CN105882452A - Electric vehicle drive motor efficiency optimizing control method and system - Google Patents
Electric vehicle drive motor efficiency optimizing control method and system Download PDFInfo
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- CN105882452A CN105882452A CN201610257097.3A CN201610257097A CN105882452A CN 105882452 A CN105882452 A CN 105882452A CN 201610257097 A CN201610257097 A CN 201610257097A CN 105882452 A CN105882452 A CN 105882452A
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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
- B60L15/2045—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 for optimising the use of energy
-
- 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
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/40—Drive Train control parameters
- B60L2240/42—Drive Train control parameters related to electric machines
- B60L2240/421—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
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/40—Drive Train control parameters
- B60L2240/42—Drive Train control parameters related to electric machines
- B60L2240/423—Torque
-
- 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
- B60L2250/00—Driver interactions
- B60L2250/26—Driver interactions by pedal actuation
- B60L2250/28—Accelerator pedal thresholds
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- 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 relates to an electric vehicle drive motor efficiency optimizing control method and system. In the invention, the vehicle driving mode is classified into a power mode and an economical mode according to the power battery remaining capacity state SOC value; when the vehicle power battery remaining capacity state SOC is greater than the set value, the vehicle is controlled to stay in the power mode, and the torque is output according to the motor torque required by the driver; and when the vehicle power battery remaining capacity state SOC is less than the set value, the vehicle is controlled to stay in the economical mode, and the motor is controlled according to current speed of the drive motor and the efficient-point torque corresponding to the motor torque required by the driver so as to drive the vehicle to run. In the invention, the motor can work near the efficient point more on the premise of guaranteeing the basic dynamic performance of the vehicle, the working efficiency is improved, the power consumption of the electric components is reduced, and the driving range of the pure electric vehicle can be effectively prolonged; and moreover, the designed loading capacity of the whole vehicle battery can be reduced, and the vehicle using cost is lowered.
Description
Technical field
The present invention relates to a kind of driving motor for electric automobile efficiency optimization control method and system, belong to electric automobile
Motor control technology field.
Background technology
Electric automobile can preferably solve that fossil energy is in short supply and problem of environmental pollution, but continual mileage is short and
Battery high in cost of production bottleneck seriously constrains the development of electric automobile, owing to country and local government lead at new forms of energy
There is corresponding subsidy in territory, and it is not the highest that new-energy automobile purchases car cost, and therefore user focuses more on electronic vapour
The use cost power consumption of car.From key components and parts angle lifting motor and battery efficiency, and take into account cost,
Research and development difficulty is big, the cycle is long, therefore from the angle controlled, optimizes electricity on the premise of ensureing automobile key property
Machine work efficiency, becomes the good approach reducing car load power consumption.
The patent application document of application number 201410419998.9, discloses a kind of pure electric automobile and at the uniform velocity travels
Time power demand coupling and optimize method, the method is by by speed demarcation interval, at current vehicle speed place
Find dynamical system peak efficiency operating point in interval, and speed maintained the speed corresponding to this operating point,
Vehicle is made to travel with most economical speed in each vehicle speed intervals.Although this method can be real to a certain extent
The economic driving of existing vehicle, but it is not particularly suited for acceleration and deceleration road condition the most frequently, such as urban congestion
Operating mode and rural road, therefore applicable working condition is extremely limited, and the method also not according to SOC value to vehicle
Driving mode makes a distinction.
Summary of the invention
It is an object of the invention to provide a kind of driving motor for electric automobile efficiency optimization control method and system, with
Solve the problem that current motor controls not to be suitable for acceleration and deceleration road condition the most frequently.
The present invention solves that above-mentioned technical problem provides a kind of driving motor for electric automobile efficiency-optimization control side
Method, this control method comprises the following steps:
1) collection vehicle electrokinetic cell dump energy state SOC, it is judged that power cell of vehicle dump energy state
Whether SOC is more than setting value；
2) if less than setting value, then control vehicle and travel in the economy mode, i.e. according to driving motor to work as forward
Motor is controlled by speed and the high-efficiency point moment of torsion corresponding to operator demand's Motor torque, drives car to travel；
3) if power cell of vehicle dump energy state SOC is more than setting value, then vehicle is controlled under dynamic mode
Travel, i.e. control to drive motor to carry out moment of torsion output according to the Motor torque of operator demand, drive vehicle to travel.
Described step 2) in high-efficiency point moment of torsion acquisition process as follows:
A. according to the corresponding interval set, Motor torque and rotating speed are divided an operation interval；
B., N number of operating point is set in each interval, each operating point is carried out electric system efficiency characteristic test；
C. finding the operating point that electric efficiency in each interval is the highest, this electric efficiency high workload point is corresponding
Motor torque is electric efficiency high torque.
When vehicle runs in the economy mode, vehicle electrical adnexa is carried out drops power or closedown processes.
