Research on Low-Speed Driving Model of Ultrasonic Motor Based on Beat Traveling Wave Theory

This paper proposes a driving method, the superimposed pulse that can make an ultrasonic motor run at low speed. Although this method solves periodic oscillation of speed in traditional low-speed motor, it still has small fluctuation, which affects stability To reduce fluctuation rate speed, structure model and are established, based on theory beat traveling wave, motion characteristics particle point analyzed paper. The simulation curve is obtained according to stator rotor contact transfer model. research shows introduced causes surface generate end generates intermittent reciprocating vibration drives rotation, mechanism operation when used drive as well reason for improve stability, controlled output performance by changing two control variables—prepressure frequency difference—and concluded variation trend average volatility were consistent with motor’s determinant determinant, respectively, verified velocity measurement experiment experiment. These insights lay theoretical foundation adjustment optimization and, finally, application new prospected.