Patent ID: 7423351
Filing Date: 2008-09-09
Classification: H02J,H02P

Abstract:
1. A vehicle-generator control device for controlling an output voltage of a vehicle generator by on/off-controlling an excitation current flowing into an excitation winding of said vehicle generator, comprising: a first function of detecting said excitation current, a rotational speed of said vehicle generator, and an output voltage of said vehicle generator; a second function of calculating an output current and a power generation torque of said vehicle generator on the basis of said excitation current, said rotational speed of said vehicle generator, and said output voltage of said vehicle generator detected by said first function; a third function of limiting said excitation current to such a value that an increasing rate of said calculated power generation torque does not exceed a predetermined value; a fourth function of detecting a current flowing into an electrical load applied with said output voltage of said vehicle generator; and a fifth function of calculating, within a period during which an idle speed of said vehicle engine is stable, a correction coefficient of said excitation current on the basis of said output current of said vehicle generator and said current flowing into said electrical load, said second function being configured to correct said excitation current detected by said first function depending on said correction coefficient to improve calculation accuracy of said output current and said power generation torque of said vehicle generator.