误差自校正混合脉宽调制策略

doi:10.19595/j.cnki.1000-6753.tces.210753

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Abstract The phase current reconstruction of a single current sensor based on the traditional space vector pulse width modulation method has an unobservable area and cannot realize the zero-point drift correction. Therefore, an error self-correcting mixed pulse width modulation method is proposed. Two complementary effective voltage space vectors are inserted in each carrier cycle of the unobservable area to replace the zero-voltage vector, which provides a reliable sampling window for the current sensor and eliminates the current unobservable area. At the same time, through the dynamic double sampling of the complementary effective voltage vector, the self-detection and self-correction of the current zero drift are realized. Under the experimental conditions, the proposed method recon- struction phase current error is less than 3.57%, and the total harmonic distortion of the phase current is less than 4.02%, which can provide a reliable reconstruction phase current for the control system.

Key words： DC bus phase current reconstruction error self-calibration space vector pulse width modulation error self-correcting mixed pulse width modulation

Received: 24 May 2021

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TM341

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	Shen Yongpeng
	Wang Qiancheng
	Wang Yanfeng
	Yuan Xiaofang
	Li Hailin

Cite this article:

Shen Yongpeng,Wang Qiancheng,Wang Yanfeng等. Error Self-Correction Mixed Pulse Width Modulation Strategy[J]. Transactions of China Electrotechnical Society, 2022, 37(14): 3643-3653.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.210753 OR https://dgjsxb.ces-transaction.com/EN/Y2022/V37/I14/3643

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