摘要
介绍了一种采用空间移相代替时间移相,实现电机调速控制的新型空间调相环形行波超声波电机。设计了新型压电陶瓷极化分区方案,利用四个电源在超声波电机定子上激励出四个驻波,四个驻波两两具有相同幅值或相同时间相位;根据波形叠加原理,具有相同时间相位的驻波叠加成一个新的合成驻波,通过改变两个原始驻波的幅值关系使合成驻波在空间的位置发生改变,进而达到空间移相的目的;研究了电源幅值和空间相位角的关系,推导了新型超声波电机的波形及速度表达式;在研究了新型超声波电机的幅值控制和相位控制的基础上,设计了空间调相环形行波超声波电机的的幅相控制方案。仿真及实验结果验证了理论分析。
A novel ring-type travelling-wave ultrasonic motor based on space phase modulation is introduced, and the motor speed is controlled by space phase instead of the time phase. New piezoelectric ceramic electrode configuration is designed, and four stator standing waves are produced. Every two of them are same as the vibration amplitude or same as the time phase. Based on the principle of waveform superposition, a new standing wave is composed by two standing waves who are the same as time phase, and the space position of composite standing wave would be changed when the vibration amplitudes of two standing waves are changed. Then space phase of ultrasonic motor is controlled. Relationship between power and space phase is studied, waveform and speed function of the novel motor are deduced. With the study of amplitude control and phase control, the phase-amplitude control of novel ultrasonic motor is developed. Simulation and exoeriment results confirm the theory analysis.
出处
《电工技术学报》
EI
CSCD
北大核心
2014年第3期132-142,共11页
Transactions of China Electrotechnical Society
基金
国家自然科学基金资助项目(51077011
51177014)
关键词
超声波电机
空间相位
幅相控制
Ultrasonic motor, space phase, amplitude-phase control
