I have seen many using U-T core laminations which have about 72% yield during punching. This results in more utilization of steel and also results in higher carbon foot print as a conseqeunce. Here is some sugegstion for improving punching yield. Hope it benefits someone and hope teh world as whole has smaller carbon emmissions.
ADVANTAGES OF J-I OR L-U DESIGN
- 100% yield
- Lesser steel consumption and smaller carbon foot print.
- Smaller window has smaller average perimeter and hence lesser wire length, lesser wire resistance and lower wire losses.
- Smaller window and hence suitable for copper wire too.
- Simpler stamping pattern.
- Simpler assembly effort on shop.
- Can have near cubic dimension. Current design is always 6a x 4a. But with new design it will be 6a wide x any height (=x + 2a).
- Winding window = can be any size (=x) x a.
- Hence bigger winding window can also mean higher turns, lesser steel and lower costs.
- Near cubic shape results in optimal combination for least overall losses = wire loss + steel loss.
100% Yield with lamination punching for electromagnetic chokes
