Current sensing arrangement with encircling current-carrying line and ferromagnetic sheet concentrator

A current sensing arrangement comprising:

• means for sensing a current via magnetic field sensing and for providing an output indicative of the amount of sensed current;
• means for providing a current that encircles said means for sensing and outputs a magnetic field;
• and
• means for concentrating the magnetic field output from said means for providing a current to said means for sensing via transmission through a ferromagnetic sheet material;
• wherein said means for providing a current includes a line that radially spirals with a plural number of turns around said means for sensing a current.

A current sensing arrangement comprising:

• a Hall effect sensor;
• a current-carrying line encircling said Hall effect sensor;
• and
• a ferromagnetic sheet material covering a portion of said current-carrying line and a portion of said Hall effect sensor;
• wherein said current-carrying line spirals around said Hall effect sensor, said current-carrying line has a plurality of spiral turns around said Hall effect sensor, a first portion of said spiral turns of said current-carrying line spiral inward toward said Hall effect sensor and a second portion of said spiral turns of said current-carrying line spiral outward away from said Hall effect sensor, and said arrangement is located on a board that has a first planar surface, a second planar surface and an aperture extending through said board between said first and second surfaces, said Hall effect sensor is located within said aperture, said first portion of spiral turns of said current-carrying line is located adjacent to said first surface of said board, and said second portion of spiral turns of said current-carrying line is located adjacent to said second surface of said board.

A current sensing arrangement comprising:

• a Hall effect sensor;
• a current-carrying line encircling said Hall effect sensor;
• and
• a ferromagnetic sheet material covering a portion of said current-carrying line and a portion of said Hall effect sensor;
• wherein said arrangement includes an electrical insulating sheet material extending between said ferromagnetic sheet material and said portion of said current carrying line, and a sheet material retaining clip, and said arrangement is located on a board that has a first planar surface, a second planar surface and an aperture extending through said board between said first and second surfaces, said Hall effect sensor is located within said aperture, said current-carrying line is located adjacent to one of said first and second surfaces of said board, and said ferromagnetic sheet material and said electrical insulating sheet material wrap around said board and are held in place relative to said board, said current-carrying line and said Hall effect sensor by said sheet material retaining clip.