Jul 6, 2012 #1 E Embedded_Geek Full Member level 6 Joined Jul 5, 2010 Messages 340 Helped 58 Reputation 116 Reaction score 56 Trophy points 1,318 Location Germany Activity points 2,948 Could anyone please explain how the air gap in the flyback transformer really effects the primary winding inductance. I am basically looking for the mathematical relation... Thanks in advance, Embedded_Geek
Could anyone please explain how the air gap in the flyback transformer really effects the primary winding inductance. I am basically looking for the mathematical relation... Thanks in advance, Embedded_Geek
Jul 6, 2012 #2 FvM Super Moderator Staff member Joined Jan 22, 2008 Messages 52,423 Helped 14,752 Reputation 29,786 Reaction score 14,101 Trophy points 1,393 Location Bochum, Germany Activity points 298,112 Calculating the reluctance of the magnetic circuit is a visual method to find the inductance. https://en.wikipedia.org/wiki/Magnetic_circuit I guess you know about AL factors of magnetic cores. According to the reluctance model, you can assume 1/ALgapped = 1/ALungapped + k*sg (sg is the gap width, k a constant) Due to fringing fields, the calculation isn't exact for very large air gaps.
Calculating the reluctance of the magnetic circuit is a visual method to find the inductance. https://en.wikipedia.org/wiki/Magnetic_circuit I guess you know about AL factors of magnetic cores. According to the reluctance model, you can assume 1/ALgapped = 1/ALungapped + k*sg (sg is the gap width, k a constant) Due to fringing fields, the calculation isn't exact for very large air gaps.