Abstract: After analyzing the key techniques on the ultrasonic motor (USM) driving, this paper designs USM driver by the pushpull amplifier and parallel matching inductance circuit based on the enhancement pulse width modulator module (EPWM) of TMS320F28027 DSP. And then this design is tested under the computer simulation on the Multisim software platform. According to the characteristics of USM start, a frequency conversion start mode is also configured. Then, the software and hardware joint debugging on the USM driver is implemented which proves effective and satisfactory.

Key words: ultrasonic motor, parallel resonant, digital signal processor