Driving Circuit For Magnetron, And Heating Device

A driving circuit for a magnetron, comprising:

• a rectification circuit, wherein a first output terminal of the rectification circuit is configured to be connected to an anode of the magnetron, a second output terminal of the rectification circuit is configured to be connected to a ground terminal of the magnetron, and the rectification circuit is configured to convert an AC (alternating current) into a DC (direct current) to supply power to the magnetron;
• a transformer, wherein a primary coil of the transformer is configured to be connected to an alternating current power supply terminal or an inverter circuit, a first terminal of a first secondary coil of the transformer is configured to be connected to a cathode of the magnetron, a second terminal of the first secondary coil of the transformer is configured to be connected to the anode of the magnetron, a second secondary coil of the transformer is connected to the rectification circuit, and the transformer is configured to provide an AC for the rectification circuit;
• and
• a component having a variable resistance value, wherein the component is in a circuit path formed by the first secondary coil, the anode of the magnetron, and the cathode of the magnetron, and configured to limit a current flowing through the magnetron,
• wherein a resistance value of the component is positively correlated with a temperature of the component.