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Re: Heating in 4-1/2 turn inductorFrom: amdx@knology.net (amdx) "whit3rd" <whit3rd@gmail.com> wrote in message news:69863d94-450f-49b5-bdc0-4428e4f21c20@h19g2000yqb.googlegroups.com... On Aug 27, 10:31 am, "Jeff Johnson" <Jeff_John...@Hotmail.com> wrote: The theory of ideal inductors does not give any reason why a 1/2 turn Oh, yes, it DOES give a reason. A pot core (or E cores) has a pair of That means the 3-d flux inside the core is very different in the Some may find interest in this. A turn around an outside leg of an E-core is called a half-turn because it encloses only one-half of the cross-sectional area of a turn around the center leg. It is well known that a half-turn in a secondary winding of a power transformer greatly increases the leakage inductance between windings, thus causing an adverse effect on cross-regulation. However, the increased leakage inductance of a half-turn can be very beneficial in tapped inductors for boost circuits and in coupled output chokes. This paper explains some of these little-known applications of a half-turn. The theory and formulae for prediction of leakage inductance added by such a half-turn are presented
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