Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1989-09-06
1991-07-09
Stephan, Steven L.
Electrical generator or motor structure
Dynamoelectric
Rotary
310 49R, 310 51, 310156, 310268, 310179, H02K 1100, H02K 3706, H02K 524, H02K 116
Patent
active
050308645
ABSTRACT:
An electrical multipole machine comprises a first machine section (1), a second machine section (3) and a machine shaft (5), about which one machine section is rotatable relative to the other machine section. The first machine section comprises an annular permanent-magnet body (11) having a plurality of adjacent pole pairs (N; S). The second machine section comprises a lamination assembly (25) having teeth (27-35) and coils (37-45). The teeth comprise tooth surfaces (47-55) which are geometrically spaced from one another by slots (57-65) and from the magnet body by an air gap (67). Near the air gap the slots extend in a tangential direction over at least 80 electrical degrees and at the most 90 electrical degrees, or over at least 130 electrical degrees and at the most 150 electrical degrees. The ratio between the number of poles and the number of teeth is either 4:3 or 2:3.
REFERENCES:
patent: 3860843 (1975-01-01), Kawasaki et al.
patent: 4280072 (1981-07-01), Gotou et al.
patent: 4626727 (1986-12-01), Janson
patent: 4730136 (1988-03-01), Muller
Janson Jan
Janssen Johannes H. H.
Van Hout Henricus M.
Van Steen Robertus I.
LaBalle C.
Stephan Steven L.
U. S. Philips Corporation
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