Mosfet 2N7002 Blocking Oscillator Forward Converter

Trying to make a simple Mosfet blocking Oscillator that act as cheap forward converter. The circuit works, but it is energy inefficient, only about 50%. 2N7002 Model is tailored according to 2N7002 that I have with me by measuring current Id with respect to varying Vgs, the K, W, L of mosfet is tuned to match voltage current characteristic measured. Drain voltage appear quite high without sufficient loading capacitor. Incoming inductor which parallel with a switch seems helps on improving efficiency(50%->67%). I acknowledge this circuit is a variant for Royer oscillator. I choose this design just because of less winding needed and no additional controller needed. Please advice is exist a much better design. https://www.smps.us/inverters.html https://electronics.stackexchange.com/questions/281262/royer-oscillator-circuit https://www.zackwhitlock.com/post/building-a-royer-oscillator https://electronics.stackexchange.com/questions/175170/understanding-royer-oscillator-for-wireless-power-transfer-specially-mosfet https://www.eeweb.com/isolated-dc-dc-converter/ https://threeneurons.wordpress.com/miscellaneous-projects/ https://www.edaboard.com/threads/designing-a-simple-isolated-dc-dc-converter.382971/

published 1 year ago