Patent ID: 6429627
Filing Date: 2002-08-06
Classification: H02P

Abstract:
A voltage regulator for a generator drivable by an internal combustion engine for regulating an on-board electrical system voltage for electrical consumers in motor vehicles, the voltage regulator comprising an exciter winding through which an exciter current flows which is varied so as to regulate an output voltage of the generator, so that a rise in the exciter current tripped when consumers are turned on is limited to predetermined values; a closed-loop control circuit for the exciter current and including a system with a digital pulse width modulator, which regulates a pulse width ratio of the exciter current by triggering a transistor power end stage by means of a pulse width modulated signal as a function of the detected output voltage of the generator; means for damping the system and cooperating in such a way with the pulse width modulator that at least one period of the pulse width modulated signal that is output is suppressed.