The invention discloses an electric vehicle motor controller energy conversion system and a control method, the system comprises a DC/DC converter and an inverter, a DC bus is arranged between the DC/DC converter and the inverter, and the DC/DC converter is configured with a DC/DC converter control system; the control system comprises a direct-current bus given generator and a direct-current bus given voltage amplitude limiting module and is used for controlling and generating a direct-current bus voltage given value; specifically, the collected real-time working rotating speed of the motor iscompared with a high threshold value and a low threshold value, the DC/DC converter adjusts the given voltage value of the direct-current bus according to the comparison result, and in the adjustingprocess, the loss of a motor controller system can be reduced, and the system efficiency can be improved. Therefore, the voltage of the battery can be increased, the voltage of the direct-current buscan be stabilized, the problems that the voltage of the battery is low and unstable can be solved, the torque output capacity of the motor can be improved, and the power performance of the electric automobile is improved.
本发明公开了一种电动汽车电机控制器能量变换系统及控制方法,该系统包括DC/DC变换器和逆变器,在DC/DC变换器和逆变器之间是直流母线,所述DC/DC变换器配置有DC/DC变换器控制系统;该控制系统包括直流母线给定发生器和直流母线给定电压限幅模块,用于控制产生直流母线电压给定值;具体是将采集的电机实时工作转速与高、低门限值进行比较,根据比较结果,DC/DC变换器对直流母线给定电压值进行调整,在调整过程中,有利于减小电机控制器系统损耗,提升系统效率。因此,本发明可实现电池电压的提升并稳定直流母线电压,能够解决电池电压偏低和不稳定的问题,有利于提升电机转矩输出能力,提升电动汽车的动力性能。
Electric vehicle motor controller energy conversion system and control method thereof
一种电动汽车电机控制器能量变换系统及其控制方法
2020-12-25
Patent
Electronic Resource
Chinese
IPC: | H02P CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS , Steuern oder Regeln von elektrischen Motoren, elektrischen Generatoren, dynamoelektrischen Umformern / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen |
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