Full-digital induction heating power supply control system and control method

Abstract

The invention discloses a full-digital induction heating power supply control system and control method. The full-digital induction heating power supply control system comprises a rectification and filtering circuit, a full-bridge inversion circuit, an induction coil and a load module and also comprises a digital signal processing unit and a microcontroller processing unit, wherein the rectification and filtering circuit, the full-bridge inversion circuit, the induction coil and the load module are sequentially connected, the digital signal processing unit and the microcontroller processing unit are connected with each other, the digital signal processing unit is connected with an operating panel, a display module and a communication module, and the microcontroller processing unit is connected with a temperature sensor module, an analog quantity control module and a soft starting and automatic pre-heating control module. The full-digital induction heating power supply control system has the advantages of flexibility, controllability, wide application range, low fault ratio, stable performance and the like.

Description

technical field [0001] The invention relates to a power supply control system, in particular to an all-digital induction heating power supply control system and a control method. Background technique [0002] The traditional induction heating power supply control system based on analog chip control uses analog chips to complete the core actions of the frequency lock phase due to the occurrence of waveforms, so the control chip in the control system only plays the role of start-stop control, simple protection and display Show peripheral effects. For example, take a typical induction heating power supply based on analog technology as an example, use CD4046 hardware phase-locked loop to lock the operating frequency and use SG3525 to generate the waveform required for work. Since CD4046 can only output phase-locked signals, it is impossible to know the phase-locked signal. Deviation, and it is impossible to flexibly control the deviation angle of live lock like software control...

AI Technical Summary

Problems solved by technology

If you want to apply it in different industries, you must carefully adjust the circuit parameters. When the load dynamic range is large (the load characteristic changes greatly with temperature), the stability of the induction heating power supply cannot be guaranteed at all, because there is a general bias in the failure rate. High, relatively unstable performance and other defects

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