Title:
CURRENT DETECTOR FOR LINE CURRENT DETECTION
Document Type and Number:
Japanese Patent JP3305445
Kind Code:
B2
Abstract:
PURPOSE: To enhance the accuracy in measurement by measuring the current based on the flux in the core of a magnetic body measured by inserting a Hall element into the core of magnetic body where the initial magnetization is fixed constant.
CONSTITUTION: The line current detector comprises a second coil part 22 to be fed with a current for initializing the magnetization of the core 1 of magnetic body. DC or AC current is fed to the second coil part 22 for initialization so that the initial magnetization of the core 1 is fixed constant thus enhancing the measurement accuracy of a Hall element 4 disposed in the air gap 3 of the core 1.
Inventors:
Hideo Suzuki
Michio Nemoto
Michio Nemoto
Application Number:
JP20874493A
Publication Date:
July 22, 2002
Filing Date:
July 30, 1993
Export Citation:
Assignee:
NEC Tokin Co., Ltd.
International Classes:
G01R15/20; (IPC1-7): G01R15/20
Domestic Patent References:
| JP59107270A |