Magnetron power supply device used in microwave oven

Abstract

The invention belongs to the electrical equipment technology field and relates to a magnetron power supply device used in a microwave oven. An inductor and a capacitor are electrically connected so as to form an LC filter circuit. A current transformer is electrically connected to the LC filter circuit and a voltage detection circuit respectively. An original edge transmitting coil, a secondary edge receiving coil, an original edge compensation capacitor, a secondary edge compensation capacitor and a pick-up coil are electrically connected so as to form a resonance coupling network. A single chip microcomputer control circuit is connected to an auxiliary power supply, a comparison conditioning circuit, a given power control panel and a driving circuit in an electrical information mode respectively. An input terminal of a rectifier bridge is connected to a 220V alternating current input power supply. An output terminal of the rectifier bridge butts the LC filter circuit so as to form an input power supply unit. An input terminal of a voltage doubling rectifying circuit is electrically connected to the resonance coupling network. An output terminal of the voltage doubling rectifying circuit is connected to a magnetron in parallel so as to form the magnetron power supply apparatus. A main body circuit structure is novel, a principle is simple and reliable, output power is large, manufacturing cost is low, a service life is long, a market prospect is good and an application environment is friendly.

Description

Technical field: [0001] The invention belongs to the technical field of electrical equipment, and relates to a power supply topology for a magnetron power supply of a microwave oven and a power transmission control method thereof, in particular to a magnetron for a microwave oven with a single switching tube and bipolar inverter power transmission power supply unit. Background technique: [0002] At present, the traditional power supply for microwave ovens is mostly power frequency step-up power supply, which adopts power frequency transformer to boost high-voltage power to supply power to the magnetron. The pollution is serious, and the output voltage of the traditional microwave power supply cannot be adjusted, and the power can only be adjusted by changing the intermittent working time of the power supply; the intermittent power supply mode adopted by the power supply will not only affect the service life of the magnetron, but also make the cooking effect of the food Gre...

AI Technical Summary

Problems solved by technology

Now commonly used resonant converters include series resonant converters, parallel resonant converters, series-parallel resonant converters and relatively new LLC resonant converters. The above-mentioned converters are based on full-bridge or half-bridge inverter topologies. It can only be realized, and its circuit structure is relatively complex, the volume is relatively large, the cost is high, the reliability is low, and the control is troublesome.

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