材料对超声电动机性能的影响及其选择

超声电动机是利用压电陶瓷的逆压电效应，将电能转换为机械能的一种压电换能器，因而压电材料对电动机的性能起着至关重要的作用。超声电动机是靠摩擦驱动，将定子的振动能转换为转子的旋转机械能。而压电片与定子、摩擦材料与转子的连接都要靠胶完成。因此，摩擦材料、胶粘剂也是影响电动机性能的重要材料。文中结合系列环形行波型超声电动机样机制作的成功经验，分析了这些材料对超声电动机性能的影响，并对这些材料的选择进行了较详细的讨论。

Material's Affection on Performance of Ultrasonic Motor and Their Selection

Ultrasonic motors are a kind of motor which using inverse piezoelectric effect of piezoelectric ceramic converts electrical energy into mechanical energy. So piezoelectric ceramic material is very important for motor's performance. Ultrasonic motors are driven by friction force and convert stator's resonant vibration energy to rotor. Moreover the connection of piezoelectric ceramic and stator or friction material and rotor are fulfilled through glue. Therefore friction material and adhesive glue are also important materials for the motor's performance. A series of ring-type traveling wave ultrasonic motors fabricated by our group is introduced in this paper. The materials' affection on performance of motors is analyzed. And the selection of these materials is also discussed.