Magnetron driving power source, control method thereof and microwave cooking equipment

The invention discloses a magnetron driving power source, a control method thereof and microwave cooking equipment. The magnetron driving power source includes a frequency conversion circuit and a rectification filtering circuit. The frequency conversion circuit includes a transformer and a switching device. The transformer includes a primary coil. The frequency conversion circuit provides on-offsignals to the primary coil through the switching device. The control method includes: obtaining voltage of an alternating-current power source; judging whether the voltage of the alternating-currentpower source is lower than a set value; shortening turn-on of the switching device on the on-off signals in a case where the voltage of the alternating-current power source is lower than the set value; and keeping the turn-on time of the switching device on the on-off signals constant in a case where the voltage of the alternating-current power source is not lower than the set value. The above magnetron driving power sourc