When vehicle slides in the economy mode, control motor and generate electricity according to high-efficiency point moment of torsion.
When vehicle is braked in the economy mode, compare operator demand's Motor torque and high-efficiency point moment of torsion, according to
Torque control motors bigger in Liang Zhe drives vehicle to travel.
When sliding or brake under vehicle being at dynamic mode, according to brake pedal aperture and current motor rotating speed, then
Demarcate in conjunction with real vehicle and determine electric power generation moment of torsion, and ensure superposing moment of torsion and expiring of electric braking and original air-pressure brake
Foot ECE brake legislation requirement, controls motor and controls electric power generation according to the power generation torque determined.
Present invention also offers a kind of driving motor for electric automobile efficiency-optimization control system, this control system includes
Judge module, economic model control module and dynamic mode control module,
Described judge module is used for judging that whether power cell of vehicle dump energy state SOC is more than setting value；
Described economic model control module is gone in the economy mode for controlling vehicle when SOC is less than setting value
Sail, i.e. according to the high-efficiency point moment of torsion driven corresponding to the current rotating speed of motor and operator demand's Motor torque to motor
It is controlled, drives car to travel；
Described dynamic mode control module is for being more than setting value in power cell of vehicle dump energy state SOC
Time, control vehicle and travel under dynamic mode, i.e. control to drive motor to enter according to the Motor torque of operator demand
Row moment of torsion exports, and drives vehicle to travel.
In described economic model control module, the acquisition process of high-efficiency point moment of torsion is as follows:
A. according to the corresponding interval set, Motor torque and rotating speed are divided an operation interval；
B., N number of operating point is set in each interval, each operating point is carried out electric system efficiency characteristic test；
C. finding the operating point that electric efficiency in each interval is the highest, this electric efficiency high workload point is corresponding
Motor torque is electric efficiency high torque.
When vehicle runs in the economy mode, economic model control module vehicle electrical adnexa is carried out drop power or
Closedown processes.
When vehicle slides in the economy mode, control motor and generate electricity according to high-efficiency point moment of torsion；Work as vehicle
When braking in the economy mode, compare operator demand's Motor torque and high-efficiency point moment of torsion, according in both relatively
Big torque control motors drives vehicle to travel.
The invention has the beneficial effects as follows: vehicle is travelled mould according to electrokinetic cell dump energy state SOC by the present invention
Formula divides into dynamic mode and economic model, when power cell of vehicle dump energy state SOC is more than setting value,
Control vehicle to be under dynamic mode, carry out moment of torsion output according to the Motor torque of operator demand；When vehicle moves
When power battery dump energy state SOC is less than setting value, controls vehicle and be under economic model, electricity adnexa is entered
Row fall power or closedown process, according to the height driven corresponding to the current rotating speed of motor and operator demand's Motor torque
Motor is controlled by effect point moment of torsion, drives car to travel.The present invention can make motor with higher in the economy mode
Efficiency output moment of torsion, and city operating mode and the high speed cruising condition of frequent acceleration and deceleration can be adapted to simultaneously.?
On the premise of ensureing vehicle basic motive performance, enable motor to be more operated near high-efficiency point, improve work
Make efficiency, and reduce the power consumption of consuming parts, it is possible to the effective continual mileage extending pure electric automobile, and
The design capacity of car load battery can be reduced, reduce vehicle use cost.
Accompanying drawing explanation
Fig. 1 is the flow chart of driving motor for electric automobile efficiency optimization control method；
Fig. 2 is the schematic diagram of driving motor for electric automobile efficiency optimization control method.
Detailed description of the invention
Below in conjunction with the accompanying drawings the detailed description of the invention of the present invention is described further.
A kind of embodiment of the driving motor for electric automobile efficiency optimization control method of the present invention
The present invention according to electrokinetic cell dump energy state SOC car travel mode divided into dynamic mode and
Economic model, when power cell of vehicle dump energy state SOC is more than setting value, controls vehicle and is in power
Under pattern, carry out moment of torsion output according to the Motor torque of operator demand；When power cell of vehicle dump energy shape
When state SOC is less than setting value, controls vehicle and be under economic model, carry out dropping at power or closedown to electricity adnexa
Reason, enters motor according to driving the high-efficiency point moment of torsion corresponding to the current rotating speed of motor and operator demand's Motor torque
Row controls, and drives car to travel.The optimal control method of the present invention is as shown in Figure 1, it is achieved principle as in figure 2 it is shown,
Implement step as follows:
1. collection vehicle electrokinetic cell dump energy state SOC, it is judged that power cell of vehicle dump energy state
SOC determines car travel mode.
When power cell of vehicle dump energy state SOC collected is more than setting value, then control vehicle operation and exist
Under dynamic mode, when power cell of vehicle dump energy state SOC collected is less than setting value, control car
Work economic model under, the setting value in the present embodiment is 30%.
