Multi-ring electromagnetic heating circuit with common drive signal

Abstract

The invention belongs to the field of electromagnetic heating, and particularly relates to a multi-ring electromagnetic heating circuit with a common drive signal. The multi-ring electromagnetic heating circuit comprises a central processing unit (MCU), a driving signal processing circuit, a driving circuit, a resonant circuit and a sampling circuit; a driving signal output end of the MCU is connected to an input end of the driving signal processing circuit; at least two branch circuits are respectively arranged on the driving circuit, the resonant circuit and the sampling circuit; the numbers of the branch circuits on the driving circuit, the resonant circuit and the sampling circuit are the same; an output end of the driving signal processing circuit is simultaneously connected with control input ends of the branch circuits on the driving circuit and used for simultaneously controlling the branch circuits on the driving circuit; the branch circuits on the driving circuit, the branch circuits on the resonant circuit and the branch circuits on the sampling circuit are sequentially and correspondingly connected; output ends of the branch circuits on the sampling circuit are connected to an input end of the MCU. In the method, a plurality of branch circuits on the resonant circuit are controlled by common drive, so the hardware cost is reduced, and the noise is eliminated.

Description

Technical field [0001] The patent of the invention belongs to the field of electromagnetic heating, and specifically relates to a multi-ring electromagnetic heating circuit with a common driving signal. Background technique [0002] At present, in the field of electromagnetic heating, when faced with a certain heating unit that needs to output large power, the general method is to increase the parameters that the components in the resonance circuit can withstand; when simply increasing the component parameters cannot meet the power requirements, Will adopt double-loop or multi-loop heating method to satisfy. The double-loop or multi-loop heating method uses a drive signal processing circuit to control a resonance circuit. This method is not only costly, but the biggest drawback is that multiple resonant circuits require multiple control signals of multiple drive signal processing circuits to control, which results in the operating frequencies of multiple resonant circuits not be...

AI Technical Summary

Problems solved by technology

This method is not only costly, but also the biggest drawback is that multiple resonant circuits need multiple control signals from multiple drive signal processing circuits to control, which leads to the inconsistency of the operating frequencies of multiple resonant circuits. When the electric current acts on the heated pot at the same time, it will produce sharp and harsh noises, which are often unacceptable to users

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