CN108944575A - Electric automobile motor control method and device and automobile - Google Patents
Electric automobile motor control method and device and automobile Download PDFInfo
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- CN108944575A CN108944575A CN201810845857.1A CN201810845857A CN108944575A CN 108944575 A CN108944575 A CN 108944575A CN 201810845857 A CN201810845857 A CN 201810845857A CN 108944575 A CN108944575 A CN 108944575A
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- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000001514 detection method Methods 0.000 claims description 3
- 238000012795 verification Methods 0.000 claims description 3
- 208000027418 Wounds and injury Diseases 0.000 abstract description 11
- 230000006378 damage Effects 0.000 abstract description 11
- 208000014674 injury Diseases 0.000 abstract description 11
- 230000003068 static effect Effects 0.000 abstract description 9
- 230000005611 electricity Effects 0.000 description 9
- 230000004888 barrier function Effects 0.000 description 4
- 238000012790 confirmation Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000007935 neutral effect Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000035772 mutation Effects 0.000 description 2
- 230000033764 rhythmic process Effects 0.000 description 2
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Classifications
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- 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
- B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
- B60L15/20—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
-
- 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
- B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
- B60L15/20—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
- B60L15/28—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed without contact making and breaking, e.g. using a transductor
-
- 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
- Y02T10/72—Electric energy management in electromobility
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention discloses a method and a device for controlling a motor of an electric automobile and the automobile, wherein the method for controlling the motor of the electric automobile comprises the following steps: acquiring vehicle gear information; acquiring motor rotating speed information when the vehicle gear is N gear; controlling the motor to work by controlling the on-off state of an Insulated Gate Bipolar Transistor (IGBT) according to the vehicle gear information and the motor rotating speed information; when the IGBT is switched on, the motor is in a working state, and when the IGBT is switched off, the motor is in a stop working state. According to the embodiment of the invention, after the motor controller MCU acquires the gear information and the motor rotating speed information of the vehicle, the requirement of the whole vehicle is judged according to the gear information and the motor rotating speed information, and under the condition that the performance of the whole vehicle and the normal switching of gears are not influenced, the motor is controlled to work by controlling the on-off state of the IGBT, so that the forward rush of the vehicle caused by the unexpected driving torque generated by the motor due to the rotational fault when the vehicle is in a static N gear is prevented, and the injury of personnel and property is avoided.
Description
Technical field
The present invention relates to motor in electric automobile control field more particularly to a kind of electric car motor control methods, device
And automobile.
Background technique
Due to motor low-speed big and the big characteristic of maximum speed, pure electric vehicle majority does not use gearbox, but adopts
Vehicle is directly driven with single reduction ratio retarder, and when vehicle neutral gear, vehicle demand torque is zero, causes electricity when rotation becomes to break down
When the machine unexpected driving torque of generation out of control, the injury of personnel's property will cause.Further, since the direct current that battery provides is through inversion
Device is reverse into three-phase alternating current and supplies electricity to electric machine with energy, when vehicle is in static N gear, if not considering motor speed and torsion
Square demand, directly control inverter insulated gate bipolar transistor (Insulated Gate Bipolar Transistor,
Abbreviation IGBT) on or off, it may cause torsional impact or because erroneous judgement causes motor that cannot work, influence vehicle performance.
Summary of the invention
In order to solve the above-mentioned technical problems, the present invention provides a kind of electric car motor control method, device and automobile,
When solving pure electric automobile static N gear, motor leads to the problem of unexpected driving torque and causes the injury of personnel's property.
According to one aspect of the present invention, a kind of electric car motor control method is provided, comprising:
Obtain vehicle gear information；
When vehicle gear is that N obtains motor speed information when keeping off；
According to the vehicle gear information and the motor speed information, by controlling insulated gate bipolar transistor IGBT
Switch state control motor work；Wherein, when IGBT is connected, motor is in running order, and when IGBT is turned off, motor is to stop
Working condition.
