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1. WO2020059898 - MAGNETIC SENSOR-BASED CURRENT SENSOR USING VARIABLE BIAS POWER SUPPLY FOR SMART GRID

Publication Number WO/2020/059898
Publication Date 26.03.2020
International Application No. PCT/KR2018/010971
International Filing Date 18.09.2018
IPC
G01R 15/20 2006.01
GPHYSICS
01MEASURING; TESTING
RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
15Details of measuring arrangements of the types provided for in groups G01R17/-G01R29/, G01R33/-G01R33/26176
14Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
20using galvano-magnetic devices, e.g. Hall-effect devices
G01R 19/257 2006.01
GPHYSICS
01MEASURING; TESTING
RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
19Arrangements for measuring currents or voltages or for indicating presence or sign thereof
25using digital measurement techniques
257using analogue/digital converters of the type with comparison of different reference values with the value of voltage or current, e.g. using step-by-step method
Applicants
  • 전자부품연구원 KOREA ELECTRONICS TECHNOLOGY INSTITUTE [KR/KR]; 경기도 성남시 분당구 새나리로 25 25, Saenari-ro Bundang-gu, Seongnam-si Gyeonggi-do 13509, KR
Inventors
  • 이성호 LEE, Sung Ho; KR
  • 이성철 LEE, Sung Chul; KR
Agents
  • 남충우 NAM, Choong Woo; KR
Priority Data
Publication Language Korean (KO)
Filing Language Korean (KO)
Designated States
Title
(EN) MAGNETIC SENSOR-BASED CURRENT SENSOR USING VARIABLE BIAS POWER SUPPLY FOR SMART GRID
(FR) CAPTEUR DE COURANT À CAPTEUR MAGNÉTIQUE UTILISANT UNE ALIMENTATION ÉLECTRIQUE À POLARISATION VARIABLE POUR RÉSEAU ÉLECTRIQUE INTELLIGENT
(KO) 스마트 그리드용 가변 바이어스 전원을 이용한 자기 센서 기반 전류 센서
Abstract
(EN)
Provided is a magnetic sensor-based current sensor using a variable bias power supply for a smart grid. A current sensor according to an embodiment of the present invention comprises: a magnetic sensor for measuring the magnitude of a magnetic field generated by a current; a signal processor for calculating the magnitude of the current from the magnitude of the magnetic field measured by the magnetic sensor; and a controller for variably controlling the output scale of the magnetic sensor. Therefore, by using a variable bias power supply to drive the magnetic sensor, sensitivity can be improved without adding an element to the current sensor, even in a section in which the magnitude of current is small in AC.
(FR)
L'invention concerne un capteur de courant à capteur magnétique utilisant une alimentation électrique à polarisation variable pour un réseau électrique intelligent. Un capteur de courant selon un mode de réalisation de la présente invention comprend : un capteur magnétique pour mesurer l'amplitude d'un champ magnétique généré par un courant ; un processeur de signal pour calculer l'amplitude du courant à partir de l'amplitude du champ magnétique mesurée par le capteur magnétique ; et un dispositif de commande pour commander de manière variable l'échelle de sortie du capteur magnétique. Par conséquent, en utilisant une alimentation électrique à polarisation variable pour entraîner le capteur magnétique, la sensibilité peut être améliorée sans ajouter un élément au capteur de courant, même dans une section dans laquelle l'amplitude du courant est faible en CA.
(KO)
스마트 그리드용 가변 바이어스 전원을 이용한 자기 센서 기반 전류 센서가 제공된다. 본 발명의 실시예에 따른 전류 센서는, 전류에 의해 발생하는 자기장의 크기를 측정하는 자기 센서, 자기 센서에 의해 측정된 자기장의 크기로부터 전류의 크기를 산출하는 신호 처리기 및 자기 센서의 출력 스케일을 가변적으로 제어하는 제어기를 포함한다. 이에 의해, 가변 바이어스 전원을 이용하여 자기 센서를 구동하여, AC에서 전류의 크기가 작은 구간에서도 전류 센서에 소자 추가 없이도 감도를 향상시킬 수 있게 된다.
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