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:
Aug. 18, 2009
Filed:
Nov. 27, 2006
Shingo Nakanishi, Obu, JP;
Masahiro Kako, Toyota, JP;
Shingo Nakanishi, Obu, JP;
Masahiro Kako, Toyota, JP;
Aisan Kogyo Kabushiki Kaisha, Obu, JP;
Abstract
A brushless motor controller for use in a fuel pump detects a rotor phase based on an induced voltage in each phase coil of a brushless motor, and controls energization of the each phase coil based on the detected rotor phase. A control circuit of the controller is arranged to check the induced voltage by using three reference voltages as judgment values, convert a result of the check into a logic signal, and detect the rotor phase based on a prescribed change of the logic signal.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile