Synchronous electric power generating apparatus and magnetizatio

Details Synchronous electric power generating apparatus and magnetizatio Synchronous electric power generating apparatus and magnetizatio

1996-04-04

1998-03-10

Dougherty, Thomas M.

Electricity: single generator systems

Automatic control of generator or driving means

Thermal conditions

322 28, 322 20, H02P 900

Patent

active

057265593

ABSTRACT:
In order to restrain increase in rotor temperature and reduction in field magnetic flux in an AC power generator, advanced-phase currents are supplied to stator windings of a stator via semiconductor switching devices by controlling the semiconductor switching devices during the power generating operation of the power generator. By this control, the advanced-phase currents will increase the field magnetic flux and, accordingly, increases in generated voltage. By reducing a field current to a field winding of a rotor by an amount corresponding to the increase in the power generation output, the temperature increase in the field winding can be reduced.

REFERENCES:
patent: 5177677 (1993-01-01), Nakata et al.
patent: 5543703 (1996-08-01), Kusase et al.
patent: 5550456 (1996-08-01), Shekhawat et al.
patent: 5550457 (1996-08-01), Kusase et al.
patent: 5561363 (1996-10-01), Mashino et al.
patent: 5581172 (1996-12-01), Iwatani et al.

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