High power density brushless dc motor

Details High power density brushless dc motor High power density brushless dc motor

H - Electricity

02

K

310/68

H02K 7/20 (2006.01)

Patent

CA 1109915

ABSTRACT OF THE DISCLOSURE A multiple disk, pancake, self-fed brush less dc motor characterized by high power density has a variable number of interleaved, axially spaced annular rotor disks and annular stator disks. The annular rotor disks are made of high coercive force permanent magnets such as cobalt-samarium and fer- rites which do not demagnetize easily. Each annular stator disk is yokeless and consists of a laminated magnetic core made of spirally wound metal strip, with opposing sets of stator slots and windings on both sides of the core. The permanent magnet machine can be operated as a generator. The Supplementary Disclosure describes a preferred embodiment of the machine in which the metal strip of the stator disks is low-loss magnetic amorphous metal ribbon.

299981

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