Improvement of energy conversion efficiency in traveling wave rotary ultrasonic motor by increasing friction coefficient
Hucheng Chen, Hongli Ji, Jinhao Qiu
Abstract
This article introduces a method of enhancing the energy conversion efficiency of a traveling wave rotary ultrasonic motor with a flexible rotor by increasing the friction coefficient at the stator–rotor interface. The increased friction coefficient leads to improvements in energy conversion efficiency by increasing the output power and reducing friction loss power. Experimental verification showed that the friction coefficient in the interface increased from 0.21 to 0.32, the maximum energy conversion efficiency increased from 36.8% to 46.3%, and the interface friction loss was reduced.
Topics & Concepts
Ultrasonic motorTraveling waveAcousticsUltrasonic sensorEnergy transformationMaterials scienceRotary engineFriction coefficientEnergy conversion efficiencyMechanical energyEnergy (signal processing)Electromechanical coupling coefficientMechanical engineeringPhysicsPiezoelectricityEngineeringComposite materialOptoelectronicsMathematicsMathematical analysisPower (physics)ThermodynamicsQuantum mechanicsPiezoelectric Actuators and ControlSoft Robotics and ApplicationsIterative Learning Control Systems