
科学技术与工程

中国技术经济学会
一种降低开关磁阻电机转矩脉动的新型转矩分配函数控制策略
A Novel Torque Sharing Function Control Strategy for Reducing Torque Ripple in Switched Reluctance Motors
由于开关磁阻电机特殊的双凸极结构,导致其在运行过程中会存在较大的转矩脉动,为降低换相期间的峰值电流和转矩脉动,提出了一种新型转矩分配函数(torque sharing function, TSF)控制方法。首先,考虑转矩与电感之间的关系,以电感边界点将交换区分为两个子区间,并在不同的区间设计了不同的TSF曲线。其次,随着电机的转速和负载增加,固定的重叠角会降低电机的效率,提出了一种在线重叠角优化控制策略。最后,通过仿真和实验结果表明,与传统立方型转矩分配函数相比,在负载为5 N·m,转速分别为500 r/min、1 000 r/min下,本文方法的转矩脉动和电流峰值分别降低了3.6%、12%和1.1 A、3.2 A。所提方法能够有效地减小转矩脉动和电流峰值。
Due to the special double salient pole structure of switched reluctance motor, there will be large Torque ripple during operation. In order to reduce the peak current and torque ripple during phase commutation, a novel TSF (torque sharing function) control method is proposed. Firstly, considering the relation between torque and inductance, the exchange was divided into two subintervals by inductance boundary points, and different TSF curves were designed in different intervals. Secondly, with the increase of motor speed and load, the fixed overlap Angle will reduce the efficiency of the motor, and an online overlap Angle optimization control strategy was proposed. Finally, the simulation and experimental results show that compared with the traditional cubic torque distribution function, the torque ripple and current peak value of the proposed method are reduced by 3.6%, 12%, and 1.1 A, 3.2 A respectively at a load of 5 N·m and a speed of 500 r/min and 1 000 r/min respectively. The proposed method can effectively reduce torque ripple and current peak value.
开关磁阻电机 / 转矩分配函数 / 转矩脉动抑制 / 峰值电流 / 区间分段 / 重叠角优化
switched reluctance motor / torque sharing function / torque ripple suppression / peak current / interval segmentation / overlap angle optimization
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