Title:
電流から発生する磁界を検知して電流量を推定する方法
Document Type and Number:
Japanese Patent JP5616431
Kind Code:
B2
Abstract:
When a through hole (2) is formed in a primary conductor (1), a measurement target current (I) partially becomes a bypass current (Ia) that flows around the through hole (2). Only a magnetic field component (Hx) in the X-axis direction is generated from the current that flows through a portion without the influence of the through hole (2). However, the bypass current (Ia) generates a magnetic field component (Hy) in the Y-axis direction at the tilt portion. A magnetic detection element (3) having a magnetic field detection sensitivity only in the Y-axis direction is installed near the through hole (2) such that the magnetic field detection direction is set in the Y-axis direction, thereby detecting the magnetic field component (Hy) and measuring the current amount without the influence of a neighboring current.
Inventors:
川瀬 正博
Application Number:
JP2012506818A
Publication Date:
October 29, 2014
Filing Date:
March 18, 2011
Export Citation:
Assignee:
キヤノン電子株式会社
International Classes:
G01R15/20
Domestic Patent References:
| JP2007121283A | 2007-05-17 | |||
| JP2002516396A | 2002-06-04 |
Foreign References:
| WO2008030129A2 | 2008-03-13 | |||
| DE10110254A1 | 2002-09-05 |
Attorney, Agent or Firm:
Yasunari Otsuka
Shiro Takayanagi
Yasuhiro Otsuka
Hideji Kimura
Shimoyama 治
Yukimitsu Nagagawa
Shiro Takayanagi
Yasuhiro Otsuka
Hideji Kimura
Shimoyama 治
Yukimitsu Nagagawa