CN106655372A - Active discharge control circuit of motor controller of electric vehicle and controller - Google Patents
Active discharge control circuit of motor controller of electric vehicle and controller Download PDFInfo
- Publication number
- CN106655372A CN106655372A CN201611170137.7A CN201611170137A CN106655372A CN 106655372 A CN106655372 A CN 106655372A CN 201611170137 A CN201611170137 A CN 201611170137A CN 106655372 A CN106655372 A CN 106655372A
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- discharge
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- igct
- circuit
- ignition switch
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- 239000003990 capacitor Substances 0.000 claims abstract description 10
- 238000001514 detection method Methods 0.000 claims description 15
- 238000000465 moulding Methods 0.000 claims description 2
- 238000007599 discharging Methods 0.000 abstract 2
- 230000005611 electricity Effects 0.000 description 7
- 230000002159 abnormal effect Effects 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other DC sources, e.g. providing buffering
- H02J7/345—Parallel operation in networks using both storage and other DC sources, e.g. providing buffering using capacitors as storage or buffering devices
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
- H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
- H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using DC to AC converters or inverters
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention provides an active discharge control circuit of a motor controller of an electric vehicle and the controller, and aims to solves the conditions that burden of the controller is increased and torque abnormity, rotary speed abnormity, discharge failure and other abnormity conditions are easily caused in a discharging mode by adopting an inversion unit in the prior art. The active discharge control circuit of the motor controller of the electric vehicle comprises a discharge main circuit and a discharge control circuit; the discharge main circuit comprises a discharge resistor R1 and a thyristor VT1 which are connected in series; and the motor controller of the electric vehicle comprises a high-voltage storage battery, an inversion circuit, a low-voltage power supply circuit, a low-voltage storage battery, a direct current capacitor Cdc, an ignition switch ON, a discharge main circuit and a low-voltage control unit. By adoption of the mode that the discharge resistor and the thyristor are connected in series, the burden of the inversion unit and the control program are relieved compared with the mode of discharging by adopting the inversion unit; and active discharge still can be ensured in failure of the inversion unit, so that reliability is improved.
Description
Technical field
The present invention relates to electric vehicle motor controller electric capacity electric discharge field, more particularly to a kind of control of motor in electric automobile
Device active discharge control circuit and controller.
Background technology
The high voltage direct current of electrokinetic cell on electric automobile is passed through three-phase inverting circuit by the main realization of electric machine controller
Be converted to three-phase alternating current and provide power supply for motor, and then the operation for automobile provides power.Electric machine controller mainly includes pre-
Charging circuit, dc-link capacitance, inverter circuit, low-voltage control circuit, low-voltage power supply circuit.Pre-charge circuit is electrokinetic cell
When being switched to dc bus, in advance the dc-link capacitance to being connected in parallel on dc bus is charged, so as to avoid big wave
Gush electric current.Dc-link capacitance reduces the ripple voltage that the switching device in inverter circuit is produced in frequent movement.Inversion electricity
Road then completes DC voltage to the conversion of three-phase alternating current.The function of low-voltage control circuit is that whole electric machine controller is monitored and controlled
Working condition, logic and the communication with external equipment.Charge/discharge control circuit is used for dc-link capacitance residual charge of releasing.It is low
The source of pressure power supply circuits low-tension supply for needed for whole controller inside, when automobile ignition switch ON is connected, low-voltage power supply
Circuit works.
There is jumbo dc-link capacitance in the electric machine controller of electric automobile, after ignition switch ON disconnects, electricity
Machine controller loses low-tension supply, and inverter circuit is connected with electrokinetic cell also disconnecting circuit.Dc-link capacitance is because be energy storage
Device, after inverter circuit and electrokinetic cell are disconnected, remains high pressure on dc bus, will still have a large amount of electric charges,
If without outside discharge circuit, the electric charge on dc-link capacitance will be remained for a long time, after artificial opening cover
There is careless manipulation and the person gets an electric shock or causes electric conductor to contact with each other and cause component damage.
