ABSTRACT
The design of an AC inductor is quite similar to that of a transformer. Although most inductors are designed for a given temperature rise, they can also be designed for a given regulation. The regulation and volt-amp ability of a core is related to two constants. The design of a linear ac inductor depends upon five related factors: desired inductance, applied voltage, frequency, operating flux density and temperature rise. The core material selected determines the maximum flux density that can be tolerated for a given design. Final determination of the air gap requires consideration of the effect of fringing flux, which is a function of gap dimension, the shape of the pole faces, and the shape, size, and location of the winding. The problem in designing high frequency inductors is the required turns to support the applied voltage, then gapping to provide the proper inductance. This problem is minimized when using powder cores if the right permeability can be found.
