CN100433483C - Main circuit reverse-joint protection circuit of motor-driving control system for electric automobile - Google Patents
Main circuit reverse-joint protection circuit of motor-driving control system for electric automobile Download PDFInfo
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- CN100433483C CN100433483C CNB2004100003468A CN200410000346A CN100433483C CN 100433483 C CN100433483 C CN 100433483C CN B2004100003468 A CNB2004100003468 A CN B2004100003468A CN 200410000346 A CN200410000346 A CN 200410000346A CN 100433483 C CN100433483 C CN 100433483C
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- relay
- reverse
- control system
- driving control
- vdc
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Abstract
The present invention relates to a relay reverse connection protecting circuit which relates to a relay reverse connection protecting circuit for main loops of motor driven control systems of electric automobiles. In the present invention, a loop is composed of a dynamic accumulator, a diode, a stabilivolt and a relay; when the accumulator is connected in the forward direction, the loop is switched on, current flows through a wire pack of the relay, and a normally opening contact is switched off; when the accumulator is connected in the reverse distance, the normally open contact has no action; the switching on and the switching off of the contact are used for realizing reverse connection protection. The present invention has the advantages of simple structure, convenient operation and low cost and not only is suitable for motor driven control systems of electric automobiles, but also can be applied to other fields.
Description
Technical field
The present invention relates to the relay reverse-connection protection circuit, particularly relate to a kind of motor in electric automobile driving control system major loop relay reverse-connection protection circuit.
Background technology
Motor in electric automobile driving control system major loop is made of three parts: the power accumulator group, and tank circuit, inverter, as shown in Figure 1.The power accumulator group provides DC power supply.Tank circuit absorbs voltage (electric current) pulsation that is produced by inverter loop.The effect of inverter is to make six device for power switching conductings, shutoff in the determined time regularly, thereby direct current power is transformed to required interchange output.The KJ2 branch road seals in current-limiting resistance R, and effect is that charge-current limit with storage capacitor C is in allowed band.When C is charged to a certain degree, KJ1 is connected, KJ2 disconnects.
In this system, if the reversal connection of power accumulator group will bring very serious consequence, transistor moment is burnt, and causes tremendous loss.If between DC power supply and inverter, connect a crystal diode, can play the purpose of reverse connecting protection in theory.But just connecing conducting moment, because the impedance of storage capacitor is almost nil, main circuit current will reach the hundreds of ampere, and this type selecting to crystal diode has proposed very high requirement.Employing can be born the diode of so big electric current and be considered it all is worthless from cost, volume and purchase convenience aspect.
Summary of the invention
For overcoming the defective of prior art, solve motor in electric automobile driving control system major loop reverse connecting protection problem and the present invention proposes a kind of simple, novel relay reverse-connection protection circuit.
The technical scheme that the present invention takes is: form a loop by power accumulator group, diode, voltage-stabiliser tube and relay.When accumulator positive connects, this loop conducting, relay line bag flows through electric current, the normally opened contact closure, during reverse connection of accumulator, normally opened contact is failure to actuate.Connection by this contact realizes reverse connecting protection with shutoff.The present invention has improved the reliability of driving control system for electric machine effectively, and is simple in structure, with low cost, easy to operate.Its range of application can be generalized to other wide field by the motor in electric automobile driving control system.
Description of drawings
Fig. 1 is prior art motor in electric automobile driving control system main loop circuit figure.
Fig. 2 is the main loop circuit figure of the specific embodiment of the invention.
Embodiment
Further specify the present invention below in conjunction with the drawings and specific embodiments.
As shown in Figure 2, reverse-connection protection circuit of the present invention is made up of diode VD1, voltage-stabiliser tube VD2 and the 3rd relay K M3.Power accumulator group VDC one terminating diode VD1 positive pole, the VD1 negative pole connects voltage-stabiliser tube VD2 negative pole, and the VD2 positive pole connects the 3rd relay K M3 positive pole, and the 3rd relay K M3 negative pole links to each other with the power accumulator group other end.The normally opened contact KJ3 one termination small power supply VCC of the 3rd relay K M3, the other end links to each other with the second relay K M2 with the first relay K M1 with turn-on logic.Output 1,2 connects tank circuit and inverter.
The specific embodiment of the present invention is to adopt the 3rd relay K M3 to realize the reverse connecting protection of driving control system for electric machine, and KJ3 is the 3rd relay K M3 normally opened contact.VDC can be the DC power supply of 42V～360V, and VCC is a small power supply, and its magnitude of voltage is got according to selected relay rated voltage, such as 12V, and 24V, 36V or 48V.The 3rd relay K M3 is for there being polarity relay, and it is fixed that its type selecting is come by concrete application circuit, can get rated voltage and be 12V, 24V or the relay of voltage levels more.The effect of voltage-stabiliser tube is a dividing potential drop, if DC power supply voltage is excessive, can adopt a plurality of voltage-stabiliser tube series connection dividing potential drops.With the 42V electric pressure is example, VDC=42V, and VCC=12V, VD1 gets IN4002, and VD2 gets BWB20D, and KM3 gets the relay G6E-134P-ST-US that rated voltage is 24V.
