The invention relates to the technical field of electric vehicle motors, and provides a motor system efficiency correction method and device for an electric vehicle. The method comprises the steps ofdetermining the maximum available power of a motor system in a working process of a motor of the electric vehicle, according to the change condition of the maximum available power in the working process of the motor, determining a corresponding target motor rotating speed when power compensation needs to be carried out,querying a motor system efficiency rack table according to the target motor rotating speed to determine a corresponding target initial motor correction coefficient, the motor system efficiency rack table storing a plurality of groups of mutually corresponding motor rotating speeds and initial motor correction coefficients, and correcting the determined target initial motor correction coefficient. Therefore, by correctly finding the correction opportunity of the coefficient,the corrected motor correction coefficient is more suitable for the actual vehicle driving condition, and the correction accuracy of the motor system efficiency is improved.
本发明涉及电动汽车电机技术领域,提供一种电动汽车的电机系统效率修正方法及装置,其中该方法包括:确定在电动汽车的电机工作过程中电机系统的最大可用功率;根据所述最大可用功率在所述电机工作过程中的变化情况,确定需要进行功率补偿时所对应的目标电机转速;根据所述目标电机转速查询电机系统效率台架表,以确定相应的目标初始电机修正系数,其中所述电机系统效率台架表存储有多组相互对应的电机转速与初始电机修正系数;以及修正所确定的目标初始电机修正系数。由此,通过找准系数的修正时机,使得经修正的电机修正系数更贴合于实际车辆驾驶工况,提高电机系统效率的修正精确度。
Motor system efficiency correction method and device for electric vehicle
电动汽车的电机系统效率修正方法及装置
2020-10-02
Patent
Elektronische Ressource
Chinesisch
IPC: | B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen |
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