Multi-free degree ultrasonic wave electromotor based on piezoelectric porcelain cut strain
An ultrasonic motor, piezoelectric ceramic technology, applied in the direction of piezoelectric effect/electrostrictive or magnetostrictive motors, generators/motors, electrical components, etc., can solve the influence of stator vibration mode, incomplete size and shape The same problem, increasing the complexity of driving circuit design, etc.
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[0019] The present invention is described in more detail below in conjunction with accompanying drawing example:
[0020] Referring to Fig. 1, the multi-degree-of-freedom ultrasonic motor based on piezoelectric ceramic shear strain consists of a rotor 1, a stator 2 and a clamping base 3. Combined with Figure 2 and Figure 3 at the same time, the stator is composed of a vibrator column 6 and four piezoelectric ceramics 7 pasted on the four sides of the vibrator column. The electrode 8 on the upper layer of each piezoelectric ceramic is composed of four equal partitions, and the electrode on the lower layer is a whole. The electrodes and the stator are clamped on the base by clamping screws 4, and the clamping point is the node of the vibration mode of the stator. A permanent magnet 5 is installed below the clamping base to apply a pre-tightening force to the rotor. PZT4 is selected for the piezoelectric ceramic, and stainless steel, copper or phosphor bronze is selected for the...
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