Battery charger/pre-exciter for engine-driven generator

Details Battery charger/pre-exciter for engine-driven generator Battery charger/pre-exciter for engine-driven generator

1993-08-18

1996-07-16

Stephan, Steven L.

Electricity: single generator systems

Generator control

Combined permanent magnet and wound field structure

310181, H02P 914

Patent

active

055370250

ABSTRACT:
An engine-driven generator having a battery powered starter motor includes a permanent magnet battery charger/pre-exciter for charging the starting battery and for exciting the main alternator field winding of an AC synchronous alternator included in the engine-driven generator. A first winding in the permanent magnet battery charger/pre-exciter provides power to a first voltage regulator that, in turn, maintains a desired load voltage substantially independently of alternator loading. A second winding within the permanent magnet battery charger/pre-exciter supplies power to a second voltage regulator that maintains a desired battery charging voltage substantially independently of the alternator loading. Use of the permanent magnet battery charger/pre-exciter maintains a desired battery charge current and a desired main alternator field excitation substantially independently of the load current supplied by the alternator.

REFERENCES:
patent: 3863137 (1975-01-01), Mishima et al.
patent: 4146831 (1979-03-01), Farr
patent: 4217538 (1980-08-01), Ziemacki
patent: 4467267 (1984-08-01), Hucker et al.
patent: 4701692 (1987-10-01), Takeuchi et al.
patent: 4772802 (1988-09-01), Glennon et al.
patent: 4841216 (1989-07-01), Okada et al.
patent: 5397975 (1995-03-01), Syverson

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