US 4,599,552 A · Generator voltage regulator

Abstract

A voltage regulator circuit for a three phase AC generator includes an integrator circuit which integrates the voltage across each negative half cycle of generator output and compares it to a reference voltage to adjust the phase angle of an SCR circuit which provides the power to the exciter field of the generator. A bypass circuit is provided for bypassing the regulating circuit at low generator speeds, the bypass circuit including a FET which directly connects the anode and gate of the SCR in the exciter field power supply to directly apply the generator output voltage to the exciter field at low generator speeds and output voltage. A pair of transistors are latched as the output voltage reaches a preselected minimum value to de-energize the FET and enable the regulator circuit to take over control.

Claims19

Dependent claims

A voltage regulator for regulating the output voltage of an A-C generator, said generator having a field, the voltage regulator comprising:

means to produce a voltage to excite the field,
means to sense the A-C generator output voltage,
means to integrate one-half cycle of the A-C generator voltage output,
means to generate a reference voltage,
means to compare said integrated voltage with the reference voltage,
means to enable said comparator means at the end of the one-half cycle during which said integration means integrates the output voltage, and
means to regulate the field exciter voltage producing means in response to said voltage comparator means to thereby regulate the field strength and the generator output voltage.

4 more elements

Dependencies are inferred from the claim text.

Generator voltage regulator

Life of this patent

Generator voltage regulator

Life of this patent

Abstract

Claims19