Title:
CONSTANT-EXCITATION-MAGNETIC-FLUX-TYPE CURRENT SENSOR
Document Type and Number:
WIPO Patent Application WO/2016/103502
Kind Code:
A1
Abstract:
A constant-excitation-magnetic-flux-type current sensor configured from: a sensor unit that is configured from a magnetic fluid magnetic bridge and a detection coil wound around the magnetic circuit of the magnetic fluid magnetic bridge and is further provided with an excitation-magnetic-flux detection coil that is wrapped around the magnetic circuit of the magnetic fluid magnetic bridge and is for receiving an excitation-magnetic-flux detection signal (electromotive force); and a negative feedback control mechanism provided with a variable amplifier for amplifying an excitation signal, a drive circuit for passing amplified excitation current to an excitation coil, an excitation-magnetic-flux detection coil for receiving an excitation-magnetic-flux detection signal (electromotive force) proportional to the size of the excitation magnetic flux of the excitation coil, an AC amplifier for amplifying the excitation-magnetic-flux detection signal received by the excitation-magnetic-flux detection coil to a size that is easy to manage, and a rectifier circuit for carrying out rectification so that the size can be expressed by a direct current.
Inventors:
TADATSU TAKASHI (JP)
Application Number:
PCT/JP2014/084668
Publication Date:
June 30, 2016
Filing Date:
December 26, 2014
Export Citation:
Assignee:
YYOFFICE YK (JP)
TADATSU TAKASHI (JP)
TADATSU TAKASHI (JP)
International Classes:
G01R15/18
Domestic Patent References:
| WO2003107017A1 | 2003-12-24 |
Foreign References:
| JP4310373B1 | 2009-08-05 | |||
| JPH04233451A | 1992-08-21 |
Attorney, Agent or Firm:
TANAKA, YASUKO (JP)
Yasuko Tanaka (JP)
Yasuko Tanaka (JP)
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