Improvement of driving efficiency of ultrasonic motor by improvement of vibration configuration

Shogo Kumamoto; Kyohei Hosoda; Kenjiro Takemura

doi:10.1109/ULTSYM.2014.0530

Improvement of driving efficiency of ultrasonic motor by improvement of vibration configuration

Shogo Kumamoto, Kyohei Hosoda, Kenjiro Takemura

Department of Mechanical Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

3 Citations (Scopus)

Abstract

An ultrasonic motor is generally composed of a vibrator and a rotor, and is driven by the frictional force between the vibrator/rotor. Since the contact points on the vibrator draw elliptic trajectory, relative speed of the point against the rotor varies even when the rotor rotates with a constant speed. This may cause abrasion between the vibrator/rotor and decrease in driving efficiency. This research proposes a novel method to reduce the relative speed to improve the driving efficiency of ultrasonic motors by superimposing harmonic vibrations with driving vibration. Results of numerical calculation show that driving efficiency may be improved by 27% by the proposed method.

Original language	English
Title of host publication	IEEE International Ultrasonics Symposium, IUS
Publisher	IEEE Computer Society
Pages	2129-2132
Number of pages	4
ISBN (Electronic)	9781479970490
DOIs	https://doi.org/10.1109/ULTSYM.2014.0530
Publication status	Published - 2014 Oct 20
Event	2014 IEEE International Ultrasonics Symposium, IUS 2014 - Chicago, United States Duration: 2014 Sept 3 → 2014 Sept 6

Publication series

Name	IEEE International Ultrasonics Symposium, IUS
ISSN (Print)	1948-5719
ISSN (Electronic)	1948-5727

Other

Other	2014 IEEE International Ultrasonics Symposium, IUS 2014
Country/Territory	United States
City	Chicago
Period	14/9/3 → 14/9/6

Keywords

Efficiency
Superimposing harmonic vibration
Ultrasonic Motor

ASJC Scopus subject areas

Acoustics and Ultrasonics

Access to Document

10.1109/ULTSYM.2014.0530

Cite this

Improvement of driving efficiency of ultrasonic motor by improvement of vibration configuration. / Kumamoto, Shogo; Hosoda, Kyohei; Takemura, Kenjiro.
IEEE International Ultrasonics Symposium, IUS. IEEE Computer Society, 2014. p. 2129-2132 6932039 (IEEE International Ultrasonics Symposium, IUS).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Kumamoto, S, Hosoda, K & Takemura, K 2014, Improvement of driving efficiency of ultrasonic motor by improvement of vibration configuration. in IEEE International Ultrasonics Symposium, IUS., 6932039, IEEE International Ultrasonics Symposium, IUS, IEEE Computer Society, pp. 2129-2132, 2014 IEEE International Ultrasonics Symposium, IUS 2014, Chicago, United States, 14/9/3. https://doi.org/10.1109/ULTSYM.2014.0530

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abstract = "An ultrasonic motor is generally composed of a vibrator and a rotor, and is driven by the frictional force between the vibrator/rotor. Since the contact points on the vibrator draw elliptic trajectory, relative speed of the point against the rotor varies even when the rotor rotates with a constant speed. This may cause abrasion between the vibrator/rotor and decrease in driving efficiency. This research proposes a novel method to reduce the relative speed to improve the driving efficiency of ultrasonic motors by superimposing harmonic vibrations with driving vibration. Results of numerical calculation show that driving efficiency may be improved by 27% by the proposed method.",

keywords = "Efficiency, Superimposing harmonic vibration, Ultrasonic Motor",

author = "Shogo Kumamoto and Kyohei Hosoda and Kenjiro Takemura",

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AU - Hosoda, Kyohei

AU - Takemura, Kenjiro

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N2 - An ultrasonic motor is generally composed of a vibrator and a rotor, and is driven by the frictional force between the vibrator/rotor. Since the contact points on the vibrator draw elliptic trajectory, relative speed of the point against the rotor varies even when the rotor rotates with a constant speed. This may cause abrasion between the vibrator/rotor and decrease in driving efficiency. This research proposes a novel method to reduce the relative speed to improve the driving efficiency of ultrasonic motors by superimposing harmonic vibrations with driving vibration. Results of numerical calculation show that driving efficiency may be improved by 27% by the proposed method.

AB - An ultrasonic motor is generally composed of a vibrator and a rotor, and is driven by the frictional force between the vibrator/rotor. Since the contact points on the vibrator draw elliptic trajectory, relative speed of the point against the rotor varies even when the rotor rotates with a constant speed. This may cause abrasion between the vibrator/rotor and decrease in driving efficiency. This research proposes a novel method to reduce the relative speed to improve the driving efficiency of ultrasonic motors by superimposing harmonic vibrations with driving vibration. Results of numerical calculation show that driving efficiency may be improved by 27% by the proposed method.

KW - Efficiency

KW - Superimposing harmonic vibration

KW - Ultrasonic Motor

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Improvement of driving efficiency of ultrasonic motor by improvement of vibration configuration

Abstract

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Keywords

ASJC Scopus subject areas

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