基于双3L-NPC开绕组电机反电动势谐波电压下中点平衡控制

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Abstract The motor converter neutral point balance control strategy of dual 3L-NPC open-end winding motor is proposed with back-EMF harmonic voltage.Firstly,the mathematic model of open-end wind PMSG is established.The value and phase of back-EMF harmonic is observed including PR controller and the zero sequence current is suppressed by adding the same value and phase zero voltage to the modulation waves.The positive and negative relationship of the modulation waves are changed after the compensation zero sequence voltage injection.By the discuss of the dual modulation waves working scope,the neutral point balance of common DC link based on zero sequence back-EMF is realized.Finally the neutral point control ability under different modulation,power factor and zero sequence back-EMF is analyzed.Simulation and experimental results verify the correctness of this theory.

Key words： Open-end winding motor back-EMF harmonic zero sequence current neutral point balance control

Received: 17 August 2016 Published: 23 March 2017

PACS:

TM464

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	Yin Jingyuan
	Yao Xiuyuan
	Wu Lixin

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Yin Jingyuan,Yao Xiuyuan,Wu Lixin. Neutral Point Balance Control of Dual 3L-NPC Open-End Winding Motor Based on Back-EMF Harmonic Voltage[J]. Transactions of China Electrotechnical Society, 2016, 31(增刊2): 183-193.

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https://dgjsxb.ces-transaction.com/EN/ OR https://dgjsxb.ces-transaction.com/EN/Y2016/V31/I增刊2/183

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