| Title |
The Vibration Characteristic Improvement by Mode Variation of Ring Type Ultrasonic Motor |
| Authors |
Shin-Yong Yoon ; Soo-Seok Kim |
| Keywords |
Ring type ultrasonic motor ; Variation mode ; Piezoelectric ceramic ; Elastic body ; Resonance frequency |
| Abstract |
This paper suggested the vibration characteristic improvement by variation mode of ring type ultrasonic motor. Design for the piezoelectric ceramic and elastic body of stator were calculated by the finite element method(FEM) that consider the resonance frequency, vibration mode and coupling efficiency etc. Through the result of vibration analysis from 6 order mode to 8 mode, the 7 order mode was gained very an excellent results that it was the coupling efficient, minimum power loss and bending vibration value. Here over 7 order mode, was acquired that an output current for input voltage was very a large increased results. The result of vibration calculation, from thickness 0.5[㎜] to 2[㎜], know the fact that the vibration displacement at 0.5[㎜] is an high value too. From such analysis result, this paper was manufactured the ultrasonic motor of outer diameter 50[㎜], inter 22[㎜] having the about 43.86[kHz] resonance frequency. We have gated that a simulation result is 42.2[kHz] and an experiment result is 43.86[kHz]. Then, a propriety of this paper was established the result almost similar to though comparison, investigation of simulation and experiment result. |