Dynamo electric machine with upwardly shifted ripple frequency

Details Dynamo electric machine with upwardly shifted ripple frequency Dynamo electric machine with upwardly shifted ripple frequency

1982-06-17

1989-01-10

Skudy, R. M.

Electrical generator or motor structure

Dynamoelectric

Rotary

310254, H02K 2306

Patent

active

047975920

ABSTRACT:
A rotary electric dynamo machine in which the ripple component in the output occurs at a higher frequency. One half of the pole faces have a nonuniform airgap while the other half have a uniform air gap and cover a noninteger slot distance. The armature has an odd number of slots. Instead of the usual ripple component at the slot frequency, a dynamo constructed as described above, surprisingly, has a predominant ripple component at twice the slot frequency.

REFERENCES:
patent: 2374728 (1941-05-01), Bone
patent: 2456701 (1948-12-01), Hansen
patent: 2513226 (1950-06-01), Wylie
patent: 2717969 (1955-09-01), Buchhold
patent: 2835834 (1958-05-01), Steinegger
patent: 2978598 (1961-04-01), Kato
patent: 3064147 (1962-11-01), Porter
patent: 3296471 (1967-01-01), Cochardt
patent: 3488836 (1970-01-01), Wheeler
patent: 3567979 (1971-03-01), Jaffe

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