High power density brushless dc motor

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

1978-05-30

1980-02-05

Duggan, Donovan F.

Electrical generator or motor structure

Dynamoelectric

Rotary

310126, 310268, H02K 720

Patent

active

041874412

ABSTRACT:
A multiple disk, pancake, self-fed brushless dc motor characterized by high power density has a variable number of interleaved, axially spaced rotor and stator disks. The annular rotor disks are made of high coercive force permanent magnets such as cobalt-samarium and ferrites which do not demagnetize easily. The annular stator disks are yokeless and include a spirally wound laminated magnetic core made of steel strip or amorphous metal ribbon with opposing sets of stator slots and windings on both sides of the core. The permanent magnet machine can be operated as a generator.

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"Potential of Amorphous Alloys For Application in Magnetic Devices", Loborsky et al., J. Appl. Physics, 3/78, pp. 1769-1774.

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