| 摘要 |
PURPOSE:To reduce the step pitch by setting the arraying interval of poles and adjacent pole interval between field legs to the prescribed relationship. CONSTITUTION:Many teeth 20a are, for example, formed to form the high and low magnetic resistance distributions at the prescribed pitch L on a log magnetic material traveling member 20. Field legs 23, 24 are secured to both ends of a permanent magnet 22 formed as bias magnetic path leg for generating a bias magnetic flux. The legs 23, 24 have n pieces of poles 23a-23e, 24a-24e respectively having exciting coils 26a-26e, 27a-27e, and the arraying interval of the poles is set to [(1/2n)+N]L. The interval of the adjacent poles between both field legs is set to [(M/2)+(1/2n)]L, where N and n are integer numbers, and M is 2 or more integer number,. |
