Title:
EXCITATION CIRCUIT, CURRENT SENSOR, AND MEASURING DEVICE
Document Type and Number:
WIPO Patent Application WO/2023/157902
Kind Code:
A1
Abstract:
This excitation circuit comprises: a first operational amplifier that supplies a first excitation current to a first coil that forms a first flux gate; and a second operational amplifier that supplies a second excitation current to a second coil that forms a second flux gate. The excitation circuit further comprises a signal generation circuit that generates input signals for the first operational amplifier and the second operational amplifier. The signal generation circuit includes: a third operational amplifier that generates, as the input signal for the first operational amplifier, an inverted voltage or a non-inverted voltage on the basis of an alternating-current excitation voltage for exciting the pair of flux gates; and a fourth operational amplifier that generates, as the input signal for the second operational amplifier, an inverted voltage or a non-inverted voltage on the basis of the alternating-current excitation voltage.
Inventors:
KARASAWA YUKI (JP)
IKEDA KENTA (JP)
NAKAZAWA KOKI (JP)
XIA PEIYU (JP)
YAMAGISHI KIMIHIKO (JP)
IKEDA KENTA (JP)
NAKAZAWA KOKI (JP)
XIA PEIYU (JP)
YAMAGISHI KIMIHIKO (JP)
Application Number:
PCT/JP2023/005380
Publication Date:
August 24, 2023
Filing Date:
February 16, 2023
Export Citation:
Assignee:
HIOKI ELECTRIC WORKS (JP)
International Classes:
G01R15/18
Domestic Patent References:
| WO2013088766A1 | 2013-06-20 |
Foreign References:
| JP2014122879A | 2014-07-03 | |||
| JP2018179689A | 2018-11-15 | |||
| JP2001228181A | 2001-08-24 | |||
| JP2004245597A | 2004-09-02 | |||
| US6954060B1 | 2005-10-11 | |||
| JPS56174060U | 1981-12-22 | |||
| JPS6365374A | 1988-03-23 |
Attorney, Agent or Firm:
GOTOH & PARTNERS (JP)
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