CN106357101A - Active discharge circuit for filter capacitor of electric automobile controller - Google Patents
Active discharge circuit for filter capacitor of electric automobile controller Download PDFInfo
- Publication number
- CN106357101A CN106357101A CN201610870915.7A CN201610870915A CN106357101A CN 106357101 A CN106357101 A CN 106357101A CN 201610870915 A CN201610870915 A CN 201610870915A CN 106357101 A CN106357101 A CN 106357101A
- Authority
- CN
- China
- Prior art keywords
- filter capacitor
- audion
- resistance
- controller
- discharge circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
- H02M1/322—Means for rapidly discharging a capacitor of the converter for protecting electrical components or for preventing electrical shock
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Networks Using Active Elements (AREA)
Abstract
The invention discloses an active discharge circuit for a filter capacitor of an electric automobile controller. The active discharge circuit for the filter capacitor of the electric automobile controller comprises a filter capacitor C which is arranged at the two ends of a controller power supply, and is characterized by also comprising a control module and a discharge module; the discharge module is connected in parallel with the two ends (B+, B-) of the filter capacitor C; the control module controls the discharge circuit to discharge the capacitor C or not; the control module is connected with the controller. The active discharge circuit for the filter capacitor of the electric automobile controller has the advantages that whether the filter capacitor is discharged or not is determined by the discharge circuit according to a power supply circuit of the controller, so that the discharge is more accurate; energy stored in the capacitor is released quickly when the controller is shut down; the defects of energy consumption and heating caused by continuous discharge of the discharge circuit in the prior art are overcome.
Description
Technical field
The present invention relates to a kind of electric vehicle controller protection circuit, particularly to a kind of electric vehicle controller filtered electrical
Hold active discharge circuit.
Background technology
Present New-energy electric vehicle controller needs both ends of power internally to add filter capacitor to ensure bus mostly
The fluctuation of voltage is in tolerance interval.After the completion of controller work, external system power supply can be closed, at this moment inside filter capacitor
If the electric energy of storage does not discharge, potential safety hazard can be caused to controller.
Control new energy vehicle controller on market, prior art direct parallel discharge resistance.Controller is not added with discharging
Circuit is the inadvisable potential safety hazard obtaining, there is damage controller.Directly in electric capacity both positive and negative polarity parallel resistance 2 points of shortcomings of presence:
First can produce to the energy and waste, because discharge resistance is direct positive and negative two ends in parallel, controller electricity condition when electric discharge
Resistance is discharging always, discharges always, can make waste of energy, the electricity of impact automobile；Second can produce bad shadow to controller
Ring, because discharge resistance has been at discharge condition, it produces heat and also greatly improves the temperature rise so that controller, many institute's weeks
Know that temperature is very big to the life-span of electronic devices and components and reliability effect.Two above shortcoming makes prior art in electric capacity
Device affects the performance of electric vehicle controller.
Content of the invention
It is an object of the invention to provide a kind of electric capacity automobile controller filter capacitor active discharge circuit, solve prior art
The confirmation filtered electrical of defect active so that whether discharge circuit can work according to controller of middle filter capacitor discharge circuit
Hold the need of electric discharge.
In order to achieve the above object, technical scheme includes the filter capacitor c being arranged on controller power source two ends,
Described active discharge circuit also includes control module and discharge module, and described discharge module is connected in parallel on filter capacitor c two ends
(b+, b-), described control module controls whether discharge circuit discharges to electric capacity c, described control module and controller
Connect.
Described control module includes photo-coupler u1, and described photo-coupler receives the output signal of controller, described
The outfan of photo-coupler be connected with the base stage of audion q2, resistance r4 and resistance r8 be connected in parallel on filter capacitor c two ends (b+,
B-) forming bleeder circuit provides base voltage for audion q2 base stage, and the described emitter stage of audion q2 is with audion q1's
Base stage connection, the described emitter stage of audion q1 and colelctor electrode two ends parallel resistance r3, resistance r2 and resistance r6 is connected in parallel on filter
Ripple electric capacity two ends (b+, b-) form bleeder circuit and provide base voltage for audion q1 base stage, and electricity is passed through at the b+ end of filter capacitor c
Resistance r1 is connected with the colelctor electrode of audion q1, and the colelctor electrode of the described emitter stage of audion q1 and audion q2 is equal and filtered electrical
The b- end holding connects.
Described discharge circuit is discharge resistance r.Described audion q1 is npn audion, described audion q2
For pnp audion.
