Method and device for testing startup characteristics of ultrasonic motor based on single electrode feedback

Abstract

The invention relates to a method and device for testing startup characteristics of an ultrasonic motor based on single electrode feedback. The device is composed of an ultrasonic motor, a single electrode signal detecting and processing module, a load disk, a weight, a transmission shaft, an external fixed pulley and a high-precision photoelectric encoder. The load is changed through changing the weight hanging mode of the external fixed pulley, and thus startup characteristics of the ultrasonic motor under different loads are tested. According to the method and device, a single electrode feedback signal is utilized to act as a starting point signal for testing the startup characteristics of the ultrasonic motor, that is, the moment when the signal is acquired is defined as a starting point of a startup characteristic test for the ultrasonic motor, and the moment when the output of the ultrasonic motor reaches 95% of the target speed act as a termination point of the startup characteristic test for the ultrasonic motor. At present, tests for the startup response time of the ultrasonic motor mainly use the moment when 5% of the average speed is reached of motor startup as a startup starting point, the method and device provided by the invention consider that the period of time from acquisition of an electric signal from the ultrasonic signal to the moment when 5% of the target speed is reached should also be included in the startup response time of the ultrasonic motor.

Description

A method and device for testing the starting characteristics of an ultrasonic motor based on isolated pole feedback technical field The invention relates to a testing technology for starting characteristics of a motor, in particular to a testing technology for starting response characteristics of an ultrasonic motor, in particular to a testing method and device for starting characteristics of an ultrasonic motor based on isolated pole feedback. Background technique Ultrasonic motor is a micro motor with a new concept. It uses the inverse piezoelectric effect of piezoelectric materials to excite vibrations at ultrasonic frequencies, and generates rotational (linear) motion through the friction between the stator and rotor, output power, drive load. Ultrasonic motors have the advantages of compact structure, low-speed high-torque, fast response, direct drive of loads, and no electromagnetic interference. with broadly application foreground. According to the characteristic...

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Problems solved by technology

The purpose of the present invention is to solve the problem that the existing ultrasonic motor starting characteristic method cannot accurately reflect the motor characterist

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