Optionally, brilliant by control insulated gate bipolar according to the vehicle gear information and the motor speed information
Body pipe IGBT switch state control motor work the step of include:
When vehicle gear is N gear, and the absolute value of motor speed is greater than the first calibration value, the insulated gate bipolar is controlled
Transistor npn npn IGBT is on state；
When vehicle gear is N gear, and the absolute value of motor speed is less than the second calibration value, the torsion of entire car controller is obtained
Square demand；
If the absolute value of the torque demand is less than third calibration value, it is brilliant that insulated gate bipolar is controlled after preset duration
Body pipe IGBT is off state；
Wherein, first calibration value is greater than second calibration value.
Optionally, brilliant by control insulated gate bipolar according to the vehicle gear information and the motor speed information
The step of switch state control motor work of body pipe IGBT further include:
In the preset duration, electric machine controller (Moter Control Unit, abbreviation MCU) is to the exhausted of motor speed
Whether value is verified less than whether the torque demand of the second calibration value and entire car controller is less than third calibration value；
If check results be it is yes, control insulated gate bipolar transistor IGBT after the preset duration for shutdown shape
State；
If check results be it is no, control insulated gate bipolar transistor IGBT be on state.
Optionally, after the step of obtaining vehicle gear information, the electric car motor control method further include:
When vehicle gear is that non-N is kept off, controlling the insulated gate bipolar transistor IGBT is on state.
Optionally, the electric car motor control method further include:
Detect electric machine controller MCU faults itself situation；
If electric machine controller MCU is faulty, controlling insulated gate bipolar transistor IGBT is off state.
According to another aspect of the invention, a kind of motor in electric automobile control device is provided, comprising:
First obtains module, for obtaining vehicle gear information；
Second obtains module, for obtaining motor speed information when vehicle gear is N gear；
First control module, for being insulated by control according to the vehicle gear information and the motor speed information
The switch state control motor work of grid bipolar transistor IGBT；Wherein, when IGBT is connected, motor is in running order,
When IGBT is turned off, motor is stop working state.
Optionally, first control module includes:
First control unit, for being that N is kept off when vehicle gear, and when the absolute value of motor speed is greater than the first calibration value,
Controlling the insulated gate bipolar transistor IGBT is on state；
First acquisition unit, for being that N is kept off when vehicle gear, and when the absolute value of motor speed is less than the second calibration value,
Obtain the torque demand of entire car controller；
Second control unit, if the absolute value for the torque demand is less than third calibration value, after preset duration
Control insulated gate bipolar transistor IGBT is off state；
Wherein, first calibration value is greater than second calibration value.
Optionally, first control module further include:
Verification unit, in the preset duration, whether electric machine controller MCU to be less than the absolute value of motor speed
Whether the torque demand of the second calibration value and entire car controller, which is less than third calibration value, is verified；
Third control unit, if for check results be it is yes, control insulated gate bipolar transistor IGBT described pre-
If after duration being off state；
4th control unit, if for check results be it is no, control insulated gate bipolar transistor IGBT be connected shape
State.
Optionally, the motor in electric automobile control device further include:
Second control module, for when vehicle gear is that non-N is kept off, controlling the insulated gate bipolar transistor IGBT to be
On state.
Optionally, the motor in electric automobile control device further include:
Detection module, for detecting electric machine controller MCU faults itself situation；
Third control module, if faulty for electric machine controller MCU, controlling insulated gate bipolar transistor IGBT is
Off state.
Another aspect according to the present invention provides a kind of automobile, including above-mentioned motor in electric automobile control device.
The beneficial effect of the embodiment of the present invention is:
It, can be according to gear after electric machine controller MCU gets vehicle gear information and motor speed information in above scheme
Position information and motor speed information judge vehicle demand, are avoiding influencing vehicle performance and are not influencing the case where gear normally switches
Under, the switch state by controlling IGBT controls motor work, to prevent vehicle when static N is kept off because rotation accident barrier leads to electricity
Machine generates unexpected driving torque and causes vehicle preshoot, avoids the injury of personnel's property.
