CN105680419B - A kind of electric car start-up course motor rotation blockage self checking method - Google Patents

A kind of electric car start-up course motor rotation blockage self checking method Download PDF

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Publication number
CN105680419B
CN105680419B CN201610132853.XA CN201610132853A CN105680419B CN 105680419 B CN105680419 B CN 105680419B CN 201610132853 A CN201610132853 A CN 201610132853A CN 105680419 B CN105680419 B CN 105680419B
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motor
current
electric
protection
signal
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CN201610132853.XA
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CN105680419A (en
Inventor
杨世春
周帆
李亚伦
崔海港
曹耀光
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Beihang University
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Beihang University
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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
    • H02H7/085—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against excessive load
    • 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
    • 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
    • B60L3/04—Cutting off the power supply under fault conditions
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
    • H02H7/085—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against excessive load
    • H02H7/0852—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against excessive load directly responsive to abnormal temperature by using a temperature sensor
    • 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
    • H02P1/00—Arrangements for starting electric motors or dynamo-electric converters
    • H02P1/16—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters
    • H02P1/26—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters for starting an individual polyphase induction motor
    • 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 electric car start-up course motor rotation blockage self checking method, specifically: after electric car starting powers on, speed probe acquires the tach signal of motor, if motor speed is normal, is not necessarily to power-off protection；If motor fails to rotate, the signal of entire car controller acquisition brake pedal, whether electric car is in on-position at this time for judgement, if braked at this time, without power-off protection, if do not braked, electric machine controller acquires the current signal of current acquisition module output, judge whether the difference of phase current is greater than 10%, if it is greater than 10%, then judge that blocking phenomenon occurs for motor, power-off protection immediately, otherwise, electric machine controller circulation increases dtc signal, and the signal of real-time temperature collection sensor and current sensor, when electric current or temperature are more than predetermined threshold, hard stop power-off protection；The revolving speed of electric machine controller real-time detection speed probe acquisition, after motor runs well, upper electric protection is automatically stopped.

