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Characteristics of the Ultrasonic Linear Motor Using Radial and Nonaxisymmetric Vibration Modes of an Annular Plate

1995; Institute of Physics; Volume: 34; Issue: 9S Linguagem: Inglês

10.1143/jjap.34.5288

1347-4065

Takehiro Takano, Yoshirô Tomikawa,

Aeroelasticity and Vibration Control

This paper deals with an ultrasonic linear motor using nonaxisymmetric ((1, 1)) vibration and radial ( R , 1) vibration modes of a piezoelectric ceramic annular plate. A new method of making these modes degenerate is proposed. By applying this method to a vibrator, the neutral axis of vibration for ((1, 1))-mode is fixed on the prescribed position, and the difference between the two resonance frequencies is adjusted to the optimum state for a stator vibrator. The construction and some operational characteristics of the linear motor are presented. The maximum efficiency of the prototype motor was about 48%.