Dual voltage electrical system

Patent · Tue Aug 11 04:00:00 EDT 1987

OSTI ID:6096078

Radomski, T A

A dual voltage motor vehicle electrical system is described which consists of an alternating current generator having a polyphase output winding, a polyphase full-wave bridge rectifier comprised of groups of positive and negative diodes, the bridge rectifier having AC input terminals connected to the output winding and having positive and negative direct voltage output terminals, first and second storage batteries connected in series and across the direct voltage output terminals of the bridge rectifier, the negative terminal of one battery and the positive terminal of the other battery being connected to a common junction, a first switchable rectifying circuit connected between the junction and the AC input terminals, the first switchable rectifying circuit when biased conductive and one of the groups of diodes supplying charging current to one of the batteries, a second switchable rectifying circuit connected between the junction and the AC input terminals, the second switchable rectifying circuit when biased conductive and the other group of the diodes supplying charging current to the other battery, means for causing the switchable rectifying circuits to be biased alternately conductive, means for sensing the relative magnitudes of the voltages across the batteries, and means responsive to the difference in the voltages across the batteries for controlling the time periods that the switchable rectifying circuits are biased conductive.

• Assignee: General Motors Corp., Detroit, MI
• Patent Number(s): US 4686442
• OSTI ID: 6096078
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330300* -- Advanced Propulsion Systems-- Electric-Powered Systems
ALTERNATING CURRENT
ALTERNATORS
CONDUCTOR DEVICES
CONNECTORS
CURRENTS
ELECTRIC BATTERIES
ELECTRIC CONDUCTIVITY
ELECTRIC CURRENTS
ELECTRIC GENERATORS
ELECTRIC POTENTIAL
ELECTRICAL EQUIPMENT
ELECTRICAL PROPERTIES
ELECTROCHEMICAL CELLS
ELECTRONIC CIRCUITS
EQUIPMENT
PHYSICAL PROPERTIES
RECTIFIERS
SEMICONDUCTOR DEVICES
SEMICONDUCTOR DIODES
SWITCHING CIRCUITS
VEHICLES