电源学报

具有中点电位平衡的T型三电平逆变器供电三相永磁伺服电机SPWM-DTC控制

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汪文豪 , 周扬忠中国电源学会高级会员

电源学报 | 电机驱动与控制 2026,24(7): 295-304

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电源学报 |电机驱动与控制 2026 , 24 (7) : 295 -304

具有中点电位平衡的T型三电平逆变器供电三相永磁伺服电机SPWM-DTC控制

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汪文豪, 周扬忠中国电源学会高级会员

作者信息

福建省新能源发电与电能变换重点实验室（福州大学），福州　350116

通讯作者:

周扬忠（1971—　），男，中国电源学会高级会员，通信作者，博士，教授。研究方向：现代调速系统，新能源发电系统。E-mail：zhty_75313@sina.com。

作者简介:

汪文豪（2000—　），男，硕士研究生。研究方向：现代调速系统。E-mail：220127092@fzu.edu.cn。

SPWM-DTC for Three-phase PMSM with Neutral Point Voltage Balance Powered by T-type Three-level Inverter

Wenhao WANG, Yangzhong ZHOU Senior Member, CPSS

Affiliations

Fujian Key Laboratory of New Energy Generation and Power Conversion, Fuzhou University, Fuzhou 350116, China

出版时间: 2026-07-30 doi: 10.13234/j.issn.2095-2805.2026.7.295

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摘要

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为了解决T型三电平逆变器供电的三相永磁伺服电动机驱动系统的电容电压不平衡问题，提出一种基于零序电压注入的载波调制直接转矩控制策略。首先，通过电机模型计算完成了直接转矩控制策略的构建；其次，由预期电压值进行坐标变换得到参与脉冲宽度调制PWM（pulse width modulation）控制的调制电压，实现了载波调制与直接转矩控制的结合；最后，为了实现中点电位的平衡控制，根据上下电容电压的采样差值计算和校正注入的零序电压值。实验结果表明，所提控制策略能够有效实现转矩脉动的减小和中点电压的平衡控制。

关键词

T型三电平逆变器 / 永磁伺服电机 / 直接转矩控制 / 零序电压 / 中点电位平衡

Abstract

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To tackle the challenges of uneven capacitor voltage in the propulsion setup of a three-phase permanent magnet servomotor driven by a T-type three-level inverter, a direct torque control strategy based on zero-sequence voltage injection with carrier modulation is proposed. Firstly, the direct torque control strategy is constructed by motor model calculation. Secondly, the modulation voltage involved in pulse width modulation (PWM) control is obtained by coordinate transformation from the expected voltage, which realizes the combination of carrier modulation and direct torque control. Finally, in order to realize the balanced control of the midpoint potential, the zero-sequence voltage injected is calculated and corrected according to the sampling difference of the upper and lower capacitor voltages. The experimental data demonstrates that the suggested control approach effectively achieves a reduction in torque fluctuations and maintains balanced control of neutral point voltage.

Key words

T-type three-level inverter / permanent magnet servo motor / direct torque control / zero-sequence voltage / neutral point potential balance

引用本文

汪文豪, 周扬忠中国电源学会高级会员. 具有中点电位平衡的T型三电平逆变器供电三相永磁伺服电机SPWM-DTC控制. 电源学报, 2026 , 24 (7) : 295 -304 . DOI: 10.13234/j.issn.2095-2805.2026.7.295

Wenhao WANG, Yangzhong ZHOU. SPWM-DTC for Three-phase PMSM with Neutral Point Voltage Balance Powered by T-type Three-level Inverter[J]. Journal of Power Supply, 2026 , 24 (7) : 295 -304 . DOI: 10.13234/j.issn.2095-2805.2026.7.295

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2026年第24卷第7期

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doi: 10.13234/j.issn.2095-2805.2026.7.295

接收时间：2024-06-03
首发时间：2026-10-29
出版时间：2026-07-30

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收稿日期：2024-06-03
修回日期：2024-09-11
录用日期：2024-09-20

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作者信息

福建省新能源发电与电能变换重点实验室（福州大学），福州　350116

通讯作者:

周扬忠（1971—　），男，中国电源学会高级会员，通信作者，博士，教授。研究方向：现代调速系统，新能源发电系统。E-mail：zhty_75313@sina.com。

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2种不同金属材料的力学参数

科 Family	属数 Number of genus	种数 Number of species	占总种数比例 Percentage of total species (%)	属 Genus	种数 Number of species	占总种数比例 Percentage of total species (%)
鹅膏菌科Amanitaceae	2	11	5.26	鹅膏菌属 Amanita	10	4.78
小菇科 Mycenaceae	2	12	5.74	丝盖伞属 Inocybe	5	2.39
多孔菌科 Polyporaceae	8	14	6.70	蜡蘑属 Laccaria	5	2.39
红菇科 Russulaceae	3	23	11.00	小皮伞属 Marasmius	6	2.87
				小菇属 Mycena	11	5.26
				光柄菇属 Pluteus	5	2.39
				红菇属 Russula	17	8.13
				栓菌属 Trametes	5	2.39

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