CN107257192A - A kind of passive electric discharge device and electric machine controller - Google Patents
A kind of passive electric discharge device and electric machine controller Download PDFInfo
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- CN107257192A CN107257192A CN201710356521.4A CN201710356521A CN107257192A CN 107257192 A CN107257192 A CN 107257192A CN 201710356521 A CN201710356521 A CN 201710356521A CN 107257192 A CN107257192 A CN 107257192A
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- Prior art keywords
- passive
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- soft
- electric discharge
- discharge device
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Classifications
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- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
- B60L3/0046—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to electric energy storage systems, e.g. batteries or capacitors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/0092—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption with use of redundant elements for safety purposes
-
- 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
- H02M1/36—Means for starting or stopping converters
-
- 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
- H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
- H02P29/02—Providing protection against overload without automatic interruption of supply
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
Abstract
The invention discloses a kind of passive electric discharge device and electric machine controller, wherein, passive electric discharge device includes：Passive discharge module and soft-start module；Wherein, the passive discharge module is formed in parallel by multiple resistance strings；Also, the passive discharge module is connected in series in the two ends of bus capacitor with soft-start module, the bus capacitor is connected in parallel with high-tension battery, and after high-tension battery disconnection, the bus capacitor voltage is released on passive discharge module.Passively discharged by multiple resistance connection in series-parallel in passive discharge module, and connect and integrate with soft-start module, can both realize passive discharging function, can carry out soft start to circuit again.
Description
Technical field
The present invention relates to electric automobile field, more particularly to a kind of passive electric discharge device and electric machine controller.
Background technology
Currently, in New-energy electric vehicle field, required according to national standard, after high-tension battery disconnection, it is necessary to assure
The passive electric discharge of high pressure is interior at any time to be at effective status, while the energy that must also store bus capacitor is let out rapidly
Put, and ensure that the bus capacitor voltage is less than 120s by the passive electric discharge of bus capacitor by the 450V times for being down to below 60V.
Plug-in type resistance such as gold resistance directly in parallel, ceramic resistor etc. in bus capacitor loop is used in the prior art
Independent loop scheme.And using being by locking gold resistance or pottery by the way of screw the scheme of gold resistance or ceramic resistor
Porcelain resistance is fixed on structure, in the case of ensureing that country or vehicle factory discharge time require, selected resistor power
It is different and radiating mode and fixed form are all variant, there is natural heat dissipation, also have and be close to cooled plate radiating, but be required for
Installed in controller with design technology, the link of screw is locked in increase, and not only cost is high for this scheme, and is unfavorable for automation
Streamline, as following vehicle factory requires electric discharge to improve constantly, bus capacitor voltage is constantly raised, and passive discharge time is continuous
Lengthen, these all bring new puzzlement for existing passive scheme and its parts selection, it is impossible to modularization, once demand is carried
Height, scheme itself is difficult to optimization design, less efficient, structure must also be changed sometimes, it is impossible to which modularization, cost is higher.
And existing passive electric discharge device is all individual devices independently occurs, once there is Single Point of Faliure, i.e., quilt can not be completed
Dynamic discharging function, being thus likely to result in the voltage of bus capacitor can not all release within a very long time, cause to get an electric shock and endanger
Danger；And because its passive electric discharge is continuously effective, always all in heating, existing schemes must independently radiate, independently installed, and
Can only locking wire, it is impossible to automated production；
And existing passive electric discharge device is all than larger, because device own material limitation Oscillation Amplitude is larger, it is in electricity
There is very big failure risk under electrical automobile vibration standard.
For this reason, it is necessary to a kind of new passive electric discharge device be designed, to overcome above mentioned problem.
The content of the invention
The technical problem to be solved in the present invention is that existing passive electric discharge device is single and independently installed, and body
Product is larger, is carried out in view of the shortcomings of the prior art there is provided one kind by multiple small-power resistance connection in series-parallel in passive discharge module
Passive electric discharge, and connect and integrate with soft-start module, passive discharging function can be both realized, circuit can be carried out again
Soft start.
The present invention solves the technical scheme that is used of its problem：
First aspect present invention provides a kind of passive electric discharge device, including：
Passive discharge module and soft-start module；The passive discharge module is formed in parallel by multiple resistance strings；It is described
Passive discharge module is connected in series in the two ends of bus capacitor, also, the bus capacitor and high pressure with the soft-start module
Cell parallel is connected, and after high-tension battery disconnection, the bus capacitor voltage is released on the passive discharge module.
Further, the passive discharge module is in series by multiple resistance groups, and resistance group described in each of which is at least
It is made up of two resistor coupled in parallel.
