Electromagnetic induction heating control method and electromagnetic heating device

Abstract

The invention discloses an electromagnetic induction heating control method and an electromagnetic heating device. The electromagnetic heating device comprises an inductance coil panel (L), a resonance capacitor (C2) connected with the inductance coil panel (L) in parallel to form an LC resonance circuit, a direct-current pulse power supply (200), an insulated gate bipolar transistor (IGBT) and acontrol circuit (100), and the control circuit (100) is electrically connected with the grid electrode of the insulated gate bipolar transistor (IGBT) and is used for providing the pulse waves for thegrid electrode of the insulated gate bipolar transistor (IGBT). The electromagnetic heating device further comprises a zero-crossing sampling device (300) which is connected with the direct-current pulse power supply (200) and the control circuit (100) and is used for detecting a zero-crossing signal of a voltage outputted by the direct-current pulse power supply (200) and sending the zero-crossing signal to the control circuit (100), and the control circuit (100) outputs a pulse wave in accordance with the zero-crossing signal. The electromagnetic induction heating control method and the electromagnetic heating device are ingenious in design and high in practicability.

Description

technical field [0001] The invention relates to the field of electromagnetic heating, in particular to an electromagnetic induction heating control method and electromagnetic heating equipment. Background technique [0002] Traditional single-resonance electromagnetic induction heating controllers have bottlenecks such as narrow continuous heating power range and difficulty in reducing heating power. Taking conventional household induction cookers as an example, the general continuous power range is 800W-2200W; power below 800W will use high-power intermittent heating To achieve this, due to the large noise when starting and stopping, the switching frequency cannot be too high, so the instantaneous power fluctuates greatly and affects the cooking effect. If low-power continuous heating is required, it is generally necessary to change the circuit topology, drive voltage, resonance parameters, etc., but this will lead to problems such as increased cost, complicated circuit, sh...

AI Technical Summary

Problems solved by technology

[0002] Traditional single-resonance electromagnetic induction heating controllers have bottlenecks such as narrow continuous heating power range and difficulty in reducing heating power. Taking conventional household induction cookers as an example, the general continuous power range is 800W-2200W; power below 800W will use high-power intermittent heating To achieve, due to the large noise when starting and stopping, the switching frequency cannot be too high, so the instantaneous power fluctuation is large, which affects the cooking effect

If low-power continuous heating is required, it is generally necessary to change the circuit topology, drive voltage, resonance parameters, etc., but this will lead to problems such as increased cost, complicated circuit, short life of key components, and increased operating noise.

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