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:
Jul. 23, 2019
Filed:
May. 19, 2017
Applicant:
Ultra Electronics Limited, Greenford, Middlesex, GB;
Inventor:
Andrew Ceri Davis, Cheltenham, GB;
Assignee:
Ultra Electronics Limited, Middlesex, GB;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H02P 6/18 (2016.01); H03H 17/02 (2006.01); H02P 6/15 (2016.01); H03H 17/00 (2006.01); H02P 7/03 (2016.01);
U.S. Cl.
CPC ...
H03H 17/0294 (2013.01); H02P 6/153 (2016.02); H02P 6/18 (2013.01); H03H 17/0018 (2013.01); H02P 7/05 (2016.02); H03H 2017/0297 (2013.01);
Abstract
A filter for use with a brushless DC motor to filter a signal received from a floating terminal of the brushless DC motor, wherein the filter is configured such that a time delay introduced by the filter to the signal received from the floating terminal is equal to the time taken for a rotor of the motor to rotate through an angle equal to half of a commutation step of the motor.