Induction Heating Coil Design: Rectangular vs. Spiral Shape

[Davide Fabri]

Goodmornig everybody,
I'm working on the design of a power converter for high frequency induction heating. The induction coil should be a flat spiral (pancake) with a rectangular shape, but my customer would like to design it as shown in the following picture. I think it will not work because that way magnetic field lines are canceled. What do you think ?
Thank you.
Davide

 

[berkeman]

Goodmornig everybody,
I'm working on the design of a power converter for high frequency induction heating. The induction coil should be a flat spiral (pancake) with a rectangular shape, but my customer would like to design it as shown in the following picture. I think it will not work because that way magnetic field lines are canceled. What do you think ?
Thank you.
Davide

Welcome to the PF.

Your thoughts are correct. That will not
work. It needs to be a 3-D coil, or at least a 2-D coil.