Control method and electromagnetic hob

By detecting the coupling differences between adjacent resonant heating modules and adopting a time-sharing control method, the problems of power device reliability and magnetic field interference in multi-coil induction cookers were solved, and stable and efficient heating of the induction cooker was achieved.

CN122120988APending Publication Date: 2026-05-29FOSHAN SHUNDE MIDEA ELECTRICAL HEATING APPLIANCES MFG CO LTD
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
FOSHAN SHUNDE MIDEA ELECTRICAL HEATING APPLIANCES MFG CO LTD
Filing Date
2024-11-29
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

In multi-coil induction cookers, when the resonant circuit operates under poor conditions, the power devices may face high voltage and current stress, leading to reliability issues such as thermal failure and electrical breakdown of IGBT transistors, as well as mutual magnetic field interference and noise.

Method used

By detecting the coupling difference between adjacent resonant heating modules, a time-sharing control method is adopted to make adjacent resonant heating modules alternately heat the pot, ensuring that the drive power tube works under stable conditions and eliminating magnetic field interference and noise.

Benefits of technology

This improves the reliability of the drive power transistor, eliminates magnetic field interference and sharp noise, and ensures the stable operation of the induction cooker.

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Abstract

The application discloses a control method and an electromagnetic stove. The control method is used for a resonant heating circuit comprising a power supply module, a plurality of resonant heating modules, a plurality of driving power tubes, a control module and a plurality of driving modules. The control module is used for outputting a control pulse signal for controlling the driving power tubes to be turned on or turned off. The driving module is used for receiving the control pulse signal output by the control module and controlling the driving power tubes to be turned on or turned off according to the control pulse signal. The control method comprises the following steps: detecting a coupling difference value between two adjacent resonant heating modules; if the coupling difference value is greater than a preset difference value, the driving power tubes corresponding to the two adjacent resonant heating modules are controlled to be turned on in time, so that the two adjacent resonant heating modules alternately heat a pot. In the resonant heating circuit connected by the single-tube topology, the two adjacent resonant heating modules are used to alternately heat the pot, the reliability of the driving power tubes is improved, and the magnetic field interference and the sharp noise are eliminated.
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