六相全桥逆变器驱动PMSM的简化模型预测电流控制

doi:10.16180/j.cnki.issn1007-7820.2024.03.005

摘要/Abstract

摘要：

全桥逆变器电机驱动或称开绕组结构虽然兼具相间电气隔离、容错性能好及器件开关频率低等优点,但存在逆变器输出电压矢量多、冗余严重且控制约束等问题。文中以共直流母线供电的六相全桥逆变器驱动六相永磁同步电机为研究对象,提出了一种基于二级矢量优化的简化模型预测电流控制算法,在实现电机定子基波电流有效跟踪控制的同时有效抑制了定子电流的谐波及零序分量。文中基于矢量空间解耦理论对六相全桥逆变器的输出电压矢量进行了分层分析,以定子基波电流控制、谐波及零序电流抑制为准则对逆变器输出的729个电压矢量进行二级优化,得到候选的12个电压矢量,以此为基础设计了模型预测电流控制算法。实验结果表明,该简化模型预测电流控制方法具有良好的动静态性能,能在基波电流控制的同时有效抑制谐波及零序电流分量,可为多相电机驱动系统研究提供一定的理论支撑。

关键词: 六相全桥逆变器, 六相永磁同步电机, 矢量空间解耦, 二级矢量优化, 模型预测电流控制, 基波电流控制, 谐波电流抑制, 零序电流抑制

Abstract:

Although the full bridge inverter motor drive or open winding structure has the advantages of interphase electrical isolation, good fault tolerance and low switching frequency of the device, there are many inverter output voltage vectors, serious redundancy and control constraints.In this study, a simplified model prediction current control algorithm based on two-stage vector optimization is proposed for a six-phase permanent magnet synchronous motor driven by a six-phase full-bridge inverter powered by a common DC bus, which can effectively track and control the stator fundamental current and suppress the harmonic and zero sequence components of the stator current.Based on the criteria of stator fundamental current control, harmonic and zero sequence current suppression, 729 voltage vectors output by inverter are optimized, and 12 candidate voltage vectors are obtained.Based on this, the model predictive current control algorithm is designed.The experimental results show that the simplified model predictive current control method in this study has good dynamic and static performance, and can effectively suppress harmonic and zero sequence current components while controlling fundamental wave current, which can provide theoretical support for the research of polyphase motor drive system.

Key words: six-phase full-bridge inverter, six-phase permanent magnet synchronous motor, vector space decoupling, second-order vector optimization, model predictive current control, fundamental current control, harmonic current suppression, zero sequence current suppression

中图分类号:

TP273

袁庆庆, 吴瑞麒, 马婷, 谢晓彤. 六相全桥逆变器驱动PMSM的简化模型预测电流控制[J]. 电子科技, 2024, 37(3): 34-43.

YUAN Qingqing, WU Ruiqi, MA Ting, XIE Xiaotong. Simplified Model Predictive Current Control for the Six-Phase Full-Bridge Inverter Fed PMSM Drive[J]. Electronic Science and Technology, 2024, 37(3): 34-43.

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电压幅值	矢量数量	电压幅值	矢量数量
0	9	1.931 9	48
0.267 9	12	2.000 0	36
0.517 6	48	2.236 1	48
0.732 1	24	2.394 2	48
0.896 6	12	2.449 5	12
1.000 0	72	2.732 1	24
1.035 3	12	2.828 4	12
1.239 3	48	2.909 3	48
1.414 2	48	3.234 8	24
1.506 0	48	3.346 1	12
1.732 1	36	3.732 1	12
1.880 4	24	3.863 7	12

层数	矢量幅值		幅值差	矢量数
层数	αβ	xy	幅值差	矢量数
1	0.000 0	0.000 0	0.000 0	9
2	0.267 9	3.732 1	-3.464 1	12
3	0.517 6	1.931 9	-1.414 2	48
4	0.732 1	2.732 1	-2.000 0	24
5	0.896 6	3.346 1	-2.449 5	12
6	1.000 0	1.000 0	0.000 0	72
7	1.035 3	3.863 7	-2.828 4	12
8	1.239 3	2.909 3	-1.670 0	48
9	1.414 2	1.414 2	0.000 0	48
10	1.506 0	2.394 2	-0.888 2	48
11	1.732 1	1.732 1	0.000 0	36
12	1.880 4	3.234 8	-1.354 4	24
13	1.931 9	0.517 6	1.414 2	48
14	2.000 0	2.000 0	0.000 0	36
15	2.236 1	2.236 1	0.000 0	48
16	2.394 2	1.506 0	0.888 2	48
17	2.449 5	2.449 5	0.000 0	12
18	2.732 1	0.732 1	2.000 0	24
19	2.828 4	2.828 4	0.000 0	12
20	2.909 3	1.239 3	1.670 0	48
21	3.234 8	1.880 4	1.354 4	24
22	3.346 1	0.896 6	2.449 5	12
23	3.732 1	0.267 9	3.464 1	12
24	3.863 7	1.035 3	2.828 4	12

层数	矢量幅值			矢量数量
层数	αβ	xy	o₁o₂	矢量数量
13	1.931 9	0.517 6	0	12
20	2.909 3	1.239 3	0	12
22	3.346 1	0.896 6	0	12
24	3.863 7	1.035 3	0	6

电机参数	数值
极对数 n_p	5
定子电阻 R_s	0.08 W
d轴电感 L_d	0.33 mH
q轴电感L_q	0.33 mH
磁通ψ_f	0.012 15 Wb
直流母线电压V_dc	270 V
转动惯量 J_m	72.96×10^-6kg×m²
额定转速 n	12 000 r/min
额定定子电流 I_N	12 A
额定转矩 T_N	2.2 N·m
采样频率	20 kHz