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:
Sep. 03, 2013
Filed:
Jan. 16, 2009
Kenta Hatano, Tokyo, JP;
Toshiyuki Umemoto, Tokyo, JP;
Naoki Miyamoto, Tokyo, JP;
Satoshi Fujimura, Tokyo, JP;
Kenta Hatano, Tokyo, JP;
Toshiyuki Umemoto, Tokyo, JP;
Naoki Miyamoto, Tokyo, JP;
Satoshi Fujimura, Tokyo, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
A brushless motor position detection device has a set of first Hall elements (main Hall ICsfor detecting magnetic pole positions) and a set of second Hall elements (sub-Hall ICsfor detecting magnetic pole positions) mounted on a plane facing a magnetic pole position detecting magnetfor detecting the position of a rotor. They are subjected to offset adjustment and are mounted in such a manner that the difference between the maximum value of the magnetic flux density at the mounting positions of the first Hall elements and the maximum value of the magnetic flux density at the mounting positions of the second Hall elements is held within a prescribed limit (mounted in such a manner as to have the offset of a prescribed machine angle in the circumferential direction) to bring the detection accuracy of the plurality of sets of the Hall elements into agreement.