Method, device, and system for regulating temperature of magnetron, variable-frequency power supply, and microwave apparatus

A controller, comprising:

• at least one processor;
• and
• a memory communicably connected to the at least one processor;
• wherein the memory stores instructions executable by the at least one processor, wherein the instructions, when being executed by the at least one processor, cause the at least one processor to perform:
• determining an anode current flowing through the magnetron or an input power of a variable-frequency power supply or an anode voltage applied to two ends of the magnetron, an output power of the variable-frequency power supply being configured to drive the magnetron to operate;
• determining an anode threshold voltage of the magnetron according to the anode current or the input power or the anode voltage, and
• calculating an anode temperature of the magnetron according to the anode threshold voltage of the magnetron;
• regulating the output power of the variable-frequency power supply according to the anode temperature of the magnetron, wherein the anode threshold voltage of the magnetron is a stabilized voltage of a Zener diode of an equivalent circuit model of the magnetron.

A microwave apparatus, comprising:

• a magnetron
• a variable-frequency power supply, comprising a variable-frequency circuit, wherein the variable-frequency circuit is configured to drive the magnetron;
• a voltage sampling circuit, configured to sample a output voltage of the variable-frequency circuit, the output voltage being in a corresponding relationship with an anode voltage applied to two ends of the magnetron;
• a controller, connected to an output terminal of the voltage sampling circuit and the variable-frequency power supply or the variable-frequency circuit respectively, wherein the controller comprises at least one processor;
• and
• a memory communicably connected to the at least one processor;
• wherein the memory stores instructions executable by the at least one processor, wherein the instructions, when being executed by the at least one processor, cause the at least one processor to perform:
• determining an anode current flowing through the magnetron or an input power of a variable-frequency power supply or an anode voltage applied to two ends of the magnetron, an output power of the variable-frequency power supply being configured to drive the magnetron to operate;
• determining an anode threshold voltage of the magnetron according to the anode current or the input power or the anode voltage, and regulating the output power of the variable-frequency power supply according to the anode threshold voltage of the magnetron, wherein the anode threshold voltage of the magnetron is a stabilized voltage of a Zener diode of an equivalent circuit model of the magnetron.