ROTOR-FLOATING TYPE ULTRASONIC MOTOR

Japanese Patent JP3575569

B2

PROBLEM TO BE SOLVED: To achieve a long life and to make it possible to perform high-speed operation by providing first and second ultrasonic exciting means separately in the circumferential direction of a stator, and driving the first and second ultrasonic driving means with the phase difference being provided.
SOLUTION: First and second ultrasonic vibration generating parts 5 and 6, which are constituted by the same way, respectively, are connected to the outer surface part of a stator 1. The first and second ultrasonic vibration generating parts 5 and 6 are arranged separately at an angle of 45° in the circumferential direction of the stator 1. Then, high-frequency power supplies 9 and 10 are connected to both vibrators 5a and 6a provided at both ultrasonic vibration generating ports 5 and 6. The frequencies of the respective high-frequency power supplies 9 and 10 are set so as to have the time-phase difference of 90° to each other. Together with this setting of the separation angle of 45° for both ultrasonic vibration generating parts 5 and 6, the six-dimensional deflection vibrating mode, which is indicated by G6 and advances in the circumferential direction, is generated in the stator. Thus, the long life can be achieved, and the high-seed operation can be performed.

JP2002359896	ULTRASONIC WAVE TRANSDUCER
WO/2018/088340	VIBRATION DEVICE
JPS599000	[Title of the Invention] Ultrasonic transducer

Kentaro Nakamura
Yoshiki Hashimoto

JP6369296A

October 13, 2004

February 26, 1996

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Kentaro Nakamura
Kaijo Co., Ltd.

B06B1/06; H02N2/00; (IPC1-7): H02N2/00; B06B1/06

JP2083695U
JP63125100A
JP3067817A
JP7024415A
JP7137824A
JP5038554B2

山崎東吾、中村健太郎、上羽貞行,ロータ浮上式非接触駆動超音波モータの試作,日本音響学会 平成7年秋季研究発表会 講演論文集 II,日本,社団法人 日本音響学会,1995年 9月,P1087-1088

Masaharu Hagiri

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