2. work as vehicle operation in the economy mode, electricity adnexa is carried out dropping power or closedown processes, electric according to driving
Motor is controlled by the high-efficiency point moment of torsion corresponding to the current rotating speed of machine and operator demand's Motor torque, drives car
Travel.
Wherein the acquisition process of high-efficiency point moment of torsion is as follows:
A. according to the corresponding interval set, Motor torque and rotating speed are divided an operation interval.
The present embodiment divides an operation interval at interval of 200Nm rotating speed at interval of 300rpm to Motor torque,
And each operation interval is numbered, such as A1, A2 ..., An.
B., N number of operating point is set in each interval, each operating point is carried out electric system efficiency characteristic test.
The present embodiment is at (100Nm rotating speed interval, moment of torsion interval, 6 operating points of each operation interval build-in test
100rpm), such as P1 (A1), P2 (A1) ... P6 (A1) ....Each operating point of each operation interval is carried out electricity
Machine system effectiveness characteristic test.
C. finding the operating point that electric efficiency in each interval is the highest, this electric efficiency high workload point is corresponding
Motor torque is electric efficiency high torque.
The computing formula of electric system efficiency is:
ηSystem=ηMotor×ηController
The present embodiment finds the operating point that electric efficiency in each operation interval is the highest, such as Pmax (A1),
Pmax(A2),…,Pmax(An)。
When vehicle travels in the economy mode, entire car controller according to gather motor current rotating speed n_Mot and
Accelerator pedal opening amount signal, calculates the Motor torque T_Drive of current driver's demand, determines that forward worked as by motor
Speed and demand Motor torque place operation interval Am, then find under current rotating speed in this operation interval
Efficiency operation point Pmax (Am, n_Mot), using the Motor torque corresponding to peak efficiency operating point as motor
Output torque T _ Economy, i.e. high-efficiency point moment of torsion, drive vehicle to travel.Wherein,
T_Economy=T{Pmax (Am, n_Mot) }；
When vehicle slides in the economy mode, entire car controller inquires about electricity under this rotating speed according to the current rotating speed of motor
The operation interval of machine, and inquire about peak efficiency operating point under this operation interval this rotating speed interior, corresponding motor is turned round
Square, and send and slide feedback torque command to electric machine controller, generate electricity.
When vehicle is braked in the economy mode, entire car controller inquires about electricity under this rotating speed according to the current rotating speed of motor
The operation interval of machine, and inquire about peak efficiency operating point under this operation interval this rotating speed interior, corresponding motor is turned round
Square, contrasts operator demand's moment of torsion and high-efficiency point moment of torsion, takes higher value, and sends torque command to electricity
Machine controller, motor response torque command also drives vehicle to travel.
T_Brake_Commd=Max{T_Brake, T_Economy}
3., when vehicle operation is under dynamic mode, control to drive motor to enter according to the Motor torque of operator demand
Row moment of torsion exports, and drives vehicle to travel.
When travelling under vehicle is at dynamic mode, turn round according to the peak value of motor under accelerator pedal aperture and current rotating speed
Square, calculates operator demand's moment of torsion, and this torque command is sent to electric machine controller, electric machine controller according to
Operator demand's torque control motors, drives vehicle to travel.When sliding or brake under vehicle being at dynamic mode,
According to brake pedal aperture and current motor rotating speed, and combine real vehicle and demarcate and determine electric power generation moment of torsion, and ensure
Superposing moment of torsion and meeting ECE brake legislation requirement of electric braking and original air-pressure brake, sends this torque command
To electric machine controller, electric machine controller control motor according to the power generation torque set and generate electricity.
T_Drive=AccPed_Raw × T_max (n_Mot)
A kind of embodiment of the driving motor for electric automobile efficiency-optimization control system of the present invention
The control system of the present embodiment includes that judge module, economic model control module and dynamic mode control mould
Block, it is judged that module is used for judging that whether power cell of vehicle dump energy state SOC is more than setting value；Economic mould
Formula control module travels in the economy mode for controlling vehicle when SOC is less than setting value, i.e. according to driving electricity
Motor is controlled by the high-efficiency point moment of torsion corresponding to the current rotating speed of machine and operator demand's Motor torque, drives car
Travel；Dynamic mode control module is used for when power cell of vehicle dump energy state SOC is more than setting value,
Control vehicle to travel under dynamic mode, i.e. control to drive motor to turn round according to the Motor torque of operator demand
Square exports, and drives vehicle to travel.The process that realizes of modules is described in detail in the embodiment of method,
Here repeat no more.
