Brushless d.c. dynamoelectric machine with decreased...

Details Brushless d.c. dynamoelectric machine with decreased... Brushless d.c. dynamoelectric machine with decreased...

H - Electricity

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H02K 1/16 (2006.01) H02K 1/26 (2006.01) H02K 1/27 (2006.01) H02K 21/24 (2006.01) H02K 29/00 (2006.01)

Patent

CA 1271510

ABSTRACT OF THE DISCLOSURE A dynamoelectric machine which may operate in a motor mode or a generator mode is described wherein substantially the entire magnetic circuit is provided by ferrite material. In one particular embodiment, hard ferrite permanent magnet segments are mounted on a rotor plate while soft ferrite magnet segments with electrical coil windings mounted thereon are provided in a stator spaced apart from the rotor by an air gap. Other embodiments of the concept are described. Provision is made for decreasing mechanical vibration and audible noise by decreasing the magnitude of pulsations of air gap flux.

543665

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