Butterfly-shaped ultra slim piezoelectric ultrasonic linear motor

Won Hee Lee, Chong Yun Kang, Dong Soo Paik, Byeong Kwon Ju, Seok Jin Yoon

Research output: Contribution to journalArticlepeer-review

45 Citations (Scopus)


A new piezoelectric ultrasonic linear motor, shaped 'Butterfly' wings, has been developed for use in thin electronic products, such as cellular phones and PDAs. The butterfly piezoelectric transducer with a volume of 9 mm × 8 mm × 1 mm is composed of an elastic plate which includes a tip for energy transfer, two protrusions, and two piezoelectric ceramics. The ultra slim butterfly motor with a thickness of ∼1 mm could be achieved by positioning the layered piezoelectric transducer and a linear guide in parallel. The manufactured motor based on FEM analysis was successfully driven at the resonance frequency range that combines the longitudinal and transverse vibration modes. The maximum velocity of 88 mm/s was achieved at a driving frequency close to the pure vibration modes such as the longitudinal or transverse modes. In opposite, the maximum thrust force of 162 g was obtained at a middle frequency between two vibration modes.

Original languageEnglish
Pages (from-to)127-130
Number of pages4
JournalSensors and Actuators, A: Physical
Issue number1
Publication statusPublished - 2011 Jul


  • Elliptical motion
  • Longitudinal and transverse modes
  • Piezoelectric ceramics
  • Ultrasonic linear motor

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Instrumentation
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Electrical and Electronic Engineering


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