基于前馈搜索法的IPMSM最大转矩电流比控制  

Maximum Torque Per Ampere Control Based on Feedforward Search Method for IPMSM

作　　者：林建华 赵世伟[1] 杨向宇[1] LIN Jianhua;ZHAO Shiwei;YANG Xiangyu(School of Electric Power Engineering,South China University of Technology,Guangzhou 510640,China)

机构地区：[1]华南理工大学电力学院,广州510640

出　　处：《微电机》2024年第7期24-29,59,共7页Micromotors

基　　金：广东省自然科学基金(2018A0303130221)。

摘　　要：针对传统搜索法MTPA中存在搜索速度慢的问题,提出一种结合公式法和搜索法的前馈搜索法MTPA控制策略。为了提高系统的动态性能,该控制策略用分段函数代替复杂的d-q轴电流分配公式,得到计算直轴电流前馈量的通用式。然后,在前馈量的基础上进行在线搜索,获取最优直轴电流指令,并利用历史工作数据修正分段函数,提高前馈精度。最后,分析了前馈搜索法的搜索过程,并设置搜索阈值避免搜索法在稳态时的周期性震荡,仿真和实验结果验证了该策略的有效性。Aiming at the problem of slow search speed in traditional search method Maximum Torque per Ampere(MTPA),an improved search method MTPA control strategy based on feedforward compensation was proposed.In order to improve the dynamic performance of the system,this strategy replaced the distribution formula of the direct axis current with a piecewise function,and obtained a universal formula for calculating the feedforward of the direct axis current.On the basis of feedforward,perform extreme value search method to obtain the optimal direct axis current,and find the optimal direct axis current command.Then,used historical working data to correct the segmented function to improve feedforward accuracy.Finally,the search process of the feedforward search method was analyzed,and a search threshold was set to avoid periodic oscillations of the search method in steady state.Simulation and experimental results verified the effectiveness of this strategy.

关 键 词：IPMSM 最大转矩电流比 搜索法 效率优化 

分 类 号：TM341[电气工程—电机] TM351[自动化与计算机技术—检测技术与自动化装置] TP273[自动化与计算机技术—控制科学与工程]