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Research on Full Bridge Phase-shifting Ultrasonic Power Based on DSP

Author: HanMeng
Tutor: GeHongJuan
School: Nanjing University of Aeronautics and Astronautics
Course: Proceedings of the
Keywords: Ultrasonic power supply Matching circuit Phase shift strategy Power Control Frequency tracking
CLC: TM46
Type: Master's thesis
Year: 2011
Downloads: 115
Quote: 0
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Abstract


In recent years , ultrasonic cleaning technology is good for its cleaning effect , high degree of automation , has been more and more widely . The ultrasonic power is the core part of the ultrasonic cleaning machine , its performance more directly determine the pros and cons of the ultrasonic cleaning effect . Therefore, the research and production of higher technical level ultrasonic power has become the key to improve ultrasonic cleaning machine cleaning effect . Due to the lack of in-depth study of domestic ultrasonic power supply , and the demand of the domestic market for ultrasonic cleaning machine is increasing , so the ultrasonic power to conduct in-depth research has an important significance . The subject analysis of ultrasonic power supply impedance of the load characteristics , the design of the tuning and matching circuit to compensate for the capacitance transducer to improve the power factor , and by the design of the main transformer for impedance matching of the load to improve the power transmission efficiency . In this paper, the ultrasonic power supply of the power control in the study , using the power control method based on the phase shift PWM (PS-PWM) strategy , by adjustment and control of the phase shift angle of the output power with a given power consistent . Ultrasonic power in the course of their work must be real-time tracking of the load resonant frequency changes , and adjust the switching frequency to keep pace with them . In this paper, the ultrasonic power frequency automatic tracking of several methods , by analyzing the comparison to determine the phase system is the best option , and redesigned the frequency tracking method based on the phase of the program to improve the hardware circuit and control procedures , experiment The results show that the frequency tracking to good effect . Ultrasonic power in this topic based on DSP control chip model TMS320LF2407, its powerful feature allows more precise control of ultrasonic power , higher performance and efficiency of the power .

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CLC: > Industrial Technology > Electrotechnical > Transformers, converters and reactors > Converter
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