Reducing losses in foil wound air-cored inductors

Utilisation of wire wound and ferrite cored inductors can be an expensive addition to the cost of a finished product. The potential advantages of using air-cored foil wound aluminium inductors has been the focus of attention for many papers written over the last few decades. In this paper the losses associated with foil wound inductors in the frequency range 20 Hz to 4 MHz have been studied. Extensive testing has yielded useful results allowing a set of design rules to be formulated which will enable the design of devices with reduced losses