Current Harmonic Suppression Strategy of High-speed Permanent Magnet Synchronous Motor Based on Zero-deviation Quasi-proportional Resonant Control

doi:10.12382/bgxb.2023.1092

Abstract

Abstract:

With the widespread application of high-switching-frequency SiC power devices in the field of high-speed permanent magnet synchronous motor(PMSM)drives,the prominent dead-time effect leads to an increase in the contents of 5th and 7th high-frequency harmonic currents in high-speed domains.Traditional harmonic suppression strategies based on quasi-proportional resonant controllers exhibit significant resonant frequency deviations,which increase with the rise of the fundamental frequency,leading to suboptimal current harmonic suppression.Addressing the issue above,this paper proposes a current harmonic suppression strategy for high-speed PMSM based on zero-deviation quasi-proportional resonant control.By analyzing the frequency deviations of quasi-proportional resonant control under different discretization methods,a discrete transformation expression with zero frequency deviation is constructed,and the basis for setting the control parameters is provided,effectively suppressing the resonant frequency deviation.Both the simulated and experimental results demonstrate that the proposed control strategy achieves zero-deviation resonant frequency control,effectively suppressing the current harmonics of PMSM.

Key words: high-speed permanent magnet synchronous motor, dead-time effect, harmonic suppression, resonant frequency deviation, quasi-proportional resonance

CLC Number:

TM351

XU Guxuan, ZHAO Feng. Current Harmonic Suppression Strategy of High-speed Permanent Magnet Synchronous Motor Based on Zero-deviation Quasi-proportional Resonant Control[J]. Acta Armamentarii, 2025, 46(1): 231092-.

Figures/Tables 18

Fig.1 Diagram of current flow and output voltage under dead-time effect in a single-phase bridge arm

Fig.2 Current and error voltage vector diagram

Fig.3 Bode diagrams of ideal PR controller and QPR controller

Fig.4 Schematic diagram of HSPMSM current harmonic suppression method based on zero-bias QPR

Fig.5 Deviation of resonant frequencies before and after Tustin discretization

Fig.6 Relationship among resonant frequency deviation, expected resonant frequency and sampling period

Fig.7 Comparison of resonant frequencies before and after pre-distortion Tustin discretization

Fig.8 Diagram of d-axis closed-loop control based on QPR controller

Fig.9 Frequency response of open-loop transfer functions under different KR values

Table 1 Parameters of high-speed HSPMSM and control system

参数	数值	参数	数值
d轴电感/H	0.000134	极对数p	1
q轴电感/H	0.000134	额定转速/(r·min^-1)	90000
定子相电阻/Ω	0.02	额定电流/Arms	65
永磁体磁链/Wb	0.018	母线电压/V	500

Fig.10 Simulated results of current harmonic suppression(60000r/min)

Fig.11 FFT analysis results of PMSM phase current(60000r/min)

Table 2 FFT analysis of phase currents before and after harmonic compensation under steady-state at 60000r/min

参数	无补偿	Tustin法	Tustin pre法
总谐波含量/%	9.02	6.35	4.82
5次谐波占比/%	6.52	2.78	0.97
7次谐波占比/%	4.48	2.13	1.02

Fig.12 High-speed PMSM experimental platform based on SiC

Fig.13 Experimental results of PMSM current harmonic suppression(40000r/min)

Table 3 Comparison of dq-axis 6th harmonic amplitudes before and after compensation under steady-state at 40000r/min

电流	无补偿	Tustin	Tustin pre法
d轴电流/A	8.63	4.21	1.59
q轴电流/A	5.22	2.91	0.58

Fig.14 FFT analysis results of PMSM phase current (40000r/min)

Table 4 FFT analysis of phase currents before and after harmonic compensation under steady-state at 40000r/min

参数	无补偿	Tustin	Tustin pre法
总谐波含量/%	10.84	5.92	4.38
5次谐波占比/%	9.60	3.47	1.34
7次谐波占比/%	4.34	2.56	0.53

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