压电粘滑旋转电机的设计

Design of a Piezoelectric Stick-Slip Rotary Motor

该文提出了一种结构简单紧凑的压电粘滑旋转电机。通过一个力偶式机构设计了定子,并在此基础上设计出双定子压电粘滑旋转电机,提升了电机结构的紧凑性。通过在典型锯齿波上改造而成的一种异步驱动方式,使电机能够实现“增粘减滑”。建立了电机机电-摩擦耦合动力学模型,制作出电机的样机并进行相应的实验。实验结果表明,电机输出位移曲线显示出良好的步进特性,当驱动电压幅值为150 V、频率为900 Hz时,电机输出的最大单步转角、转速分别为125μrad和6.3(°)/s,最大可承负载为30 g。

In this paper,a simple and compact piezoelectric stick-slip rotary motor is proposed.The stator is designed by a force-coupled mechanism,and a double-stator piezoelectric stick-slip rotary motor is designed on this stator to improve the compactness of its structure.An asynchronous drive method is modified according to a typical sawtooth wave to enable the motor to achieve“increasing stickiness and reducing slippage”.An electromechanical-frictional coupling dynamics model of the motor is established,and a prototype motor is built and experimented accordingly.The experimental results show that the motor output displacement curve shows good stepping characteristics.The maximum single-step rotation angle and speed of the motor are 125μrad and 6.3(°)/s respectively when the driving voltage amplitude is 150 V and the frequency is 900 Hz,and its maximum load capacity is 30 g.