摘要
针对低速纯电动汽车感应电机转矩波动引起启动阶段传动系抖动的问题,在感应电机矢量控制技术的基础上深入分析了电流谐波、磁场谐波产生转矩波动的机制,建立了转矩波动的数学模型;针对转子磁链和定子电流设计了滑模控制器对转矩波动进行直接的控制,并对7.5k W的小功率动力电机进行仿真。仿真结果表明,与传统的速度滑模调节器相比,该方法能够有效地抑制低频段转矩波动,实现磁链与转矩的快速调节,明显提升了动态性能。
A problem encountered with low-speed electric vehicles is the vibration caused by torque ripples of induction motor during the start time. The vibration can be damped via active control methods. This paper describes the direct relationship between current harmonies and torque ripples and constructs a mathematical model of the torque ripples for induction motor. A vector control methods with sliding mode controller （SMC） is designed and im- plemented directly for current and flux so that the torque ripples will be directly damped. Simulation results with 7.5kW motor shows that the designed control method is superior to traditional SMC for speed. The torque ripplesare reduced and the control performance is apparently advanced.
出处
《机电一体化》
2016年第7期17-21,共5页
Mechatronics
