摘要
永磁同步电机具有较高的效率和功率密度,在电动汽车驱动系统中广泛应用。电机的d、q轴电感是设计控制系统的重要参数,但重载情况下受磁饱和及交叉饱和影响严重。传统控制技术忽略磁饱和效应,导致转矩控制的精确性不足。采用有限元法分析电机负载时的磁饱和情况,计算考虑磁饱和及交叉饱和的d、q轴电感参数。以此为基础,拟合d、q轴电感和电流关系。设计计及磁饱和的最大转矩电流比MTPA(maximum torque per ampere)控制,使d、q轴参考电流计算中使用的电感随电机电流变化。通过对比,证明计及磁饱和的MTPA控制能够实现输出转矩的精确控制,提高永磁同步电机的动态响应性能。
Permanent magnet synchronous motor （PMSM） with high efficiency and power density is widely used in drive system of Electric Vehicle. D-q axis inductance of the motor is important in the design of a control system, but they are severely affected by magnetic saturation and cross-coupling in over-load situation. Traditional control technology ignores the effect of magnetic saturation and cross-coupling and therefore to decrease the control accuracy of output torque. This paper calculated d-q axis inductance considering magnetic saturation and cross-coupling by finite element analysis（FEA）. Based on this, the relationship between d-q axis inductance and current is fitted. maximum torque per ampere （MTPA） control considering magnetic saturation is designed. The modified make the inductance changed with the motor current when calculate the reference current. By comparison, this paper prove the MTPA control considering magnetic saturation can achieve accurate control of output torque and can improve dynamic response of motor.
出处
《电源学报》
CSCD
2017年第2期94-100,共7页
Journal of Power Supply
基金
国家重点研发计划资助项目(2016YFB0100700)
中央高校基本科研业务费专项资金资助项目(1700219142)~~
关键词
永磁同步电机
有限元
磁饱和
电感参数
最大转矩/电流比控制
permanent magnet synchronous motor（PMSM）i finite element analysis
magnetic saturation
inductance parameter
maximum torque per ampere control
