Electricity: single generator systems – Generator control – With excitation winding and/or circuit control
Patent
1998-06-12
1999-11-16
Ramirez, Nestor
Electricity: single generator systems
Generator control
With excitation winding and/or circuit control
322 18, 322 36, H02H 706, H02P 910
Patent
active
059864397
ABSTRACT:
A method of regulating voltage output from an alternator of a vehicle charging system is provided in response to transient alternator loads during idle speed operating conditions. The method comprises the steps of: (a) delivering a first alternator field control signal to the alternator; (b) detecting an impulse electrical load based on a variation in battery voltage; and (c) gradually increasing the alternator field control signal duty-cycle over a time period, such that the time period is based on the magnitude of the alternator field control signal duty-cycle, with respect to a maximum alternator field control signal duty-cycle, and based on the engine rotational speed of the vehicle, thereby regulating voltage output and torque load of the alternator. More specifically, the variation in battery voltage is the difference between a measured battery voltage and an average delta battery voltage, where the average delta battery voltage is indicative of the change in battery voltage over a period in time, and the duty-cycle of the alternator field control signal is incremented by a predefined amount until it reaches a maximum value or until a calculated average battery voltage is substantially equal to a predefined voltage regulator set point value. In addition, the first alternator field control signal is delayed for a preliminary period after the step of detecting a variation in battery voltage to minimize battery voltage drop.
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Adams Joseph B.
Boggess Michael S.
Pletta Keith B.
Tallarek Glen E.
Calcaterra Mark P.
Chrysler Corporation
Medley Peter
Ramirez Nestor
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