Electricity: single generator systems – Automatic control of generator or driving means – Voltage of generator or circuit supplied
Patent
1991-11-29
1993-07-06
Stephan, Steven L.
Electricity: single generator systems
Automatic control of generator or driving means
Voltage of generator or circuit supplied
322 22, H02J 714
Patent
active
052257649
ABSTRACT:
Regulator circuitry for connection to field coils of an alternator in an electrical system of a vehicle having a system voltage maintained by the alternator includes circuitry for providing a variable drive to the field coils of the alternator, and circuitry for generating a velocity signal related to a rotational velocity of a driven shaft of the alternator. The regulator circuitry also includes circuitry for producing a deviation signal when the system voltage deviates more than a predetermined amount from a predetermined value, and circuitry responsive to the deviation signal to vary the field coil drive to the alternator at a rate dependent upon the velocity signal. In addition a method is presented for regulating the voltage delivered by an alternator in an electrical system having a system voltage maintained by the alternator. The method includes the steps of determining when the system voltage deviates from a nominal value more than a predefined amount; and when the system voltage deviation occurs, varying a pulse width modulation signal to drive the field coils of the alternator at a rate that is related to a rotational velocity of a stator of the alternator.
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Bachand Richard A.
Jorgenson Lisa K.
Peckman Kristine
Robinson Richard K.
SGS-Thomson Microelectronics Inc.
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