In existing active discharge control system, electric discharge uses inverter, the monitoring of active discharge control unit, judgement
There is module and produce discharge waveform in the state of inverter, PWM, drive inverter to discharge dc-link capacitance, work as bus
After voltage drop to a certain extent on electric capacity, the control circuit of inverter will power down, active discharge strategy quits work, entirely
End-of-job.In whole process, the power supply circuits of active discharge control unit work as igniting from electric automobile ignition switch ON
After when switch ON disconnects, the low-voltage power supply of electric machine controller just no longer takes from ignition switch ON, if without other power supplies
Source, the data processing chip in active discharge control unit will instant power-down, will then cause data to be able to do in time
Preserve or other rough sledding, bus capacitor also just cannot discharge.Therefore, existing scheme is adopted after the disconnection of ignition switch ON
High-tension electricity on bus capacitor is converted into into low tension, thus continues to power active discharge control unit, realize ignition switch
ON keeps low-voltage power supply to preserve with the data for completing digital processing chip for a period of time and put to dc-link capacitance after disconnecting
The functions such as electricity.Because inversion unit is used as motor-driven important component part, there is vital impact on traffic safety,
The burden that active discharge has increased controller is carried out using inversion unit, abnormal moment of torsion, rotating speed exception, discharge failure easily occurs
Etc. abnormal conditions.
The content of the invention
The invention provides a kind of electric vehicle motor controller active discharge control circuit and controller, it is intended to solve existing
There is inversion unit used in technology to be discharged, increased the burden of controller, abnormal moment of torsion, rotating speed exception easily occur, put
The electricity abnormal conditions such as unsuccessfully.
In order to solve above technical problem, the present invention is achieved through the following technical solutions：
A kind of electric vehicle motor controller active discharge control circuit, including electric discharge main circuit and charge/discharge control circuit；
Electric discharge main circuit includes discharge resistance R1 and the IGCT VT1 being cascaded；Charge/discharge control circuit includes control of discharge module
With ignition switch ON signal detection branch road；The outfan of ignition switch ON signal detection branch road is connected with control of discharge module；Put
Electric control module is connected with IGCT VT1 and controls the switch of IGCT VT1.
A kind of electric vehicle motor controller, including high tension battery, inverter circuit, low-voltage power supply circuit, low pressure electric power storage
Pond, DC capacitor Cdc, ignition switch ON, electric discharge main circuit and low voltage control unit.Inverter circuit includes inverter, positive direct-current
Bus and negative dc bus, inverter is connected by positive direct-current bus with the positive pole of high tension battery, and inverter is by bearing direct current
Bus is connected with the negative pole of high tension battery.DC capacitor Cdc is connected between positive direct-current bus and negative dc bus.Electric discharge master
It is female that circuit includes that the discharge resistance R1 being cascaded and IGCT VT1, discharge resistance R1 and IGCT VT1 are connected to positive direct-current
Between line and negative dc bus.Low tension battery is powered by low-voltage power supply circuit to low voltage control unit, and ignition switch ON sets
The switch of low-voltage power supply circuit is put on low-voltage power supply circuit and controlled, is provided with a little between low voltage control unit and ignition switch ON
Fire switch ON signal detection branch roads.Low voltage control unit is connected with IGCT VT1 and controls the switch of IGCT VT1.
Further, controller also includes relay, and relay is arranged on positive direct-current bus and near high tension battery
Outfan.
Further, low voltage control unit includes control of discharge module, and ignition switch ON signal detection branch road is arranged on electric discharge
Between control module and ignition switch ON, control of discharge module is connected with IGCT VT1 and controls the switch of IGCT VT1.
Control of discharge module is a part for low voltage control unit, is easy to that existing active discharge control circuit directly should
For existing electric vehicle motor controller, simple possible, low cost.
Compared with prior art it is an advantage of the invention that：
1st, the present invention is compared and discharged using inversion unit by the way of Thyristors in series discharge resistance, is alleviated
The burden of inversion unit and control program, remains to ensure active discharge when inversion unit fails, and increased reliability.
