Inverter circuit two

It is a power frequency transistor inverter that can convert 12V DC power into 220V power frequency AC
power for use by incandescent lamps, with an output power of about 80W.
    An RC series frequency selection network is composed of potentiometer RPl. RPz and capacitors Cl and CZ. The frequency of the oscillator is - West to Ji.
Turn the switch SA to the "1" position, and the RC oscillator starts to work, sending out a sine wave signal with a frequency of 50H:.
The signal is amplified by the transistor, coupled by the transformer T, and outputs 220V, 50Hz AC power.
    When the transfer switch SA is in the "2" position, the battery
GB is charged by the mains power through the transformer T and the diodes VD4 and VDs. The rated current of VD4 and VDs is not less than 10A, and the withstand voltage is not less than 25V. The power of transformer T is 100W.