Rotation information calculating device, rotation information calculating device with rolling bearing, and rotation information calculating device with motor

摘要

PROBLEM TO BE SOLVED: To achieve a structure capable of obtaining signals resistant to noise as signals used when rotation information computation process is executed.;SOLUTION: Three magnetic path members 12 and 12 are arranged circumferentially at equal intervals in sections facing a magnetized surface of an encoder 9a in an axial direction. A pair of magnetic detectors 11a and 11a is arranged in each of three void parts, gap parts between magnetic path members 12 and 12 adjacent circumferentially. Three-phase single-end signals obtained by converting a pair of differential signals output from the pairs of two magnetic detectors 11a and 11a into single-end signals are used for the rotation information computation process. By adopting such a constitution, the problem is solved.;COPYRIGHT: (C)2010,JPO&INPIT