AN ELECTRIC MACHINE

WIPO Patent Application WO1998025330

A3

PCT No. PCT/SE97/02026 Sec. 371 Date Jun. 2, 1999 Sec. 102(e) Date Jun. 2, 1999 PCT Filed Dec. 4, 1997 PCT Pub. No. WO98/25330 PCT Pub. Date Jun. 11, 1998An electric machine comprising a ferromagnetic first part (11) having a plurality of teeth (11C) arranged in a row, a ferromagnetic second part (12) having a plurality of poles (16, 17) arranged in a pole row confronting the row of teeth (11C) of the first part (11) and spaced from the row of teeth by an air gap (18), bearing means supporting the first and second parts (11, 12) for relative movement along the air gap (18), and winding means (15) associated with the first part (11) for producing a multipolar magnetic field continuously travelling along the air gap and linking the first and second parts (11, 12) across the air gap (18). The travelling magnetic field has an even number of poles and a pole pitch corresponding to the pole pitch of the second part (12). At least a section of at least some poles of the pole row of the second part (12) constitutes a soft-magnetic salient pole (17) which has over at least part of its length along the air gap (18) a saturation flux density at the surface thereof facing the air gap which is no higher than the flux density in the air gap which causes magnetic saturation of the teeth (11C) of the row of teeth of the first part (11).

WO/1997/008809	MOTOR WITH MOTOR PARTS WHICH ARE MOVABLE RELATIVE TO ONE ANOTHER
JP2012016127	MOTOR

TOEROEK VILMOS (IT)

PCT/SE1997/002026

August 20, 1998

December 04, 1997

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TOEROEK VILMOS (IT)

H02K1/08; H02K1/24; H02K19/10; H02K21/12; H02K21/14; H02K; (IPC1-7): H02K1/08

US3956678A	1976-05-11
US3171049A	1965-02-23
US4661736A	1987-04-28
US4260926A	1981-04-07
US4517483A	1985-05-14

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