US 8,710,808 B2Granted

Power supply system for motor vehicle

AssigneeMitsubishi Electric Corporation

InventorsNozomu Kamioka, Shinji Nishimura, Noriyuki Wada

Life of this patent

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Abstract

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.

Claims3

Dependent claims

A power supply system for a motor vehicle, comprising:

a generator including a field coil and a stator having a three-phase armature coil;
a rectifier for rectifying AC power generated in the armature coil into DC power;
an excitation control circuit for taking control of a voltage applied to the field coil;
a capacitor, connected to a DC side of the rectifier, for receiving the DC power from the rectifier 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 from the capacitor and the battery into another DC voltage;
and
diodes each provided between the capacitor and the excitation control circuit and between the battery and the excitation control circuit.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 13/753,736Filed 30 Jan 2013 · division
Priority: JP 2010-0903839 Apr 2010
Published: US 2013/0140816 A16 Jun 2013
Granted: 29 Apr 2014
Term ends: Not estimatedThe source records don’t support an estimate.

Classification7 codes

H02P 9/48
Arrangements for controlling electric generators for the purpose of obtaining a desired output: arrangements for obtaining a constant output value…
F02N 11/0862
Circuits specially adapted for starting of engines: characterised by the electrical power supply means, e.g. battery
H02J 7/16
For charging batteries from dynamo-electric generators driven at varying speed, e.g. on vehicle: regulation of the charging current or voltage by…
H02J 7/163
Regulation of the charging current or voltage by variation of field: with special means for initiating or limiting the excitation current

Family

Application12/956,387Parent of this division · filed 30 Nov 2010
US 2013/0140816 A1Pre-grant publication · published 6 Jun 2013
US 2011/0248687 A1Published application
US 8,981,735 B2Related patent
US 8,710,808 B2This patent

From the US filing history. Foreign family members aren’t listed.