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:
Apr. 12, 2016
Filed:
Oct. 11, 2011
Applicant:
John Pike, Aberdeen, GB;
Inventor:
John Pike, Aberdeen, GB;
Assignee:
Sondex Limited, Hampshire, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01V 3/00 (2006.01); H02P 6/18 (2006.01); H02P 6/12 (2006.01);
U.S. Cl.
CPC ...
H02P 6/182 (2013.01); H02P 6/12 (2013.01);
Abstract
An electric motor assembly, mud pulser and a method for transmitting data. The electric motor assembly includes an electric motor having a rotor and a stator that includes one or more windings; one or more sensors on the stator and configured to determine an angular position of the rotor; and a motor control circuitry configured to control a commutation of the electric motor based on signals received from the one or more sensors. The motor control circuitry is configured to determine a total angular rotation of the rotor based on a back emf voltage of the one or more windings and independent of the signals from the one or more sensors.