Title:
ELECTRIC CURRENT DETECTION DEVICE
Document Type and Number:
WIPO Patent Application WO/2020/241367
Kind Code:
A1
Abstract:
Bent parts 30u, 30v are formed in magnetic shielding parts 3u, 3v such that as end part 6u vicinities forming an opening part 5u become closer to the end parts 6u, the opening surface area of the opening part 5u becomes larger. With respect to the U-phase and the V-phase adjacent thereto, the electric current flowing through the V-phase conductor Bv causes a magnetic field Bvu to be input from the V-phase to the U-phase and into the magnetic shielding part 3u. The magnetic field Bvu is guided by the bent parts 30u, 30v and concentrated in an end part 6u of the opening part 5u of the magnetic shielding part 3u. That is, the narrow gap between the bent parts 30u, 30v partially decreases magnetic resistance and makes it possible to focus magnetic flux in the bent parts 30u, 30v and reduce the amount of magnetic flux that flows into the magnetic shielding part 3u. As a result, a magnetic detection element 2u is not easily influenced by the magnetic fields of adjacent phases.
Inventors:
SASANUMA TAKAYUKI (JP)
KATO TAKESHI (JP)
KATO TAKESHI (JP)
Application Number:
PCT/JP2020/019720
Publication Date:
December 03, 2020
Filing Date:
May 19, 2020
Export Citation:
Assignee:
HITACHI AUTOMOTIVE SYSTEMS LTD (JP)
International Classes:
G01R15/20
Domestic Patent References:
| WO2018159229A1 | 2018-09-07 |
Foreign References:
| JP2013148513A | 2013-08-01 | |||
| JP2014160035A | 2014-09-04 | |||
| JP2017181415A | 2017-10-05 | |||
| JP2014006181A | 2014-01-16 |
Attorney, Agent or Firm:
TODA Yuji (JP)
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