US 6,320,404 B1 · Defective power source detection method and apparatus of power source supply system

Abstract

The defective power source detecting apparatus of a power source supply system has: an output voltage monitoring circuit 16-1 to 16-N for monitoring the DC voltage on an output end of the rectifier circuit which is an output end of each power source apparatus, and for outputting a defect detecting signal to show that the defective state occurs, when the output of the rectifier circuit is abnormal; an inverter output monitoring circuit 18-1 to 18-N for monitoring an inverter output of each power supply apparatus, and for outputting a defect detecting signal to show that the defective state occurs, when the output of the inverter is abnormal; and a control circuit 50 for fetching the monitoring outputs of the output voltage monitoring means and the inverter output monitoring means, and for judging the power source apparatus corresponding to the case in which the outputs of the rectifier circuit and the inverter are abnormal, to be defective.

Claims6

Dependent claims

A method of detecting a defective power source in a power source supply system for supplying a large DC voltage to an apparatus through a power supply line, the method comprising:

preparing a plurality of power sources connected in parallel to the power supply line, wherein each of the plurality of power sources includes an inverter and a rectifying circuit for converting an output of the inverter to a DC voltage;
monitoring an output being the DC voltage on an output end of each of the rectifier circuits connected to the power source supply line;
monitoring the output on an output end of each of the inverters;
and
judging that one of plurality of the power source is defective if both of the outputs of the inverter and the rectifying circuit in the one of the plurality of power sources are abnormal.

2 more elements

A defective power source detecting apparatus for a power source supply system, the defective power source detecting apparatus comprising:

a plurality of power sources for supplying a DC voltage to an apparatus requiring a large power through a power supply line, the plurality of power sources connected in parallel to the power supply line, each of the plurality of power sources having an inverter and a rectifier circuit for converting the inverter output into a DC voltage,
an output voltage monitoring means for monitoring the DC voltage on an output end of the rectifier circuit which is an output end of each of the plurality of power sources, the output voltage monitoring means for outputting a defect detecting signal to show that the defective state occurs when the output of the rectifier circuit is abnormal;
an inverter output monitoring means for monitoring an inverter output of each of the plurality of power sources, the inverter output monitoring means for outputting a defect detecting signal to show that the defective state occurs when the output of the inverter is abnormal;
and
a judgement means into which the defect detecting signals of the output voltage monitoring means and the inverter output monitoring means in the plurality of power sources are input, the judgement means for judging that one of the plurality of the power sources is abnormal if both of the detecting signals of the rectifier circuit and the inverter in the one of the plurality of power sources are abnormal.

2 more elements

Dependencies are inferred from the claim text.

Defective power source detection method and apparatus of power source supply system

Life of this patent

Defective power source detection method and apparatus of power source supply system

Life of this patent

Abstract

Claims6