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1. WO2000043795 - CURRENT SENSOR

Publication Number WO/2000/043795
Publication Date 27.07.2000
International Application No. PCT/JP1999/003587
International Filing Date 02.07.1999
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 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 15/20
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
20using galvano-magnetic devices, e.g. Hall-effect devices ; , i.e. measuring a magnetic field via the interaction between a current and a magnetic field, e.g. magneto resistive or Hall effect devices
Applicants
  • TDK CORPORATION [JP/JP]; 13-1, Nihonbashi 1-chome Chuo-ku Tokyo 103-8272, JP (AllExceptUS)
  • NAKAGAWA, Shiro [JP/JP]; JP (UsOnly)
  • ITOH, Kazuyuki [JP/JP]; JP (UsOnly)
  • TANAKA, Katsuaki [JP/JP]; JP (UsOnly)
  • YABUSAKI, Katsumi [JP/JP]; JP (UsOnly)
Inventors
  • NAKAGAWA, Shiro; JP
  • ITOH, Kazuyuki; JP
  • TANAKA, Katsuaki; JP
  • YABUSAKI, Katsumi; JP
Agents
  • HOSHIMIYA, Katsumi; Yagyu Building 202 15-12, Shinjuku 1-chome Shinjuku-ku Tokyo 160-0022, JP
Priority Data
11/11324021.04.1999JP
11/1258421.01.1999JP
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) CURRENT SENSOR
(FR) DETECTEUR DE COURANT
Abstract
(EN)
A current sensor is provided to reduce measurement errors due to the change in position of the current path through a hole in a yoke. The current sensor comprises an annular yoke (2) enclosing the current path (1) and having a gap (3); a magnetic sensor element (4) arranged in the gap (3) of the yoke (2) to measure the current flowing through the current path (1); and a magnetic shield (5) arranged between the current path (1) and the gap (3) to shield the magnetic sensor element (4) from the magnetic field due to the magnetic fluxes which are produced by the current flowing through the current path (1) but do not pass the yoke (2).
(FR)
L'invention concerne un détecteur de courant permettant de réduire les erreurs de mesure résultant du déplacement d'un passage de courant dans l'orifice d'une culasse. Le détecteur de courant comprend une culasse (2) annulaire entourant un passage (1) de courant et présentant une ouverture (3). Un élément (4) de détection magnétique disposé dans l'ouverture (3) de la culasse permet de mesurer le courant dans la passage (1) de courant, et un blindage (5) magnétique est disposé entre le passage (1) du courant et l'ouverture (3) afin de protéger l'élément (4) détecteur magnétique du champ magnétique qui provient des courants magnétiques produits par le courant dans le passage (1) de courant mais ne vont pas au-delà de la culasse (2).
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