Concentrated winding salient-pole shaded pole motors having mult

Details Concentrated winding salient-pole shaded pole motors having mult Concentrated winding salient-pole shaded pole motors having mult

1978-06-02

1980-11-18

Skudy, R.

Electrical generator or motor structure

Dynamoelectric

Rotary

H02K 1710

Patent

active

042348102

ABSTRACT:
Salient-pole shaded pole motors with multiple short circuited shading coils on each pole piece are disclosed wherein the pole pieces extend generally radially from the geometric center of the magnetizable yoke. The pole pieces are interconnected by a magnetic yoke that encompasses the pole pieces as well as a rotor. Adjacent pole tips of pole pieces are displaced in space from one another and are separated by air gaps. Among other things, this facilitates placement of concentrated winding means about the pole pieces. The leading edges or pole tips of the pole pieces exhibit a relatively high reluctance as compared to the center portion or region of the pole pieces. Also disclosed are methods of making multiple shading coil motors. Preferred forms include parallel disposed pairs of shading coils on each trailing pole tip which facilitates manufacture of motors. In addition, all of the coils are preferably made to be the same size in cross section to further facilitate manufacturability. The size of the shading coils are selected in terms of the total cross sectional area of the maximum size concentrated winding for a given pole.

REFERENCES:
patent: 2407754 (1949-04-01), Koch
patent: 2454589 (1949-11-01), Ballentine
patent: 2479329 (1949-08-01), Ellis
patent: 2773999 (1952-01-01), Morrill
patent: 2807735 (1957-09-01), Naul
patent: 2845553 (1958-07-01), Oldenkamp
patent: 2946941 (1960-07-01), Jin

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