Related Experiment Video
Updated: Mar 22, 2026

Multiplexing Focused Ultrasound Stimulation with Fluorescence Microscopy
Published on: January 7, 2019
Optimal working frequency of ultrasonic motors
Weijia Shi1, Hui Zhao1, Jie Ma1
1Control and Simulation Center, School of Astronautics, Harbin Institute of Technology, Harbin 150001, China.
Abstract:
In this work, the existence of the optimal working frequency for ultrasonic motors (USMs) is theoretically and experimentally verified for the first time, at which working point the power dissipation of the motors arrives at its minimum value. The mathematical model of the mechanical quality factor is initially deduced to evaluate the loss level, because it shows an opposite tendency with losses. The derivative of the mechanical quality factor can be subsequently arrived at with the aid of the phenomenon model of the phase of the admittance. The theoretical derivation infers that the maximum value of the mechanical quality factor exists almost around the average value of the frequency of maximum conductance and the frequency of maximum resistance. Then the input power of the USM is measured under the constant velocity condition, which is supposed to counteract the loss; that is, the loss can be therefore evaluated experimentally. Measurements infer that the power dissipation of the motor reaches the minimum value around the calculated optimal working frequency. In other word, it is proven that the USM maintains an optimal working frequency from the loss reduction view point.
More Related Videos
08:32Assembly and Characterization of an External Driver for the Generation of Sub-Kilohertz Oscillatory Flow in Microchannels
Published on: January 28, 2022
09:21Experiments on Ultrasonic Lubrication Using a Piezoelectrically-assisted Tribometer and Optical Profilometer
Published on: September 28, 2015
Related Concept Videos
Muscle Stimulation Frequency
Wave summation
At low firing rates, motor neurons induce individual twitch contractions in muscle fibers. These twitches...
Forced Oscillations
Design Example: Underdamped Parallel RLC Circuit
Starting with a fixed...
Concept of Resonance and its Characteristics
Ultrasonography
During an ultrasonography procedure, a handheld device called...
Standing Waves in a Cavity