Full-bridge phase shift induction heating device

Abstract

The invention relates to a full-bridge phase shift induction heating device, which comprises a main circuit for induction heating, a drive control circuit, a current-limiting protection and power regulation control circuit, an overcurrent protection circuit and a frequency tracking circuit, wherein the main circuit comprises four audions, four diodes, a power supply, an inductance, an electric resistance, a current transformer and a capacitance; the drive control circuit is used for outputting four PWM (Pulse-Width Modulation) pulse signals to drive the main circuit, and the four PWM pulse signals are respectively electrically connected to base electrodes of the four audions; the current-limiting protection and power regulation control circuit is electrically connected to the drive control circuit and is used for automatically regulating sizes of phase shift angles among the four audions so as to realize regulation of output power; the overcurrent protection circuit is electrically connected to the drive control circuit and is used for protecting heating power supply overcurrent or short trouble power supply of the full-bridge phase shift induction heating device; and the frequency tracking circuit is electrically connected to the drive control circuit and is used for enabling the frequency of the four PWM pulse signals sent by the drive control circuit and load current frequency of a resonant circuit in the frequency tracking circuit to be synchronized.

Description

technical field [0001] The invention relates to a heating device, in particular to a full-bridge phase-shifting induction heating device. Background technique [0002] At present, household appliances, especially heating devices, have a limited range of power mobilization, and it is difficult to dynamically track the frequency at any time, which does not conform to the development trend of modern heating devices. Therefore, how to provide a heating device with adjustable power and trackable frequency is a key research object for those skilled in the art. Contents of the invention [0003] In view of this, it is necessary to provide a full-bridge phase-shifting induction heating device with adjustable power and trackable frequency. [0004] The present invention is achieved like this, a kind of full-bridge phase-shifting induction heating device, it comprises: [0005] The main circuit is used for induction heating, which includes: four transistors (VT1, VT2, VT3, VT4); f...

AI Technical Summary

Problems solved by technology

[0002] At present, household appliances, especially heating devices, have a limited range of power mobilization, and it is difficult to dynamically track the frequency at any time, which does not conform to the development trend of modern heating devices

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