Detailed description of the invention
Fig. 1 shows the flow charts of the electric car motor control method of the embodiment of the present invention；
Fig. 2 indicates the idiographic flow schematic diagram of the electric car motor control method of the embodiment of the present invention；
Fig. 3 indicates the structural block diagram of the motor in electric automobile control device of the embodiment of the present invention；
Fig. 4 indicates the specific block diagram of the motor in electric automobile control device of the embodiment of the present invention.
Specific embodiment
The exemplary embodiment that the present invention will be described in more detail below with reference to accompanying drawings.Although showing the present invention in attached drawing
Exemplary embodiment, it being understood, however, that may be realized in various forms the present invention without should be by embodiments set forth here
It is limited.It is to be able to thoroughly understand the present invention on the contrary, providing these embodiments, and can be by the scope of the present invention
It is fully disclosed to those skilled in the art.
As shown in Figure 1, the embodiment provides a kind of electric car motor control methods, comprising:
Step 11 obtains vehicle gear information；
Step 12 obtains motor speed information when vehicle gear is N gear；
In the embodiment, electric machine controller MCU obtains the gear information of vehicle, the gear change of vehicle is judged, in vehicle
When keeping off i.e. neutral gear to be switched to N, indicates stationary vehicle or have the demand for stopping travelling, at this point, in order to guarantee personnel and vehicle
Safety, should be avoided within the period in N gear, vehicle because rotation displacement set mutation etc. caused by reasons motor generate it is unexpected
Driving torque, cause personal injury.But if directly cutting off the power supply of motor, being easy, which makes motor generate torsional impact, is led
It causes vehicle shake or output negative torque that vehicle is made to generate pause and transition in rhythm or melody, influences vehicle performance.Therefore, when vehicle gear is that N is kept off,
It is also contemplated that the revolving speed that motor is current.
Step 13, according to the vehicle gear information and the motor speed information, it is brilliant to pass through control insulated gate bipolar
The switch state control motor work of body pipe IGBT；Wherein, when IGBT is connected, motor is in running order, when IGBT is turned off, electricity
Machine is stop working state.
In the embodiment, control centre of the electric machine controller MCU as entire braking system, including inverter and control
Device, inverter receive the direct current energy of battery conveying, are reverse into the motor offer power supply that three-phase alternating current supplies electricity to vehicle.Wherein, electric
Machine controller is three phase full bridge driving, can use six road IGBT composition inverter, and controller acquires motor three-phase current and turns
Sub- location information is converted to torque command, and torque command is converted to the switch state of six road IGBT to control motor rotation.
In IGBT conducting, motor receives the three-phase alternating current that power supply provides, and is able to respond vehicle demand normal work；It is turned off in IGBT
When, the connection cutting of motor and power supply, motor loses driving source, cannot respond vehicle demand again, and motor is stop working state.
The stop working state may include the state that motor stops working and gradually become the state of stopping by working condition.
It, can be according to gear information and electricity after electric machine controller MCU gets vehicle gear information and motor speed information
Machine rotary speed information judges vehicle demand, in the case where avoiding influences vehicle performance and do not influence gear and normally switch, passes through control
The switch state control motor work of IGBT processed, to prevent vehicle when static N is kept off because rotation accident barrier causes motor generation non-
Expected driving torque and cause vehicle preshoot, avoid personnel's property injury.
