Abstract
This paper presents the method of determining and characterizing of a piezoelectric stator profile that applying in a piezoceramic ultrasonic motor with the consideration of heat generated. The piezoceramic ultrasonic motor is driven by the vibration of the piezoelectric element in order to ignite a motion. The harmonic and transient analysis of finite element method are used to predict the optimise operation frequency of the motor travelling wave. Then, a thermal analysis is conducted in order to analyse the heat distribution on the stator. The stator profile displacements with the variable temperature; 300, 360 and 450 K are analysed. The piezoceramic ultrasonic motor shows different longitudinal deflection with the increment of the temperature. Travelling wave optimization was found to be strongly dependent on the heat that generated by the piezoceramic.
Highlights
Motor is a device that driven by electromagnetic force which involve conversion of electrical energy to mechanical energy [1] while ultrasonic motor is a device that driven by piezoelectric vibrations to convert electrical energy to mechanical energy [2]
The stator surface is coupled with piezoceramic and AC voltages are supplied to it through electrodes
The travelling-wave piezoelectric ultrasonic motor (TWUSM) has recently been attracting considerable attention due to the high torque compare to the volume ratio, long life span and high stability in use [4]
Summary
Motor is a device that driven by electromagnetic force which involve conversion of electrical energy to mechanical energy [1] while ultrasonic motor is a device that driven by piezoelectric vibrations to convert electrical energy to mechanical energy [2]. Ultrasonic motor consists of piezoceramic, electrode, stator and rotor as its components. The stator surface is coupled with piezoceramic and AC voltages are supplied to it through electrodes. The voltages displace the stator in an elliptical trajectory. In response to the stator displacement, the rotor rotates simultaneously [3]. The travelling-wave piezoelectric ultrasonic motor (TWUSM) has recently been attracting considerable attention due to the high torque compare to the volume ratio, long life span and high stability in use [4]
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