Patent ID: 6566994
Filing Date: 2003-05-20
Classification: G01R

Abstract:
An AC current sensor having a coil structure for sensing current in a conductor, said coil structure comprising:a wire wound in a predetermined number of turns, with a uniform mean turn area of wire for each turn, at a constant pitch over a predetermined length along a longitudinal axis in passes in opposite directions along said longitudinal axis to provide an elongate coil structure wherein a number of turns in each pass is defined by said predetermined length divided by said constant pitch, a number of passes in each direction is defined by said predetermined number of turns divided by said number of turns in each pass, and a diameter of said wire is defined by said constant pitch divided by said number of passes in one direction, so that gaps between adjacent turns of wire in any pass are substantially completely filled in with turns of wire in other passes, wherein said coil structure is flexible along said length while maintaining substantially constant uniformity of mean turn area and number of turns per unit length.