Eddy currents
To all,
The method proposed here to curtail eddy currents in the core(s) is actually quite useless. The eddy currents induced in the core(s) will circulate in planes perpendicular to the axis of the coil and core. Putting a slice acting as an insulator in this same orientation does nothing to shorten eddy current paths, raise the resistance of those paths or otherwise inhibit eddies. Take a look at the orientation of laminations in a transformer or solenoid core. The sheets are perpendicular to the plane of the coil turns not parallel as his cuts are.
I doubt that eddy current loss is a make or break deal on a first proof prototype, so why not wind the coils on bobbins and slip all three on a single steel bar for a core? But then you're bound to follow your leader.
bi
Originally posted by marathonman
View Post
The method proposed here to curtail eddy currents in the core(s) is actually quite useless. The eddy currents induced in the core(s) will circulate in planes perpendicular to the axis of the coil and core. Putting a slice acting as an insulator in this same orientation does nothing to shorten eddy current paths, raise the resistance of those paths or otherwise inhibit eddies. Take a look at the orientation of laminations in a transformer or solenoid core. The sheets are perpendicular to the plane of the coil turns not parallel as his cuts are.
I doubt that eddy current loss is a make or break deal on a first proof prototype, so why not wind the coils on bobbins and slip all three on a single steel bar for a core? But then you're bound to follow your leader.
bi
Comment