Research On High-power Super Audio Frequency Induction Heating Power Supply Based On DSP

With the development of manufacture technology, super audio frequency induction heating power's application in modern production is playing an increasingly important role by its virtues. While induction heating power is quickly developing, it has defects in the aspects of digital controller and capacity and so on. This paper mainly researches on the super-audio induction heating power theoretical knowledge and the digital control system of based-on TMS320F2812 DSP.Firstly, the paper researches on the induction heating power main circuit, analyses the difference about the resonant load and different combinations, combines with the actual need, determined voltage series resonance circuit. By analyzing and comparing, BUCK converter scheme regulation is adopted as power modulation method, then the parameter of component is calculated to supply basis for making model machine.Induction heating power's control system contains of BUCK converter control in rectifier and frequency tracking control in inverter. The power's control is used by DSP'S module to output pulse for BUCK converter, control of inverter mainly contains frequency tracking, driving and protecting of IGBT. The paper finally determined the digital control system of based on TMS320f2812 DSP, and designed the corresponding peripheral circuits and programmed software.The design and control implement of main circuit are through the simulation and experiments. The modeling analysis in MATLAB and pspice environment is for based on the FUZZY-DPLL control policy's and the main circuit of induction heating power source, The simulation results and some tests have proved that the design in this paper is reasonable, and the analysis of the circuits are correct.