超高速永磁电机驱动系统电流环稳定性分析与改进设计

doi:10.19595/j.cnki.1000-6753.tces.201421

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Abstract The delay of the drive system of ultra-high speed permanent magnet motor will seriously affect the stability of the system under the operating condition of ultra-high fundamental frequency. In this paper, the dynamic model of the current loop is accurately reconstructed, and the influence of cross-coupling and delay effect on the system stability is systematically analyzed under high fundamental frequency operating conditions. Accordingly, a damp-integral current loop regulation mechanism is proposed for ultra-high-speed motors based on double sampling current prediction. By compensating the damping ratio of the system, the additional cross-coupling effect is eliminated. In addition, a two-sampling current prediction algorithm with piecewise execution is designed, which can realize the prediction of the next beat feedback current without relying on any parameters and effectively compensate the system stability margin. The above two measures provide a strong guarantee for the global stability of ultra-high fundamental frequency system. Finally, a 550 000r/min/110W ultra-high-speed experimental prototype platform was used to fully simulate and analyze the proposed improved current loop regulation mechanism, which verified the effectiveness and superiority of the proposed scheme.

Key words： Ultra-high-speed motor stability control delay sample delay damping-ratio stability margin

Received: 26 October 2020

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TM351

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	Articles by authors
	Bao Xucong
	Wang Xiaolin
	Gu Cong
	Shi Tengrui

Cite this article:

Bao Xucong,Wang Xiaolin,Gu Cong等. Stability Analysis and Improvement Design of Current Loop of Ultra-High-Speed Permanent Magnet Motor Drive System[J]. Transactions of China Electrotechnical Society, 2022, 37(10): 2469-2480.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.201421 OR https://dgjsxb.ces-transaction.com/EN/Y2022/V37/I10/2469

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