Further, the soft-start module includes：
Soft start capacitor and soft start voltage-stabiliser tube, the soft start capacitor are connected in parallel with the soft start voltage-stabiliser tube.
Further, the passive electric discharge device also includes backup battery module, the backup battery module two ends difference
Connect the two ends of the bus capacitor.
Further, the backup battery module includes：Inverse-excitation type voltage transformation unit and integrated circuit IC elements, the flyback
One end of the primary side winding of formula voltage transformation unit is connected to the bus capacitor, and the other end is connected to the first controlled end of switching tube,
And the second controlled end and control end of the switching tube are connected to the integrated circuit IC elements, the integrated circuit IC elements
Control the conducting of the primary side winding of the inverse-excitation type voltage transformation unit.
Further, the integrated circuit IC elements are connected in soft start capacitor described in the soft-start module in parallel
Two ends.
Further, the high-tension battery disconnection after the bus capacitor voltage in object time T by first voltage
U1 is down to second voltage U2, and the object time T, the first voltage U1 and the second voltage U2 meet following public
Formula：
U2=U1*exp (- T/RCmax)；
Wherein, the R is the resistance of the passive discharge module, and the Cmax is the capacitance of the bus capacitor.
Further, the passive discharge module and soft-start module are integrated in same circuit board.
Further, the soft-start module also includes：Parallel resistance and shunt capacitance, the parallel resistance and institute
Shunt capacitance is stated to be connected in parallel with the soft start capacitor and the soft start voltage-stabiliser tube respectively.
Second aspect of the present invention provide a kind of electric machine controller, including be connected to the high-tension battery dc bus,
Passive electric discharge device described in the bus capacitor being connected between the dc bus and above-mentioned first aspect.
Compared with prior art, implement the embodiment of the present invention, have the advantages that：
In the embodiment of the present invention, passive electric discharge device includes：Passive discharge module and soft-start module；Wherein, the quilt
Dynamic discharge module is formed in parallel by multiple resistance strings；Also, the passive discharge module is connected in series in bus with soft-start module
The two ends of electric capacity, the bus capacitor is connected in parallel with high-tension battery, and after high-tension battery disconnection, the bus capacitor voltage is passive
Released on discharge module.It follows that passively being discharged by multiple resistance connection in series-parallel in passive discharge module, and opened with soft
Dynamic block coupled in series is integrated, and can both realize passive discharging function, can carry out soft start to circuit again.
Brief description of the drawings
Fig. 1 is a circuit diagram of passive electric discharge device in the embodiment of the present invention；
Fig. 2 is a circuit diagram of passive discharge module in the embodiment of the present invention；
Fig. 3 is a circuit diagram of soft-start module in the embodiment of the present invention；
Fig. 4 is another circuit diagram of passive electric discharge device in the embodiment of the present invention.
Embodiment
In order to which technical characteristic, purpose and effect to the present invention are more clearly understood from, now compare accompanying drawing and describe in detail
The embodiment of the present invention.Obviously, described embodiment is only a part of embodiment of the invention, rather than whole
Embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art are obtained under the premise of creative work is not made
The every other embodiment obtained, belongs to the scope of protection of the invention.
As shown in figure 1, the embodiments of the invention provide a kind of passive electric discharge device, including：
Passive discharge module 1 and soft-start module 2；
The passive discharge module 1 and soft-start module 2 are cascaded, and are connected to bus capacitor Cbus two ends, wherein, should
Passive discharge module 1 can be connected to bus capacitor Cbus HVDC (High Voltage Direct Current,
HVDC) positive pole one end, i.e., HVDC+ ends shown in Fig. 1；The soft-start module 2 can be connected to bus capacitor Cbus high straightening
Flow negative pole one end, i.e., HDDC- ends shown in Fig. 1.However, it is necessary to which explanation, above-mentioned connection plan is used as the embodiment of the present invention
In example, it should not constitute limitation of the invention, and the passive discharge module 1 can also be connected to bus capacitor
HVDC- ends, the soft-start module 2 can also be connected to bus capacitor HVDC+ ends, not limit herein specifically.
Also, as shown in figure 1, bus capacitor Cbus can and be connected on the two ends of high-tension battery, in bus capacitor
When being connected between Cbus and high-tension battery, the high-tension battery charges to bus capacitor Cbus, and after high-tension battery disconnection,
Bus capacitor Cbus can be let out using the voltage stored by the quick bus capacitor Cbus of passive discharge module 1 being attached thereto
Put.
