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| The Unified Modulation Scheme of Open-End Winding PMSM with Common DC Bus under the Open-Phase Fault Considering the Suppression of Zero-Sequence Current |
| Lü Kangfei1, 2, Dong Xinwei1, Liu Lili3, Hu Wei4, Nian Heng4 |
1. School of Electrical and Power Engineering China University of Mining and Technology Xuzhou 221166 China;
2. College of Physics and Electronic Electrical Engineering Huaiyin Normal University Huaian 223300 China;
3. School of Mechanical Electrical Engineering Xuzhou University of Technology Xuzhou 221018 China;
4. College of Electrical Engineering Zhejiang University Hangzhou 310027 China |
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Abstract The research of the continuous fault-tolerant operation under open-phase fault is vital for the high reliability of the motor-drive system. However, in the open-phase fault of open-end winding permanent-magnet synchronous motor (OW-PMSM) system with common dc bus, the zero-sequence current (ZSC) cannot be suppressed with the conventional schemes. On this basis, a novel control scheme is proposed for the OW-PMSM system with open-phase fault. By investigating the relationship among the currents in synchronous coordinate system, the currents in stationary coordinate system and ZSC, the proportional resonance controller-based control scheme is proposed to suppress the 2nd and 4th harmonic currents in ZSC. Moreover, according to the distribution of voltage vectors under the open-phase fault, a unified modulation scheme, which can be applied to simplify the modulation process by synthesizing the reference voltage with two orthogonal voltage vectors, is proposed. Finally, the experimental platform of the OW-PMSM system is built to validate the effectiveness of the proposed control scheme.
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Received: 16 April 2019
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2020, Vol. 35 
