The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 12, 2018
Filed:
Jan. 31, 2014
Murata Machinery, Ltd., Kyoto-shi, Kyoto, JP;
Tetsuya Shimizu, Kyoto, JP;
Satoshi Hanaka, Kyoto, JP;
Tatsuo Ota, Kyoto, JP;
Shogo Terada, Kyoto, JP;
Murata Machinery, Ltd., , JP;
Abstract
The present invention enables to obtain an approximate position of a zero crossing point in a shorter time period. A magnetic position sensor detects, with an array in which multiple magnetic detection elements are arranged in a straight line, the zero crossing point at which the magnetic flux density from a pair of magnetic poles is zero in a plane perpendicular to the longitudinal direction of the array. The magnetic detection elements are elements whose output changes in polarity when the direction of the magnetic flux density is inverted, and detect an approximate position of the zero crossing point by reading an output of every k-th magnetic detection element of the array (where k is an integer of 2 or greater). Then, the position of the zero crossing point is detected according to outputs of at least two magnetic detection elements on both sides of the zero crossing point.