Title:
電流検出器
Document Type and Number:
Japanese Patent JP6879645
Kind Code:
B2
Abstract:
A current sensor (100) includes: a magnetic core (104) which focuses a magnetic field generated by continuity of a current to be sensed IP; a Hall element (108) which outputs a sensing signal according to an intensity of the magnetic field focused by the magnetic core (104); and a feedback circuit (116) which applies a feedback current to a secondary winding (118) based on the sensing signal from the Hall element (108) and balances magnetism. The current sensor (100) further includes a coupling circuit (124) which couples supply paths (123, 124) of a direct-current power supply (122) to the feedback circuit (116) and an application path (117) of a feedback current to the secondary winding (118) via capacitors (C1, C2).
Inventors:
Kiyotaka Morita
Application Number:
JP2018162461A
Publication Date:
June 02, 2021
Filing Date:
August 31, 2018
Export Citation:
Assignee:
TAMURA CORPORATION OF CHINA LIMITED
International Classes:
G01R15/20; G01R19/00
Domestic Patent References:
| JP2016114585A | ||||
| JP2016125863A | ||||
| JP2015206596A | ||||
| JP2005055300A |
Foreign References:
| US20040119519 | ||||
| EP2515124A2 |
Attorney, Agent or Firm:
Takahiro Yamazaki