The role of high voltage capacitors in microwave ovens

Capacitors in different circuits play different roles. Microwave ovens are one of the most common electrical products in our lives. High-voltage capacitors are our indispensable electronic components. What role does high-voltage capacitors play in microwave oven circuits? Let's have a look!

The role of the high voltage capacitor is as follows:

Double voltage: A high-voltage capacitor and a high-voltage diode form a half-wave voltage doubler rectifier circuit. The high voltage transformer output 2100V AC voltage can be used to obtain the 4200V DC voltage required for the magnetron anode after half-wave voltage doubler rectification. It can also reduce the weight and reduce the volume of the high voltage transformer.

Energy-saving: The capacitor used in the microwave oven is not a common transformer capacitor, but a high-voltage transformer with "magnetic leakage" characteristics. The principle of "magnetic leakage" is used to achieve the purpose of giving the magnetron filament voltage to the microwave oven and the anode voltage to be automatically regulated. Due to the influence of the phase lag of the leakage inductance voltage, the utilization efficiency of the microwave oven is reduced, and the reactance characteristic of the high voltage capacitor is exactly opposite to the leakage inductance voltage characteristic, the current phase is advanced, and the leakage current of the phase lag is good. The compensation function is believed to increase the power factor of the microwave oven to over 95%.