Specifically, as shown in Fig. 2, step 13 includes:
Step 131, when vehicle gear be N gear, and the absolute value of motor speed be greater than the first calibration value when, control it is described absolutely
Edge grid bipolar transistor IGBT is on state；
In the embodiment, when the absolute value that MCU determines motor speed is greater than the first calibration value, and vehicle gear is cut at this time
It is changed to N gear, if IGBT is on state, not can be carried out IGBT shutdown at this time, otherwise motor has negative torque output, influences whole
Vehicle performance, therefore, should keep IGBT is on state.Since after vehicle powers on, it is off state that MCU, which defaults IGBT, if
The absolute value that MCU determines motor speed at this time is greater than the first calibration value, and vehicle is N gear, then should control IGBT conducting.
Wherein, first calibration value is user according to demand and vehicle parameter is demarcated, it is preferable that described first
Calibration value can be 100rpm.
Step 132, when vehicle gear is N gear, and when the absolute value of motor speed is less than the second calibration value, obtain vehicle control
The torque demand of device processed；
In the embodiment, vehicle gear is determined as N gear in MCU, and the absolute value of motor speed is less than the second calibration value
When, IGBT shutdown cannot be directly controlled, needs further to judge according to the torque demand of entire car controller the real intention of user,
To control the working condition of motor.When vehicle is switched to N gear by non-N gear, if directly turning off IGBT, it will cause torques
Impact, causes vehicle to be shaken, and influences vehicle performance and experiences by bus.Second calibration value be user according to demand and vehicle
Parameter is demarcated, and second calibration value should be less than first calibration value, it is preferable that second calibration value can be
50rpm。
Wherein, the difference between second calibration value and first calibration value is the hysteresis space reserved for vehicle.
When motor speed is greater than the first calibration value, control IGBT conducting, motor is worked normally, if motor speed is less than the first calibration
After value, IGBT shutdown is immediately controlled, motor stops working, then may due to motor and power supply connection and disconnect more frequent, shadow
Motor performance is rung, therefore there should be difference appropriate between the second calibration value of setting and the first calibration value.
If the absolute value of step 133, the torque demand is less than third calibration value, insulated gate is controlled after preset duration
Bipolar transistor IGBT is off state；Wherein, first calibration value is greater than second calibration value.
In the embodiment, if vehicle gear is N gear, and the absolute value of motor speed is less than the second calibration value, and vehicle
The torque demand of controller is less than third calibration value, it is believed that user has parking to be intended to, then should control IGBT and close after preset duration
It is disconnected.The purpose that control IGBT is turned off after preset duration is the intention for making MCU verify user within the time period, is prevented because obtaining
Interference caused by signal fault, causes user to be intended to error in judgement.The preset duration is that user sets according to demand, described pre-
If duration can be 100ms.
Wherein, the third calibration value is that user demarcates according to demand, the third calibration value should be close to zero compared with
Small numerical value, it is preferable that the third calibration value can be 1Nm, i.e., in the absolute value that vehicle gear is N gear, motor speed
When being less than 1Nm less than the torque demand of the second calibration value and entire car controller, it is believed that user is intended to parking.The program can
While not influencing vehicle performance, accurate judgement user is intended to.
In the above embodiment of the present invention, step 13 further include:
In the preset duration, electric machine controller MCU to the absolute value of motor speed whether less than the second calibration value, with
And whether the torque demand of entire car controller is less than third calibration value and is verified；
If check results be it is yes, control insulated gate bipolar transistor IGBT after the preset duration for shutdown shape
State；If check results be it is no, control insulated gate bipolar transistor IGBT be on state.
In the embodiment, vehicle gear is determined as N gear in MCU, and the absolute value of motor speed is less than the second calibration value,
And the torque demand of entire car controller be less than third calibration value when, in order to prevent to user be intended to erroneous judgement, MCU control IGBT
In the preset duration before shutdown, user is intended to verify, that is, whether the absolute value for rejudging motor speed is small
Whether it is less than third calibration value in the torque demand of the second calibration value and entire car controller, in the absolute of confirmation motor speed
Value is less than the second calibration value, and when the torque demand of entire car controller is less than third calibration value, and confirmation user has parking to be intended to, control
IGBT processed is turned off after the preset duration.If MCU detects discontented in the preset duration before control IGBT shutdown
The absolute value of sufficient motor speed is less than third calibration value less than the torque demand of the second calibration value and entire car controller, it is believed that it
The motor speed of preceding acquisition or the torque demand of entire car controller are wrong, then controlling IGBT is on state, enable motor
It works normally.
