division situation of piezo ceramic electrode

Placing a rotor on the surface of the stator to be pushed and rotated. Shown that the division situation of piezo disc transducer electrode , the electrode is divided into 4 parts, it is A phase, B phase, isolated pole and 3 unpolarized areas, a total of 20 areas is including A, B two phases .each contains have 6 areas, The solitary pole is S1, and the A phase includes S2. S7, B phase includes S8. In the S13, the polarity of two adjacent regions is opposite, and the polarity of the region is represented by “+” and “one” respectively, and the size of each region about 45Khz piezo disc is to ensure that the vibrations in the adjacent two regions to form a complete waveform. 

When a sinusoidal voltage is applied in Phase A and cosine voltage is applied in Phase B, in order to ensure that the phase difference of piezo discs crystal is 7 ratios, the two-phase space should be different by M, so the unpolarized region is the size of d4, and the M region at the lower end of the piezoelectric disk element is used as the detection electrode resonance state. One of the sensors, the upper 3L/4 area as a common ground. It is assumed that the standing wave excited by the A-phase voltage .piezoelectric material that is a vibration generator of an ultrasonic motor, and is a core element that converts the electrical energy of the piezoelectric ceramic into mechanical energy. The performance of the piezo ceramic cylinder directly affects the output performance of the entire ultrasonic motor. This section prepares P-41 and PMnS-PZN material.

 PZT piezoelectric ceramics discuss the impact of ceramic on the performance of ultrasonic motor. The experimental equipments are used by the analytical balance with a precision of 0.0001 g; the ball grinding tank and the ball grinding medium are agate materials; due to the large number of components and complex components, the P4 material piezoelectric disk has a complete perovskite structure. The pre-synthetic process is used to preferentially synthesize PZT with perovskite structure and then formulate PMnS material. the formula of PZT material   is as follows: Pb (Mnl, 3Sb2/3) 03. Pb(Znl/3 N'b2/3)03. Pb (Zro.5Tio.5)03. P-41 material piezoelectric ceramic prepares process of PMnS. The PZT is the same except that the sintering temperature is slightly lower. Experiments are used for Pb304, Zr02, Ti02, SrC03, BaC03, Bi203, MnC03, and Fe203.