一种基于串联谐振升压原理的超声波电机驱动电路

For real application of Traveling Wave Ultrasonic Motor (USM), it is necessary to decrease the size of the drive circuit. This paper analyzed the driving mechanism of the USM, obtained that even the AC voltage has DC bias, it can also drive the USM to be running. Based on LC series resonant and the USM equivalent circuit, a kind of drive circuit scheme has been designed. The parameter of the circuit is depend on the LC amplitude-frequency characteristics. In the end, this paper showed the experiment result in figures, it proved the feasibility of this drive circuit scheme. At the same time, this scheme eliminated the use of transformer, effectively reduced the size of circuit.