Abstract
This paper describes the dc-bias characteristics of five magnetic materials used in a linear dc motor (LDM): three block materials−carbon steel (S45C), pure iron (SUYB1) and cast iron (FCD450), and two laminated materials− non-oriented silicon steel sheets (35H440) and oriented sili-con steel sheets (23ZH100). The following conclusions are reached: (1) When the dc bias Hdc is in the range from 1 to 5 kA/m, the electrical time constant Te of the five magnetic materials decreases. (2) In the same range, the incremental resistance ΔR of the block materials decreases, while ΔR of the laminated materials tends to increase. (3) 23ZH100 has the lowest values of Te and ΔR among the five magnetic materials.
