor 3 (T4), between positive source B and ground end E, be connected to the floating voltage that constitutes by capacitor C 1 and resistance R 1 and absorb circuit 1, to reduce unloaded pressure reduction when storage battery is arranged.Between positive source B and ground end E, be connected to divider resistance R2, R3 and capacitor C 2, and resistance R 4 and voltage-stabiliser tube D1.Be connected to voltage lifting circuit 2 between positive source B and earth terminal E, the output 8 of said voltage lifting circuit 2 is connected with the grid of field effect transistor T4.Voltage lifting circuit 2 is by dual operational amplifier 7, divider resistance R8 and R9, piezo-resistance R
vWith pressure release capacitor C 4, be connected on resistance R 5 and the capacitor C 3 of operational amplifier 7 second output 2out and ground end E and be connected on the second output 2out and second positive input terminal 2
IN+Between resistance R 6, be connected on the power input V of operational amplifier 7
+With second positive input terminal 2
IN+Between resistance R 7, and be connected on current-limiting resistance R10, bipolar tube T1, current-limiting resistance R11 between first output 8 (lout) of positive source B and operational amplifier 7, be connected on resistance R 12, capacitor C 6 between positive source B and the bipolar tube T1 node, be connected on capacitor C 5 between the bipolar tube T1 output and ground E, be connected on the divider resistance R17 between dual operational amplifier 7 first outputs 8 and the earth terminal E and be connected on load end F and first negative input end 1 of operational amplifier 7
IN-Between feedback resistance R16 constitute.The node 6 of resistance R 4 and voltage-stabiliser tube D1 is connected on first positive input terminal 1 of operational amplifier 7
IN+, the node 5 of resistance R 2 and R3 connects first negative input end 1 of operational amplifier 7
IN-, second negative input end 2 of the node of resistance R 5 and capacitor C 3 and operational amplifier 7
IN-Be connected, one of resistance R 4 terminates at the node 9 of resistance R 8 and R9.Said dual operational amplifier 7 can adopt LM2904, to guarantee operating accuracy and at low temperatures also can operate as normal.Between load end F and earth terminal E, be connected to by base stage current-limiting resistance R13, work diode or the voltage-stabiliser tube D2 that improves effect on thermal and play reduce the output current effect switching circuit (compound circuit) 10 (by the short-circuit protection circuit 4 of triode T2～T3, resistance R 14～R15) formations; be connected on the input utmost point of compound circuit 10 after said base stage current-limiting resistance R13 and the diode D2 series connection, the output of said compound circuit 10 is connected on the grid of field effect transistor T4.
During work, to be added in voltage (not enough 1V) on the power input B by voltage lifting circuit 2, be amplified to more than the 4V in a short period of time, this moment, the output 8 of voltage lifting circuit 2 was exported high potentials, trigger field effect transistor T4 conducting, this automobile current generator voltage regulator enters normal operating conditions.Afterwards, because field effect transistor T4 conducting, the output voltage of generator raises at once, and when being elevated to controlling value, variation has taken place the current potential of dividing potential drop node 5, makes the output voltage of operational amplifier 7 become electronegative potential by high potential, and field effect transistor T4 ends.Because field effect transistor T4 ends, the generator amature outage, the output voltage of generator begins again to descend, and when dropping to controlling value, variation has taken place again the current potential of node 5, make output 8 current potentials of operational amplifier 7 become high potential again, field effect transistor T4 begins conducting again, and the output voltage of generator begins again to raise, when being increased to controlling value, repeat above-mentioned operating state again, realize control purpose automatically.
Between pricking appears in the rotor coil of generator between the positive source B of short circuit or this adjuster and load end F during short circuit; the tube voltage drop of field effect transistor T4 can raise fast; be that voltage between load end F and the earth terminal E raises fast; make transistor T 2, T3 conducting again; make the field effect transistor T4 control utmost point become electronegative potential, field effect transistor T4 ends immediately, and field effect transistor T4 itself has obtained effective protection thus; and then make this adjuster obtain protection, prevent that it from being burnt out puncture.
Claims (7)
1, a kind of field effect tubular type automobile current generator voltage regulator that short-circuit protection function is arranged; comprise positive source, load end, earth terminal and be connected on load end and earth terminal between field effect transistor; it is characterized in that: between positive source and earth terminal, be connected to voltage lifting circuit; the output of said voltage lifting circuit is connected with the grid level of field effect transistor; be connected to the short-circuit protection circuit that is made of base stage current-limiting resistance, switching circuit between load end and earth terminal, the output of said switching circuit is connected on the grid of field effect transistor.
