斜槽深度对模态转换型超声波电机性能的影响

Impact of the Depth of Diagonal Slits on the Output Characteristics of the Ultrasonic Motor Using a Longitudinal-torsional Vibration Converter

研制Φ20 mm的3台不同斜槽深度的纵扭模态转换型超声波电机样机.采用激光转速表测量电机样机的输出转速,对3台电机样机的输出转速特性进行对比分析.结果表明：斜槽深度对电机样机输出转速有明显影响.3台电机样机中,斜槽深度为1.5 mm的样机的输出转速最好,在谐振频率40.5 kHz时,输出转速为133r/min;斜槽深度为0.5 mm的样机的输出转速最差,在谐振频率40.8 kHz时,输出转速为18.9r/min.斜槽深度为2.5 mm的样机更适合大输出力矩.

Three ultrasonic motor prototypes with the diameter of Φ20 mm using a longitudinal-torsional vibration converter with diagonal slits were developed,which had different depths of diagonal slits. The revolution speed was measured by a laser tachometer. The output speeds of three prototypes were compared. The results indicate that the structure of diagonal slits has an obvious influence on the output speed. The output speed is the best for the prototype with 1. 5 mm-depth of diagonal slits. The maximum revolution speed of the prototype is 133 r/min at frequency of 40. 5 kHz. The output speed is the worst for the prototype with 0. 5 mm-depth of diagonal slits. The maximum revolution speed of the prototype is 18.9 r/min at frequency of 40.8 kHz. And the prototype with 2.5 mm-depth of diagonal slits is more suitable for large output torque.