Current Loop Parameters Design for PMSM with Filter Based on Multi-objective Optimization Method

doi:10.11985/2023.03.018

Abstract

Abstract:

The LC filter is effective to reduce the high-frequency current harmonics of permanent magnet synchronous motor(PMSM), the performance of which differs from the system without filter and is also greatly affected by the current loop PI parameters. In order to improve the performance of the inverter side current feedback control system, a multi-objective optimization design method for the current loop PI parameters is proposed. The open loop transfer function of the current loop with the inverter side current feedback is derived, and the influences of the current loop parameters on the system stability, dynamic performance, bandwidth and resonant peak value are analyzed. Furthermore, the bandwidth, overshoot and resonance peak are determined as the optimization objectives, and their constraints are given. Moreover, the current loop parameters are solved by the genetic algorithm. The system simulation is carried out based on the designed current loop parameters, and the performance is compared with that of the two traditional design methods. The simulation results verify the proposed method. Compared with the traditional methods, the multi-objective optimization method can reduce the overshoot, resonance peak and high-frequency current harmonics, and improve the current loop bandwidth and current tracking capability.

Key words: Permanent magnet synchronous motor, filter, current loop parameters, multi-objective optimization

CLC Number:

TM351

XU Jiaqun, CHEN Tengyu. Current Loop Parameters Design for PMSM with Filter Based on Multi-objective Optimization Method[J]. Journal of Electrical Engineering, 2023, 18(3): 164-174.

Figures/Tables 21

性能指标	Ziegler-Nichols	零极点相消	多目标优化
	K_p=0.675	K_p=0.63	K_p=0.556
	K_i=810.3	K_i=96	K_i=107.04
相位裕度P_m/(°)	31.8	40.9	41
谐振峰值M_r/dB	34.5	33.8	32.7
超调σ(%)	37.72	0	0.83
上升时间t_r/ms	2.4	7.5	6.8
调节时间t_s/ms	17.4	12.7	9.5
带宽 $ω b$ /(rad/s)	721	305	358

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参数	数值
额定功率P_n/kW	1.1
额定转速n/(r/min)	500
定子电感L_s/mH	1.8
相电阻R_s/Ω	0.32
开关周期T_s/ms	0.1
极对数p	4
滤波电感L_f/mH	0.3
滤波电容C_f/μF	80