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.
鲍旭聪, 王晓琳, 顾聪, 石滕瑞. 超高速永磁电机驱动系统电流环稳定性分析与改进设计[J]. 电工技术学报, 2022, 37(10): 2469-2480.
Bao Xucong, Wang Xiaolin, Gu Cong, Shi Tengrui. Stability Analysis and Improvement Design of Current Loop of Ultra-High-Speed Permanent Magnet Motor Drive System. Transactions of China Electrotechnical Society, 2022, 37(10): 2469-2480.
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