Title :
An ultrasonic motor drive using a current-source parallel-resonant inverter with energy feedback
Author :
Lin, Faa-Jeng ; Duan, Rou-Yong ; Yu, Jyh-Chyang
Author_Institution :
Dept. of Electr. Eng., Chung Yuan Christian Univ., Chung Li, Taiwan
fDate :
1/1/1999 12:00:00 AM
Abstract :
An ultrasonic motor (USM) drive using a two-phase current-source parallel-resonant inverter is proposed in this study. A single-phase equivalent model of the USM is first described. Then, a detailed theory for the newly designed driving circuit for the USM, in which the inherent parasitic capacitances formed by the polarized piezoelectric ceramic of the USM are parts of the two parallel-resonant tanks, is introduced. Since the dynamic characteristics of the USM are greatly influenced by the variation in the quality factors of the parallel-resonant tanks, two transformers are added to feed the stored energy in the resonant tanks back to the DC source to reduce the quality factors. Detailed experimental results are provided to demonstrate the effectiveness of the proposed driving circuit
Keywords :
AC motor drives; Q-factor; invertors; machine theory; resonant power convertors; ultrasonic motors; current-source parallel-resonant inverter; driving circuit; energy feedback; inherent parasitic capacitances; polarized piezoelectric ceramic; quality factors; single-phase equivalent model; transformers; two-phase inverter; ultrasonic motor drive; Ceramics; Circuits; Feeds; Inverters; Motor drives; Parasitic capacitance; Piezoelectric polarization; Q factor; Resonance; Transformers;
Journal_Title :
Power Electronics, IEEE Transactions on
