Fabrication and Operation Characteristics of Linear Ultrasonic Motor

L$_1$-B$_4$모드 선형 초음파 전동기의 제작과 운전 특성

  • 이명훈 (서울대 농·산업교육과) ;
  • 김진수 (한국교원대 기술교육과 교수·공박 김진수)
  • Published : 2001.06.01


In this paper, a linear ultrasonic motor using piezoelectric ceramics was fabricated, and its operation characteristics were investigated. A linear ultrasonic motor using L$_1$-B$_4$model was composed of a stator and a rotor, and a stator was composed of piezoelectric ceramics and a elastic body. When applied frequency and voltage were 58.4kHz and 56V respectively, the feeding speed of the motor was 19.8 cm/s. A linear ultrasonic motor could be moved in left and right directions by the phase difference. Feeding speed and feeding force of a linear ultrasonic motor could be controlled by applied voltage. A linear ultrasonic motor had a droping torque-speed characteristic. The maximum efficiency of linear ultrasonic motor was 2.14%. Therefore, this linear ultrasonic motor can be expected to be used for a card-forwarding device, such as a card reader device and so on.


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