Magnetron drive circuit and cooking equipment

CN116193660BActive Publication Date: 2026-06-30GUANGDONG WITOL VACUUM ELECTRONICS MFR +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
GUANGDONG WITOL VACUUM ELECTRONICS MFR
Filing Date
2023-02-21
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

When the magnetron is working, the filament heats up too much due to continuous power supply, which accelerates material evaporation and affects its service life and stability.

Method used

Design a magnetron drive circuit, including a resonant circuit, a voltage doubler rectifier circuit, and a switching circuit. The switching circuit controls the on/off of the filament power supply, and utilizes the secondary electron backflushing characteristic of the filament to maintain high-temperature electron emission. Combined with an auxiliary power supply circuit and a delay circuit, it ensures that the filament does not continuously heat up.

Benefits of technology

This reduces the evaporation rate of the filament material, extends the lifespan of the magnetron, and improves the reliability and response speed of the drive circuit.

✦ Generated by Eureka AI based on patent content.

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Abstract

This invention provides a magnetron drive circuit and a cooking device. The magnetron drive circuit includes: a resonant circuit comprising a transformer having a primary coil and a secondary coil, the first end of the primary coil being connected to the cathode of the magnetron, and the second end of the primary coil being connected to the anode of the magnetron; a switching circuit connected in series between the first end of the primary coil and the cathode of the magnetron, and / or connected in series between the second end of the primary coil and the anode of the magnetron, for controlling the on / off state between the primary coil and the magnetron; and a voltage doubler rectifier circuit, the input terminal of which is connected to the secondary coil, the first output terminal of which is grounded, and the second output terminal of which is connected to the anode of the magnetron.
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