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퍼지제어기를 이용한 초음파 모터의 온도특성에 관한 연구-위상차 제어
서기열(Ki-Yeol Seo),차인수(In-Su Cha),윤형상(Hyung-Sang Yoon),유권종(Gown-Jong Yu) 전력전자학회 1996 전력전자학술대회 논문집 Vol.1996 No.-
This paper describes the bending traveling-wave type ultrasonic motor which generated the traveling wave by combining two standing waves with phase difference time and space. In +20℃~30℃, the USM motor operation character has represented normal condition. But the other temperature, (that is say, when long time operating condition) USM operation characteristic has abnormal condition, that is driving frequency, drive current and r.p.m is down. The recent USM has controller without temperature compensation, This study aimed at fuzzy controller which must follow the phase angle difference 90' at operation temperature and then r.p.m and torque increase.