As shown in figure 1, the passive discharge module 1 can be made up of multiple small-power resistance connection in series-parallel, above-mentioned small-power
The number of resistance is no less than 3.Also, above-mentioned small-power resistance can be the Chip-R that power is 0.125W~0.4W.It is above-mentioned
The connection in series-parallel annexation of small-power resistance can be with as shown in figure 1, be carried out in Fig. 1 using 3 resistance (R1, R2 and R3) as example
Explanation：Resistance R2 and R3 are in parallel, and are connected on and link together with resistance R1.
It should be noted that in actual applications, the passive discharge module 1 can be in series by multiple resistance groups, its
In each resistance group can be at least made up of two resistor coupled in parallel.For example：As shown in Fig. 2 the plurality of resistance group can be by
The resistance group that the resistance group series connection that R11 to R18 is constituted is made up of R19 to R27, wherein being connected by R11 resistance group one end constituted
Bus capacitor Cbus HVDC+ ends are connect, and R11 parallel connections R12 electricity can be divided into the resistance group being made up of R11 to R18
Resistance group, R13 parallel connections R14 resistance group, R15 parallel connections R16 resistance group and R17 parallel connections R18 resistance group, and above-mentioned four groups
Resistance group is sequentially connected in series；And the resistance group that should be made up of R19 to R27 can be divided into R19, R20 and R21 resistance in parallel
Group, resistance group R22, R23 and R24 in parallel, and R25, R26 and R27 resistance group in parallel, three groups of resistance groups are sequentially connected in series
Connection.
It should be noted that in the embodiment of the present invention, for so that bus capacitor Cbus electricity after high-tension battery disconnection
Pressure is quickly released using the passive discharge module 1, and according to national standard, bus capacitor Cbus voltage is down into below 60V
Time be less than 120s, it is known that：
In bus capacitor Cbus maximum capacitor Cmax=500uF, during ceiling voltage HVDCmax=450V, in high-tension electricity
, it is necessary to which bus capacitor Cbus voltage is released to below safe voltage 60V after pond disconnects, its energy discharged is：
And in the passive discharge process, time constant is：τ=RCmax, R is the resistance size of the passive discharge module 1.
As T=120s, bus capacitor Cbus voltage is put into 60V, then can be according to below equation：
U60=U450·exp(-T/τ) (2)；
What can be calculated arrives R=119.2k Ω, can actually choose R=110k Ω.It is understood that in actual use
In, if it is desired to passive discharge time is met less than 120s, then the resistance R of the passive discharge module 1 needs to be less than what is calculated
Value can just meet demand.
So the voltage that cause bus capacitor Cbus is down to second voltage U2 in object time T by first voltage U1,
Then need to meet below equation：
U2=U1*exp (- T/RCmax) (3).
As shown in figure 1, the soft-start module 2 can include soft start capacitor C1 and soft start voltage-stabiliser tube D1, and
In the soft-start module 2, soft start capacitor C1 can be connected in parallel with soft start voltage-stabiliser tube D1, soft start capacitor C1 sun
It can be extremely connected with soft start voltage-stabiliser tube D1 anode.Soft start capacitor C1 can be electrochemical capacitor.
Also, in the soft-start module 2, soft start capacitor C1 negative electrode can connect filter inductance and meet HVDC-
End.In the soft-start module 2, in parallel between soft start capacitor C1 and soft start voltage-stabiliser tube D1 it can also increase electricity in parallel
R4 and shunt capacitance C2 is hindered, as shown in figure 3, wherein, parallel resistance R4 can be divided the electric current in the soft-start module 2
Stream, by adjusting parallel resistance R4 size, can control the electric current flowed through in the soft-start module 2 on each parallel circuit
Size；Shunt capacitance C2 can be filtered to the circuit in the soft-start module 2, stablize soft-start module output
Voltage, also, relative to soft start capacitor C1, shunt capacitance C2 can be small capacitances, then soft start capacitor C1 is then big
(electric capacity in practical application more than 1uF is mostly electrochemical capacitor to electric capacity, therefore soft start capacitor can be with prioritizing selection in the present embodiment
Electrochemical capacitor).Lead to low frequency using bulky capacitor soft start capacitor C1, small capacitances shunt capacitance C2 leads to high frequency, it is possible to achieve filtering
Function.Do not limited in soft start capacitor C1 and shunt capacitance C2 specific capacitance the present embodiment, and electric capacity C2 can
With Ceramics electric capacity.
As shown in figure 1, in the present invention, the passive electric discharge device can also include backup battery module 3, should, the backup
The two ends of power module 3 can be connected respectively at bus capacitor Cbus two ends, and comprising inverse-excitation type in the backup battery 3
Voltage transformation unit and IC (Integrated Circuit).
