CN203352133U - 12V power supply protection circuit for electrically-driven controller of electric vehicle - Google Patents
12V power supply protection circuit for electrically-driven controller of electric vehicle Download PDFInfo
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- CN203352133U CN203352133U CN 201320483430 CN201320483430U CN203352133U CN 203352133 U CN203352133 U CN 203352133U CN 201320483430 CN201320483430 CN 201320483430 CN 201320483430 U CN201320483430 U CN 201320483430U CN 203352133 U CN203352133 U CN 203352133U
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Abstract
The utility model discloses a 12V power supply protection circuit for an electrically-driven controller of electric vehicles. The 12V power supply protection circuit is characterized by comprising a voltage reference setting circuit, an over/under-voltage protection circuit formed by a triode Q2, and a reverse-connection protection circuit, wherein the voltage reference setting circuit is composed of a voltage-stabilizing tube Z2 and a voltage-stabilizing tube Z3, and is used for setting a threshold value of a power supply voltage; the over/under-voltage protection circuit formed by a triode Q2 is used for cutting off a power supply loop by changing a control voltage of a switching tube Q3 when the power supply voltage exceeds the threshold value; and the reverse-connection protection circuit composed of a switching tube Q1 and a resistor R1 is used for cutting off the power supply loop by controlling a control voltage of the switching tube Q1 to be reversed when the power supply voltage is reversely connected. The 12V power supply protection circuit automatically cuts off the power supply loop when failures of power supply such as overvoltage, undervoltage and reverse connection occur, thereby the controller system is protected.
Description
Technical field
The utility model relates to a kind of electric driving governor 12V supply power voltage protective circuit in electric automobile that is applied in.
Background technology
In electric vehicle controller, the required power supply of all chips all converts through DC/DC by car load 12V lead acid accumulator, if the 12V spread of voltage of lead-acid battery, will directly affect the normal operation of controller controling circuit, and then affect vehicle performance, cause traffic safety hidden danger.Therefore must carry out real-time guard to 12V voltage, once the faults such as overvoltage, under-voltage, reversal connection occur, should cut off immediately current supply circuit, with the normal working performance of protection electric automobile electricity driving governor.But, there is no so far the open report about electric automobile electricity driving governor 12V power supply protection circuit.
The utility model content
The utility model is for avoiding the existing weak point of above-mentioned prior art; a kind of electric automobile electricity driving governor 12V power supply protection circuit is provided; make and surpass or during lower than the threshold value set, cut off in time power supply when supply power voltage, realize the protection to controller.
The utility model adopts following scheme for solving above technical problem:
The characteristics of the utility model electric automobile electricity driving governor 12V power supply protection circuit are to comprise:
One voltage reference consisted of voltage-stabiliser tube Z2, voltage-stabiliser tube Z3, resistance R 2 and resistance R 5 arranges circuit, for setting the threshold values of supply power voltage, comprises overvoltage threshold and under-voltage threshold value;
One over under-voltage protection circuit consisted of triode Q2, resistance R 3 and resistance R 4, be when supply power voltage surpasses described threshold values, by changing the control voltage of switching tube Q3, cuts off current supply circuit;
One reverse-connection protection circuit consisted of switching tube Q1, voltage-stabiliser tube Z1 and resistance R 1, be when the supply power voltage reversal connection, by the control voltage reversal of control switch pipe Q1, cuts off current supply circuit.
The characteristics of the utility model electric automobile electricity driving governor 12V power supply protection circuit also are:
Described voltage reference arranges circuit, by described resistance R 2 and voltage-stabiliser tube Z2, forms overvoltage protection threshold values circuit; Form under-voltage protection threshold values circuit by described resistance R 5 and voltage-stabiliser tube Z3; The source electrode of one termination switching tube Q3 of described resistance R 2, the negative electrode of another termination voltage-stabiliser tube Z2 of resistance R 2, the plus earth of voltage-stabiliser tube Z2; The grid of one termination switching tube Q3 of described resistance R 5, the negative electrode of another termination voltage-stabiliser tube Z3 of resistance R 5, the plus earth of voltage-stabiliser tube Z3;
Described over under-voltage protection circuit, by the negative electrode of a termination voltage-stabiliser tube Z2 of resistance R 3, the base stage of another termination triode Q2 of resistance R 3; The emitter of triode Q2 connects the source electrode of switching tube Q3, and the collector electrode of triode Q2 connects the grid of switching tube Q3; The source electrode of one termination switching tube Q3 of resistance R 4, the grid of another termination switching tube Q3 of resistance R 4; The source electrode of switching tube Q3 is connected with the source electrode of switching tube Q1, with the drain electrode of described switching tube Q3, meets output end vo ut;
Described reverse-connection protection circuit, by the grid of switching tube Q1, by resistance R 1 ground connection, the anode of voltage-stabiliser tube Z1 connects the grid of switching tube Q1, and the negative electrode of voltage-stabiliser tube Z1 connects the source electrode of switching tube Q1, with the drain electrode of described switching tube Q1, meets input Vin.