It is an advantage of the invention that discharge circuit according to the power supply circuits of controller determine whether to filter capacitor electric discharge so that
Electric discharge more accurately so that in the case that controller cuts out the storage of quick release electric capacity energy；Solve to put in prior art
The energy consumption that circuit continuous discharge brings and the defect of heating.
Brief description
Fig. 1 is the schematic diagram of active discharge circuit of the present invention.
Specific embodiment
Below in conjunction with the accompanying drawings the present invention is described further.
As shown in figure 1, the active discharge circuit in parallel of the present invention is at the filter capacitor c two ends needing electric discharge.Controller
Outfan is connected with photo-coupler u1 by vin and vout respectively, and photo-coupler u1 receives the signal of telecommunication from controller.Filtering
The two ends of electric capacity are respectively positive pole b+ end and negative pole b- end, and outfan one end of optocoupler is connected with the base stage of audion q2, another
End is connected to the b- end of filter capacitor.The colelctor electrode of audion q2 is connected with the b- end of filter capacitor c, the emitter stage of audion q2
It is connected with the base stage of audion q1.The colelctor electrode of audion q1 and emitter stage parallel resistance r3, the b+ end of filter capacitor is passed through to put
Electric resistor r1 is connected with the colelctor electrode of audion q1.Audion q1 is npn audion, and audion q2 is pnp audion.
It is connected in parallel on both ends of filter capacitor after resistance r4 and resistance r8 series connection, forms bleeder circuit, the base stage of audion connects
Between resistance r4 and resistance r8.Resistance r2 one end is connected with b+ end, and the other end passes through current resistor r5 and audion respectively
The base stage of q1 connects, and is connected with the b- end of filter capacitor c by resistance r6, electric capacity c1 is connected in parallel on the two ends of resistance r6, stabilivolt
W1 positive pole is connected with the b- end of filter capacitor c, and negative pole is connected with the emitter stage of audion q2.Resistance r8 two ends shunt capacitance c2.
Resistance r4 and resistance r8 forms bleeder circuit, and the base stage for audion q2 provides driving voltage, and electric capacity c2 ensures voltage certain
Persistently keep constant in time.Resistance r2 and resistance r6 is connected in parallel on both ends of filter capacitor and forms bleeder circuit in the same manner is audion q1
Base stage provide voltage, electric capacity c1 keep voltage constant.Ensure that audion q1 and q2 is in institute all the time again during active discharge
The state needing, persistently makes filter capacitor discharge.Photo-coupler plays the effect of signal isolation so that whole circuit is more stable.
The operation principle of whole circuit is: when controller power source is opened, controller continuous firing, and the light being connected with controller
The signal of telecommunication receiving controller that bonder can continue, and export the base stage of audion q2 so that audion q2 is in and leads
Logical working condition, due to triode ON internal resistance very little, vc is approximately 0v, then audion q2 work can drag down the base of audion q1
So that audion q1 can not turn on, audion q1's pole level does not work, and is in the state of open circuit, resistance r3 resistance value is very
Greatly so that the resistance being entirely connected in parallel on both ends of filter capacitor reaches off state, be equivalent to off state, filter capacitor is not put
Electricity；When the power-off of automobile controller, automobile controller does not work, and the input of photo-coupler does not have signal input, light
Bonder does not work, and audion q2 does not work, and audion q1 base voltage is obtained by resistance r2 and resistance r6 partial pressure, audion q1
Conducting, due to triode ON internal resistance very little, resistance r3 is equivalent to and is shorted, and whole circuit equivalent is the b+ end of filter capacitor c
Output sequentially passes through the b- end that resistance r1. audion q1 reaches filter capacitor c, forms discharge loop, discharge resistance r1 is to filtering
Electric capacity discharges.
Above active discharge circuit to be controlled using the working condition that circuit module actively gathers automobile controller entirely to be put
Whether electricity Dian road works, and not using extra control device, discharge stability is reliable.
Above in conjunction with accompanying drawing, the present invention is exemplarily described it is clear that the present invention implements is not subject to aforesaid way
Restriction, as long as employing method of the present invention design and the various improvement that carry out of technical scheme, or not improved direct application
In other occasions, all within protection scope of the present invention.
Claims (4)
1. electric vehicle controller filter capacitor active discharge circuit, including the filter capacitor c being arranged on controller power source two ends,
It is characterized in that: described active discharge circuit also includes control module and discharge module, and described discharge module is connected in parallel on filter
Ripple electric capacity c two ends (b+, b-), described control module controls whether discharge circuit discharges to filter capacitor c, described control
Molding block is connected with controller.
