Power supply system for motor vehicle provided with control device of voltage applied to field coil of generator

摘要

A power supply system for a motor vehicle includes a generator that includes a rotor having a field coil and a stator having an armature coil; a rectifier that rectifies AC power generated in the armature coil; an excitation control circuit that takes control of a voltage applied to the field coil; a capacitor that is connected to the DC side of the rectifier, and receives and transfers the rectified power; a battery connected to an electric load of the motor vehicle; a DC-DC converter that is connected between the capacitor and the battery and capable of converting unidirectionally or bidirectionally an input DC voltage into any DC voltage; and a selection switch which connects the capacitor or the battery to the excitation control circuit as a power supply source.

主权项

1. A power supply system for a motor vehicle, the power supply system comprising:
a generator including:
a rotor having a field coil which is rotated by an engine, anda stator having an armature coil; a rectifier for rectifying AC power generated in the armature coil into DC power; an excitation control circuit which controls a voltage applied to the field coil; a capacitor, connected to a DC side of the rectifier, for receiving and transferring the DC power; a battery connected to an electric load of the motor vehicle; a DC-DC converter connected between the capacitor and the battery and capable of converting unidirectionally or bidirectionally an input DC voltage into another DC voltage; and a selection switch which selectively connects the capacitor or the battery as a power supply source for the excitation control circuit.