Patent ID: 6534990
Filing Date: 2003-03-18
Classification: H02J,Y02T

Abstract:
A control circuit configuration for waking up a voltage regulator in a vehicle electrical generator from a sleep mode to a normal operating mode in response to generator magnetic field rotation wherein a single phase of a three phase generator creates a voltage due to residual magnetism in the rotor, the control circuit configuration comprising:first filter means for eliminating high frequency noise in the voltage signal created in response to generator rotation providing a filtered signal; amplifier means for modifying the amplitude of the filtered signal; second filter means for eliminating the susceptibility of the signal to DC offset voltages; detection circuit means for establishing a triggering threshold for the twice filtered, amplified input voltage and determining an input waveform; and assessing means for assessing the input waveform and controlling voltage regulator transition from the sleep mode to the normal operating mode.