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:
Jan. 03, 1978
Filed:
Sep. 30, 1976
Saburo Takaoka, Tokyo, JA;
Norikazu Fujie, Tokyo, JA;
Pioneer Electronic Corporation, Tokyo, JA;
Abstract
A brushless d.c. motor includes a plurality of Hall elements 1-3 for detecting the relative positions of the rotor and stator poles, a comparator circuit 103 responsive to a bipolar input control signal A for generating an output signal B proportional to the absolute magnitude of signal A and an output signal D as a function of the polarity of signal A, a timing signal generator 104 for generating output signals E timed in relation to the Hall element outputs F and having a phase sequence in response to signal D, and a reversible current supply circuit 105 for driving a set of Y-connected stator windings 101 with currents C having a magnitude proportional to signal B and a phase sequence in accordance with signal E.