Electromagnetic induction heating system and temperature detection method

Abstract

The invention discloses an electromagnetic induction heating system. The electromagnetic induction heating system comprises an oscillation circuit, a frequency detection circuit and an over-load protection circuit, wherein the oscillation circuit is used for generating eddy current and used for heating devices; the frequency detection circuit is used for detecting oscillation frequency of an LC resonance circuit and used for transmitting frequency variation to an MCU in an SOC integrated circuit; the over-load protection circuit is used for transmitting an instantaneous peak current signal of a switch element to the MCU in the SOC integrated circuit and used for protecting the switch element; the oscillation circuit comprises the SOC integrated circuit for reckoning a magnetic core material variation degree and calculating temperature variation, an oscillation feedback circuit for transmitting a feedback signal to the MCU in the SOC integrated circuit, the LC resonance circuit for generating a high-value oscillation frequency, and the switch element; the high-value oscillation frequency is within 50K-100K. By adopting the scheme, an appropriate heating method can be selected, so that the purpose of protecting a large-power switch element is achieved, control on the temperature of the electromagnetic induction heating system can be achieved, and the electromagnetic induction heating system is smart in design and good in practicability.

Description

technical field [0001] The invention relates to the field of cooking utensils, in particular to an electromagnetic induction heating system and a temperature detection method. Background technique [0002] Different magnetic core materials in the electromagnetic induction heating system have different magnetic permeability, and the magnetic permeability of some magnetic cores will change accordingly due to changes in temperature, and these changes will in turn affect the oscillation frequency of the electromagnetic induction heating system. The change of resonance frequency further affects the performance of high-power components: if the oscillation frequency changes sharply, it will cause fatal damage to high-power components. How to choose different heating methods by detecting the change of magnetic core material? It is a problem to be solved by the present invention to control the heated material and avoid unnecessary damage to the circuit components. [0003] On the ot...

AI Technical Summary

Problems solved by technology

[0004] The invention proposes an electromagnetic induction heating system aiming at the problem that the change of the magnetic core material in the electromagnetic heating system in the cooking appliance will cause damage to the high-power switching element and the temperature control in the heating process

Images