发明名称 |
Piezoelectric motor and method of exciting an ultrasonic traveling wave to drive the motor |
摘要 |
A rotary ultrasonic piezoelectric motor is provided and a method of exciting a flexure traveling wave to drive the motor. The motor includes a stator having a piezoelectric ceramic disc polarized in the radial direction and bounded by a top electrode and a segmented bottom electrode. The motor also includes a power source for applying two pairs of alternating voltages to the bottom electrode segments to excite a shear-shear mode vibration in the stator, resulting in a shear-shear mode flexure traveling wave in the stator. The motor further includes a rotor operatively connected to the stator, and the stator is driven to rotate through a frictional force between the rotor and the stator due to the traveling wave deformation of the stator. A linear ultrasonic piezoelectric motor and method of exciting a flexure traveling wave to linearly drive the motor is provided. The motor includes a stator having a rectangular piezoelectric ceramic plate that is polarized in the longitudinal direction. The motor also includes a power source for applying two pairs of alternating voltages to the bottom electrode segments to excite a shear-shear mode vibration in the stator, resulting in a shear-shear mode flexure traveling wave in the stator. The motor further includes a slider operatively connected to the stator, and the stator is driven to move linearly through a frictional force between the slider and the stator due to the traveling wave deformation of the stator.
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申请公布号 |
US7307372(B2) |
申请公布日期 |
2007.12.11 |
申请号 |
US20060477306 |
申请日期 |
2006.06.29 |
申请人 |
THE PENN STATE RESEARCH FOUNDATION |
发明人 |
UCHINO KENJI;DONG SHUXIANG;STRAUSS MICHAEL T. |
分类号 |
H01L41/04;H01L41/09;H02N2/00;H02N2/02;H02N2/16 |
主分类号 |
H01L41/04 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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