• Title, Summary, Keyword: Ultrasonic linear motor

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A Study on Standing Wave Type Ultrasonic Linear Motors (정재파형 초음파 리니어 모터에 관한 연구)

  • 권재화;이수성;강국진;노용래
    • The Journal of the Acoustical Society of Korea
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    • v.20 no.8
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    • pp.38-43
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    • 2001
  • We developed a new standing wave type ultrasonic linear motor that can be driven bi-directionally. The operation principle of the motor was derived in an analytical form and the detailed structure was designed by the finite element method. Based on the design, a motor sample and a driving circuit were fabricated, and validity of the structure was verified through experiments.

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Design and Trial Fabrication of Plate-Type Linear Ultrasonic Motor Using L1-B4 Vibration Mode (L1-B4 진동모드를 이용한 평판형 선형 초음파 모터의 설계 및 시제작)

  • 이종섭;정수현;임기조;임태빈;강성택;채홍인
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.11 no.10
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    • pp.861-865
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    • 1998
  • A plate-type linear ultrasonic motor using logitudinal and bending multi-vibration mode was designed and fabricated for the application to card-forwarding device. The stator consisted of PZ-PT-PMS piezoelectric ceramic plate and stainless steel. The performances of the motor were measured. As the experimental results, no-load speed of the motor was 0.6m/s when applied voltage was $80\textrm{V}_{rms}$ in resonance frequency. Starting torque was 1.4 mNm and maximum efficiency was 1.2%.

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Investigation of The Linear Ultrasonic Motor for Autofocus Lens Drive (렌즈의 자동초점 구동을 위한 리니어 초음파 모터에 관한 연구)

  • Lee, Han-Joo;Oh, Jin-Heon;Kwon, Jeong-Hoon;Lim, Kee-Joe
    • Proceedings of the KIEE Conference
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    • pp.1479-1480
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    • 2011
  • In this paper, a novel design ultrasonic linear motor is proposed. The proposed motor consists of a ring type stator and a mover. They have spirals on their inner and outer surface, respectively. Along the spiral, a mover is travelled by a travelling extensional vibration mode of a ring type stator. Hence, a linear up-and-down motion is generated. Through the experimental data, we can verify the applicability regarding the autofocus lens drive.

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Design and Fabrication of Novel Linear Ultrasonic Motor (선형 초음파 모터 설계 및 제작)

  • Lee, Dong-Kyun;Han, Deuk-Young;Choi, Ji-Won;Kim, Hyun-Jai;Yoon, Seok-Jin
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • pp.776-778
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    • 2003
  • In the paper, the novel linear ultrasonic motor for precision position control was designed and fabricated. It was composed of two piezoelectric actuators with longitudinal ultrasonic fluctuations and shaking beam. When two AC electric fields ($Usin{\omega}t$, $Ucos{\omega}t$) were applied in two piezoelectric actuators respectively, the middle part of shaking beam had an elliptical trajectory. According to experimental results, good symmetrical characteristic of two piezoelectric actuators were obtained.

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Design and Fabrication of Novel Linear Ultrasonic Motor (선형초음파 모터의 설계 및 제작)

  • 이동균;한득영;윤석진
    • Journal of the Korean Ceramic Society
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    • v.40 no.10
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    • pp.981-984
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    • 2003
  • A novel linear ultrasonic motor for precision position control was designed and fabricated. It was composed of two piezoelectric actuators with longitudinal ultrasonic fluctuations and shaking beam. When two AC electric fields (Usinwt, Ucoswt) were applied to piezoelectric actuators respectively, the middle part of shaking beam had an elliptical trajectory. According to experimental results, the generative force was proportional to pre-load force but the speed of slider was in inverse proportion. And the bar of shaking beam had a same trajectory with simulation result.

Design of Shaking Beam for Piezoelectric Linear Ultrasonic Motor

  • Yoon, Seok-Jin;Park, Ji-Won;Kim, Sang-Jong;Yu, Yeon-Tae;Kim, Hyun-Jai
    • Journal of the Korean Ceramic Society
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    • v.40 no.11
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    • pp.1062-1066
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    • 2003
  • Design of a piezoelectric actuator for the ultrasonic motor must ensure that contact point has elliptic trajectory of movement. The new idea of an elliptic trajectory formation of the piezoelectric actuator is investigated in the paper. Shaking beam for the piezoelectric linear ultrasonic motor was introduced to realize this new idea. The principle is based on the excitation of longitudinal and flexural vibrations of the actuator by using two sources of longitudinal mechanical vibrations shifted by $\pi$/2. Mode-frequency and harmonic response analyses of the actuator based on FEM have been carried out. The moving trajectory of the contact point has been defined. Finally, The experimental research of shaking beam has been confirmed an opportunity of the elliptic trajectory reception with the help of one stable mode of the vibrations.