Patent ID: 7038428
Filing Date: 2006-05-02
Classification: H02P

Abstract:
1. A control apparatus for controlling an automotive generator, said control apparatus comprising: a field coil to which a DC output voltage of the automotive generator is supplied; a switching device connected in series with said field coil, whereby switching on/off action of said switching device controls a field current flowing through said field coil; a diode connected in parallel with said field coil for recirculating the field current flowing through said field coil when said switching device is in an OFF state; a voltage control circuit for outputting an ON/OFF drive signal to said switching device such that the DC output voltage of the automotive generator follows a specific reference voltage by PWM control operation performed at specific recurring cycles; and DF signal averaging means for averaging values of a DF signal changing with the switching on/off action of said switching device and outputting an averaged DF signal; wherein said DF signal averaging means includes: