基于电流转矩协同控制的开关磁阻电机新型直接瞬时转矩控制策略
Current-torque Coordinated Control Based Direct Instantaneous Torque Control Strategy for Switched Reluctance Motor
任浩天 1甘醇 1曲荣海 1王双红 1孙剑波1
作者信息
- 1. 强电磁工程与新技术国家重点实验室(华中科技大学电气与电子工程学院),湖北省 武汉市 430074
- 折叠
摘要
该文针对开关磁阻电机(switched reluctance motor,SRM)的直接瞬时转矩控制(direct instantaneous torque control,DITC)展开研究.由于 SRM 的强非线性及数字控制器控制带宽的有限性,传统DITC存在电流脉冲大、系统损耗高、转矩脉动大等问题.针对这些问题,该文在脉冲宽度调制DITC(pulse width modulation,PWM-DITC)基础上提出一种基于电流转矩协同控制的新型DITC策略.该策略创新性地引入电流误差作为开关导通依据之一,在控制转矩的同时实现对电流脉冲的抑制,完成平稳换相.同时,该策略在开关导通规则中设计与具体工况相关的参数,降低转矩脉动.在此基础上,该文又提出一种开通角迭代更新方案,实现系统效率提升.相比传统 PWM-DITC,该策略可有效降低换相区间内电流脉冲,提升系统运行效率,同时显著降低转矩脉动.最后,通过实验验证所提策略的有效性.
Abstract
In this paper,the direct instantaneous torque control(DITC)optimization of switched reluctance motor(SRM)is studied.Due to the strong nonlinearity of SRM and the limited control bandwidth of digital controller,the traditional DITC has the problems of large current pulse,high system loss and large torque ripple.Aiming at these problems,this paper proposes a current-torque coordinated control based DITC strategy on the basis of pulse width modulation DITC(PWM-DITC).The strategy innovatively introduces the current error as one of the switching conduction bases to realize the coordinated control of current and torque and complete the smooth commutation.At the same time,this paper designs parameters related to specific working conditions in the switch conduction rules,thereby reducing torque ripple.On this basis,this paper proposes a real-time modulation scheme of turn-on angle,which improves the system efficiency.This strategy effectively reduces the current pulse in the commutation interval,improves the system operating efficiency,and significantly reduces the torque ripple.Finally,the proposed strategy is verified by the experimental prototype platform.
关键词
开关磁阻电机/电流脉冲抑制/转矩脉动抑制/效率提升/直接瞬时转矩控制Key words
switched reluctance motor/current pulse reduction/torque ripple suppression/efficiency improvement/direct instantaneous torque control引用本文复制引用
基金项目
国家自然科学基金项目(52177043)
湖北省自然科学基金杰出青年项目(2021CFA076)
出版年
2024
国家科技期刊平台
NSTL
万方数据