Magnetic cores of rotary electrical machines

Details Magnetic cores of rotary electrical machines Magnetic cores of rotary electrical machines

F - Mech Eng,Light,Heat,Weapons

16

C

F16C 39/06 (2006.01) H02K 7/09 (2006.01)

Patent

CA 2081326

- 15 - MAGNETIC CORES OF ROTARY ELECTRICAL MACHINES ABSTRACT OF THE DISCLOSURE A rotary electrical machine comprises a rotor assembly and a stator assembly separated by an air gap. One of the assemblies is formed from discrete generally pie-shaped pole pieces having a progressively increasing radial slot to accomodate winding of the coil. The pole pieces are preferably wound from a grain oriented ferromagnetic tape to improve the permeability of the pole and its saturation level. In an alternative embodiment, at least some of the pole pieces are formed from both a permanent magnet and ferromagnetic tape to provide a constant bias between the rotor and stator assemblies. The invention is particularly well suited for use in a magnetic bearing. SC/SP-PCT.008

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