一种基于磁链偏差矢量的多模式调制切换策略  

A General Switching Strategy of Multimode Modulation Based on Flux Deviation Vector

作　　者：褚艳红 周明磊[1] 董士帆 王琛琛[1] 王彬 CHU Yanhong;ZHOU Minglei;DONG Shifan;WANG Chenchen;WANG Bin(School of Electrical Engineering,Beijing Jiaotong University,Haidian District,Beijing 100044,China;CRRC Yongji Electric Co.,Ltd.,Yongji 044502,Shanxi Province,China)

机构地区：[1]北京交通大学电气工程学院,北京市海淀区100044 [2]中车永济电机有限公司,山西省永济市044502

出　　处：《中国电机工程学报》2022年第11期4162-4169,共8页Proceedings of the CSEE

基　　金：国家自然科学基金项目(51977006)。

摘　　要：在大功率牵引传动系统中,由于受到逆变器最高开关频率的限制,在全速度范围内一般采用多模式调制。不同调制方式之间的平滑切换对于整个系统的平稳运行有重要影响。文中针对以交流电机为负载的牵引逆变器提出一种基于磁链偏差矢量的多模式切换策略,该方法以切换前后电机转矩冲击最小化为目标,只需要切换时刻的调制比信息即可对任意两种同步调制在不同相位切换前后的定子磁链偏差矢量进行快速计算,并结合多模式调制的实现方式选择偏差矢量幅值最小的最优相位进行切换。该方法在实现切换过程转矩脉动最小的基础上间接实现了电流冲击的优化,避免了复杂的计算和分析,具有非常好的通用性。仿真和实验结果验证了该切换策略的实用性。In the high-power traction drive system,due to the limitation of the maximum switching frequency of the inverter,multi-mode modulation is generally adopted in the full speed range.The smooth switching between different modulation modes has an important impact on the smooth operation of the whole system.A multi-mode switching strategy based on flux deviation vector was proposed for traction inverter with AC motor as load.The goal of this method is to minimize the torque impulse of the motor before and after switching,and only the modulation ratio information of the switching time is needed to quickly calculate the stator flux deviation vectors of any two synchronous modulations before and after switching in different phases.Combined with the realization method of multi-mode modulation,the optimal switching point with the smallest amplitude of deviation vector was selected.This method not only realize the torque ripple in the switching process,but also indirectly realize the optimization of current shock.In addition,it avoid complex calculation and analysis and had very good versatility.The simulation results verified the practicability of the handover strategy.

关 键 词：低开关频率 切换策略 多模式调制 磁链偏差矢量 

分 类 号：U264.9[机械工程—车辆工程]