Rotary Type Ultrasonic Motor with Bending Spokes

In this paper, the rotary type ultrasonic motor with bending spokes using radial mode, which can improve the output performance of ultrasonic motor and decrease the cost of manufacture, is presented. The proposed ultrasonic motor has good performance in the output torque and speed. The structure is simple and compact, so it has low dependence on the machining precision. The voltage to drive the motor is low and excitation method is simple. It is suitable for large-scale industrial application also due to its low production cost and reliable output. The current ultrasonic motor is designed for small size flying objects. Moreover, it can be used in miniature helicopter motors and micro-electronic equipment zoom systems such as capsule endoscope, electronic eyeball, SLR camera, smart phone, etc. The proposed motor has a wide application prospect in robot, medical device, micromechanical and aerospace science and technology field. Numerical simulations and experimental outcomes are given. The experimental investigation of the motor has confirmed the main results of numerical analysis and has given an opportunity to create high speed rotation.