PMSM Model Predictive Direct Torque Control Based on Novel Weighting Factor Tuning and Computation Delay Compensation

doi:10.11985/2021.01.004

Abstract

Abstract:

In order to tune the weighting factors and solve the computation delay problem for the PMSM model predictive direct torque control (MPC-DTC), a novel factor tuning method and a compensation method are proposed. The proposed techniques have improved the PMSM control performance and enriched the MPC-DTC theories. To tune the weighting factors for the flux and torque,their natures are analyzed firstly. Then, normalization method is applied to the system, removing the units of the two parameters and converting them into the same range. Finally, according to the different response speed of the flux and torque to the voltage variations, a theoretical analysis and tuning method is developed. By contrast to the two-step compensation strategy, the novel delay compensation method is based on dual sampling in one switching period. The implementation of the new method is divided into three steps: delay calculation, current compensation and flux/torque compensation. The experimental results verify that the proposed tuning and compensation methods can ensure that the PMSM has good performance.

Key words: Permanent magnet synchronous motor (PMSM), model predictive direct torque control, weighting factor tuning, computation delay compensation

CLC Number:

TM351

WANG Hailiang, LIU Shimin, CHEN Yongqing, YIN Yucai. PMSM Model Predictive Direct Torque Control Based on Novel Weighting Factor Tuning and Computation Delay Compensation[J]. Journal of Electrical Engineering, 2021, 16(1): 26-33.

Figures/Tables 11

References 19

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数值	参数
额定转速/ (r·min^-1)	3 000
直流电压U_dc/V	300
额定转矩T_l / (N·m)	4.5
绕组电感L_s/H	0.001 7
极对数p	5
转动惯量J/(kg·m²)	0.000 6
摩擦因数B	0.000 3
转子磁链幅值Ψ_f/Wb	0.055
绕组电阻R_s/Ω	0.43
采样频率/kHz	10