Apparatus and method for detecting voltage unbalance, and power meter using the same
AssigneeSamsung Electro-Mechanics Co., Ltd.
InventorJung Hoo LEE
Life of this patent
Estimating the term…
Abstract
There are provided an apparatus and a method for detecting a voltage unbalance and a power meter using the same. The apparatus for detecting a voltage unbalance may a voltage unbalance detection unit including a plurality of voltage unbalance detectors that respectively receive a phase voltage from among a plurality of phase voltages included in input voltages and when the phase voltage is unbalanced, output interrupt signals, and a control unit determining a phase in which an interrupt has occurred, by using a plurality of pieces of accumulated voltage information regarding the plurality of phase voltages output from the plurality of respective voltage unbalance detectors.
Claims16
An apparatus for detecting a voltage unbalance, comprising:
- a voltage unbalance detection unit including a plurality of voltage unbalance detectors that respectively receive a phase voltage from among a plurality of phase voltages included in input voltages and when the phase voltage is unbalanced, output interrupt signals;
- and
- a control unit determining a phase in which an interrupt has occurred, by using a plurality of pieces of accumulated voltage information regarding the plurality of phase voltages output from the plurality of respective voltage unbalance detectors.
A power meter, comprising:
- a voltage unbalance detection unit receiving a plurality of phase voltages forming a system voltage, determining whether voltage unbalances have occurred in the plurality of respective phase voltages, outputting interrupt signals for the corresponding phase voltages when it is determined that the voltage unbalances have occurred, and outputting accumulated voltage information regarding each of the plurality of phase voltages at predetermined interval of times;
- an interrupt management unit performing an OR operation on the interrupt signals output from the voltage unbalance detection unit to output an interrupt generation signal;
- and
- an accumulated value comparison unit determining whether sag or swell has occurred in the plurality of phase voltages and outputting an unbalance determination signal, by using the accumulated voltage information output from the voltage unbalance detection unit.
A method for detecting a voltage unbalance performed by an apparatus for detecting a voltage unbalance, the method comprising:
- generating accumulated voltage information regarding each of the plurality of phase voltages included in input voltages at predetermined interval of times;
- and
- determining whether a voltage unbalance has occurred in each of the plurality of phase voltages, by using the accumulated voltage information.
Dependencies are inferred from the claim text.