Proposal of Current Control Method of High-Speed AC Motor System

In this paper, a current control method for a highspeed AC motor system is proposed. In high-speed driving operation, the current controller tends to lose stability because of the dead time caused by computational delay and electromagnetic coupling included in the AC motor model. The main purpose of the proposed method is reduction of the dead time on the current controller. The proposed method is based on model predictive control and optimization of the start timing. The effectiveness of the proposed method is confirmed by simulation results. (c) 2011 Wiley Periodicals, Inc. Electr Eng Jpn, 176(1): 37-45, 2011; Published online in Wiley Online Library (wileyonlinelibrary.com). DOI 10.1002/eej.21083