2nd, compare and discharged using inversion unit, alleviate the burden of controller, active discharge is without considering inversion unit
Work-based logic, reduces monitoring unit, designs simpler.IGCT in the present invention requires control circuit simple, gate pole electricity
Stream reaches and only need to after threshold values holding load current continuation flowing, without persistently giving trigger, controls simple and convenient.
3rd, present low-voltage power supply mode is compared after the disconnection of ignition switch ON, low pressure etc. is transformed into using DC bus-bar voltage
Mode, present invention power supply is directly controlled by ignition switch ON signal, need not power after ignition switch ON invalidating signal.
4th, the existing power supply of electric machine controller inversion control unit and the low-tension supply of master control borad are closed in ignition switch ON
DC bus-bar voltage is taken from after closing, then by the voltage conversion circuit for loading, high pressure is converted into into suitable inversion and is driven electricity
Pressure and master control borad supply voltage, are that inversion and master control borad provide power supply.IGCT only needs to a given low pressure and touches in the present invention
Signal, without the need for persistently giving control signal, without the need for the conversion of high pressure to low pressure.
5th, existing active discharge scheme fails in inversion unit failure, if now motor still operating, can produce compared with
High inverse electromotive force, it is unfavorable to whole electric machine control system.In the present invention, the IGCT electric discharge of employing, equivalent to extra increasing
Plus one and ensure again, remain to be normally carried out electric discharge when for inversion unit timeliness.
Description of the drawings
In order to be illustrated more clearly that the technical scheme of the embodiment of the present invention, below will be attached to what is used needed for embodiment
Figure is briefly described, it will be appreciated that the following drawings illustrate only certain embodiments of the present invention, therefore be not to be taken as to model
The restriction enclosed, for those of ordinary skill in the art, on the premise of not paying creative work, can be with according to these
Accompanying drawing obtains other related accompanying drawings.
Fig. 1 is electric vehicle motor controller structural representation in the present invention.
Specific embodiment
In describing the invention, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ",
Terms such as " fixations " should be interpreted broadly, for example, it may be fixedly connected, or be detachably connected, or it is integral；Can be with
It is to be mechanically connected, or electrically connect；Can be directly connected to, or be indirectly connected to by intermediary, Ke Yishi
The connection of two element internals or the interaction relationship of two elements.For those of ordinary skills, can be with root
Understand above-mentioned term concrete meaning in the present invention according to concrete condition.
Embodiment one：
Refering to Fig. 1, a kind of electric vehicle motor controller active discharge control circuit, including electric discharge main circuit and electric discharge control
Circuit processed；Electric discharge main circuit includes discharge resistance R1 and the IGCT VT1 being cascaded；Charge/discharge control circuit includes electric discharge control
Molding block and ignition switch ON signal detection branch road；The outfan of ignition switch ON signal detection branch road and control of discharge module phase
Even；Control of discharge module is connected with IGCT VT1 and controls the switch of IGCT VT1.Control of discharge module is processor.
Following processors are control of discharge module, and ON signal detection schemes have following two modes：
The first：If detection needs isolation, need signal between ON signals and processor with isolating devices such as optocouplers
Deliver to processor.Judged the state of ON signals by processor again.
Second：If detection need not be isolated, ON signals can be delivered to into processor through simple level conversion.Again
The state of ON signals is judged by processor.
Embodiment two：
Refering to Fig. 1, a kind of electric vehicle motor controller, including high tension battery, low-voltage power supply circuit, inverter circuit,
Low tension battery, DC capacitor Cdc, ignition switch ON, electric discharge main circuit and low voltage control unit.
Inverter circuit includes inverter, positive direct-current bus and negative dc bus, and inverter is by positive direct-current bus and high pressure
The positive pole of accumulator is connected, and inverter is connected by negative dc bus with the negative pole of high tension battery.DC capacitor Cdc is connected to
Between positive direct-current bus and negative dc bus.Electric discharge main circuit includes discharge resistance R1 and the IGCT VT1 being cascaded, and puts
Resistance R1 and IGCT VT1 are connected between positive direct-current bus and negative dc bus.
