Zero-Sequence Current Suppression for Open-Winding Permanent Magnet Brushless Motor Driving System Based on Second Order Generalized Integrator

Qing Lu,Yuefei Zuo,Tao Zhang,Lihong Mo

doi:10.1109/access.2020.2975126

Qing Lu, Yuefei Zuo + Show 2 more

Open Access

https://doi.org/10.1109/access.2020.2975126

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Journal: IEEE Access	Publication Date: Jan 1, 2020
Citations: 4	License type: CC BY 4.0

Affiliation: Jiangsu University, Huaiyin Institute of Technology

Abstract

The open-winding driving system can improve power density and torque output capacity of the motor. However, the open-winding topology with a common direct current (DC) power supply provides a path for the zero-sequence current, which contributes to the power loss but not the torque output. The zero-sequence current is produced by the common-mode voltage and zero-sequence components of the back electromotive force (EMF). For the purpose of eliminating the common-mode voltage as well as improving the utilization of DC supply voltage, a 120° decoupling space vector pulse width modulation strategy is adopted. Meanwhile, a proportional unit combined with second order generalized integrator (SOGI) is proposed to suppress the zero-sequence current caused by the zero-sequence components of the back EMF. A test bench is built for the experiment. The effectiveness of the proposed suppression strategy is verified by the experimental results.

Highlights

Permanent magnet synchronous motor (PMSM) has been widely used in the field of electric vehicle driving and industrial applications due to its advantageous features, such as small size, low cost, high power density, and high efficiency [1]–[5]
The main purpose of this paper is to propose an effective zero-sequence current suppression strategy for the open-winding motor
ANALYSIS OF DYNAMIC-STATE EXPERIMENTAL RESULTS In order to verify the performance of zero-sequence current suppression based on proportional and second order generalized integrator (SOGI) regulator in dynamic state, the waveforms of the driving system without and with the proposed regulator are given in Fig. 10 and Fig

Summary

INTRODUCTION

Permanent magnet synchronous motor (PMSM) has been widely used in the field of electric vehicle driving and industrial applications due to its advantageous features, such as small size, low cost, high power density, and high efficiency [1]–[5]. The common-mode voltage generated by the inverter and the zero-sequence current component caused by back EMF harmonics of PMSM can be effectively suppressed. It can be seen from (9) that the phase voltage modulation wave contains fundamental component and odd multiple of 3 harmonics This voltage modulation wave will lead to zero-sequence current in the winding supplied by a single DC power. To suppress the third and ninth harmonics, the proportional and SOGI regulator are adopted to control the zero- sequence current. B. ZERO-SEQUENCE CURRENT SUPPRESSION STRATEGY BASED ON PROPORTIONAL AND SOGI REGULATOR Considering the third and ninth harmonics of the back EMF, the 0-axis equation in zero-sequence circuit can be expressed as: Ri0. The vector control system of open winding motor with zero-sequence current suppression strategy is designed. In the zero-sequence current circuit, the given value of current is zero, and the zerosequence current is suppressed by proportional and SOGI regulator

EXPERIMENTAL VALIDATION

CONCLUSION