A controller for high-power electrostatic motor is described in this paper. The controller includes stereo audio amplifiers, small transformers, and a signal generator. The signal generator generates controlled driving signals of dual-frequency driving methods so that a motor can generate commanded thrust force. By using frequencies of several kHz for driving signals and by using resonance between an electrostatic motor and transformers, it became possible to use commercially-available audio amplifiers as voltage sources and to use small transformers. In this paper, design of the signal generator and the transformers are discussed. Also, experimental results using linear type motor is shown.
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