摘要
永磁同步电机模型经过坐标变换之后,d、q轴之间可以实现静态解耦,但动态调节过程中仍然存在交叉耦合问题,且转速越高耦合越严重。另外,电流环内存在的延时会加剧d、q轴耦合,影响电流环动态性能。针对上述问题采用复矢量解耦方法,在电流调节器中引入一个随转速变化的零点,使得此零点可以与电机模型中的极点完全抵消,实现了d、q轴完全解耦,且此方法对电机参数不敏感。为减小电流环延时,在分析延时产生原因的基础上改进了电流采样方式,并且采用双采样双更新策略,延时减小62.5%。仿真结果表明所提方法有效提高了电流环动态性能。
The PMSM model can achieve static decoupling after coordinate transformation,but the cross-coupling problem of d and q axes still exists in the process of dynamic adjustment,and the higher the rotation speed,the more serious the coupling.On the other hand,the delay in the current loop will intensify the coupling of d and q axes and affect the dynamic performance of the current loop.In order to solve the above problem,the complex vector decoupling method was adopted to introduce a zero point in the current regulator that varies with the speed,so that the zero point can completely offset with the pole in the motor model,and the d and q axes can be completely decoupled.And the complex vector decoupling method was insensitive to the motor parameters.In order to reduce the current loop delay,the current sampling method was improved based on the analysis of the causes of delay,and the double-sampling and double-update strategy was adopted to reduce the delay by 62.5%.Simulation results show that the proposed method effectively improves the dynamic performance of the current loop.
作者
包芳泉
郭昊昊
刘彦呈
张珍睿
李浩
BAO Fangquan;GUO Haohao;LIU Yancheng;ZHNAG Zhenrui;LI Hao(Marine Engineering College,Dalian Maritime University,Dalian Liaoning 116026,China)
出处
《微电机》
北大核心
2019年第12期74-80,共7页
Micromotors
基金
国家自然科学基金项目(51979021)
国家自然科学基金项目(51479018)
中央高校基本科研业务费专项资金(3132019317)
辽宁省重点研发计划项目(2017220005)
关键词
永磁同步电机
复矢量
解耦控制
电流环延时
动态性能
permanent magnet synchronous motor
complex vector
decoupling control
current loop delay
dynamic performance
