内置式永磁同步电机弱磁控制技术的研究

doi:10.16180/j.cnki.issn1007-7820.2020.02.003

摘要/Abstract

摘要：

针对电动汽车所使用的内置式永磁同步电机在不同工况下的转速与转矩需求,基于内置式永磁同步电机标幺化数学模型,文中设计了在线计算法最大转矩电流比控制与电压反馈法弱磁控制相结合的控制策略,以便对电机进行弱磁控制。以一台2.8 kW永磁同步电机作为研究对象,使用MATLAB/Simulink对所设计控制策略进行了仿真研究,并搭建弱磁控制系统实验平台并进行验证。仿真及实验结果表明,该控制策略具有较好的鲁棒性与较快的转矩响应速度,可以满足电机不同工况下的转速转矩需求。

关键词: 电动汽车, 内置式永磁同步电机, 最大转矩电流比, 弱磁控制, 空间矢量控制, 电压反馈法

Abstract:

In order to meet the speed and torque requirements of interior permanent magnet synchronous motor used in electric vehicles under different working conditions, a control strategy based on standardized mathematical model combining with on-line calculation method of Maximum Torque Per Ampere control and voltage feedback method of flux-weakening control was designed. Taking a 2.8 kW permanent magnet synchronous motor as the research object, the control strategy was simulated by using MATLAB/Simulink, and the experimental platform of flux-weakening control system was established. Simulation and experimental results demonstrated that the control strategy had good robustness and faster torque response speed, which could meet the requirements of motor speed and torque under different working conditions.

Key words: electric vehicle, nterior permanent magnet synchronous motor, maximum torque per ampere, flux-weakening control strategy, space vector control, voltage feedback method

中图分类号:

TP273

石讯,易映萍,王晓丽. 内置式永磁同步电机弱磁控制技术的研究[J]. 电子科技, 2020, 33(2): 14-19.

SHI Xun,YI Yingping,WANG Xiaoli. Research on Flux Weakening Control Technology of Interior Permanent Magnet Synchronous Motor[J]. Electronic Science and Technology, 2020, 33(2): 14-19.

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名称	符号	数值
额定电压/V	U	72
额定功率/kW	P	2.8
额定转速/r·min^-1	N	2 500
最大转速/r·min^-1	N_max	4 800
额定转矩/N·m	T	11
极对数	P_n	4
直轴电感/μH	L_d	299.82
交轴电感/μH	L_q	457.33
转子磁链/Wb	ψ_f	0.029 25
定子相电阻/Ω	R_s	0.011