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Abstract In order to further improve the capacity of the speed regulating system and reduce the output harmonic and torque ripple, this paper applies the multilevel inverter technology in multiphase machine. The speed regulating system with 30°-shift double-star winding of permanent magnet synchronous motor (PMSM) is provided, which is fed by eleven-level cascaded multilevel inverter. The distributions of voltage space vectors in different orthogonal spaces are analyzed in detail. Meanwhile, the four-vector space vector pulse width modulation (SVPWM) algorithm is presented based on two cascaded inverters. In Matlab simulation, the PMSM vector control system of 30°-shift double-star winding driven by the multilevel inverter is compared with the vector control system supplied with the two-level inverter. Regarding the former control system, its performance of torque and steady current is superior to the latter, and the total harmonics distortion (THD) of steady current is only 2.68%. The experimental results based on DSP show that the output waveforms of cascaded multilevel inverter are close to sinusoidal wave. Besides, the ripples of the torque are small and the harmonic content of steady current is low. It has reached the expected control effect, which verifies the feasibility of the proposed method.

Key words： Cascaded multilevel inverter permanent magnet synchronous motor of 30°-shift double-star winding voltage space vector control

Received: 29 January 2016 Published: 02 December 2016

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TM464

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	Articles by authors
	Lu Zheng
	Ouyang Honglin
	Meng Chao
	Zhu Siguo

Cite this article:

Lu Zheng,Ouyang Honglin,Meng Chao等. Vector Control System of Multilevel Inverter Double Star Winding Shifted by 30°Permanent Magnet Synchronous Motor[J]. Transactions of China Electrotechnical Society, 2016, 31(22): 45-56.

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https://dgjsxb.ces-transaction.com/EN/ OR https://dgjsxb.ces-transaction.com/EN/Y2016/V31/I22/45

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