Electricity: single generator systems – Automatic control of generator or driving means – Voltage of generator or circuit supplied
Patent
1985-09-12
1987-01-13
Hickey, R. J.
Electricity: single generator systems
Automatic control of generator or driving means
Voltage of generator or circuit supplied
320 21, 322 29, 322 73, H02J 714
Patent
active
046367063
ABSTRACT:
A voltage regulator for regulating the output voltage of a diode-rectified alternating current generator that supplies the electrical loads on a motor vehicle including the storage battery. The voltage regulator has an up-down counter which is incremented when the output voltage of the generator is below a desired regulated value and is decremented when the output voltage of the generator is above the desired regulating value. The magnitude of the count in the counter is repeatedly sampled and used to determine the on time of a semiconductor switch that is connected in series with the field winding to thereby control the duty cycle of the field voltage pulses. The counter is incremented at a lower rate when the speed of the engine that drives the generator is below a predetermined speed than it is when the speed of the engine is above the predetermined speed. When the generator is not rotating, the up-count of the counter is limited to a predetermined value that provides a minimum field voltage duty cycle. The system is capable of sensing either battery voltage or rectifier output voltage and is controlled to automatically switch between battery voltage and rectifier voltage under certain operating conditions.
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Bowman William E.
Kirk Thomas E.
Voss Richard J.
General Motors Corporation
Hickey R. J.
Meland C. R.
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