Affiliations: [a] Brain Korea 21 Plus, Creative Research Engineer Development, Department of Electrical Engineering, Seoul National University, Shinlim-Dong, Kwanak-Gu, Seoul, Korea | [b] School of Electronic and Electrical Engineering,
Sungkyunkwan University, Suwon, Kyeonggi-Do, Korea | [c] School of Electrical Engineering, Dong Eui University, Jin-Gu, Pusan, Korea
Correspondence:
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Corresponding author:Jong-Suk Ro, Brain Korea 21 Plus, Creative Research Engineer Development,
Department of Electrical Engineering, Seoul National University, San 56-1, Shinlim-Dong, Kwanak-Gu, Seoul, 151-742, Korea. Tel.: +82 2 880 7262; Fax: +82 2 878 1452; E-mail: jongsukro@naver.com
Abstract: The important research area associated with the Ultra-Sonic Motor
(USM) is the contact problem between the stator and the rotor. Because the USM
operates by the friction force between the rotor and the stator, the contact
problem of the USM have to be taken into account to analyze the motor
performance accurately. Consequently, various types of the analysis methods
have been proposed based on a contact model which describes the complex
nonlinear contact condition of the USM. In this paper, diverse types of contact
analysis methods for a Travelling Wave Ultra-Sonic Motor (TWUSM) are clearly
condensed and precisely examined. The governing equations for the analysis of
the TWUSM performance are derived through a precise investigation of the
relationship between the contact condition and the motor performance in this
paper. Furthermore, the motor performance is analyzed using contact models and
the calculated data are compared with the experimental results.