Description

A kind of electric car start-up course motor rotation blockage self checking method
Technical field
The invention belongs to motor in electric automobile control fields, and in particular to the self checking method in a kind of motor start-up procedure.
Background technique
Permanent magnet synchronous motor is due to the advantages that its structure is simple, power density is high, speed-regulating range width, the quilt in electric car It is widely used, realizes the reliable control to motor for electric automobile during traveling safety and reliability important in inhibiting.
Existing motor in electric automobile self-checking unit is usually after disconnecting the connecting line of controller and motor, or replacement The detection carried out after motor or controller, and there is a situation where stall situations to check for motor in electric car start-up course Means are then less.The OBD system that existing motor in electric automobile self-test generally passes through CAN bus checked, the side checked Formula is generally the working order of motor after judgement is powered.This detection method belongs to a kind of detection mode of posteriority, needs pair Motor first power on then provided by its operational situation motor status whether the judgement of failure.In the case of motor rotation blockage, If powered on motor for a long time, it is easy to burn out motor, the operational safety and reliability to electric car cause biggish harm.
The case where stall easily causes motor to burn when to solve electric car starting need to have a kind of pair of motor to carry out stall certainly The method of inspection is to guarantee operational security when electric car starting.
Summary of the invention
There are problems that burning motor there may be motor rotation blockage in motor in electric automobile start-up course, the present invention is mentioned Stall self checking method, controls motor start-up procedure when powering on for a kind of motor, when there is stall situation, increases torque Signal and each phase current of suitable control prevent from burning motor, realize effective control of electric motor starting safety assurance motor, prevented Stream, extends the service life of motor.
A kind of electric car start-up course motor rotation blockage self checking method, comprising the following steps:
After electric car starting powers on, speed probe acquires the tach signal of motor,
If motor speed is normal, motor electrifying startup is normal, is not necessarily to power-off protection；
If motor fails to rotate, entire car controller acquires the signal of brake pedal, and whether electric car is located at this time for judgement In on-position, if braked at this time, it is not necessarily to power-off protection, if do not braked, electric machine controller acquires electric current The current signal of acquisition module output, judges whether the difference of phase current is greater than 10%, if it is greater than 10%, then judges motor Blocking phenomenon, power-off protection immediately, otherwise, electric machine controller circulation increase dtc signal, and in real time temperature collection sensor with And the signal of current sensor, when electric current or temperature are more than predetermined threshold, hard stop power-off protection；
The revolving speed of electric machine controller real-time detection speed probe acquisition, after motor runs well, upper electric protection is automatic Stop.
The present invention has the advantages that
(1) electric car start-up course motor rotation blockage self checking method provided by the invention is simple and reliable, easily controllable；
(2) electric car start-up course motor rotation blockage self checking method provided by the invention using Hall sensor to electric current into Row detection, it is less to the consuming of electric energy；
(3) electric car start-up course motor rotation blockage self checking method process provided by the invention quickly, efficiently, can be effective Management
Detailed description of the invention
Fig. 1: electric car start-up course motor rotation blockage self checking method flow chart of the invention；
Fig. 2: electric car start-up course motor rotation blockage self-checking unit schematic diagram of the present invention；
In figure:
1- brake pedal；2- entire car controller；3- temperature sensor；4- motor；
5- electric machine controller；6- current sensor；7- speed probe
Specific embodiment
The present invention is described in detail with reference to the accompanying drawing.
Motor rotation blockage electric current and starting current are numerically equal, but motor starting currents and locked rotor current continue Time is different, and starting current maximum value appears within the 0.025s after motor powers on, and presses index over time Rule decaying, the rate of decay are related with the time constant of motor；And the passage decaying of the locked rotor current of motor not at any time, and It is to maintain constant.So needing to detect each phase current of motor, using Hall to detect electric motor starting Each phase current of sensor measurement, if stall situation occurs in motor after electrical power, three-phase current will appear unbalanced shape State generally will differ by more than 10% and be considered that three-phase is unbalanced between every biphase current.Therefore the three-phase current of motor is surveyed Amount, if differing by more than 10% between two-phase, it is believed that motor rotation blockage, and increase dtc signal, if after increasing dtc signal, Brake pedal is not stepped on and electric car is still inactive, then quotes failure to driver and prompt to overhaul.
Brake pedal 1 in conventional motors control system, entire car controller 2, temperature sensor 3, motor 4, motor control The main logic relationship of device 5, current sensor 6, speed probe 7 is as shown in Figure 2.
Current sensor 6 is used for each phase current of motor in real time 4, is respectively connected with, will adopt with each phase of three-phase motor 4 The current data collected is sent to electric machine controller 5, and electric machine controller 5 judges between every phase current according to the value of three-phase current Whether difference is greater than 10% and whether is greater than the threshold value of electric current.The present invention is sleeved on motor using Hall sensor element To detect each phase current of motor 4 on the bundle of outputs of controller 5, current signal is then passed into entire car controller 2, vehicle Controller 2 carries out brake pedal signal in judgement and comprehensive entire car controller 2 to electric current, judges whether stall situation occur.
Speed probe 7 is used to detect the revolving speed of motor 4, and after electrifying startup, motor 4 runs well then speed probe 7 Rated speed signal can be passed to electric machine controller 5, motor 4 starts normally, without carrying out power-off protection.
Temperature sensor 3 is used to detect the temperature of motor 4, and temperature value is passed to entire car controller 2, for judging electricity Whether the temperature of machine 4 reaches threshold value, motor 4 can be regarded as if 4 temperature of motor is excessively high stall occurs cutting off the power protection Motor 4.
Entire car controller 2 is used for the brake pedal signal of synthetical collection brake pedal 1, and judges 4 temperature of motor, If 4 temperature of motor is more than threshold value, control signal cut motor 4 is sent to electric machine controller 5 and is powered.
Electric machine controller 5 is for detecting and controlling 4 three-phase current of motor, when the difference between phase current is greater than 10% Think that electric motor starting is abnormal, increase dtc signal at this time and suitably increase motor torque, when current of electric or temperature are greater than door When limit value, cuts off motor power and mistake is quoted by instrument board.
A kind of electric car start-up course motor rotation blockage self checking method of the invention, process as shown in Figure 1, specifically: electricity After electrical automobile starting powers on, the tach signal that speed probe 7 acquires motor 4 shows motor 4 if 4 revolving speed of motor is normal Electrifying startup is normal, without carrying out power-off protection to motor 4；If after powering on, motor 4 fails to rotate, at this time entire car controller 2 The signal of brake pedal 1 need to be acquired, whether judgement is in on-position at this time, if braked at this time, without breaking Electric protection, if driver does not brake, electric machine controller 5 acquires the current signal of current acquisition module 6, judges mutually electricity Stream difference whether be greater than 10%, show that blocking phenomenon has occurred in motor if it is greater than 10%, at this time immediately power-off protection in order to avoid Burn motor, if not being greater than 10%, the circulation of electric machine controller 5 increases dtc signal, and in real time temperature collection sensor 3 with And the signal of current sensor 6, once electric current or temperature occur is worth situation more than predetermined threshold, then hard stop power-off is protected Shield guarantees motor safety；The speed conditions of the also real-time detection speed probe 7 of electric machine controller 5 simultaneously, when motor 4 is normally transported After turning, upper electric protection is automatically stopped.

