Title:
CURRENT DETECTION DEVICE AND MOTOR DRIVE DEVICE PROVIDED WITH SAME
Document Type and Number:
WIPO Patent Application WO/2023/162246
Kind Code:
A1
Abstract:
This current detection device comprises: a main current detection circuit and an offset correction current detection circuit for detecting the current through a current pathway at the same detection position; a short-circuit unit for short-circuiting between the current input terminals of an AD converter in the offset correction current detection circuit; a first offset correction unit for measuring a first offset of the offset correction current detection circuit while short-circuiting is occurring between the current input terminals, and removing a first offset equivalent from the output of the offset correction current detection circuit; and a second offset correction unit for calculating a second offset amount of the main current detection circuit on the basis of the corrected output of the offset correction current detection circuit and the output of the main current detection circuit obtained at the same detection timing while no short-circuiting is occurring between the current input terminals, and removing a second offset equivalent from the output of the main current detection circuit.
Inventors:
OOI YOUICHIROU (JP)
Application Number:
PCT/JP2022/008357
Publication Date:
August 31, 2023
Filing Date:
February 28, 2022
Export Citation:
Assignee:
FANUC CORP (JP)
International Classes:
G01R35/00; G01R15/00; G01R19/25
Domestic Patent References:
| WO2012153371A1 | 2012-11-15 |
Foreign References:
| JP2013106125A | 2013-05-30 | |||
| JP2010141776A | 2010-06-24 | |||
| JP2000201074A | 2000-07-18 | |||
| JP2016012760A | 2016-01-21 | |||
| JP2017161409A | 2017-09-14 | |||
| JP2017096628A | 2017-06-01 |
Attorney, Agent or Firm:
AOKI, Atsushi et al. (JP)
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