The inverse-excitation type voltage transformation unit is made up of primary side winding L1, vice-side winding L2 and flyback winding L3.Wherein, the primary side
Winding L1 one end can be connected with bus capacitor Cbus HVDC+ ends, and another side then can be controlled with the first of connecting valve pipe M
Hold (such as metal-oxide-semiconductor drain), switching tube M can be MOS (Metal Oxide Semiconductor, metal-oxide-half
Conductor) manage or other FETs, do not limit herein specifically.Also, switching tube M control end (such as MOS
Tube grid) it can be connected with IC, it is second controlled that the IC can also connect HVDC- ends in switching tube M
End (metal-oxide-semiconductor source electrode) is attached thereto, so as to realize the control to switching tube M.
Vice-side winding L2 can be connected to the diode D3 of Unidirectional flow-limiting with one end, and the other end can be with ground wire GND
(Ground) end or HVDC- ends., can by primary side winding L1 and vice-side winding L2 when switching tube M is connected
So that the HVDC in bus capacitor is converted into low-voltage direct, and exported by vice-side winding L2 two ends.
Flyback winding L3 will can be stored when switching tube M is connected by the primary side winding L1 inductance changed,
And when switching tube M is turned off, the inductance stored is converted into electrical energy transportation into soft-start module 2.The counterattack winding
L3 one end can be connected with diode D2 negative electrode, and the other end can then connect HVDC- ends.Also, diode D2 anode
It can be connected on the circuit that soft-start module 2 is connected with passive discharge module 1.
And the IC, it can be used for the conducting for controlling the inverse-excitation type voltage transformation unit in the backup battery module 3,
Can be specifically that it does not only have two stitch and is connected with switching tube M, and can also be connected in parallel on soft open in the presence of two stitch
The two ends of soft start capacitor C1 in dynamic model block 2, when the voltage in soft start capacitor C1 reaches VDD, the IC
Switching tube M connection can be controlled, so as to realize the conducting for controlling the inverse-excitation type voltage transformation unit.It is understood that the electricity
Pressure VDD can be the startup voltage of the IC.
It should be noted that in embodiments of the present invention, in backup battery 3 normal work of module, it can also be waited
Imitate as a resistance, resistance RL as shown in Figure 4, when the backup battery module 3 is equivalent to resistance RL, it can be with equivalent
It is connected in bus capacitor Cbus two ends in parallel, it can also be equivalent to a passive discharge resistance.
Also, during some resistance failure in passive discharge module 1, due to there is this equivalent electric of backup battery module 3
The presence of resistance, some resistance failure that can be effectively reduced in the passive discharge module 1 is passive to passive electric discharge device of the invention
The influence of discharge time, in the range of its equivalent equivalent resistance, when ensure that the passive electric discharge of the passive electric discharge device
Between control in national standard, passive discharge resistance failure in the prior art will not be caused to cause passive discharge scheme to lose completely
Effect, and may also speed up the passive velocity of discharge of the passive electric discharge device.
Also, in embodiments of the present invention, the passive discharge module 1 can also be integrated in same with the soft-start module 2
On block circuit board, without separately installed, and it is easy to automated production, while optimization technological process, the passive electric discharge
Module 1 can also be equivalent to protect the soft start resistance of the circuit of soft-start module 2.And in bus capacitor Cbus HVDC
After turning low-voltage direct by the soft start-up process of soft-start module 2, without disconnecting the equivalent soft start resistance, i.e., this is passively put
Electric module 1, the passive discharge module 1 can continue to carry out bus capacitor Cbus lasting passive electric discharge.
In summary, the embodiments of the invention provide a kind of passive electric discharge device, passive electric discharge in the prior art is solved
Device is single and independently installed, and the larger shortcoming of volume utilizes multiple small-power resistance connection in series-parallel to enter there is provided one kind
The passive electric discharge device that row passively discharges, by being connected with soft-start module, can both realize passive discharging function, again can be right
Circuit carries out soft start.
A kind of electric machine controller is additionally provided in the embodiment of the present invention, including is connected to the dc bus of high-tension battery, connects
The bus capacitor that is connected between the dc bus and such as above-mentioned Fig. 1 to the passive electric discharge device disclosed in Fig. 4, specifically herein
Do not repeat.
Embodiments of the invention are described above in conjunction with accompanying drawing, but the invention is not limited in above-mentioned specific
Embodiment, above-mentioned embodiment is only schematical, rather than restricted, one of ordinary skill in the art
Under the enlightenment of the present invention, in the case of present inventive concept and scope of the claimed protection is not departed from, it can also make a lot
Form, these are belonged within protection scope of the present invention.
