LLCC resonant inverter for piezoelectric ultrasonic motor drive

Author

Lin, F.-J. ; Duan, R.Y. ; Wai, R.-J. ; Hong, C.-M.

Author_Institution

Dept. of Electr. Eng., Chung Yuan Christian Univ., Chung Li, Taiwan

Volume

146

Issue

5

fYear

1999

fDate

9/1/1999 12:00:00 AM

Firstpage

479

Lastpage

487

Abstract

An LLCC resonant circuit is implemented in this study to build a high-frequency two-phase voltage source inverter for the piezoelectric ultrasonic motor (USM). A single-phase equivalent model of the USM is described. The operating principle and detailed analysis of the proposed driving circuit, in which the inherent parasitic capacitances formed by the polarised piezoelectric ceramic of the USM are parts of the two LLCC resonant circuits, are introduced. Since the dynamic characteristic of the USM is greatly influenced by the variation in the Q of the RLC resonant tanks, the drive will be operated about a geometric frequency where the amplitude and phase of the two-phase output voltages of the resonant inverter would not be influenced by the variation in Q. Detailed experimental results are provided to demonstrate the effectiveness of the proposed driving circuit

Keywords

DC-AC power convertors; invertors; motor drives; power supplies to apparatus; resonant power convertors; ultrasonic motors; HF two-phase VSI; LLCC resonant inverter; dynamic characteristic; geometric frequency; operating principle; parasitic capacitances; piezoelectric ultrasonic motor drive; polarised piezoelectric ceramic; single-phase equivalent model; voltage source inverter;

fLanguage

English

Journal_Title

Electric Power Applications, IEE Proceedings -

Publisher

iet

ISSN

1350-2352

Type

jour

DOI

10.1049/ip-epa:19990418

Filename

810249