Claims (10)
1. a driving motor for electric automobile efficiency optimization control method, it is characterised in that this control method bag
Include following steps:
1) collection vehicle electrokinetic cell dump energy state SOC, it is judged that power cell of vehicle dump energy state
Whether SOC is more than setting value；
2) if less than setting value, then control vehicle and travel in the economy mode, i.e. according to driving motor to work as forward
Motor is controlled by speed and the high-efficiency point moment of torsion corresponding to operator demand's Motor torque, drives car to travel；
3) if power cell of vehicle dump energy state SOC is more than setting value, then vehicle is controlled under dynamic mode
Travel, i.e. control to drive motor to carry out moment of torsion output according to the Motor torque of operator demand, drive vehicle to travel.
Driving motor for electric automobile efficiency optimization control method the most according to claim 1, its feature exists
In, described step 2) in high-efficiency point moment of torsion acquisition process as follows:
A. according to the corresponding interval set, Motor torque and rotating speed are divided an operation interval；
B., N number of operating point is set in each interval, each operating point is carried out electric system efficiency characteristic test；
C. finding the operating point that electric efficiency in each interval is the highest, this electric efficiency high workload point is corresponding
Motor torque is electric efficiency high torque.
Driving motor for electric automobile efficiency optimization control method the most according to claim 1, its feature exists
In, when vehicle runs in the economy mode, vehicle electrical adnexa is carried out drops power or closedown processes.
Driving motor for electric automobile efficiency optimization control method the most according to claim 1, its feature exists
In, when vehicle slides in the economy mode, control motor and generate electricity according to high-efficiency point moment of torsion.
Driving motor for electric automobile efficiency optimization control method the most according to claim 1, its feature exists
In, when vehicle is braked in the economy mode, compare operator demand's Motor torque and high-efficiency point moment of torsion, according to
Torque control motors bigger in Liang Zhe drives vehicle to travel.
Driving motor for electric automobile efficiency optimization control method the most according to claim 1, its feature exists
In, when sliding or brake under vehicle being at dynamic mode, according to brake pedal aperture and current motor rotating speed, then
Demarcate in conjunction with real vehicle and determine electric power generation moment of torsion, and ensure superposing moment of torsion and expiring of electric braking and original air-pressure brake
Foot ECE brake legislation requirement, controls motor and controls electric power generation according to the power generation torque determined.
7. a driving motor for electric automobile efficiency-optimization control system, it is characterised in that this control system bag
Include judge module, economic model control module and dynamic mode control module,
Described judge module is used for judging that whether power cell of vehicle dump energy state SOC is more than setting value；
Described economic model control module is gone in the economy mode for controlling vehicle when SOC is less than setting value
Sail, i.e. according to the high-efficiency point moment of torsion driven corresponding to the current rotating speed of motor and operator demand's Motor torque to motor
It is controlled, drives car to travel；
Described dynamic mode control module is for being more than setting value in power cell of vehicle dump energy state SOC
Time, control vehicle and travel under dynamic mode, i.e. control to drive motor to enter according to the Motor torque of operator demand
Row moment of torsion exports, and drives vehicle to travel.
Driving motor for electric automobile efficiency-optimization control system the most according to claim 7, it is characterised in that
In described economic model control module, the acquisition process of high-efficiency point moment of torsion is as follows:
A. according to the corresponding interval set, Motor torque and rotating speed are divided an operation interval；
B., N number of operating point is set in each interval, each operating point is carried out electric system efficiency characteristic test；
C. finding the operating point that electric efficiency in each interval is the highest, this electric efficiency high workload point is corresponding
Motor torque is electric efficiency high torque.
Driving motor for electric automobile efficiency-optimization control system the most according to claim 7, its feature exists
In, when vehicle runs in the economy mode, economic model control module vehicle electrical adnexa is carried out drop power or
Closedown processes.
Driving motor for electric automobile efficiency-optimization control system the most according to claim 8, its feature exists
In, when vehicle slides in the economy mode, control motor and generate electricity according to high-efficiency point moment of torsion；When vehicle exists
Under economic model during braking, compare operator demand's Motor torque and high-efficiency point moment of torsion, according to bigger in both
Torque control motors drives vehicle to travel.
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| CN106374795A (en) * | 2016-11-07 | 2017-02-01 | 北京现代汽车有限公司 | Method and device for controlling torque of motor |
| CN106891894A (en) * | 2017-01-26 | 2017-06-27 | 柳州延龙汽车有限公司 | Electric automobile drive control method based on destination |
| CN107139752A (en) * | 2017-05-22 | 2017-09-08 | 奇瑞汽车股份有限公司 | Battery pack power management method, device and electric vehicle |
| CN107738593A (en) * | 2017-08-18 | 2018-02-27 | 宝沃汽车（中国）有限公司 | Control method, device, storage medium and the processor of vehicle continual mileage |
| CN108001271A (en) * | 2017-11-30 | 2018-05-08 | 安徽江淮汽车集团股份有限公司 | Pure electric vehicle electric discharge reminding method and system |
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