Self-excited alternator

Details Self-excited alternator Self-excited alternator

1985-01-25

1986-12-30

Perkey, William B.

Electricity: single generator systems

Automatic control of generator or driving means

Power factor or phase relationships

322 63, 322 64, 322 66, 322 28, H02P 910

Patent

active

046331603

ABSTRACT:
A self-excited brushless alternator having a rotating field excited by an alternating current exciter whose armature rotates with the field winding of the alternator and is permanently connected to that winding by a rotating field rectifier. To obtain reliable regulation over a wind range of load and power factors, at least one exciter stator primary winding is magnetically coupled to at least one exciter rotator secondary winding which is connected by the rectifier to the main field. Primary excitation direct current for the exciter is derived by a magnetic coupling from a rotary auxiliary magnetic field produced by a feedback winding connected in series with the main field winding and rotating therewith. Preferably, current paths for the exciter primary excitation are different during and after build-up.

REFERENCES:
patent: 3189814 (1965-06-01), Rosenberry et al.
patent: 3374423 (1968-03-01), Hemmenway
patent: 3534228 (1970-10-01), Hyvarinen et al.
patent: 3713016 (1973-01-01), Lehnhoff
patent: 3758843 (1973-09-01), Ishizaki et al.
patent: 3863137 (1975-01-01), Mishima et al.
patent: 4383215 (1983-05-01), Frister
patent: 4442396 (1984-04-01), Huckes

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