2, the field effect tubular type automobile current generator voltage regulator that short-circuit protection function is arranged according to claim 1, it is characterized in that: said switching circuit is a compound circuit, to improve sensitivity and to reduce operating current.
3; the field effect tubular type automobile current generator voltage regulator that short-circuit protection function is arranged according to claim 1 and 2, it is characterized in that: said voltage lifting circuit is the dual operational amplifier that is connected with fet gate by first output; be serially connected in current-limiting resistance and bipolar tube between positive source and dual operational amplifier first output; be connected on current-limiting resistance and electric capacity between positive source and the bipolar tube node; be serially connected in the resistance and the electric capacity of dual operational amplifier second output and ground; be connected on the resistance of dual operational amplifier second output and second positive input terminal; be connected on the power input of operational amplifier and the resistance of second positive input terminal; be connected on the divider resistance that is used for providing supply voltage between power positive end and the earth terminal to dual operational amplifier; be connected on node and the piezo-resistance between the earth terminal and the pressure release electric capacity formation of divider resistance.
4, the field effect tubular type automobile current generator voltage regulator that short-circuit protection function is arranged according to claim 3, it is characterized in that: said operational amplifier is LM2904, to guarantee operating accuracy and also can operate as normal under low temperature environment.
5, according to claim 3 or the 4 described field effect tubular type automobile current generator voltage regulators that short-circuit protection function is arranged; it is characterized in that: in voltage lifting circuit, also be connected to divider resistance between dual operational amplifier first output and ground, with regulated output voltage.
6, according to claim 3 or the 4 described field effect tubular type automobile current generator voltage regulators that short-circuit protection function is arranged, it is characterized in that: between the input of load end and dual operational amplifier, be connected to feedback resistance, to improve the output voltage of voltage lifting circuit.
7, the field effect tubular type automobile current generator voltage regulator that short-circuit protection function is arranged according to claim 1 and 2 is characterized in that: be serially connected with diode or voltage-stabiliser tube between the input of base stage current-limiting resistance and switching circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03212389 CN2619412Y (en) | 2003-04-02 | 2003-04-02 | Field effect type tubular automobile motor voltage regulator with short circuit protective function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03212389 CN2619412Y (en) | 2003-04-02 | 2003-04-02 | Field effect type tubular automobile motor voltage regulator with short circuit protective function |
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| Publication Number | Publication Date |
|---|---|
| CN2619412Y true CN2619412Y (en) | 2004-06-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03212389 Expired - Fee Related CN2619412Y (en) | 2003-04-02 | 2003-04-02 | Field effect type tubular automobile motor voltage regulator with short circuit protective function |
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| CN (1) | CN2619412Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100435476C (en) * | 2006-09-11 | 2008-11-19 | 锦州海伯伦汽车电子有限公司 | Voltage regulator for vehicle alternating current generator |
| CN101702613B (en) * | 2009-11-14 | 2011-12-07 | 赵树林 | Low-voltage start circuit of field effect transistor voltage regulator |
| CN102684155A (en) * | 2012-05-04 | 2012-09-19 | 赵树林 | Voltage regulator with function of protecting operating voltage of automobile alternator from being out of control |
| CN103208780A (en) * | 2013-04-12 | 2013-07-17 | 苏州欧泰克电子科技有限公司 | Direct current motor control circuit with heat protection function |
-
2003
- 2003-04-02 CN CN 03212389 patent/CN2619412Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100435476C (en) * | 2006-09-11 | 2008-11-19 | 锦州海伯伦汽车电子有限公司 | Voltage regulator for vehicle alternating current generator |
| CN101702613B (en) * | 2009-11-14 | 2011-12-07 | 赵树林 | Low-voltage start circuit of field effect transistor voltage regulator |
| CN102684155A (en) * | 2012-05-04 | 2012-09-19 | 赵树林 | Voltage regulator with function of protecting operating voltage of automobile alternator from being out of control |
| CN102684155B (en) * | 2012-05-04 | 2015-09-16 | 赵树林 | There is the voltage regulator of protection automobile current generator operating voltage function out of control |
| CN103208780A (en) * | 2013-04-12 | 2013-07-17 | 苏州欧泰克电子科技有限公司 | Direct current motor control circuit with heat protection function |
| CN103208780B (en) * | 2013-04-12 | 2016-01-27 | 苏州欧泰克电子科技有限公司 | Direct current motor control circuit with thermal protection function |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |