AC loss

A close relationship exists between the flux-jump stability of a multifilamentary conductor and its hysteretic lossiness in an applied AC field. The introductory part of this chapter discusses the AC loss model of Wilson. It is then demonstrated that the coupling-enhancement effect was the contribution that eddy currents crossing the normal matrix between the filaments made to the total loss. A brief discussion is offered of the philosophy that guides the choice of monolith, cable, or braid, for a given application. An overview is given of the Carr anisotropic-continuum model for AC loss in an open-circuited wire exposed to a transverse applied field with reference to other experimental results. The chapter concludes with a brief review of AC losses associated with various combinations of field and current conditions