Research and Improvement of Permanent Magnet Synchronous Motor Direct Torque Control

doi:10.11985/2018.09.001

Abstract

Abstract:

For the characteristics of permanent magnet synchronous motor DTC in the traditional digital control under , based on the analysis of the amplitude of stator flux and torque angle and torque variation, in order to reduce the torque ripple during stable operation and reduce the start time, study the control performance with null vector DTC, and compared with the traditional DTC from the angle of simulation. The optimal action interval of the null vector is determined, and the lower torque ripple is guaranteed when the motor is running stably, and the motor has a shorter start time.

Key words: Permanent magnet synchronous motor, direct torque control, null vector

CLC Number:

TM351

Feng guihong,Huang he,Liu xiangyan. Research and Improvement of Permanent Magnet Synchronous Motor Direct Torque Control[J]. Journal of Electrical Engineering, 2018, 13(9): 1-7.

Figures/Tables 11

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References 8

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φ	τ	θ₁	θ₂	θ₃	θ₄	θ₅	θ₆
1	1	u₂	u₃	u₄	u₅	u₆	u₁
	0	u₇	u₀	u₇	u₀	u₇	u₀
	-1	u₆	u₁	u₂	u₃	u₄	u₅
0	1	u₃	u₄	u₅	u₆	u₁	u₂
	0	u₀	u₇	u₀	u₇	u₀	u₇
	-1	u₅	u₆	u₁	u₂	u₃	u₄

电机参数	数值
额定相电压/V	257
额定相电流/A	1.5
额定转速/(r/min)	1 500
极对数	2
直轴电感/H	0.113 3
交轴电感/H	0.129 5
定子电阻/Ω	22.5
永磁体磁链/Wb	0.86
额定定子磁链/Wb	0.9
额定转矩/N·m	5.8

零矢量作用范围/ N·m	仿真转矩脉动/ N·m
0	2.98
0.10	2.73
0.20	2.49
0.30	2.37
0.40	1.90
0.41	1.87
0.42	1.85
0.43	1.86
0.44	1.83
0.45	1.80
0.46	1.82
0.50	1.85
0.60	1.81
0.70	1.79
0.80	1.83
0.90	1.81
1.00	1.85

零矢量作用范围/ N·m	仿真起动时间/ms
0	99.7
0.10	96.5
0.20	99.0
0.30	103.0
0.40	108.4
0.43	111.4
0.45	113.9
0.50	119.0
0.60	123.8
0.70	129.0
0.80	130.5
0.90	134.6
1.00	137.8

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