Three phase alternators

Details Three phase alternators Three phase alternators

1975-01-20

1976-04-27

Duggan, Donovan F.

Electrical generator or motor structure

Dynamoelectric

Rotary

310198, 310202, 310184, H02K 1920

Patent

active

039537536

ABSTRACT:
A three-phase alternator, particularly suited for automotive use, having three stator winding sections each including a given number of coils, with each coil encompassing two stator poles and separated from the next coil in the section by an unwound pole. The rotor poles are of tapered construction, each having an effective width of two stator poles. In a preferred "brushless" construction, a D.C. excitation coil encompasses a tubular center leg of a stationary magnetic core of E-shaped cross-sectional configuration, with flux of one polarity going to the rotor partly through a shaft journalled in the center leg of the core and through a radial air gap of substantial surface area, and flux of the opposite polarity going to the rotor through a large-area radial air gap adjacent the outer flange of the core.

REFERENCES:
patent: 888514 (1908-05-01), Lamme
patent: 3317765 (1967-05-01), Cone
patent: 3493800 (1970-02-01), Barrett

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