Multi-freedom ring stator supersonic dynamo

An ultrasonic motor, annular stator technology, applied in the direction of generators/motors, piezoelectric effect/electrostrictive or magnetostrictive motors, electrical components, etc. Difficult to control the size, limited application range and other problems, to achieve the effect of solving the problem of pre-pressure application, compact structure and wide application space
CN1835374AInactive Publication Date: 2006-09-20NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Publication Date
2006-09-20
Estimated Expiration
Not applicable · inactive patent

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Abstract

The ultrasonic motor is composed of stator module, spherical rotor, and bracket module. The stator module consists of a pair of up and low stator ring, and a pair of unidirectional piezoelectric ceramic ring polarized in axial direction ceramic. Fan shaped electrodes are plated on surface of piezoelectric ceramic along circumferential even zones. The rotor is held in middle of two stator rings. Effect of pressure bolts and elastic support boards provides pre-stressing between stator and rotor. Through different fan shaped electrodes, drive signals are supplied to ceramic rings to make stator rings generate traveling wave to drive spherical rotor so as to realize bidirectional rotation around axial line of stator ring; or generate standing wave at different positions to drive spherical rotor so as to realize bidirectional rotation around axial line of passing through center of rotor and perpendicular to axis of stator rings. Features are: large moment and reliable operation.
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Description

1. Technical Field:

[0001] The annular stator multi-degree-of-freedom ultrasonic motor of the present invention belongs to the field of ultrasonic motors. 2. Background technology:

[0002] Ultrasonic motor is a new type of power output device that uses the inverse piezoelectric effect of piezoelectric ceramics and ultrasonic vibration. At present, multi-degree-of-freedom ultrasonic motors mostly adopt tubular stator and spherical rotor structures. The bending vibration and longitudinal vibration of the stator tube are used to realize the rotation of the three rotating shafts of the rotor. The pre-pressure between the stator and the rotor has not been simple and effective. At present, it is mostly realized by the weight of the rotor ball, which makes its driving force smaller. In addition, due to the need to use the longitudinal resonance mode of the stator tube, it is difficult to control the axial size of the stator, which is not conducive to miniaturization and the application...

Claims

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