Flexible current sensor with stranded core

• US 10,732,208 B2
• Filed: 01/24/2018
• Issued: 08/04/2020
• Est. Priority Date: 02/13/2017
• Status: Active Grant

• Current Assignee: Gr{hacek over (n)}o, Ladislav
• Original Assignee: Gr{hacek over (n)}o, Ladislav
• Inventors: Gr{hacek over (n)}o, Ladislav
• Primary Examiner(s): Tang, Minh N
• Application Number:
  US16/477,997
• Publication Number:
  US 20200124644A1
• Time in Patent Office: 923 Days
• CPC Class Codes: G01R 15/181 using coils without a magnetic core, e.g. Rogowski coils

Abstract

A flexible current sensor comprising a sensing coil wound on a cylindrical flexible core where the sensing coil comprises two in series connected overlapping windings wound along the cylindrical flexible core in mutually opposite direction. The cylindrical flexible core comprises a plurality of individual fibers from a nonmagnetic material arranged into the nearest approximation of a cylindrical shape and the sensing coil is equipped with a nonconductive separation layer located between its windings.

Claims

1. A flexible current sensor comprising a sensing coil wound on a cylindrical flexible core, wherein said sensing coil comprises two overlapping in series connected windings wound along said cylindrical flexible core in mutually opposite direction, wherein said cylindrical flexible core comprises a plurality of individual fibers from a nonmagnetic material arranged into the nearest approximation of a cylindrical shape and the sensing coil is further equipped with a separation layer located between its windings;

wherein each of said plurality of individual fibers of the cylindrical flexible core from the nonmagnetic metallic material is covered by an insulating layer and said plurality of individual fibers of the cylindrical flexible core are mutually insulated.

2. The flexible current sensor according to claim 1, wherein said separation layer located between said windings of said sensing coil comprises at least one winding from a nonmetallic fiber.

3. The flexible current sensor according to claim 2, wherein said separation layer comprises multiple windings from nonmetallic fiber wound with an altered winding direction.

4. The flexible current sensor according to claim 1, wherein at least one winding of said sensing coil is wrapped with a homogenization foil.