Electricity: single generator systems – Automatic control of generator or driving means – Voltage of generator or circuit supplied
Patent
1980-04-04
1983-05-31
Hickey, R. J.
Electricity: single generator systems
Automatic control of generator or driving means
Voltage of generator or circuit supplied
322 73, 320 64, H02J 714
Patent
active
043863108
ABSTRACT:
A regulated automotive alternator battery charging system is disclosed. The system comprises an engine-powered alternator which provides a rectified alternator output signal for charging an automobile battery in accordance with an alternator field coil excitation signal provided by a voltage regulator which senses the battery voltage and alters the field coil excitation in response thereto to maintain the battery in a charged condition. The voltage regulator comprises an oscillator for developing a constant frequency signal which is independent of engine speed and battery load. The regulator includes circuitry for varying the duty cycle of this constant frequency signal in accordance with the sensed magnitude of battery voltage, and the constant frequency but variable duty cycle signal is utilized to provide field coil excitation for the alternator wherein the system maintains the battery voltage at a substantially constant magnitude.
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Gillman James W.
Hickey R. J.
Melamed Phillip H.
Motorola Inc.
Pristelski James S.
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