Compared with the prior art, the utility model beneficial effect is embodied in:
The utility model can be inputted the 12V voltage status in the Real-Time Monitoring outside; when overvoltage, under-voltage and reversal connection have appearred in this voltage; switching tube turn-offs output, prevents that related device from still working under the power supply trouble state, and protection device especially power device IGBT is not damaged.
The accompanying drawing explanation
Fig. 1 is circuit theory diagrams of the present utility model.
Embodiment
Referring to Fig. 1, in the present embodiment, electric automobile electricity driving governor 12V power supply protection circuit comprises:
One voltage reference consisted of voltage-stabiliser tube Z2, voltage-stabiliser tube Z3, resistance R 2 and resistance R 5 arranges circuit, for setting the threshold values of supply power voltage, comprises overvoltage threshold and under-voltage threshold value;
One over under-voltage protection circuit consisted of triode Q2, resistance R 3 and resistance R 4, be when supply power voltage surpasses threshold values, by changing the control voltage of switching tube Q3, cuts off current supply circuit;
One reverse-connection protection circuit consisted of switching tube Q1, voltage-stabiliser tube Z1 and resistance R 1, be when the supply power voltage reversal connection, by the control voltage reversal of control switch pipe Q1, cuts off current supply circuit.
In concrete enforcement, voltage reference arranges circuit, by resistance R 2 and voltage-stabiliser tube Z2, forms overvoltage protection threshold values circuit; Form under-voltage protection threshold values circuit by resistance R 5 and voltage-stabiliser tube Z3; The source electrode of one termination switching tube Q3 of resistance R 2, the negative electrode of another termination voltage-stabiliser tube Z2 of resistance R 2, the plus earth of voltage-stabiliser tube Z2; The grid of one termination switching tube Q3 of resistance R 5, the negative electrode of another termination voltage-stabiliser tube Z3 of resistance R 5, the plus earth of voltage-stabiliser tube Z3;
Over under-voltage protection circuit, by the negative electrode of a termination voltage-stabiliser tube Z2 of resistance R 3, the base stage of another termination triode Q2 of resistance R 3; The emitter of triode Q2 connects the source electrode of switching tube Q3, and the collector electrode of triode Q2 connects the grid of switching tube Q3; The source electrode of one termination switching tube Q3 of resistance R 4, the grid of another termination switching tube Q3 of resistance R 4; The source electrode of switching tube Q3 is connected with the source electrode of switching tube Q1, with the drain electrode of switching tube Q3, meets output end vo ut;
Reverse-connection protection circuit, by the grid of switching tube Q1, by resistance R 1 ground connection, the anode of voltage-stabiliser tube Z1 connects the grid of switching tube Q1, and the negative electrode of voltage-stabiliser tube Z1 connects the source electrode of switching tube Q1, with the drain electrode of switching tube Q1, meets input Vin.
In concrete enforcement, as shown in Figure 1, by the parameter of voltage-stabiliser tube Z2 and voltage-stabiliser tube Z3, select, set overvoltage threshold and the under-voltage threshold value of 12V voltage; When the overvoltage threshold of surpass setting when the 12V battery tension and under-voltage threshold value, switching tube Q3 closes output, cuts off current supply circuit.
