Electricity: single generator systems – Automatic control of generator or driving means – Thermal conditions
Patent
1991-06-06
1993-03-30
Stephan, Steven L.
Electricity: single generator systems
Automatic control of generator or driving means
Thermal conditions
H02J 714
Patent
active
051987449
ABSTRACT:
A generator having an exciting winding and a standard load associated with a standard exciting current in the exciting winding can be controlled by a voltage regulator which adjusts an exciting current in the exciting winding and a temperature measurement device in a predetermined location in the generator and/or a voltage regulator associated with the generator, which is connected to the voltage regulator, advantageously via a microprocessor device or a pulse duration modulation circuit connected to the final regulating stage of the voltage regulator for gating the exciting current. So that the generator can be dimensioned to operate above its maximum rated temperature and can be operated in a superexcited state, the method of controlling the generator includes the steps of increasing the exciting current in the exciting winding beyond the standard exciting current to operate the generator at a higher load than the standard load; measuring a temperature T.sub.G at a predetermined location, advantageously in the generator, with the temperature measurement device; determining an allowed limiting temperature T.sub.GMAX at the predetermined location; lowering the exciting current, I.sub.Err, when the temperature T.sub.G is greater than the allowed limiting temperature T.sub.GMAX and maintaining the output power as high as possible without exceeding the allowed limiting temperature.
REFERENCES:
patent: 4470003 (1984-09-01), Mitchell
patent: 4563631 (1986-01-01), Mashino et al.
patent: 4659977 (1987-04-01), Kissel et al.
Kohl Walter
Meyer Friedhelm
Mittag Rainer
Schramm Guenter
Robert & Bosch GmbH
Stephan Steven L.
Striker Michael J.
To Ed
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