In the above embodiment of the present invention, the electric car motor control method further include:
Step 14, when vehicle gear be non-N keep off when, control the insulated gate bipolar transistor IGBT be on state.
In the embodiment, when it is non-N gear that MCU, which determines vehicle gear, in order to not influence the switching of normal gear, it should control
IGBT is on state, responds vehicle demand.
In the above embodiment of the present invention, the electric car motor control method further include:
Detect electric machine controller MCU faults itself situation；If electric machine controller MCU is faulty, insulated gate bipolar is controlled
Transistor npn npn IGBT is off state.
In the embodiment, MCU should monitor faults itself state in real time, in MCU fault-free, ability normal control motor
Working condition.In MCU there are IGBT shutdown when failure, should be immediately controlled, work is left the motor off, motor operation irregularity is avoided to make
It is injured at personnel and property.
The program combines the torque of entire car controller to need by obtaining the gear information and motor speed information of vehicle
It asks, in the case where not influencing vehicle performance, the accurate demand for responding user, while preventing vehicle when static N is kept off because rotation becomes
Failure causes motor to generate unexpected driving torque and cause vehicle preshoot, avoids the injury of personnel's property.
As shown in figure 3, the embodiment provides a kind of motor in electric automobile control devices, comprising:
First obtains module 31, for obtaining vehicle gear information；
Second obtains module 32, for obtaining motor speed information when vehicle gear is N gear；
In the embodiment, electric machine controller MCU obtains the gear information of vehicle, the gear change of vehicle is judged, in vehicle
When keeping off i.e. neutral gear to be switched to N, indicates stationary vehicle or have the demand for stopping travelling, at this point, in order to guarantee personnel and vehicle
Safety, should be avoided within the period in N gear, vehicle because rotation displacement set mutation etc. caused by reasons motor generate it is unexpected
Driving torque, cause personal injury.But if directly cutting off the power supply of motor, being easy, which makes motor generate torsional impact, is led
It causes vehicle shake or output negative torque that vehicle is made to generate pause and transition in rhythm or melody, influences vehicle performance.Therefore, when vehicle gear is that N is kept off,
It is also contemplated that the revolving speed that motor is current.
First control module 33 is used for according to the vehicle gear information and the motor speed information, exhausted by controlling
The switch state control motor work of edge grid bipolar transistor IGBT；Wherein, when IGBT is connected, motor is in running order,
When IGBT is turned off, motor is stop working state.
In the embodiment, control centre of the electric machine controller MCU as entire braking system, including inverter and control
Device, inverter receive the direct current energy of battery conveying, are reverse into the motor offer power supply that three-phase alternating current supplies electricity to vehicle.Wherein, electric
Machine controller is three phase full bridge driving, can use six road IGBT composition inverter, and controller acquires motor three-phase current and turns
Sub- location information is converted to torque command, and torque command is converted to the switch state of six road IGBT to control motor rotation.
In IGBT conducting, motor receives the three-phase alternating current that power supply provides, and is able to respond vehicle demand normal work；It is turned off in IGBT
When, the connection cutting of motor and power supply, motor loses driving source, cannot respond vehicle demand again, and motor is stop working state.
The stop working state may include the state that motor stops working and gradually become the state of stopping by working condition.
It, can be according to gear information and electricity after electric machine controller MCU gets vehicle gear information and motor speed information
Machine rotary speed information judges vehicle demand, in the case where avoiding influences vehicle performance and do not influence gear and normally switch, passes through control
The switch state control motor work of IGBT processed, to prevent vehicle when static N is kept off because rotation accident barrier causes motor generation non-
Expected driving torque and cause vehicle preshoot, avoid personnel's property injury.