Under normal operation, due to the voltage stabilizing value of 12V supply power voltage lower than voltage-stabiliser tube Z2, and higher than the voltage stabilizing value of voltage-stabiliser tube Z3, so voltage-stabiliser tube Z2 do not work, triode Q2 cut-off; And voltage-stabiliser tube Z3 is in conducting state, voltage is added between the grid and source electrode of switching tube Q3, switching tube Q3 conducting work, and power supply is normal; When 12V voltage surpasses in controller circuitry the receptible maximum input voltage of institute, voltage-stabiliser tube Z2 conducting, triode Q2 conducting, make grid and the source electrode short circuit of switching tube Q3, the control voltage of switching tube Q3 is zero, and therefore switching tube Q3 closes output, and current supply circuit is cut off; In like manner, when the 12V battery tension lower than controller circuitry in institute during receptible minimum voltage, not conducting of voltage-stabiliser tube Z3, the control voltage of switching tube Q3 is zero, switching tube Q3 closes output, current supply circuit is cut off.
When the power supply reversal connection, the control voltage of switching tube Q1 is inverted through resistance R 1, and switching tube Q1 closes output, cuts off current supply circuit.
Claims (2)
1. electric automobile electricity driving governor 12V power supply protection circuit is characterized in that comprising:
One voltage reference consisted of voltage-stabiliser tube Z2, voltage-stabiliser tube Z3, resistance R 2 and resistance R 5 arranges circuit, for setting the threshold values of supply power voltage, comprises overvoltage threshold and under-voltage threshold value;
One over under-voltage protection circuit consisted of triode Q2, resistance R 3 and resistance R 4, be when supply power voltage surpasses described threshold values, by changing the control voltage of switching tube Q3, cuts off current supply circuit;
One reverse-connection protection circuit consisted of switching tube Q1, voltage-stabiliser tube Z1 and resistance R 1, be when the supply power voltage reversal connection, by the control voltage reversal of control switch pipe Q1, cuts off current supply circuit.
2. electric automobile according to claim 1 electricity driving governor 12V power supply protection circuit is characterized in that:
Described voltage reference arranges circuit, by described resistance R 2 and voltage-stabiliser tube Z2, forms overvoltage protection threshold values circuit; Form under-voltage protection threshold values circuit by described resistance R 5 and voltage-stabiliser tube Z3; The source electrode of one termination switching tube Q3 of described resistance R 2, the negative electrode of another termination voltage-stabiliser tube Z2 of resistance R 2, the plus earth of voltage-stabiliser tube Z2; The grid of one termination switching tube Q3 of described resistance R 5, the negative electrode of another termination voltage-stabiliser tube Z3 of resistance R 5, the plus earth of voltage-stabiliser tube Z3;
Described over under-voltage protection circuit, by the negative electrode of a termination voltage-stabiliser tube Z2 of resistance R 3, the base stage of another termination triode Q2 of resistance R 3; The emitter of triode Q2 connects the source electrode of switching tube Q3, and the collector electrode of triode Q2 connects the grid of switching tube Q3; The source electrode of one termination switching tube Q3 of resistance R 4, the grid of another termination switching tube Q3 of resistance R 4; The source electrode of switching tube Q3 is connected with the source electrode of switching tube Q1, with the drain electrode of described switching tube Q3, meets output end vo ut;
Described reverse-connection protection circuit, by the grid of switching tube Q1, by resistance R 1 ground connection, the anode of voltage-stabiliser tube Z1 connects the grid of switching tube Q1, and the negative electrode of voltage-stabiliser tube Z1 connects the source electrode of switching tube Q1, with the drain electrode of described switching tube Q1, meets input Vin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320483430 CN203352133U (en) | 2013-08-08 | 2013-08-08 | 12V power supply protection circuit for electrically-driven controller of electric vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320483430 CN203352133U (en) | 2013-08-08 | 2013-08-08 | 12V power supply protection circuit for electrically-driven controller of electric vehicle |
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| Publication Number | Publication Date |
|---|---|
| CN203352133U true CN203352133U (en) | 2013-12-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320483430 Withdrawn - After Issue CN203352133U (en) | 2013-08-08 | 2013-08-08 | 12V power supply protection circuit for electrically-driven controller of electric vehicle |
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| Country | Link |
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| CN (1) | CN203352133U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103384056A (en) * | 2013-08-08 | 2013-11-06 | 安徽巨一自动化装备有限公司 | 12-V power supply protection circuit for electric driving controller of electromobile |
-
2013
- 2013-08-08 CN CN 201320483430 patent/CN203352133U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103384056A (en) * | 2013-08-08 | 2013-11-06 | 安徽巨一自动化装备有限公司 | 12-V power supply protection circuit for electric driving controller of electromobile |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20131218 Effective date of abandoning: 20150819 |
|
| RGAV | Abandon patent right to avoid regrant |