Ultrasonic Motor Drive And Its Application In Servo Motor Braking

Based on the ultrasonic motor,a set of friction brake speed control system is designed.Due to the fast response of ultrasonic motor and high movement accuracy,the system can realize the rapid and accurate change of speed and realize the control of speed.the structure of the friction braking system is designed and the rotational speed of a rotating disk is precisely controlled by the ultrasonic motor.Ultrasonic motor with small size,light weight,slow speed,torque,fast response,high accuracy,noise-free operation,free from magnetic interference.Due to its small size,fast response and self-locking,the TRUM40 annular traveling wave ultrasonic motor,which was independently developed in this paper,is selected as the power source of the brake speed control system.The main content of this article:First of all,introduce the development and current situation of ultrasonic motor and its control technology.Secondly,the mechanical structure,simulation load selection and driving control system based on ultrasonic friction brake speed control platform are introduced.In addition,the design of driving control circuit is introduced.Combining the structure of half-bridge and full-bridge topology motor driving circuit,a new motor driving scheme-three-phase bridge motor driving scheme is proposed.The three-phase bridge inverter process is analyzed.Circuit,step-up transformer and ultrasonic motor matching circuit,and the matching circuit on the efficiency of the drive circuit have a greater impact,and then introduced the matching principle and matching circuit calculation method,the choice of suitable inductors and capacitors to maximize the Improve the efficiency of the drive circuit;serial communication circuit is responsible for communication with the host computer,the design based on Labview PC program and PSoC5 based on the lower computer program,the host computer is mainly responsible for sending the target speed command,real-time rendering display simulation load speed curve,The realization of human-computer interaction,the next crew software is responsible for generating drive signals and control algorithms,PID and fuzzy control algorithm to achieve its high-precision,The experiment proved that the friction braking system is feasible,the simulated load speed can quickly reach the set speed,and the speed fluctuation rate is small.