A piezoelectric micromotor with a stator of φ = 1.6mm and l = 4mm using bulk PZT

Serra Cagatay, Burhanettin Koc, Paul Moses, Kenji Uchino

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

The smallest discrete piezoelectric ultrasonic motor using bulk ceramics was developed. We are proposing basically a two-part motor: stator and rotor. The stator of the present motor consists of a hollow metal brass tube with outer diameter of 1.6mm, inner diameter of 0.8mm and length of only 4mm with 2 PZT plates bonded onto it. Owing to the asymmetrical stator surface, two degenerated orthogonal bending modes were slightly split, resulting in a wobbling motion. Thus, the motor can be driven by a single driving source. The rotor is a spring, which is basically different from previous designs, pressed at both ends to the stator by a pair of ferrules. Consequently, the length of the whole motor assembly was reduced significantly; a final motor length of only 5 mm was obtained. The working frequency under zero load was approximately 227-233 kHz. Although the size is small, relatively high power was obtained under an optimized load condition: torque of 0.06 mNm, maximum power of 3.2 mW with a speed of 118 rad/s, and maximum efficiency of 11% under 48 Vrms at 221 kHz.

Original languageEnglish (US)
Pages (from-to)1429-1433
Number of pages5
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume43
Issue number4 A
DOIs
StatePublished - Jan 1 2004

Fingerprint

micromotors
Micromotors
stators
Stators
rotors
Rotors (windings)
brasses
Brass
torque
hollow
Loads (forces)
Torque
Rotors
assembly
ultrasonics
Ultrasonics
ceramics
tubes
Metals
metals

All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Physics and Astronomy(all)

Cite this

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title = "A piezoelectric micromotor with a stator of φ = 1.6mm and l = 4mm using bulk PZT",
abstract = "The smallest discrete piezoelectric ultrasonic motor using bulk ceramics was developed. We are proposing basically a two-part motor: stator and rotor. The stator of the present motor consists of a hollow metal brass tube with outer diameter of 1.6mm, inner diameter of 0.8mm and length of only 4mm with 2 PZT plates bonded onto it. Owing to the asymmetrical stator surface, two degenerated orthogonal bending modes were slightly split, resulting in a wobbling motion. Thus, the motor can be driven by a single driving source. The rotor is a spring, which is basically different from previous designs, pressed at both ends to the stator by a pair of ferrules. Consequently, the length of the whole motor assembly was reduced significantly; a final motor length of only 5 mm was obtained. The working frequency under zero load was approximately 227-233 kHz. Although the size is small, relatively high power was obtained under an optimized load condition: torque of 0.06 mNm, maximum power of 3.2 mW with a speed of 118 rad/s, and maximum efficiency of 11{\%} under 48 Vrms at 221 kHz.",
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A piezoelectric micromotor with a stator of φ = 1.6mm and l = 4mm using bulk PZT. / Cagatay, Serra; Koc, Burhanettin; Moses, Paul; Uchino, Kenji.

In: Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers, Vol. 43, No. 4 A, 01.01.2004, p. 1429-1433.

Research output: Contribution to journalArticle

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