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1. WO2013016002 - CURRENT SENSOR

Publication Number WO/2013/016002
Publication Date 31.01.2013
International Application No. PCT/US2012/046391
International Filing Date 12.07.2012
IPC
G01R 15/18 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
18using inductive devices, e.g. transformers
G01R 19/00 2006.01
GPHYSICS
01MEASURING; TESTING
RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
19Arrangements for measuring currents or voltages or for indicating presence or sign thereof
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
CPC
G01R 15/183
GPHYSICS
01MEASURING; TESTING
RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
15Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00 and G01R33/00 - G01R35/00
14Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
18using inductive devices, e.g. transformers
183using transformers with a magnetic core
G01R 19/0015
GPHYSICS
01MEASURING; TESTING
RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
19Arrangements for measuring currents or voltages or for indicating presence or sign thereof
0007Frequency selective voltage or current level measuring
0015separating AC and DC
Applicants
  • ABB INC. [US]/[US] (AllExceptUS)
  • GOKHALE, Kalyan, P. [US]/[US] (UsOnly)
Inventors
  • GOKHALE, Kalyan, P.
Agents
  • KATTERLE, Paul, R.
Priority Data
13/192,78328.07.2011US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) CURRENT SENSOR
(FR) CAPTEUR DE COURANT
Abstract
(EN)
A current sensor (70) is provided for measuring DC current (Ι^) in a primary conductor (40) also carrying AC current (lac). The current sensor includes a ferromagnetic core (50) through which the primary conductor may extend. The core has a narrow air gap (56) formed there in and a magnetic flux sensor (58) is disposed in the air gap. A secondary winding (60) is mounted to the core and has an impedance (72) connected therein. The impedance has a value of substantially zero at one or more frequencies of the AC current. The impedance may be a short or an impedance source that includes a capacitor (76) and an inductor (74).
(FR)
L'invention porte sur un capteur de courant (70) destiné à mesurer un courant CC (I^) dans un conducteur primaire (40) portant également un courant CA (Ica). Le capteur de courant comprend un noyau ferromagnétique (50) à travers lequel le conducteur primaire peut s'étendre. Le noyau a un entrefer étroit (56) formé dans celui-ci et un capteur de flux magnétique (58) est disposé dans l'entrefer. Un enroulement secondaire (60) est monté sur le noyau et a une impédance (72) montée dans celui-ci. L'impédance a une valeur de sensiblement zéro à une ou plusieurs fréquences du courant CA. L'impédance peut être un court-circuit ou une source d'impédance qui comprend un condensateur (76) et un inducteur (74).
Also published as
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