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:
Oct. 27, 2009
Filed:
May. 23, 2006
Kazutaka Sugimoto, Sakura, JP;
Yoshikazu Ito, Sakura, JP;
Tomokazu Murakami, Ueda, JP;
Shinano Kenshi Kabushiki Kaisha, Ueda-Shi, Nagano, JP;
Yachiyo Kogyo Kabushiki Kaisha, Sayama-Shi, Saitama, JP;
Abstract
The open/close body drive device is capable of restarting a brushless motor, without using magnetic pole sensors, so as to securely drive an open/close body in an arbitrary direction when any of the magnetic pole sensors has failed. When a CPU () detects an abnormal logic as a detection pattern of the magnetic pole sensors (), the CPU () determines that the sensor has failed and temporarily stops drive of a DC brushless motor (), and a motor drive unit () generates a phase switching signal to prolong one of electric connection patterns for performing sensorless drive when restarting the DC brushless motor ().