| Abstract Scope |
In this work we show that these CNT composites may have advantages for high frequency motors, and in particular that the composite anisotropy trades off with overall composite conductivity for optimal properties. We considered a carbon nanotube and its associated yarn as an anisotropic conductivity material. The fibers were assumed to be aligned, with pitch Lp. If we choose, for example, sigma-cnt = 8 MS/m, sigmaz,f = 0.8 MS/m, and sigmay-y = 0.008 MS/m, we find that at 100 Hz, the loss is 0.5 mW/cm3 for such a composite, for an applied Bmax of 0.5 T. This present result can be compared to that of a standard Litz wire. Assuming the smallest wire in the Litz is similar to the yarn size here , the losses in this composite are lower than those of the Litz by the anisotropy of the CNT yarn, here taken to be 10 X. |