Research on Driving Technique for Traveling Wave Ultrasonic Motor

Considering the special working principle and the special requirements of driving power supply for traveling wave ultrasonic motors, its driving techniques about switching power supply are outlined in detail based on analyzing the electrical model, subsequently, a review technique about DDS and its development is provided .Finally, some key problems, such as improvement of driving system,system miniaturization and direct digital synthesizer are discussed, some of their solving schemes and the direction of studies on driving power supply are put forward.