Multi-mode modulation strategy and switching method of electric locomotive traction drive system

被引：0
|
作者：
Yuan G.-F. [1 ,2 ]
Chen D. [1 ]
Zheng C.-Y. [1 ,2 ]
机构：
[1] Inverter Technologies Engineering Research Center of Beijing, North China University of Technology, Beijing
[2] Collaborative Innovation Center of Key Power Energy-Saving Technologies in Beijing, North China University of Technology, Beijing
来源：
Dianji yu Kongzhi Xuebao/Electric Machines and Control | 2021年 / 25卷 / 01期
关键词：
Flux obeserver; Multi-mode PWM; Selective harmonic pulse width modulation; Switching strategy; Traction system; Unified design;
D O I：
10.15938/j.emc.2021.01.013
中图分类号：
学科分类号：
摘要：
In the AC electric locomotive traction drive system, due to the low switching frequency, the multi-mode modulation strategy and switching method of traction system were studied, and the unified frame design method of motor control algorithm and multi-mode modulation strategy was realized. According to the characteristics of different synchronous modulation, a multi-mode PWM modulation strategy from asynchronous modulation to synchronous space vector pulse width modulation(SVPWM), then to synchronous selective harmonic pulse width modulation(SHEPWM) modulation up to square wave modulation was proposed. The switching strategy between different modes was studied and a method for three-phase switching simultaneously was used. In order to avoid the phase angle matching problem between motor control strategy and multi-mode PWM, a unified framework design method that can simplify the implementation complexity of the algorithm was proposed and the design of current regulator and flux observer under low sampling rate was also discussed. Finally, the stable operation of electric locomotive in full speed range under traction condition without speed sensor was realized in the low-power traction experimental platform. Effectiveness of the algorithm is verified by the experimental results. © 2021, Harbin University of Science and Technology Publication. All right reserved.
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页码：126 / 135
页数：9
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