Insulation Optimization Design of End Excitation Linear Ultrasonic Motor
For coupled-mode linear ultrasonic motor based on end excitation,the distance between the sil-ver-plated surface of the piezoelectric ceramic and the protruding structure of the metal elastomer was rela-tively close,which limited the amplitude of the applied voltage and had a significant impact on the driving performance of the motor.This article optimized the protruding structure of the metal elastomers by designing a protruding structure based on air insulation and a composite protruding structure based on resin insulation.Theoretical analysis shows that although the protruding structure motor based on air insulation has the smal-lest maximum electric filed intensity,which is favorable for insulation,its driving performance is weak.The composite protruding structure motor based on resin insulation has a relative balance of insulation perform-ance and driving performance.The article made a prototype and conducted experiments.Comparing to the traditional coupled-mode standing wave linear ultrasonic motor based on end excitation,the experimental re-sults showed that maximum no-load speed of the composite protruding structure motor with resin insulation had a significant improvement,which was from 41.56 mm/s to 72.40 mm/s.
万方数据
维普
