Microwave oven having generator power supply

A microwave oven comprising:

• a door movable between an open state and a closed state;
• a microwave generator for generating microwaves;
• and
• a generator power supply unit comprising the following components ordered from upstream to downstream:
• a first converter for converting a power input to a power output;
• a first energy reserve electrically coupled to the first converter for receiving the power output;
• a second converter electrically coupled to the first energy reserve for converting the power output to a low voltage power output;
• and
• a second energy reserve located downstream from the first energy reserve and electrically coupled to the second converter for receiving the low voltage power output and supplying the low voltage power output to the microwave generator;
• and
• a detection circuit configured to detect an input voltage and disable the second converter when the input voltage is less than a threshold voltage as a result of the door being in the open state, wherein disabling the second converter triggers the second energy reserve to discharge, and wherein the time necessary to discharge the second energy reserve is independent of the detected input voltage.