摘要
为提高内置式永磁同步电机驱动系统的运行效率,提出了一种内置式永磁同步电机的效率最优直接转矩控制方法。在建立计及定子铁心损耗的内置式永磁同步电机模型的基础上,分析了电机损耗与转矩、转速和定子磁链的关系,导出了不同运行工况条件下效率最优定子磁链幅值的计算式。通过动态调节定子磁链给定值,实现了内置式永磁同步电机直接转矩控制系统的效率最优控制。实验结果表明,给出的优化控制策略在保持直接转矩控制快速动态响应特性的同时,可有效提高电机的运行效率。
In order to increase the efficiency of permanent magnet synchronous motor drives,an optimal-efficiency direct torque control of interior permanent magnet synchronous motors（ IPMSM） is proposed. Firstly,the IPMSM model in the rotor reference frame is established considering iron losses. Then,the function relationship between the power losses and the electromagnetic torque,speed and stator flux linkage is analyzed in detail,and the expression to calculate stator flux amplitude which makes the power losses minimum is derived at different operation conditions. Consequently,the efficiency optimizing control for the direct torque controlled IPMSM drives is achieved by regulating the stator flux linkage reference. The experimental results show that the proposed control method not only preserves the fast torque dynamic response of the conventional direct torque control,but also improves the operation efficiency of the driving system.
作者
张兴华
陈鹏飞
ZHANG Xing-hua CHEN Peng-fei(College of Electrical Engineering and Control Science, Nanjing Tech University, Nanjing 211816, China)
出处
《电工电能新技术》
CSCD
北大核心
2017年第7期57-62,共6页
Advanced Technology of Electrical Engineering and Energy
基金
国家自然科学基金项目(51477073)
江苏省自然科学基金项目(BK20161549)
关键词
内置式永磁同步电机
直接转矩控制
损耗模型
效率优化
interior permanent magnet synchronous motor
direct torque control
power loss model
efficiency optimization
