发明授权
US09407173B2 Piezo actuator having an electrode structure for a torsional vibration mode, and rotation-type ultrasonic motor including same
有权
具有用于扭转振动模式的电极结构的压电致动器和包括其的旋转型超声波电动机
- 专利标题： Piezo actuator having an electrode structure for a torsional vibration mode, and rotation-type ultrasonic motor including same
- 专利标题（中）： 具有用于扭转振动模式的电极结构的压电致动器和包括其的旋转型超声波电动机
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申请号： US13982151申请日： 2011-06-23
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公开(公告)号： US09407173B2公开(公告)日： 2016-08-02
- 发明人: Man-Sun Yun
- 申请人： Man-Sun Yun
- 代理机构： Hauptman Ham, LLP
- 优先权： KR10-2011-0009774 20110131
- 国际申请： PCT/KR2011/004591 WO 20110623
- 国际公布： WO2012/105734 WO 20120809
- 主分类号： H01L41/47
- IPC分类号： H01L41/47 ; H02N2/00 ; H01L41/047 ; B06B1/06 ; H02N2/16
摘要：
The present invention relates to a piezo actuator having an electrode structure for a torsional vibration mode, and to a rotation-type ultrasonic motor containing the same. In the piezo actuator having the electrode structure, electrodes may have different lengths from the center point of the piezo actuator in order to form an electrode structure having a pinwheel shape for enabling a torsional vibration mode. Thus, since the electrodes of the piezo actuator for generating torsional vibrations has a simple pinwheel wing structure, a rotor coupled along a groove formed in the side surface of the piezo actuator may be rotated using the torsional directional vibrations due to the electrode structure.
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