Unidirectional self-starting electrical motors with shaded poles

Details Unidirectional self-starting electrical motors with shaded poles Unidirectional self-starting electrical motors with shaded poles

1974-04-24

1977-03-15

Skudy, R.

Electrical generator or motor structure

Dynamoelectric

Rotary

318138, H02K 1900

Patent

active

040126528

ABSTRACT:
A unidirectional self-starting synchronous motor comprises a stator having pole teeth of alternating polarity some of which are shaded to provide shaded pole groups alternating with unshaded pole groups. The shaded groups are angularly displaced from a symmetrical position. The total number of effective poles equals the theoretical synchronous number and these are poles divided substantially evenly between the groups. In one case, a shaded shunt is provided as an addition to the shaded groups and a rotor is provided from radially-polarized, anisotropic, ferrite.

REFERENCES:
patent: 1959391 (1934-05-01), Spencer
patent: 2695370 (1954-11-01), Brouwer
patent: 2703862 (1955-03-01), Gordon
patent: 2803765 (1957-08-01), Timmerman
patent: 2951957 (1960-09-01), Eigeman
patent: 2981855 (1961-04-01), Van Lieshout
patent: 3502921 (1970-03-01), Suzuki

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