When the power accumulator group is just connecing, diode VD1, voltage-stabiliser tube VD2, the 3rd relay K M3 constitutes a path, electric current through diode VD1, voltage-stabiliser tube VD2, the 3rd relay K M3 to power accumulator group VDC negative pole, normally opened contact KJ3 closure, system's operate as normal; During power accumulator group VDC reversal connection, this not conducting of loop, normally opened contact KJ3 is failure to actuate, and plays the effect of reverse connecting protection.
The present invention is simple in structure, and is easy to operate, with low cost, is not only applicable to the motor in electric automobile driving control system, also can be applicable to other wide field.
Claims (1)
1. motor in electric automobile driving control system major loop reverse-connection protection circuit, it is characterized in that diode (VD1) positive pole links to each other with power accumulator group (VDC), negative pole connects voltage-stabiliser tube (VD2) negative pole, the 3rd relay (KM3) line bag one termination voltage-stabiliser tube (VD2) positive pole, the other end links to each other with power accumulator group (VDC); Normally opened contact (KJ3) termination small power supply (VCC) of the 3rd relay (KM3), the other end links to each other with second relay (KM2) with first relay (KM1) with turn-on logic; When power accumulator group (VDC) when just connecing, normally opened contact (KJ3) closure, during power accumulator group (VDC) reversal connection, normally opened contact (KJ3) is failure to actuate, and plays the effect of reverse connecting protection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100003468A CN100433483C (en) | 2004-01-09 | 2004-01-09 | Main circuit reverse-joint protection circuit of motor-driving control system for electric automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100003468A CN100433483C (en) | 2004-01-09 | 2004-01-09 | Main circuit reverse-joint protection circuit of motor-driving control system for electric automobile |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1641953A CN1641953A (en) | 2005-07-20 |
| CN100433483C true CN100433483C (en) | 2008-11-12 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100003468A Expired - Fee Related CN100433483C (en) | 2004-01-09 | 2004-01-09 | Main circuit reverse-joint protection circuit of motor-driving control system for electric automobile |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100433483C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102369644B (en) * | 2011-06-08 | 2013-03-27 | 华为技术有限公司 | Control circuit for preventing battery group from being reversely connected and power supply system for base station |
| CN102756655A (en) * | 2012-07-11 | 2012-10-31 | 合肥华耀电子工业有限公司 | Novel input reverse-connection-preventing circuit |
| CN106696710B (en) * | 2016-11-29 | 2018-11-27 | 天津易鼎丰动力科技有限公司 | A kind of application method of high-voltage DC contactor safeguard protection for electric vehicle |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10336905A (en) * | 1997-06-02 | 1998-12-18 | Harness Sogo Gijutsu Kenkyusho:Kk | Battery reverse connection protecting equipment |
| JP2001128370A (en) * | 1999-10-28 | 2001-05-11 | Alps Electric Co Ltd | Protective circuit for reverse connection of power supply |
| JP2002118958A (en) * | 2000-10-02 | 2002-04-19 | Keihin Corp | Protector against reverse connection of power supply |
| CN1355607A (en) * | 2000-11-30 | 2002-06-26 | 点晶科技股份有限公司 | Circuit with protection to error-polarity connection of power supply |
| US20020125771A1 (en) * | 2001-03-06 | 2002-09-12 | Gary Kaminski | Electrical interface device for towing |
| CN2514565Y (en) * | 2002-01-10 | 2002-10-02 | 上海埃通电气股份有限公司 | Power reverse connecting-preventing device for network communication interface equipment |
-
2004
- 2004-01-09 CN CNB2004100003468A patent/CN100433483C/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10336905A (en) * | 1997-06-02 | 1998-12-18 | Harness Sogo Gijutsu Kenkyusho:Kk | Battery reverse connection protecting equipment |
| JP2001128370A (en) * | 1999-10-28 | 2001-05-11 | Alps Electric Co Ltd | Protective circuit for reverse connection of power supply |
| JP2002118958A (en) * | 2000-10-02 | 2002-04-19 | Keihin Corp | Protector against reverse connection of power supply |
| CN1355607A (en) * | 2000-11-30 | 2002-06-26 | 点晶科技股份有限公司 | Circuit with protection to error-polarity connection of power supply |
| US20020125771A1 (en) * | 2001-03-06 | 2002-09-12 | Gary Kaminski | Electrical interface device for towing |
| CN2514565Y (en) * | 2002-01-10 | 2002-10-02 | 上海埃通电气股份有限公司 | Power reverse connecting-preventing device for network communication interface equipment |
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| Publication number | Publication date |
|---|---|
| CN1641953A (en) | 2005-07-20 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081112 Termination date: 20120109 |