Electricity: single generator systems – Automatic control of generator or driving means – Voltage of generator or circuit supplied
Patent
1996-12-27
1998-02-17
Dougherty, Thomas W.
Electricity: single generator systems
Automatic control of generator or driving means
Voltage of generator or circuit supplied
322 36, 322 99, H02J 714
Patent
active
057194882
ABSTRACT:
The object of the invention is to provide a charging generator 1 which can avoid occurrence of overvoltage due to failure of equipment, which comprises: an a.c. generator 10 having armature windings 10a, 10b, 10c and a field winding 10d for generating an a.c.; a rectifier 11 having a plurality of power zener diodes 11a-11f having an intrinsic breakdown voltage Vz for converting the a.c. output from the armature windings to a d.c.; a current inhibit means which receives the d.c. output from the rectifier via field winding 10d and inhibits a field current which flows through the field winding; a voltage detection means for detecting a voltage of the d.c. output from the rectifier; and a voltage regulator 13, which includes a protection control means for controlling the current inhibit means in accordance with a result of judgment which is larger between a detected value of the d.c. voltage and a predetermined protection cut-off voltage VB, for regulating the d.c. voltage in the vicinity of the protection cut-off voltage VB by inhibiting the field current, and wherein the relationship between breakdown voltage Vz and protection cut-off voltage is set Vz>VB.
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Hikita Sakae
Maeda Yuji
Mashino Keiichi
Dougherty Thomas W.
Hitachi , Ltd.
Hitachi Car Engineering Co. Ltd.
Ponomarenko Nicholas
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