Low tension battery is powered by low-voltage power supply circuit to low voltage control unit, and ignition switch ON is arranged on low-voltage power supply
On circuit and the switch of low-voltage power supply circuit is controlled, ignition switch ON signal is provided between low voltage control unit and ignition switch ON
Detection branch.Low voltage control unit is connected with IGCT VT1 and controls the switch of IGCT VT1.Low voltage control unit includes putting
Electric control module, ignition switch ON signal detection branch road is arranged between control of discharge module and ignition switch ON, control of discharge
Module is connected with IGCT VT1 and controls the switch of IGCT VT1.Low voltage control unit is processor.
Controller also include relay K1 and relay K2, relay K1 and relay K2 be arranged on positive direct-current bus and
Near the outfan of high tension battery, relay K2 is in series with parallel with K1 after resistance R2.
Below in conjunction with the accompanying drawings the operation principle of 1 couple of present invention is further illustrated：
Original state, relay K1, K2 when electric automobile ignition switch ON is connected, that is, light a fire all in separated position
Switch ON closures, now low tension battery is powered by low-voltage power supply circuit to low voltage control unit.
After electric automobile stops, ignition switch ON disconnects, and low voltage control unit detects ON blackouts, to IGCT
VT1 sends active discharge trigger, turns on IGCT VT1, and IGCT VT1, discharge resistance R1 and DC capacitor Cdc are formed
The discharge loop of one closure, the electric charge on DC capacitor Cdc discharges rapidly, and voltage is dropped to below safe voltage, and voltage declines
Time t1 together decided on by resistance R1 resistances, electric capacity Cdc capacity and electric capacity Cdc initial voltages.Make what VT1 was turned on due to sending
Energy very little required for active discharge trigger, after this strategy execution, the energy that low-voltage power supply circuit inside is kept in
It is not enough to continue as low-voltage control circuit to power, low voltage control unit terminates already at power down closed mode, discharge process.
The specific embodiment of the present invention is the foregoing is only, but the technical characteristic of the present invention is not limited thereto, Ren Heben
The technical staff in field in the field of the invention, all cover among the scope of the claims of the present invention by the change or modification made.
Claims (4)
1. a kind of electric vehicle motor controller active discharge control circuit, is characterized in that：Including electric discharge main circuit and electric discharge control
Circuit processed；Electric discharge main circuit includes discharge resistance R1 and the IGCT VT1 being cascaded；Charge/discharge control circuit includes electric discharge control
Molding block and ignition switch ON signal detection branch road；The outfan of ignition switch ON signal detection branch road and control of discharge module phase
Even；Control of discharge module is connected with IGCT VT1 and controls the switch of IGCT VT1.
2. a kind of electric vehicle motor controller, is characterized in that：Including high tension battery, inverter circuit, low tension battery, direct current
Electric capacity Cdc, ignition switch ON, low-voltage power supply circuit, electric discharge main circuit and low voltage control unit；
Inverter circuit includes inverter, positive direct-current bus and negative dc bus, and inverter is by positive direct-current bus and high voltage electric storage
The positive pole in pond is connected, and inverter is connected by negative dc bus with the negative pole of high tension battery；
DC capacitor Cdc is connected between positive direct-current bus and negative dc bus；
Electric discharge main circuit includes that the discharge resistance R1 being cascaded and IGCT VT1, discharge resistance R1 are connected with IGCT VT1
Between positive direct-current bus and negative dc bus；
Low tension battery is powered by low-voltage power supply circuit to low voltage control unit, and ignition switch ON is arranged on low-voltage power supply circuit
The switch of low-voltage power supply circuit is gone up and controlled, ignition switch ON signal detection is provided between low voltage control unit and ignition switch ON
Branch road；
Low voltage control unit is connected with IGCT VT1 and controls the switch of IGCT VT1.
3. a kind of electric vehicle motor controller according to claim 2, is characterized in that：Controller also includes relay,
Relay is arranged on positive direct-current bus and near the outfan of high tension battery.