2. electric vehicle controller filter capacitor active discharge circuit as claimed in claim 1 it is characterised in that: described control
Molding block includes photo-coupler u1, and described photo-coupler receives the output signal of controller, the output of described photo-coupler
End is connected with the base stage of audion q2, and resistance r4 and resistance r8 is connected in parallel on filter capacitor c two ends (b+, b-) formation bleeder circuit and is
Audion q2 base stage provides base voltage, and the described emitter stage of audion q2 is connected with the base stage of audion q1, and described three
The emitter stage of pole pipe q1 and colelctor electrode two ends parallel resistance r3, resistance r2 and resistance r6 is connected in parallel on both ends of filter capacitor (b+, b-)
Forming bleeder circuit provides base voltage for audion q1 base stage, and resistance r1 and audion q1's passed through in the b+ end of filter capacitor c
Colelctor electrode connects, and the described emitter stage of audion q1 is all connected with the b- end of filter capacitor with the colelctor electrode of audion q2.
3. electric vehicle controller filter capacitor active discharge circuit as claimed in claim 1 it is characterised in that: described puts
Circuit is discharge resistance r.
4. electric vehicle controller filter capacitor active discharge circuit as claimed in claim 1 it is characterised in that: described three
Pole pipe q1 is npn audion, and described audion q2 is pnp audion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610870915.7A CN106357101A (en) | 2016-09-29 | 2016-09-29 | Active discharge circuit for filter capacitor of electric automobile controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610870915.7A CN106357101A (en) | 2016-09-29 | 2016-09-29 | Active discharge circuit for filter capacitor of electric automobile controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106357101A true CN106357101A (en) | 2017-01-25 |
Family
ID=57866957
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610870915.7A Pending CN106357101A (en) | 2016-09-29 | 2016-09-29 | Active discharge circuit for filter capacitor of electric automobile controller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106357101A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107888062A (en) * | 2017-11-02 | 2018-04-06 | 湖北三江航天万峰科技发展有限公司 | A kind of high-power corona discharge devices |
| CN108462386A (en) * | 2017-12-28 | 2018-08-28 | 武汉合康动力技术有限公司 | Digital quantity controls analog switch the control circuit of chip in a kind of power-supply system |
| CN110722988A (en) * | 2018-06-28 | 2020-01-24 | 长城汽车股份有限公司 | Discharge control circuit and initiative discharge circuit of electric capacity in machine controller |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102025272A (en) * | 2009-09-17 | 2011-04-20 | 富士迈半导体精密工业（上海）有限公司 | Discharging circuit |
| KR20110077920A (en) * | 2009-12-30 | 2011-07-07 | 주식회사 동부하이텍 | Scr esd protection circuit |
| US20120262204A1 (en) * | 2011-04-13 | 2012-10-18 | Kabushiki Kaisha Toshiba | Driver circuit having an insulated gate field effect transistor for providing power |
| CN202602274U (en) * | 2012-05-08 | 2012-12-12 | 北京益弘泰科技发展有限责任公司 | Load discharge circuit suitable for power supply system |
-
2016
- 2016-09-29 CN CN201610870915.7A patent/CN106357101A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102025272A (en) * | 2009-09-17 | 2011-04-20 | 富士迈半导体精密工业（上海）有限公司 | Discharging circuit |
| KR20110077920A (en) * | 2009-12-30 | 2011-07-07 | 주식회사 동부하이텍 | Scr esd protection circuit |
| US20120262204A1 (en) * | 2011-04-13 | 2012-10-18 | Kabushiki Kaisha Toshiba | Driver circuit having an insulated gate field effect transistor for providing power |
| CN202602274U (en) * | 2012-05-08 | 2012-12-12 | 北京益弘泰科技发展有限责任公司 | Load discharge circuit suitable for power supply system |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107888062A (en) * | 2017-11-02 | 2018-04-06 | 湖北三江航天万峰科技发展有限公司 | A kind of high-power corona discharge devices |
| CN108462386A (en) * | 2017-12-28 | 2018-08-28 | 武汉合康动力技术有限公司 | Digital quantity controls analog switch the control circuit of chip in a kind of power-supply system |
| CN110722988A (en) * | 2018-06-28 | 2020-01-24 | 长城汽车股份有限公司 | Discharge control circuit and initiative discharge circuit of electric capacity in machine controller |
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| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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| RJ01 | Rejection of invention patent application after publication | ||
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Application publication date: 20170125 |