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:
Jun. 09, 2026
Filed:
Jun. 25, 2024
Hitachi Energy Ltd, Zürich, CH;
HITACHI ENERGY LTD, Zurich, CH;
Abstract
The present application relates to a method for controlling operation of a cell arranged in an arm of a voltage source converter, said arm being associated with a current phase in said voltage source converter. The cell may be a half-bridge or full-bridge cell. The method may comprise: upon detection of a predetermined fault type in the cell, depending on an average current in said arm during one period of fundamental frequency and on an operation mode of the voltage source converter, injecting a pre-defined circulating current into said arm; detecting a time period during which the arm current is in a negative arm current direction corresponding to a direction when arm current flows via a diode of a switch connected in parallel to a bypass switch, and controlling the bypass switch such that it closes within said time period. A control unit and voltage source converter are also provided.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile