SYSTEM FOR MEASURING INSULATION RESISTANCE AND METHOD OF THE SAME

A leakage resistance measuring system of the present invention comprises: a switching unit which provides one of a power supply voltage or ground voltage to one of a ground or battery output terminal in response to a control signal, and provides the other of the power supply voltage or ground voltag...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: CHOI HYEONHO, JUNG HEEWON, CHO INYOUNG, SHIN JAEGEUN
Format: Patent
Sprache:eng ; kor
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Beschreibung
Zusammenfassung:A leakage resistance measuring system of the present invention comprises: a switching unit which provides one of a power supply voltage or ground voltage to one of a ground or battery output terminal in response to a control signal, and provides the other of the power supply voltage or ground voltage to the other of the ground or battery output terminal; a buffer unit which amplifies a ground current flowing from the ground in response to either the power supply voltage or the ground voltage, an output current flowing from the high and low voltage terminals of a battery in response to the other of the power supply voltage or ground voltage, and a reference current flowing from the battery output terminal; and a control unit which uses the amplified ground current, output current, and reference current to calculate a synthetic leakage resistance between the ground and the high voltage terminal of the battery and between the ground and the low voltage terminal of the battery, and uses the ratio of the output current and the synthetic leakage resistance to calculate a first leakage resistance between the ground and the high voltage terminal of the battery and a second leakage resistance between the ground and the low voltage terminal of the battery, wherein the ground voltage has a voltage level greater than zero. According to the present invention, a manager can easily manage an electric charger based on a leakage current measured in real time. 본 발명인 누설저항 측정시스템은, 제어신호에 대응하여 전원전압 또는 그라운드전압 중 어느 하나를 접지 또는 배터리출력단 중 어느 하나에 제공하고, 전원전압 또는 그라운드전압 중 다른 하나를 접지 또는 배터리출력단 중 다른 하나에 제공하는 스위칭부, 전원전압 또는 그라운드전압 중 어느 하나에 대응하여 접지에서 흐르는 접지전류, 전원전압 또는 그라운드전압 중 다른 하나에 대응하여 배터리의 고전압단 및 저전압단에서 흐르는 출력전류, 배터리출력단에서 흐르는 기준전류를 증폭하는 버퍼부 및 증폭된 접지전류, 출력전류, 및 기준전류를 이용하여 접지와 배터리의 고전압단 사이 및 접지와 배터리의 저전압단 사이의 합성누설저항을 산출하고, 출력전류와 합성누설저항의 비를 이용하여 접지와 배터리의 고전압단 사이의 제1 누설저항 및 접지와 배터리의 저전압단 사이의 제2 누설저항을 산출하는 제어부를 포함하고, 그라운드전압은 0보다 큰 전압레벨을 가진다.