Title :
A small size ultrasonic motor
Author :
Kawasaki, O. ; Nishikura, T. ; Sumihara, M. ; Ohtsuchi, T. ; Takeda, K. ; Nojima, T. ; Imada, K.
Author_Institution :
Device Process Technol. Res. Lab., Matsushita Electr. Ind. Co. Ltd., Osaka, Japan
Abstract :
A small size ultrasonic motor has been developed which exploits the traveling waves produced by bending vibration. The motor is composed of a vibrating disk stator and a disk rotor in physical contact with the stator. There are three circumferential waves in the stator. The outside diameter of the motor is 10 mm, and the height is 8 mm. The total weight is only 3.5 g. The prototype motor produced a starting torque of 25 gf-cm, a no-load rotational speed of 1200 r.p.m. and a maximum efficiency of about 20%
Keywords :
bending; rotors; small electric machines; stators; torque; ultrasonic motors; vibrations; 10 mm; 20 percent; 3.5 g; 8 mm; bending vibration; circumferential waves; disk rotor; maximum efficiency; no-load rotational speed; small size ultrasonic motor; starting torque; traveling waves; vibrating disk stator; Actuators; Bidirectional control; Bonding; Laboratories; Power generation; Prototypes; Rotors; Stators; Torque; Ultrasonic variables measurement;
Conference_Titel :
Systems, Man and Cybernetics, 1993. 'Systems Engineering in the Service of Humans', Conference Proceedings., International Conference on
Conference_Location :
Le Touquet
Print_ISBN :
0-7803-0911-1
DOI :
10.1109/ICSMC.1993.384782
