Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference (한국전기전자재료학회:학술대회논문집)
- 2005.11a
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- Pages.232-233
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- 2005
The design and characteristics of disk-type ultrasonic motor
디스크타입 초음파모터의 제작 및 특성평가
- Yun, Yong-Jin (HChungbuk National Univ) ;
- Park, Sung-Hee (HChungbuk National Univ) ;
- Kang, Sung-Hwa (Chung Cheng, College) ;
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Lim, Ki-Joe
(HChungbuk National Univ)
- Published : 2005.11.10
Abstract
In this paper, disk-type ultrasonic motor using a combination of radial and bending vibration modes is newly designed and fabricated. The characteristics of the test motor are also measured. By means of travelingelastic wave induced at the surface of circumference of the elastic disk, a steel bar in contact with the surface of circumference of elastic disk bonded onto the piezoelectric ceramic disks is driven inboth directions by changing the sine and cosine voltage inputs. The stator of the motor is composed of two sheets of piezoelectric ceramic disk to bond onto both surfaces of a elastic disk, respectively. As the results, the diameter of elastic body is increased, the resonant frequency is decreased. The resonant frequency of the stator is about 92 kHz, which is composed with piezoelectric ceramic disks of 28 mm in diameter and 2 mm in thickness, and an elastic body of 32 mm in diameter and 2 mm in thickness. A driving voltage of 20 Vpp produces 200 rpm with a torque of 1Nm and an efficiency of about 10 %.