Dual-motor parallel efficiency optimal control method for electric vehicle
An electric vehicle, optimal control technology, applied in the direction of electric vehicles, motors, control drives, etc., can solve the problems of high control strategy complexity, increase system loss, reduce efficiency, etc., to improve calculation speed and real-time performance, and improve efficiency , the effect of simplifying the loop comparison process
Inactive Publication Date: 2020-12-15
包头长安永磁电机有限公司
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Problems solved by technology
However, the existing technology focuses on the optimization of the external characteristics of the system and the distribution of the motor operating point, and the control strategy is highly complex and time-consuming
On the other hand, the existing control strategy ignores the influence of motor temperature rise on motor operating conditions and efficiency. In practical applications, due to the influence of temperature rise on motor efficiency, the existing control strategy cannot make the dual motor work with optimal efficiency. mode, which increases system losses and reduces efficiency
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[0031] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the figures in the embodiments of the present invention. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0032] The purpose of the present invention is to solve the problem of low efficiency in the existing dual-motor parallel drive control system, and propose an optimal control strategy for the dual-motor parallel efficiency of an electric vehicle. Combine below Figure 1-Figure 4 Specific embodiments of the present invention will be described.
[0033] The schematic diagram of the mechanical topology structure of the parallel dual-motor system described in the ...
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The invention discloses a dual-motor parallel efficiency optimal control method for an electric vehicle, and belongs to the field of multi-motor cooperative control. According to the dual-motor parallel efficiency optimal control method, through an efficiency optimal torque distribution algorithm, it is ensured that double-module motors connected in parallel work near the rated rotating speed at the same time, and the overall efficiency of the system is improved; and meanwhile, according to the control strategy, an in-vehicle temperature sensor can be used for collecting motor temperature information, and motor efficiency correction is conducted on the basis of the motor temperature information so that a dual-motor driving system can work in a working mode with the optimal efficiency at different working temperatures. Through the efficiency optimal torque distribution algorithm, it is ensured that the double-module motors connected in parallel work near the rated rotating speed at thesame time, and the overall efficiency of the system is improved. In addition, the in-vehicle temperature sensor can be used for collecting the motor temperature information, and motor efficiency correction is conducted on the basis of the motor temperature information so that the dual-motor driving system can work in the working mode with the optimal efficiency at different working temperatures, and the defects in the prior art are overcome.
Description
technical field [0001] The invention relates to an optimal control method for parallel efficiency of dual motors of an electric vehicle, belonging to the field of multi-motor coordinated control. Background technique [0002] Electric vehicles can solve the increasingly severe energy crisis and environmental pollution problems. With its own characteristics of zero emission and no pollution, electric vehicles have attracted the attention of many enterprises and research institutions at home and abroad. With the development of electric vehicles, the demand for motor performance continues to increase. The traditional single-motor drive system can no longer meet the needs of the vehicle system for low-speed, high-torque, high-speed and high-power, while the modular cascaded motor system can effectively solve the above problems. [0003] As an important part of the modular cascaded motor system, the dual-motor cascaded drive control system can match two motors with different pe...
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IPC IPC(8): B60W10/08B60W40/00B60L15/20
CPCB60L15/2045B60W10/08B60W40/00Y02T10/64Y02T10/72
Inventor 张继鹏苏锦智刘慧博孙建国付荣华郑永孙瑞杰
Owner 包头长安永磁电机有限公司