Research on Automatic Identification Technology of Resonance Frequency of Constant Current Ultrasonic Power Supply Based on DSP
In order to solve the problem that the resonant frequency of transducer is shifted due to temperature rise and load change during processing,this paper uses the resonant frequency identification strategy combining the minimum impedance method and the phase difference control method,and tests the accuracy and consistency of the resonant frequency identification of the power supply by using a constant-current ultrasonic power supply prototype controlled by DSP.The test results show that the maximum difference between the resonant frequency of the transducer identified by the ultrasonic power supply and the resonant frequency measured by the impedance analyzer is 25 Hz,and the error is less than 0.1%.The maximum difference between the resonance frequency measured by laser vibrometer and the resonance frequency identified by ultrasonic power supply is 24 Hz.The ultrasonic power supply was used to test the transducers under three different loads for many times,and the resonance frequency fluctuation range of the transducers identified under the same load was within 15 Hz.
ultrasonic power supplyDSPconstant currentfrequency identification electrode
万方数据
维普