Specifically, as shown in figure 4, first control module 33 includes:
First control unit 331, for being N gear when vehicle gear, and the absolute value of motor speed is greater than the first calibration value
When, controlling the insulated gate bipolar transistor IGBT is on state；
In the embodiment, when the absolute value that MCU determines motor speed is greater than the first calibration value, and vehicle gear is cut at this time
It is changed to N gear, if IGBT is on state, not can be carried out IGBT shutdown at this time, otherwise motor has negative torque output, influences whole
Vehicle performance, therefore, should keep IGBT is on state.Since after vehicle powers on, it is off state that MCU, which defaults IGBT, if
The absolute value that MCU determines motor speed at this time is greater than the first calibration value, and vehicle is N gear, then should control IGBT conducting.
Wherein, first calibration value is user according to demand and vehicle parameter is demarcated, it is preferable that described first
Calibration value can be 100rpm.
First acquisition unit 332, for being N gear when vehicle gear, and the absolute value of motor speed is less than the second calibration value
When, obtain the torque demand of entire car controller；
In the embodiment, vehicle gear is determined as N gear in MCU, and the absolute value of motor speed is less than the second calibration value
When, IGBT shutdown cannot be directly controlled, needs further to judge according to the torque demand of entire car controller the real intention of user,
To control the working condition of motor.When vehicle is switched to N gear by non-N gear, if directly turning off IGBT, it will cause torques
Impact, causes vehicle to be shaken, and influences vehicle performance and experiences by bus.Second calibration value be user according to demand and vehicle
Parameter is demarcated, and second calibration value should be less than first calibration value, it is preferable that second calibration value can be
50rpm。
Wherein, the difference between second calibration value and first calibration value is the hysteresis space reserved for vehicle.
When motor speed is greater than the first calibration value, control IGBT conducting, motor is worked normally, if motor speed is less than the first calibration
After value, IGBT shutdown is immediately controlled, motor stops working, then may due to motor and power supply connection and disconnect more frequent, shadow
Motor performance is rung, therefore there should be difference appropriate between the second calibration value of setting and the first calibration value.
Second control unit 333, if the absolute value for the torque demand is less than third calibration value, in preset duration
Control insulated gate bipolar transistor IGBT is off state afterwards；Wherein, first calibration value is greater than second calibration value.
In the embodiment, in the embodiment, if vehicle gear is N gear, and the absolute value of motor speed is less than the second mark
Definite value, and the torque demand of entire car controller is less than third calibration value, it is believed that user has parking to be intended to, then should control IGBT pre-
If being turned off after duration.The purpose that control IGBT is turned off after preset duration is the intention for making MCU verify user within the time period,
It prevents from causing user to be intended to error in judgement because of interference caused by obtaining signal fault.The preset duration be user according to demand
Setting, the preset duration can be 100ms.
Wherein, the third calibration value is that user demarcates according to demand, the third calibration value should be close to zero compared with
Small numerical value, it is preferable that the third calibration value can be 1Nm, i.e., in the absolute value that vehicle gear is N gear, motor speed
When being less than 1Nm less than the torque demand of the second calibration value and entire car controller, it is believed that user is intended to parking.The program can
While not influencing vehicle performance, accurate judgement user is intended to.
In the above embodiment of the present invention, first control module 33 further include:
Verification unit, in the preset duration, whether electric machine controller MCU to be less than the absolute value of motor speed
Whether the torque demand of the second calibration value and entire car controller, which is less than third calibration value, is verified；
Third control unit, if for check results be it is yes, control insulated gate bipolar transistor IGBT described pre-
If after duration being off state；
4th control unit, if for check results be it is no, control insulated gate bipolar transistor IGBT be connected shape
State.
