MAGNETIC SENSOR AND METHOD OF MANUFACTURING SUCH, MAGNETIC CONTROL DEVICE, AND CURRENT SENSOR DESIGN METHOD

摘要

A current sensor includes a magnetic detection unit capable of detecting the magnetism, a first magnetic shield and a second magnetic shield. The first magnetic shield includes a first shield section and two second shield sections respectively connected in the vicinity of the two ends thereof. The second magnetic shield includes a third shield section and two fourth shield sections respectively connected in the vicinity of the two ends thereof. Between the first shield section and the third shield section is a conductor placement region, and the magnetic detection unit is positioned between the first shield section and the conductor placement region and is provided at a magnetic field canceling position where the magnetic field in the second direction is substantially zero at non-energized times after a prescribed current has flowed in the conductor, in relationship to the length of the two fourth shield sections along the third direction.