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. 13, 2006
Filed:
Oct. 08, 2004
Maki Murakami, Soraku-gun, JP;
Maki Murakami, Soraku-gun, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A position detection sectionoutputs a position signalindicating the relative position between motor windings Lto Land a rotorA crossing detection sectionoutputs a rotation signalindicating the magnitude relation between the position signaland a reference signalAn energization control signal generation sectiongenerates, based on the rotation signalenergization control signalsfor the motor windings Lto LAn edge signalis outputted when the magnitude relation of the two signals is reversed, and a mask signalis outputted over a predetermined period of time from when the edge signalis outputted. While the mask signalis being outputted, the crossing detection sectioncontinuously outputs, as the rotation signala comparison result signalwhich had been inputted before the mask signalwas outputted.