Novel method for driving the ultrasonic motor

Hyeoung Woo Kim, Shuxiang Dong, Pitak Laoratanakul, Kenji Uchino, Tae Gone Park

Research output: Contribution to journalArticlepeer-review

32 Scopus citations


This paper reports a novel driving method for an annular plate-type ultrasonic motor. Instead of the direct current/alternating current (DC/AC) converter type driver using conventional electromagnetic transformer, a compact disc-type piezoelectric transformer is used to obtain high voltage output for driving the ultrasonic motor. The piezoelectric transformer is operated in the radial vibration mode at resonance frequency close to the resonance frequency of the ultrasonic motor. Later, it was found that the piezoelectric transformer could drive the ultrasonic motor, even if their resonance frequencies are not exactly the same by incorporating the matching network in the circuit. The maximum speed of the ultrasonic motor obtained by using this driving method is over 300 rpm. It is believed that the results of this study will have impact on the integration and miniaturization of the ultrasonic motor and its driving circuit.

Original languageEnglish (US)
Pages (from-to)1356-1362
Number of pages7
JournalIEEE transactions on ultrasonics, ferroelectrics, and frequency control
Issue number10
StatePublished - Oct 2002

All Science Journal Classification (ASJC) codes

  • Instrumentation
  • Acoustics and Ultrasonics
  • Electrical and Electronic Engineering


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