In the embodiment, in the embodiment, vehicle gear is determined as N gear in MCU, and the absolute value of motor speed is less than
Second calibration value, and the torque demand of entire car controller be less than third calibration value when, in order to prevent to user be intended to erroneous judgement,
MCU is intended to verify, that is, rejudges motor speed in the preset duration before control IGBT shutdown to user
Whether whether absolute value less than the torque demand of the second calibration value and entire car controller be less than third calibration value, in confirmation electricity
The absolute value of machine revolving speed confirms user less than the second calibration value, and when the torque demand of entire car controller is less than third calibration value
There is parking to be intended to, control IGBT is turned off after the preset duration.If in the preset duration before control IGBT shutdown,
MCU detects that the absolute value for being unsatisfactory for motor speed is less than third less than the torque demand of the second calibration value and entire car controller
Calibration value, it is believed that the torque demand of the motor speed or entire car controller that obtain before is wrong, then controls IGBT as conducting shape
State enables motor to work normally.
In the above embodiment of the present invention, the motor in electric automobile control device further include:
Second control module 34, for controlling the insulated gate bipolar transistor IGBT when vehicle gear is that non-N is kept off
For on state.
In the embodiment, when it is non-N gear that MCU, which determines vehicle gear, in order to not influence the switching of normal gear, it should control
IGBT is on state, responds vehicle demand.
In the above embodiment of the present invention, the motor in electric automobile control device further include:
Detection module, for detecting electric machine controller MCU faults itself situation；
Third control module, if faulty for electric machine controller MCU, controlling insulated gate bipolar transistor IGBT is
Off state.
In the embodiment, MCU should monitor faults itself state in real time, in MCU fault-free, ability normal control motor
Working condition.In MCU there are IGBT shutdown when failure, should be immediately controlled, work is left the motor off, motor operation irregularity is avoided to make
It is injured at personnel and property.
The program combines the torque of entire car controller to need by obtaining the gear information and motor speed information of vehicle
It asks, in the case where not influencing vehicle performance, the accurate demand for responding user, while preventing vehicle when static N is kept off because rotation becomes
Failure causes motor to generate unexpected driving torque and cause vehicle preshoot, avoids the injury of personnel's property.
It should be noted that the device is device corresponding with above-mentioned individual recommended method, institute in above method embodiment
There is implementation suitable for the embodiment of the device, can also reach identical technical effect.
The embodiment provides a kind of automobiles, including above-mentioned motor in electric automobile control device.
The embodiment of the invention can be with after electric machine controller MCU gets vehicle gear information and motor speed information
Vehicle demand is judged according to gear information and motor speed information, is avoiding influencing vehicle performance and do not influence gear normally to switch
In the case where, the switch state by controlling IGBT controls motor work, to prevent vehicle when static N is kept off because of rotation accident barrier
Cause motor to generate unexpected driving torque and cause vehicle preshoot, avoids the injury of personnel's property.
Above-described is the preferred embodiment of the present invention, it should be pointed out that the ordinary person of the art is come
It says, can also make several improvements and retouch under the premise of not departing from principle of the present invention, these improvements and modifications also exist
In protection scope of the present invention.
Claims (11)
1. a kind of electric car motor control method characterized by comprising
Obtain vehicle gear information；
When vehicle gear is that N obtains motor speed information when keeping off；
According to the vehicle gear information and the motor speed information, pass through opening for control insulated gate bipolar transistor IGBT
Off status controls motor work；Wherein, when IGBT is connected, motor is in running order, and when IGBT is turned off, motor is to stop working
State.
