Piezoelectric ultrasonic motors using bulk PZT and utilizing two orthogonal bending modes of a hollow cylinder (part 2)

Serra Cagatay, Kenji Uchino, Burhanettin Koc

Research output: Contribution to journalArticle

Abstract

Our main objective was to design, fabricate and characterize piezoelectric ultrasonic motors for micromechatronic devices. Three different prototypes were fabricated. The stator part of the motors was composed of a composite structure; metal and piezoelectric ceramic plates. Owing to the partially square/partially circular outside surface, the stator had two degenerated bending modes that were orthogonal to each other. First stator was 10 mm in length. The outer and inner diameters were 2.4 mm and 1.6 mm, respectively. Dimensions of the second stator had been reduced by 50%. In the final design, length of the stator had reached to 4 mm and the rotor part of the motor had been changed from a solid rod to a spring. In addition, an optimization process was conducted on improving the displacement range of the stator of the piezoelectric micro-motor. When both modes were excited at a single resonance frequency, the resultant wobbling motion will provide higher displacement values, which in turn will provide higher torque.

Original languageEnglish (US)
Pages (from-to)405-412
Number of pages8
JournalCeramic Transactions
Volume167
StatePublished - 2005

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Stators
Ultrasonics
Piezoelectric ceramics
Cermets
Composite structures
Torque
Rotors

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites

Cite this

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abstract = "Our main objective was to design, fabricate and characterize piezoelectric ultrasonic motors for micromechatronic devices. Three different prototypes were fabricated. The stator part of the motors was composed of a composite structure; metal and piezoelectric ceramic plates. Owing to the partially square/partially circular outside surface, the stator had two degenerated bending modes that were orthogonal to each other. First stator was 10 mm in length. The outer and inner diameters were 2.4 mm and 1.6 mm, respectively. Dimensions of the second stator had been reduced by 50{\%}. In the final design, length of the stator had reached to 4 mm and the rotor part of the motor had been changed from a solid rod to a spring. In addition, an optimization process was conducted on improving the displacement range of the stator of the piezoelectric micro-motor. When both modes were excited at a single resonance frequency, the resultant wobbling motion will provide higher displacement values, which in turn will provide higher torque.",
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Piezoelectric ultrasonic motors using bulk PZT and utilizing two orthogonal bending modes of a hollow cylinder (part 2). / Cagatay, Serra; Uchino, Kenji; Koc, Burhanettin.

In: Ceramic Transactions, Vol. 167, 2005, p. 405-412.

Research output: Contribution to journalArticle

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