Claims (1)

1. a kind of electric car start-up course motor rotation blockage self checking method, which comprises the following steps:
After electric car starting powers on, speed probe acquires the tach signal of motor,
If motor speed is normal, motor electrifying startup is normal, is not necessarily to power-off protection；
If motor fails to rotate, entire car controller acquires the signal of brake pedal, and whether electric car is in system at this time for judgement Dynamic state is not necessarily to power-off protection if braked at this time, if do not braked, electric machine controller acquires current sense The current signal of device output, judges whether the difference of phase current is greater than 10%, if it is greater than 10%, then it is existing to judge that stall occurs for motor As power-off protection immediately, otherwise, electric machine controller circulation increase dtc signal, and temperature collection sensor and electric current in real time The signal of sensor, when electric current or temperature are more than predetermined threshold, hard stop power-off protection；Temperature sensor detection electricity The temperature of machine, and temperature value is passed into entire car controller；
The revolving speed of electric machine controller real-time detection speed probe acquisition, after motor runs well, power-off protection is automatically stopped；
Each phase of the current sensor and three-phase motor is respectively connected with, and each phase current of motor in real time will collect Current data be sent to electric machine controller.
CN201610132853.XA 2016-03-09 2016-03-09 A kind of electric car start-up course motor rotation blockage self checking method Active CN105680419B (en)

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CN107401347B (en) * 2017-08-25 2018-11-27 重庆海德世拉索系统（集团）有限公司 The motorcar electric tailgate control method of adaptive environment temperature
CN108099694A (en) * 2017-12-01 2018-06-01 重庆长安汽车股份有限公司 A kind of electric vehicle and its electric machine control system and method
TWI726690B (en) * 2020-04-20 2021-05-01 三陽工業股份有限公司 A method for judging and protecting a stalled electric vehicle
CN112564550A (en) * 2020-12-15 2021-03-26 贵州航天凯山石油仪器有限公司 Intelligent starting and stopping device and method for oil well motor
CN113131832B (en) * 2021-04-21 2023-01-31 天津小鲨鱼智能科技有限公司 Electronic equipment, motor abnormity detection method and device
CN114368355B (en) * 2021-12-01 2023-12-22 深圳市康为宏科技有限公司 Auxiliary starting device and method for long-time shelving of automobile power supply
CN114325388B (en) * 2022-02-14 2022-11-25 爱科赛智能科技(浙江)有限公司 Motor starting locked-rotor fault diagnosis method based on soft-start current characteristics

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CN201774393U (en) * 2010-07-01 2011-03-23 金华市莱德电动技术有限公司 Electric vehicle motor with temperature control device
CN101976818A (en) * 2010-09-29 2011-02-16 上海日用-友捷汽车电气有限公司 Blocking protection method for automobile cooling fan motor
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Application publication date: 20160615

Assignee: BEIJING HANGSHENG NEW ENERGY TECHNOLOGY Co.,Ltd.

Assignor: BEIHANG University

Contract record no.: X2021110000001

Denomination of invention: A self checking method of motor locked rotor in the starting process of electric vehicle

Granted publication date: 20190215

License type: Common License

Record date: 20210114

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