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. 23, 2014
Filed:
Sep. 30, 2011
Applicants:
Mark Edward Leaver, Malmesbury, GB;
Yu Chen, Malmesbury, GB;
Tuncay Celik, Malmesbury, GB;
Inventors:
Assignee:
Dyson Technology Limited, Malmesbury, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02P 1/46 (2006.01); H02P 6/00 (2006.01); H02P 6/14 (2006.01); H02P 23/00 (2006.01);
U.S. Cl.
CPC ...
H02P 23/0081 (2013.01); H02P 6/008 (2013.01); H02P 6/142 (2013.01);
Abstract
A method of controlling an electrical machine that includes exciting a phase winding with a supply voltage, and freewheeling the phase winding when current in the phase winding exceeds a threshold. The threshold is then adjusted in response to changes in the supply voltage and/or the speed of the electrical machine. Additionally, a control system that implements the method and an electrical machine comprising the control system are described.