摘要
在内置式永磁同步电机电压反馈法弱磁控制中,传统电流相角法弱磁控制存在动态性能差、转矩波动较大的问题。本文从稳态和暂态两方面分析,阐述了传统算法导致上述问题的原因,提出一种基于电流相角的自适应弱磁控制策略。通过小信号分析,将电压幅值对电流相角求导,推导出自适应增益值,对电流相角实现在线调节。实验结果表明,采用所提出弱磁控制策略有效地抑制了弱磁区d轴电流和转矩波动,提高了直流母线电压的利用率。
In the voltage feedback flux-weakening control of interior permanent magnet synchronous motor,the traditional flux-weakening control based on current phase angle has some problems,such as poor dynamic performance and large torque fluctuation in flux weakening region.The causes of the above problems are analyzed from steady state and transient state,and an adaptive flux-weakening control strategy based on current phase angle is proposed in this paper.The adaptive gain can be obtained by deriving the voltage amplitude from the current phase angle in small-signal analysis,and the current phase angle can be adjusted online.The experimental results show that the proposed flux-weakening control strategy can effectively suppress the d-axis current,torque fluctuation and improve the utilization of DC bus voltage.
作者
李涛
谷鑫
李新旻
王志强
张国政
LI Tao;GU Xin;LI Xin-min;WANG Zhi-qiang;ZHANG Guo-zheng(Tianjin Engineering Center of Electric Machine System Design and Control,Tianjin Polytechnic University,Tianjin 300387,China)
出处
《电工电能新技术》
CSCD
北大核心
2019年第10期38-45,共8页
Advanced Technology of Electrical Engineering and Energy
基金
国家自然科学基金项目(51690183
51807140)
关键词
内置式永磁同步电机
电压反馈法弱磁控制
电流相角
自适应控制
interior permanent magnet synchronous motor
voltage feedback flux-weakening control
current phase angle
adaptive control
