Ultra-low speed dynamometer based on ultrasonic antifriction principle

Abstract

The invention discloses an ultra-low speed dynamometer based on an ultrasonic antifriction principle. The ultra-low speed dynamometer includes two parts of a motor speed torque measurement and controlmachine and a torque generator, and the torque generator is fixed on a base of the motor speed torque measurement and control machine. According to the ultra-low speed dynamometer based on the ultrasonic antifriction principle, sinusoidal waves of different frequencies can be applied to a single phase according to an ultrasonic antifriction phenomenon of a traveling wave type ultrasonic motor, and adjustable torque can be obtained by measuring a motor; and the defects of creep performance, load instability and inaccurate measurement data generated by dynamometers in market when the motor speed is lower than a certain value are overcame so that stable and adjustable torque can be obtained in the motor low speed operation process.

Description

technical field [0001] The invention relates to the technical field of motors, in particular to an ultra-low-speed dynamometer based on the principle of ultrasonic friction reduction. Background technique [0002] Motors are widely used in industry. In order to detect all the performance of motors from no-load to stalled rotor, dynamometers are often used in industry to measure the speed and torque of motors. Dynamometers are generally divided into hydraulic dynamometers, eddy current dynamometers, magnetic powder dynamometers, hysteresis dynamometers and electric dynamometers. However, the dynamometers on the market have the disadvantages of poor low-speed loading performance, creeping phenomenon, unstable vibration loading and inaccurate measurement data when the motor speed is lower than a certain value, especially the magnetic powder dynamometer needs magnetic powder. In the case of uneven distribution of magnetic powder, low-speed loading will oscillate, making the mea...

AI Technical Summary

Problems solved by technology

However, the dynamometers on the market have the disadvantages of poor low-speed loading performance, creeping phenomenon, unstable vibration loading and inaccurate measurement data when the motor speed is lower than a certain value, especially the magnetic powder dynamometer needs magnetic powder. In the case of uneven distribution of magnetic powder, low-speed loading will cause oscillations, making the measurement results incorrect and even damaging the test object

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