基于定子磁链轨迹跟踪的优化PWM高性能闭环控制

doi:10.3969/j.issn.1007-2861.2014.03.021

Abstract

Abstract: Lower harmonic distortion at low switching frequency requires optimal pulse patterns. But it cannot be directly used in high performance systems. A stator flux trajectory tracking control (FTTC) system is studied, and a pulse width modulation (PWM) correction method is proposed. Based on this method, dynamic modulation errors and high overcurrents as the operating conditions change are discussed. Furthermore, high performance closed-loop control of optimal PWM based on FTTC with a self-controlled machine model can be realized. Simulation results show that both fast dynamic response and low harmonics characteristic can be achieved at a low switching frequency of 200∽300 Hz. Its harmonic characteristic is more outstanding than that of model predictive direct control methods.

Key words: high performance closed-loop control, low switching frequency, optimal PWM, stator flux trajectory tracking

CLC Number:

TM 343

SONG Wen-xiang, JIANG Shu-hao, RUAN Zhi-yong, YANG Ying, RUAN Yi. High performance close-loop control of optimal PWM based on stator flux trajectory tracking[J]. Journal of Shanghai University（Natural Science Edition）, 2015, 21(1): 128-140.

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High performance close-loop control of optimal PWM based on stator flux trajectory tracking

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