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. 31, 2018
Filed:
May. 22, 2017
Rolls-royce Plc, London, GB;
ROLLS-ROYCE plc, London, GB;
Abstract
An electrical system including a three phase AC input supply and three or more H-bridge converter cells. Each H-bridge converter cell has: an active front end rectifier for receiving the three phase AC input supply and transforming it into a DC supply, thereby providing a rectifier current i; a capacitor suitable to receive a capacitor current i, the capacitor smoothing the DC supply; and an inverter suitable to receive an inverter current i, wherein i=i−i, said inverter transforming the received inverter current iinto a single phase AC supply. The system also including a control subsystem, which provides a signal to each active front end rectifier to vary its respective rectifier current isuch that the difference between the rectifier current i, provided by the active front end rectifier, and the inverter current i, received by the inverter, is substantially zero.