2. electric car motor control method according to claim 1, which is characterized in that according to the vehicle gear information
With the motor speed information, the switch state by controlling insulated gate bipolar transistor IGBT controls the step of motor works
Include:
When vehicle gear is N gear, and the absolute value of motor speed is greater than the first calibration value, it is brilliant to control the insulated gate bipolar
Body pipe IGBT is on state；
When vehicle gear is N gear, and the absolute value of motor speed is less than the second calibration value, the torque for obtaining entire car controller is needed
It asks；
If the absolute value of the torque demand is less than third calibration value, insulated gate bipolar transistor is controlled after preset duration
IGBT is off state；
Wherein, first calibration value is greater than second calibration value.
3. electric car motor control method according to claim 2, which is characterized in that according to the vehicle gear information
With the motor speed information, the switch state by controlling insulated gate bipolar transistor IGBT controls the step of motor works
Further include:
In the preset duration, whether electric machine controller MCU is to the absolute value of motor speed less than the second calibration value and whole
Whether the torque demand of vehicle controller, which is less than third calibration value, is verified；
If check results be it is yes, control insulated gate bipolar transistor IGBT after the preset duration as off state；
If check results be it is no, control insulated gate bipolar transistor IGBT be on state.
4. electric car motor control method according to claim 1, which is characterized in that obtaining vehicle gear information
After step, the electric car motor control method further include:
When vehicle gear is that non-N is kept off, controlling the insulated gate bipolar transistor IGBT is on state.
5. electric car motor control method according to claim 1, which is characterized in that the motor in electric automobile control
Method further include:
Detect electric machine controller MCU faults itself situation；
If electric machine controller MCU is faulty, controlling insulated gate bipolar transistor IGBT is off state.
6. a kind of motor in electric automobile control device characterized by comprising
First obtains module, for obtaining vehicle gear information；
Second obtains module, for obtaining motor speed information when vehicle gear is N gear；
First control module, for passing through control insulated gate pair according to the vehicle gear information and the motor speed information
The switch state control motor work of bipolar transistor IGBT；Wherein, when IGBT is connected, motor is in running order, and IGBT is closed
When disconnected, motor is stop working state.
7. motor in electric automobile control device according to claim 6, which is characterized in that the first control module packet
It includes:
First control unit, for when vehicle gear be N keep off, and the absolute value of motor speed be greater than the first calibration value when, control
The insulated gate bipolar transistor IGBT is on state；
First acquisition unit, for being that N is kept off when vehicle gear, and when the absolute value of motor speed is less than the second calibration value, acquisition
The torque demand of entire car controller；
Second control unit controls after preset duration if the absolute value for the torque demand is less than third calibration value
Insulated gate bipolar transistor IGBT is off state；
Wherein, first calibration value is greater than second calibration value.
8. motor in electric automobile control device according to claim 7, which is characterized in that first control module is also wrapped
It includes:
Verification unit, in the preset duration, whether electric machine controller MCU to be to the absolute value of motor speed less than second
Whether the torque demand of calibration value and entire car controller, which is less than third calibration value, is verified；
Third control unit, if for check results be it is yes, control insulated gate bipolar transistor IGBT when described default
It is off state after length；
4th control unit, if for check results be it is no, control insulated gate bipolar transistor IGBT as on state.
9. motor in electric automobile control device according to claim 6, which is characterized in that the motor in electric automobile control
Device further include:
Second control module, for controlling the insulated gate bipolar transistor IGBT as conducting when vehicle gear is that non-N is kept off
State.
10. motor in electric automobile control device according to claim 6, which is characterized in that the motor in electric automobile control
Device processed further include:
Detection module, for detecting electric machine controller MCU faults itself situation；
Third control module controls insulated gate bipolar transistor IGBT if faulty for electric machine controller MCU as shutdown
State.
11. a kind of automobile, which is characterized in that control and fill including motor in electric automobile described in any one of claim 6~10
It sets.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810845857.1A CN108944575A (en) | 2018-07-27 | 2018-07-27 | Electric automobile motor control method and device and automobile |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810845857.1A CN108944575A (en) | 2018-07-27 | 2018-07-27 | Electric automobile motor control method and device and automobile |
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