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:
Sep. 06, 2016
Filed:
Jun. 13, 2014
Applicant:
Dyson Technology Limited, Wiltshire, GB;
Inventors:
Assignee:
Dyson Technology Limited, Malmesbury, Wiltshire, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01R 39/46 (2006.01); H02P 6/14 (2016.01); H02P 29/00 (2016.01);
U.S. Cl.
CPC ...
H02P 6/147 (2013.01); H02P 6/157 (2016.02); H02P 29/0005 (2013.01);
Abstract
A method of controlling a brushless permanent-magnet motor. The method includes commutating a winding of the motor at times relative to zero-crossings of back EMF in the winding. Commutation is then advanced when the motor operates over a first speed range, and commutation is retarded when the motor operates over a second speed range higher than that of the first speed range.