Electromagnetic induction heating control circuit and electromagnetic induction heating equipment

摘要

The present invention discloses an electromagnetic induction heating control circuit, which includes a control chip, a rectifying filter circuit, a resonance capacitor, a switching transistor, a drive circuit, and a synchronous voltage detection circuit. The switching transistor includes a first end, a second end, and a control end. The first end is connected to the output terminal on the positive side of the rectifying filter circuit via the resonance capacitor, and the second end is a current limiting element. The control chip is connected to the negative output terminal of the rectifying filter circuit through a resistor, and the control chip includes a positive phase voltage input terminal, a negative phase voltage input terminal, a voltage detection terminal, and a signal input terminal. The input terminal and the negative-phase voltage input terminal detect the voltage at both ends of the resonance capacitor by the synchronous voltage detection circuit, the signal output terminal is connected to the control terminal via the drive circuit, and the voltage detection terminal is the synchronous voltage detection circuit. Rectifier filter through Is connected to the positive side of the output end of the road, the control chip, based on the voltage detected by the voltage end detection end, controls the operation state of the switching transistor. The present invention further discloses an electromagnetic induction heating facility. [Selection] Figure 1