基于盘型对称驱动的惯性冲击旋转压电马达

该文提出了一种基于盘型对称驱动的惯性冲击旋转压电马达。该马达主要由定子、转子、驱动足和预紧装置组成。马达激励信号为锯齿波信号,采用压电叠堆激励实现马达高功率输出。马达通过螺杆将定子与预紧装置装配于一体,实现了马达结构紧凑化与微型化。设计加工了马达样机并通过实验验证了马达的工作原理,对马达的综合性能进行了分析和测试。测试结果表明,当马达预紧装置施加的预紧力为1 N,输入激励电压峰-峰值为80 V,激励信号频率为1 kHz,且每输出一个周期锯齿波,激励信号延迟100 ms再输出下一个,以研究马达静态启动特性和步长,测得马达的最大空载速度达到3.05 r/min,平均步长为0.032 rad;激励信号频率为3 kHz时,马达的最大空载速度达到9.1 r/min,马达最大负载可达16.2 N·mm;马达在0.5~3 kHz激励信号频率范围内均可实现转动。

Inertial Impact Rotating Piezoelectric Motor Based on Disk Symmetric Drive

An inertial impact rotating piezoelectric motor based on disk symmetric drive is proposed in this paper. The motor is mainly composed of stator, rotor, driving foot and pre-tightening device. The motor excitation signal is sawtooth wave signal, using the piezoelectric stack excitation to realize the high power output of the motor. The stator and the pre-tightening device are integrated through the screw, realizing the compactness and miniaturization of the motor structure. A motor prototype is designed and fabricated, and the working principle of the motor is verified by experiments. The comprehensive performance of the motor is analyzed and tested. The test results show that when the preload applied by the motor pre-tightening device is 1 N, the input excitation voltage is 80 Vp-p, and the excitation signal frequency is 1 kHz, and each cycle of sawtooth excitation signal is output, the next one is output with a delay of 100 ms to study the static starting characteristics and step length of the motor. The measured maximum no-load speed of the motor is 3.05 r/min, and the average step length is 0.032 rad. When the excitation signal frequency is 3 kHz, the maximum no-load speed of the motor is up to 9.1 r/min, and the maximum load of the motor can reach 16.2 N·mm. The motor can rotate within the excitation signal frequency ranging from 0.5 kHz to 3 kHz.