Author： Chung S. W. Chau K. T.
Publisher： Taylor & Francis Ltd
ISSN： 1532-5016
Source： Electric Power Components and Systems, Vol.35, Iss.4, 2007-04, pp. : 411-428
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Abstract
This article presents a new approach for speed control of traveling-wave ultrasonic motors. The key is to provide a practical model to allow for controller design and simulation using standard simulation software. The model offers a simple relationship between the control inputs and the output torque. Operating frequency and voltage amplitudes are used as control inputs through direct pulse-width-modulation. A speed control system using a low cost DSP microcontroller has been implemented. A PI controller has been designed through simulation to compare with the experiments. Consistent results have been obtained, demonstrating the feasibility and effectiveness of this approach.
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