4. a kind of electric vehicle motor controller according to claim 2, is characterized in that：Low voltage control unit includes electric discharge
Control module, ignition switch ON signal detection branch road is arranged between control of discharge module and ignition switch ON, control of discharge mould
Block is connected with IGCT VT1 and controls the switch of IGCT VT1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611170137.7A CN106655372A (en) | 2016-12-16 | 2016-12-16 | Active discharge control circuit of motor controller of electric vehicle and controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611170137.7A CN106655372A (en) | 2016-12-16 | 2016-12-16 | Active discharge control circuit of motor controller of electric vehicle and controller |
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| Publication Number | Publication Date |
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| CN106655372A true CN106655372A (en) | 2017-05-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611170137.7A Pending CN106655372A (en) | 2016-12-16 | 2016-12-16 | Active discharge control circuit of motor controller of electric vehicle and controller |
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| Country | Link |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110228395A (en) * | 2019-06-14 | 2019-09-13 | 上海蔚来汽车有限公司 | Two-supply circuit system |
| CN112297845A (en) * | 2019-07-31 | 2021-02-02 | 比亚迪股份有限公司 | Power supply control system and method and vehicle |
| FR3144435A1 (en) * | 2022-12-21 | 2024-06-28 | Valeo India Private Limited | Electrical architecture comprising an inverter powering a rotating electrical machine |
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| CN102856985A (en) * | 2011-06-29 | 2013-01-02 | 福特全球技术公司 | Method and apparatus for charging or discharging an electrical device |
| CN102957186A (en) * | 2011-08-12 | 2013-03-06 | 马涅蒂-马瑞利公司 | Discharge device and discharge method to actively discharge capacitor used in electric power system of electric drive vehicle |
| CN104393586A (en) * | 2014-12-04 | 2015-03-04 | 安徽巨一自动化装备有限公司 | Capacitor active discharge circuit of motor controller for electric automobile |
| CN204452098U (en) * | 2014-12-19 | 2015-07-08 | 北汽福田汽车股份有限公司 | The control system of electronlmobil middle controller |
| CN104935219A (en) * | 2015-06-03 | 2015-09-23 | 深圳市航盛电子股份有限公司 | Electric car motor controller active discharge control circuit |
| CN206471857U (en) * | 2016-12-16 | 2017-09-05 | 成都雅骏新能源汽车科技股份有限公司 | Electric vehicle motor controller active release electric control circuit and controller |
-
2016
- 2016-12-16 CN CN201611170137.7A patent/CN106655372A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102856985A (en) * | 2011-06-29 | 2013-01-02 | 福特全球技术公司 | Method and apparatus for charging or discharging an electrical device |
| CN102957186A (en) * | 2011-08-12 | 2013-03-06 | 马涅蒂-马瑞利公司 | Discharge device and discharge method to actively discharge capacitor used in electric power system of electric drive vehicle |
| CN104393586A (en) * | 2014-12-04 | 2015-03-04 | 安徽巨一自动化装备有限公司 | Capacitor active discharge circuit of motor controller for electric automobile |
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| CN206471857U (en) * | 2016-12-16 | 2017-09-05 | 成都雅骏新能源汽车科技股份有限公司 | Electric vehicle motor controller active release electric control circuit and controller |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110228395A (en) * | 2019-06-14 | 2019-09-13 | 上海蔚来汽车有限公司 | Two-supply circuit system |
| CN110228395B (en) * | 2019-06-14 | 2024-04-19 | 上海蔚来汽车有限公司 | Dual power supply circuit system |
| CN112297845A (en) * | 2019-07-31 | 2021-02-02 | 比亚迪股份有限公司 | Power supply control system and method and vehicle |
| CN112297845B (en) * | 2019-07-31 | 2022-05-13 | 比亚迪股份有限公司 | Power supply control system and method and vehicle |
| FR3144435A1 (en) * | 2022-12-21 | 2024-06-28 | Valeo India Private Limited | Electrical architecture comprising an inverter powering a rotating electrical machine |
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Application publication date: 20170510 |