Patent ID: 6426609
Filing Date: 2002-07-30
Classification: H02J,H02P,Y02T

Abstract:
A motor vehicle alternator driven by an engine, comprising:a field coil; an armature coil; a speed sensor portion for sensing a rotational speed of said engine according to a quantity of electricity operatively associated with the rotational speed of said engine; a rectifier for rectifying an alternating voltage generated by said armature coil to apply an output voltage to a battery and an electrical load; and a controller that sets a control voltage to a predetermined steady state control voltage to control a field current according to a difference between said control voltage and a battery voltage of said battery to allow said battery voltage to converge with said control voltage; wherein said controller sets said control voltage to an acceleration control voltage that is higher than said battery voltage by a predetermined voltage difference, said control voltage being higher than said battery voltage and less than said steady state control voltage during acceleration at low speeds when said rotational speed is equal to or less than a predetermined value and a rate of increase of said rotational speed is equal to or greater than a predetermined value.