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. 13, 2021
Filed:
Sep. 13, 2019
Applicant:
Rolls-royce Plc, London, GB;
Inventors:
Assignee:
ROLLS-ROYCE plc, London, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02M 7/217 (2006.01); H02M 7/23 (2006.01); H02M 7/25 (2006.01);
U.S. Cl.
CPC ...
H02M 7/2173 (2013.01); H02M 7/23 (2013.01); H02M 7/25 (2013.01);
Abstract
An electrical converter () having an active diode-clamped multilevel topology is shown. Each clamping diode is connected in antiparallel with a switch (SA, SB). The converter comprises polyphase supply phases (A, B, C) each of which are connected via a respective phase leg () to dc rails () and a dc-link capacitor. The dc-link capacitor includes a plurality of series-connected capacitors (). A controller is configured to, in response to an event signal, for each phase leg, activate a combination of switches therein to form a pair of parallel conduction paths to a midpoint () between two capacitors in the dc-link capacitor, thereby connecting each phase to the same node.