US 12,259,410 B2
Rogowski-type current sensor and inverter, and method of mounting Rogowski-type current sensor
Ichiro Omura, Fukuoka (JP)
Assigned to KYUSHU INSTITUTE OF TECHNOLOGY, Fukuoka (JP)
Appl. No. 18/282,961
Filed by KYUSHU INSTITUTE OF TECHNOLOGY, Fukuoka (JP)
PCT Filed Mar. 10, 2022, PCT No. PCT/JP2022/010621
§ 371(c)(1), (2) Date Sep. 19, 2023,
PCT Pub. No. WO2022/202367, PCT Pub. Date Sep. 29, 2022.
Claims priority of application No. 2021-050490 (JP), filed on Mar. 24, 2021; and application No. 2021-152900 (JP), filed on Sep. 21, 2021.
Prior Publication US 2024/0168062 A1, May 23, 2024
Int. Cl. G01R 15/18 (2006.01); G01R 19/00 (2006.01); H05K 1/02 (2006.01)
CPC G01R 15/181 (2013.01) [G01R 19/0092 (2013.01); H05K 1/028 (2013.01); H05K 2201/10151 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A Rogowski-type current sensor comprising a main body formed from a belt-shaped flexible wiring board and capable of surrounding a current path of a measurement target, the main body including a measuring portion in which a Rogowski coil is formed in a length direction by a conductive pattern, wherein the Rogowski coil is configured in which a plurality of coils constituting the Rogowski coil are continuously connected along a closed line formed when surrounding the current path of the measurement target, by a forward line parallel to the closed line, between an end of winding of any coil and a start of winding of a next coil among coils adjacent to each other, and has a backward line parallel to the closed line from an end of winding of a last coil of the plurality of coils toward a start of winding of a first coil,
the coil is formed from a first side having an end of winding of the coil and a start of winding of the next coil, a second side located on a side opposite to the first side, and third side and fourth side connecting both end portions of the first side and the second side, and
one side of the third side and the fourth side is a plane including the other side, and is formed at a position deviating from a plane orthogonal to the closed line, and
when a value indicating a coil pitch between the coils is defined as Wp, a value indicating an amount of deviation between the third side and the fourth side is defined as Ws, a value indicating a height from a second side to the first side is defined as T1, and a value indicating a height from the backward line to the first side is defined as T2, a relationship of 0<Ws<2×Wp×T2/T1 is satisfied.