Claims (10)
1. a kind of passive electric discharge device, it is characterised in that including passive discharge module and soft-start module；The passive electric discharge
Module is formed in parallel by multiple resistance strings；The passive discharge module is connected in series in bus capacitor with the soft-start module
Two ends, also, the bus capacitor is connected in parallel with high-tension battery, after high-tension battery disconnection, the bus capacitor electricity
It is pressed on the passive discharge module and releases.
2. passive electric discharge device according to claim 1, it is characterised in that the passive discharge module is by multiple resistance groups
It is in series, resistance group described in each of which is at least made up of two resistor coupled in parallel.
3. passive electric discharge device according to claim 1, it is characterised in that the soft-start module includes：
Soft start capacitor and soft start voltage-stabiliser tube, the soft start capacitor are connected in parallel with the soft start voltage-stabiliser tube.
4. passive electric discharge device according to claim 1, it is characterised in that the passive electric discharge device also includes backup electricity
Source module, the backup battery module two ends connect the two ends of the bus capacitor respectively.
5. passive electric discharge device according to claim 4, it is characterised in that the backup battery module includes：Inverse-excitation type
Voltage transformation unit and integrated circuit IC elements, one end of the primary side winding of the inverse-excitation type voltage transformation unit are connected to the bus electricity
Hold, the other end is connected to the first controlled end of switching tube, and the second controlled end and control end of the switching tube are connected to institute
Integrated circuit IC elements are stated, the integrated circuit IC elements control the conducting of the primary side winding of the inverse-excitation type voltage transformation unit.
6. passive electric discharge device according to claim 5, it is characterised in that the integrated circuit IC elements are connected in parallel
The two ends of soft start capacitor described in the soft-start module.
7. passive electric discharge device according to claim 1, it is characterised in that the bus after high-tension battery disconnection
Capacitance voltage is down to second voltage U2, and the object time T, the first voltage in object time T by first voltage U1
U1 and the second voltage U2 meet below equation：
U2=U1*exp (- T/RCmax)；
Wherein, the R is the resistance of the passive discharge module, and the Cmax is the capacitance of the bus capacitor.
8. passive electric discharge device according to claim 1, it is characterised in that the passive discharge module and soft-start module
It is integrated in same circuit board.
9. passive electric discharge device according to claim 3, it is characterised in that the soft-start module also includes：Electricity in parallel
Resistance and shunt capacitance, the parallel resistance and the shunt capacitance respectively with the soft start capacitor and the soft start
Voltage-stabiliser tube is connected in parallel.
10. a kind of electric machine controller, it is characterised in that described in being connected to the dc bus of the high-tension battery, being connected to
The bus capacitor between dc bus and the passive electric discharge device as described in any one of claim 1 to 8.
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| CN201710356521.4A CN107257192A (en) | 2017-05-19 | 2017-05-19 | A kind of passive electric discharge device and electric machine controller |
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| CN201710356521.4A CN107257192A (en) | 2017-05-19 | 2017-05-19 | A kind of passive electric discharge device and electric machine controller |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109742933A (en) * | 2019-01-22 | 2019-05-10 | 浙江众邦机电科技有限公司 | A kind of motor driven systems and its auxiliary power-off system |
| CN110932540A (en) * | 2019-12-23 | 2020-03-27 | 广东宝星新能科技有限公司 | Low-cost isolated bus soft start circuit applied to UPS |
| CN113071317A (en) * | 2021-03-23 | 2021-07-06 | 浙江吉利控股集团有限公司 | Discharging circuit, method, motor controller and electric automobile |
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| CN205594473U (en) * | 2015-12-03 | 2016-09-21 | 中国航空工业集团公司雷华电子技术研究所 | Take fan protection circuit of control by temperature change and soft start function |
| CN205566096U (en) * | 2016-02-23 | 2016-09-07 | 西安唯电电气技术有限公司 | High voltage direct current wide region input power auxiliary power supply circuit |
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| CN109742933A (en) * | 2019-01-22 | 2019-05-10 | 浙江众邦机电科技有限公司 | A kind of motor driven systems and its auxiliary power-off system |
| CN110932540A (en) * | 2019-12-23 | 2020-03-27 | 广东宝星新能科技有限公司 | Low-cost isolated bus soft start circuit applied to UPS |
| CN113071317A (en) * | 2021-03-23 | 2021-07-06 | 浙江吉利控股集团有限公司 | Discharging circuit, method, motor controller and electric automobile |
| CN113071317B (en) * | 2021-03-23 | 2022-08-02 | 浙江吉利控股集团有限公司 | Discharging circuit, method, motor controller and electric automobile |
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Application publication date: 20171017 |