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http://dx.doi.org/10.5302/J.ICROS.2008.14.10.991

An RMRAC Controller for Permanent Magnet Synchronous Motor Based On Modified Current Dynamics  

Jin, Hong-Zhe (부산대학교 전자전기통신공학부)
Lee, Jang-Myung (부산대학교 전자전기통신공학부)
Publication Information
Journal of Institute of Control, Robotics and Systems / v.14, no.10, 2008 , pp. 991-997 More about this Journal
Abstract
A new RMRAC scheme far the PMSM current regulation is proposed in a synchronous frame, which is completely free from the parameter's uncertainty. A current regulator of PMSM is the inner most loop of electromechanical driving systems and plays a foundation role in the control hierarchy. When the PMSM runs in high speed, the cross-coupling terms must be compensated precisely for large system BW. In the proposed RMRAC, the input signal is composed of a calculated voltage defined by MRAC law and an output of the disturbance compensator. The gains of feed forward and feedback controller are estimated by the proposed modified gradient method, where the system disturbances are assumed as filtered current regulation errors. After the compensation of the system disturbance from error information, the corresponding voltage is fed forward to control input to compensate for real disturbances. The proposed method robustly compensates the system disturbance and cross-coupling terms. It also shows a good realtime performance due to the simplicity of control structure. Through real experiments, the efficiency of the proposed method is verified.
Keywords
RMRAC; feed-forward compensation; statistical model; disturbance observer;
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