The working principle of the inverter

A, generating a square wave
CD4069 used here constitute a square-wave signal generator. R1 is the compensation resistor circuit, the oscillation frequency to improve due to the supply voltage changes caused by instability.solar controllersoscillator circuit is completed by the charge and discharge of the capacitor C1. The oscillation frequency f = 1/2.2RC. Maximum frequency circuit is shown: fmax = 1/2.2x103x2.2x10-6 = 62.6Hz, the minimum frequency fmin = 1/2.2x4.3x103x2.2x10-6 = 48.0Hz. Because of the error components, the actual value will be slightly different. Phase other unwanted hair, the other input terminal of the circuit to avoid the impact.
Square wave generating circuit
Second, the FET drive circuit.
Since the oscillation signal voltage output square wave signal generator is the maximum amplitude of 0 ~ 5V, the full drive power switching circuit used here TR1, TR2 of the oscillation signal voltage 220 volt power inverters amplified to 0 ~ 12V. As shown in Figure
FET drive circuit
Third, the power FET switching circuit
FET is the core of the device, the introduction of the basic principles of FET Refer dz3w Station Related Articles: How it works MOS FET introduction.