Micro ultrasonic motor based on longitudinal vibration mode and driving method of microminiature ultrasonic motor
A technology of ultrasonic motor and driving method, which is applied in the direction of generator/motor, piezoelectric effect/electrostrictive or magnetostrictive motor, electrical components, etc., which can solve the problems of insufficient compact size and inability to meet positioning requirements, and achieve Simple structure, small size, fast effect
Pending Publication Date: 2021-10-19
JILIN UNIV
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Problems solved by technology
The size of the current linear ultrasonic motor still has the problem of not being compact enough to meet the positioning requirements in extremely small space sizes
Method used
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[0019] The detailed content of the present invention and its specific implementation will be further described below in conjunction with the accompanying drawings.
[0020] see Figure 1 to Figure 4 As shown, a micro ultrasonic motor based on the longitudinal vibration mode is characterized in that: it is composed of a base 1, a stator 2, and a mover 3; the stator 2 is fixedly connected to the base 1, and the mover 3 Clamped on the elastic body 2-3 in the stator 2 in an adaptive preloaded manner.
[0021] The stator 2 is composed of a piezoelectric sheet a2-1-1, a piezoelectric sheet b2-1-2, a piezoelectric sheet c2-2-1, and a piezoelectric sheet d2-2-2; the piezoelectric sheet a2 -1-1 and the piezoelectric sheet b2-1-2 are respectively pasted on the upper and lower surfaces of the longitudinal vibration part a2-3-2 of the elastic body 2-3; the piezoelectric sheet c2-2-1 and the piezoelectric sheet d2 -2-2 are respectively pasted on the upper and lower surfaces of the longit...
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The invention relates to a microminiature ultrasonic motor based on a longitudinal vibration mode and a driving method of the microminiature ultrasonic motor. The microminiature ultrasonic motor comprises a base, a stator and a rotor; and the stator is fixedly connected to the base, the rotor is clamped on an elastic body in the stator in a self-adaptive pre-tightening manner, and two groups of piezoelectric patches are bonded on the elastic body. According to the microminiature ultrasonic motor, the two groups of piezoelectric patches are used as driving sources which are respectively used for exciting longitudinal vibration of a longitudinal vibration part a and a longitudinal vibration part b in the elastic body, and the longitudinal vibration in two directions is synthesized into sawtooth waves so as to drive the rotor to move linearly. The microminiature ultrasonic motor has the advantages of being simple in structure, small in size, low in cost, convenient to machine, easy to integrate and the like; large-scale production and commercial application of the microminiature ultrasonic motor can be achieved; and the microminiature ultrasonic motor has high practical value in the aspects of precise driving and positioning in occasions with limited application space.
Description
technical field [0001] The invention relates to the technical field of micro-special motors, in particular to a micro-miniature ultrasonic motor based on a longitudinal vibration mode. The ultrasonic motor utilizes the principle of ultrasonic excitation of elastic bodies to resonate and synthesize sawtooth waves, and has the characteristics of simple structure, small size and fast speed. , suitable for precise positioning and driving of objects in tiny spaces. Background technique [0002] With the development of science and technology, high-tech fields such as aerospace engineering, biomedical engineering, ultra-precision machining, and micro-electromechanical systems have put forward requirements for high-precision, small-volume, and large-stroke driving devices, and piezoelectric actuators Because of its advantages of simple structure, high precision, fast response, and free from electromagnetic interference, it has attracted widespread attention. Since the output displa...
Claims
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Login to View More IPC IPC(8): H02N2/02H02N2/06
CPCH02N2/021H02N2/062
Inventor 黄虎李轩徐智
Owner JILIN UNIV