Electromagnetic induction heating control method and electromagnetic heating device
A technology of heating equipment and control circuit, applied in the field of electromagnetic induction heating control and electromagnetic heating equipment, can solve the problems of large noise, large working noise, large instantaneous power fluctuation, etc., to expand the power range, reduce operating noise, start low current effect
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[0044] The technical problem to be solved by the present invention is: the existing electromagnetic heating equipment with a power of less than 800W will adopt high-power intermittent heating to achieve. Due to the large noise during start and stop, the switching frequency cannot be too high, so the instantaneous power fluctuates greatly and affects cooking Effect: If low-power continuous heating is required, it is generally necessary to change the circuit topology, driving voltage, resonance parameters and other methods to achieve this, but it will lead to higher costs, more complex circuits, shorter life of key components, and greater operating noise And other issues. The technical idea proposed by the present invention is to detect the zero-crossing point of the power supply voltage, and input a small pulse width driving voltage to the gate of the insulated gate bipolar transistor IGBT before the zero-crossing point, so as to integrate the insulated gate bipolar transistor IG...
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