Abstract This work presents the strategy for vector control of permanent magnet synchronous motor (PMSM) drive fed with a three-phase multi-level voltage source inverter for high performance. In the present work, the traditional 2-level inverter is replaced with a novel reduced switch 5-level inverter, and comparative analysis is done. The implementation of the five-level inverter improves the torque, stator current, and mechanical dynamics of the drive. Here PWM technique is employed to generate the gate pulses for switching devices in a planned sequence to obtain five-level output voltage. The 12 operating modes are defined for reduced switch 5-level inverter that produces voltages as 0, ±2Vdc/3, ±Vdc, ±4Vdc/3 with reduced total harmonics distortion (THD). The close-loop vector control of PMSM with developed five-level inverter is implemented to improve the performance of drive in terms of rise time, settling time, stator current harmonics. The overall system is developed in MATLAB/Simulink and investigations are done in different input command and loading conditions. An extensive simulation study and analysis of results reveal the potential of the present work. This work mainly focuses on the reduction of motor electromagnetic torque pulsations along with improved speed response.

中文翻译：

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一种用于高性能矢量控制 PMSM 驱动的简化开关五电平 VSI

摘要 这项工作提出了永磁同步电机 (PMSM) 驱动器的矢量控制策略，该驱动器采用三相多电平电压源逆变器提供高性能。在目前的工作中，将传统的2电平逆变器替换为一种新型的减少开关的5电平逆变器，并进行了对比分析。五电平逆变器的实施改善了驱动器的转矩、定子电流和机械动力学。这里采用 PWM 技术按计划顺序为开关器件生成栅极脉冲，以获得五电平输出电压。12 种操作模式是为减少开关的 5 电平逆变器定义的，该逆变器产生的电压为 0、±2Vdc/3、±Vdc、±4Vdc/3，并降低了总谐波失真 (THD)。采用开发的五电平逆变器实现 PMSM 的闭环矢量控制，以提高驱动器在上升时间、稳定时间、定子电流谐波方面的性能。整个系统在 MATLAB/Simulink 中开发，并在不同的输入命令和加载条件下进行研究。广泛的模拟研究和结果分析揭示了当前工作的潜力。这项工作主要集中在减少电机电磁转矩脉动以及改善速度响应上。