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:
May. 06, 2014
Filed:
Dec. 01, 2009
Hidehisa Tanaka, Shiga, JP;
Yoshinori Takeoka, Shiga, JP;
Hidehisa Tanaka, Shiga, JP;
Yoshinori Takeoka, Shiga, JP;
Panasonic Corporation, Osaka, JP;
Abstract
Phase correction unit () for outputting a commutation signal for switching a winding that allows a current to flow to brushless DC motor () and drive unit () for outputting a drive signal indicating supplying timing of electric power supplied to brushless DC motor () by inverter () based on the commutation signal output from phase correction unit () are provided so as to maintain a predetermined relation between a phase of a current flowing to a predetermined winding of brushless DC motor () and a phase of a voltage. Since brushless DC motor () is driven by a signal for holding the predetermined relation between the phase of the current and the phase of the voltage, the stability of drive under high-speed and high-load conditions is enhanced and a drive range is extended.