Distribution method for driving torque of dual-motor electric vehicle
A technology of electric vehicles and driving torque, which is applied in the direction of electric vehicles, motors, control drives, etc., can solve the problems of poor economy and low efficiency of the whole vehicle, and achieve the effect of reducing energy consumption
Inactive Publication Date: 2018-11-06
SHANDONG UNIV OF TECH
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Problems solved by technology
However, under urban driving conditions, the power required by the vehicle is small. Because the traditional single-motor electric vehicle has only one motor with high power, it generally runs in the low-efficiency range of the motor, and the vehicle economy is poor; while the dual-motor electric vehicle Since the electric vehicle is matched with two motors with lower power, it can be driven independently by a single motor to improve the working efficiency of the motor and improve the economy of the whole vehicle.
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[0052] The present invention will be further described below in conjunction with the accompanying drawings.
[0053] In this embodiment, a certain type of dual-motor front and rear axle independent drive electric vehicle of a certain company in Shandong Province is taken as the research object. The configuration of the vehicle is as follows figure 1 As shown, the vehicle parameters are shown in Table 1, the driving motor parameters are shown in Table 2, the power battery parameters are shown in Table 3, and the efficiency diagram of the driving motor is shown in figure 2 shown.
[0054] Table 1 vehicle parameters
[0055]
[0056] Table 2 Drive Motor Parameters
[0057]
[0058] Table 3 power battery parameters
[0059]
[0060] For traditional multi-power source vehicles, the rule-based control strategy has been most widely used because of its easy implementation.
[0061] For this research object, according to the AC asynchronous motor efficiency diagram, a rul...
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The invention discloses a distribution method for the driving torque of a dual-motor electric vehicle and belongs to the technical field of new energy vehicles. According to the method, based on a current driving working condition of the vehicle and a current working state of motors, the driving torque can be reasonably distributed, it is guaranteed that the energy consumption of a dual-motor system is lowest at any moment, and the economical efficiency of the vehicle is improved. The method comprises the steps that firstly, by analyzing the energy consumption of a power battery, a target function of torque distribution of the double motors is pre-determined; secondly, the efficiency functions of both the motors are determined; then, according to the efficiency functions of the motors andthe total torque to be distributed, an initial point and an end point of saltatory searching are determined; finally, according to the initial point and the end point of saltatory searching, in combination with an actual working condition, searching is conducted in the efficiency functions of the motors, and after searching is completed, an optimal torque value is output.
Description
technical field [0001] The invention belongs to the technical field of new energy vehicles, and relates to a pure electric vehicle energy management method, in particular to a dual-motor electric vehicle driving torque distribution method. Background technique [0002] After several years of development, my country's new energy vehicle industry has begun to take shape, and a number of competitive electric vehicle companies have emerged. Currently, pure electric vehicles on the market are mainly driven by a single motor. However, under urban driving conditions, the power required by the vehicle is small. Because the traditional single-motor electric vehicle has only one motor with high power, it generally runs in the low-efficiency range of the motor, and the vehicle economy is poor; while the dual-motor electric vehicle Since the electric vehicle is matched with two motors with lower power, it can be independently driven by a single motor to improve the working efficiency of...
Claims
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IPC IPC(8): B60L15/20
CPCB60L15/20B60L2220/42B60L2240/421B60L2240/423Y02T10/64Y02T10/72
Inventor 李军伟柳晓东王德诚
Owner SHANDONG UNIV OF TECH