Development of snow-melting magnetic material wire for low current transmission line

Snow accumulation on transmission lines increases the conductor load. It may result in damage to transmission facilities due to abnormal load. As such, snow accumulation on transmission lines is one of the crucial problems. A method using the heat generated by the alternating magnetic field of a magnetic material wire has been developed and put into practical use. However, the method using conventional magnetic material can not gain sufficient calorific value to melt snow at some transmission lines through which only low current passes in the winter season. To solve these problems, we attempted to optimize alloy composition of Fe-Ni. In this research, we manufactured snow-melting wires varying Ni content and evaluated these magnetic characteristics and calorific value. In this result, magnetic characteristics and calorific value improved with increasing Ni content. A magnetic material optimized alloy composition showed calorific value of approximately 1.4 times as much as conventional magnetic material.