摘要
在电力牵引传动系统中,通常采用基于优化脉宽调制(PWM)的多模式调制策略,以实现牵引电机全速域的平滑运行。为解决不同调制模式间的切换冲击问题,本文首先分析了切换冲击产生的机理,其根本原因是切换前后谐波磁链出现了突变。然后以谐波磁链分析方法为基础,对优化PWM的定子磁链和谐波磁链关系进行定量分析,提出了一种基于谐波磁链偏差幅值的切换策略,只需要根据切换前后的谐波磁链偏差幅值分布情况即可选择最佳切换点。最后通过仿真和实验证明,该策略实现了不同调制模式之间的无冲击切换,且分析方法具有通用性。
Multi-mode modulation strategy based on optimal pulse-width modulation is widely applied in the electric traction drive system so as to achieve smooth full-speed operation.In order to suppress the switching impact between different modulation modes,the mechanism of switching impact is analyzed,and the harmonic flux linkage deviation is the basic cause of switching impact.Based on the harmonic flux linkage analysis method,this paper proposes a switching strategy based on the amplitude of the harmonic flux linkage deviation.It can select the optimal switching point by calculating the amplitude of the flux linkage deviation.Simulation and experimental results verified the effectiveness and versatility of the switching strategy.
作者
周亮
苏和鹏
韩金洋
ZHOU Liang;SU He-peng;HAN Jin-yang(National Key Laboratory for Vessel Integrated Power System Technology, Naval University of Engineering, Wuhan 430033, China;Detachment 82, Unit 92730 of the PLA, Sanya 572016, China)
出处
《电工电能新技术》
CSCD
北大核心
2021年第8期43-50,共8页
Advanced Technology of Electrical Engineering and Energy
基金
国家自然科学基金项目(51977218)。
关键词
低开关频率
电力牵引
优化PWM
多模式调制
切换策略
low switching frequency
electric traction
optimal PWM
multi-mode modulation
switching strategy
