US 2025/0149973 A1 · POWER SUPPLY SYSTEM AND VOLTAGE DETECTION METHOD

Abstract

A power supply system includes a voltage conversion circuit and at least one voltage detector. The voltage conversion circuit converts AC voltage into DC voltage. The voltage detector includes a voltage dividing circuit, a phase voltage detection circuit, and a line voltage detection circuit. The voltage dividing circuit is coupled to the voltage conversion circuit to receive AC voltage. The voltage dividing circuit includes multiple impedance elements and multiple voltage dividing nodes to output multiple divided voltages. The phase voltage detection circuit is coupled to one of the voltage dividing nodes of voltage dividing circuit to generate a phase voltage detection signal based on one of the divided voltages. The line voltage detection circuit is coupled to a part of the voltage dividing nodes of voltage dividing circuit to generate a line voltage detection signal based on a part of the divided voltages.

Claims20

Dependent claims

A power supply system comprising:

a voltage conversion circuit configured to convert an alternating current voltage into a DC voltage;
and
at least one voltage detector comprising:
a voltage dividing circuit coupled to the voltage conversion circuit to receive the alternating current voltage, wherein the voltage dividing circuit comprises a plurality of impedance elements and a plurality of voltage dividing nodes to output a plurality of divided voltages;
a phase voltage detection circuit coupled to one of the plurality of voltage dividing nodes of the voltage dividing circuit to generate a phase voltage detection signal based on one of the plurality of divided voltages;
and
a line voltage detection circuit coupled to a part of the plurality of voltage dividing nodes of the voltage dividing circuit to generate a line voltage detection signal based on the part of the plurality of divided voltages.

4 more elements

A voltage detection method comprising:

coupling a first voltage detector to a plurality of first detection nodes of a medium voltage system cabinet, and coupling a second voltage detector to a plurality of second detection nodes of the medium voltage system cabinet, wherein the plurality of first detection nodes are coupled between a plurality of phase voltage input nodes and a plurality of first circuit elements, and the plurality of second detection nodes are coupled between the plurality of first circuit elements and a plurality of second circuit elements;
obtaining a plurality of first phase voltage detection signals of the plurality of first detection nodes through the first voltage detector, and obtaining a plurality of second phase voltage detection signals of the plurality of second detection nodes through the second voltage detector;
determining whether the plurality of first phase voltage detection signals and the plurality of second phase voltage detection signals are normal or not through a controller;
and
generating an abnormal signal when the plurality of first phase voltage detection signals are normal but one of the plurality of second phase voltage detection signals is abnormal.

2 more elements

Dependencies are inferred from the claim text.

Power supply system and voltage detection method

Life of this patent

Power supply system and voltage detection method

Life of this patent

Abstract

Claims20