Fault tolerant power supply and bus topology for a distributed a

Details Fault tolerant power supply and bus topology for a distributed a Fault tolerant power supply and bus topology for a distributed a

1998-05-08

2000-04-04

Paladini, Albert W.

Electrical transmission or interconnection systems

Vehicle mounted systems

Automobile

2807281, 701 34, 701 45, G06F 126

Patent

active

060465115

ABSTRACT:
An improved distributed architecture SIR system wherein the idle voltage of the power and communications bus is regulated by a fault tolerant power supply circuit, and portions of the bus coupled to devices located in a crush zone of the vehicle may be de-coupled from other portions of the bus in the event of a short circuit across the wires of that portion of the bus. The power and communications bus comprises two wires (signal and ground) and the bus ground wire is weakly biased to a reference voltage. A boost power supply referenced to the bus ground establishes the nominal voltage of the signal wire, and supplies charging current over the signal wire to the energy reserve circuits of various devices coupled to the bus. The power supply is transformer-isolated from the bus, and the feedback circuitry for controlling the operation of the power supply senses the bus voltage as coupled through the transformer. Consequently, the power supply retains the ability to regulate the bus voltage in fault conditions where the ground or signal wires of the bus are shorted to vehicle ground or battery voltage. In such conditions, the bus ground shifts from its normal value, and is detected to provide a warning indication to the operator of the vehicle. Open circuit failures of the bus wires are addressed by configuring the bus in a closed ring topology, and short circuits across the bus wires are addressed by configuring the bus so that portions of the bus disposed in one or more crush zones of the vehicle can be de-coupled from the rest of the bus.

REFERENCES:
patent: 4999775 (1991-03-01), Muraoka
patent: 5357518 (1994-10-01), Peter
patent: 5422965 (1995-06-01), Bekki et al.
patent: 5646454 (1997-07-01), Mattes et al.
patent: 5696777 (1997-12-01), Hofsaess
patent: 5856710 (1999-01-01), Baughman et al.

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