Magnetization Loss Measurements of Spiral Copper-Plated Multifilament Coated Conductors With Various Filament and Conductor Widths

We can achieve both small magnetization loss and the robustness against local defect or local normal transition by winding copper-plated multifilament coated conductor spirally. The particular focus of this study is the impact of narrowing conductor (tape) width as well as filament width on magnetization losses. We measured the magnetization losses of various spiral copper-plated multifilament coated conductors, separated them into hysteresis losses and coupling losses, and examined the impact of narrowing filament width and conductor width. We demonstrated that the magnetization loss of the spiral 2 mm-wide coated conductor with 0.2 mm-wide filaments and 10 μm-thick copper was one-twentieth of that of a flat standard 4 mm-wide coated conductor in transverse ac magnetic fields of 65.44 Hz.