Electromagnetic devices

Details Electromagnetic devices Electromagnetic devices

H - Electricity

02

K

310/54

H02K 33/00 (2006.01) H01F 7/16 (2006.01)

Patent

CA 1061392

ABSTRACT OF THE DISCLOSURE An electromagnetic device comprises an outer annular member and an inner member, the two members each having a helical rib on their presented surfaces. Two presented side faces of the ribs define working surfaces and on one of the working surfaces is defined a groove which extends the length of the rib and the groove accommodates an electrical winding which when energised creates a pair of magnetic poles on the one working surface. The magnetic circuit of the poles includes the other working surface and the two surfaces move towards each other to reduce the mag- netic reluctance thereby causing relative movement of the members.

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