I have built an inverter circuit, where the circuit works properly for light AC loads e.g. 9 watts, 230V LED bulb etc. and gives an output voltage of 200v, but if I use a 70 watts, 230V exhaust fan as my load, it doesn't work and voltage across the load is found to be 30V. What is the problem and what should I do, to make it work properly for any load?
I have attached my schematic diagram: