Rolls-royce Corporation

Ellis Fh Chong

David Reginald Trainer

Francisco Javier Chivite Zabalza

Geraint Wun Jewell

John Edward Anthony

Zhigang Sun

Adegoke Gbadeyan

Stephen Williamson

Fermin Moliner-Cantos

Konstantinos Kampisios

Shangjian Dai

Alexander C Smith

Jiabin Wang

Andrew Mackay

Maurice Shortte

Edward Adams

Benjamin Palethorpe

Sivakumar Nadarajan

Shuai Wang

Vaiyapuri Viswanathan

Shanmukha Ramakrishna

Kin Hey Chu

King Jet Tseng

John Cullen

Adam Mcloughlin

Andrew Hartley

The disclosure relates to an electrical power system for connecting an electrical machine to first and second DC networks operating at different voltages. Example embodiments include an electrical power system comprising: an electrical machine having first and second pluralities of windings; a first AC:DC power electronics converter connected to the first plurality of windings; a second AC:DC power electronics converter connected to the second plurality of windings; a switching controller configured to provide switching signals to the first and second AC:DC power electronics converters to provide a first DC supply at a DC side of the first AC:DC power electronics converter and a second DC supply at a DC side of the second AC:DC power electronics converter.

Electrical power system

A method of controlling a permanent magnet synchronous electric machine (PMSM) drive using a Deadbeat Predictive Current Control (DBPCC) scheme is provided. The method comprises: determining d-axis and q-axis stator current values (i, i) representative of a measured PMSM current; determining d-axis and q-axis reference current values (i*, i*); based on the stator current values (i, i) and the reference current values (i*, i*), determining d-axis and q-axis current correction values (C, C); determining corrected reference current values (i**, i**) as a sum of the reference current values (i*, i*) and the current correction values (C, C); and controlling the PMSM drive using the corrected reference current values (i**, i**) as reference current inputs of the DBPCC scheme. A controller for performing the method; a system comprising the controller, a PMSM and associated power electronics; and a computer program for performing the method are also provided.

Permanent magnet electric machine control

This invention relates to a magnetic gearbox, comprising: an inner rotor having a first plurality of magnetic flux sources; an outer rotor having a second plurality of magnetic flux sources; and, a modulator having a plurality of pole pieces positioned between the first and second magnetic flux sources and separated from each by an air gap, wherein upon relative rotation of the inner rotor, outer rotor and modulator the first and second magnetic flux sources and pole pieces are arranged to provide a modulated magnetic field in the air gap adjacent each rotor; wherein either or both of the modulator and inner rotor include at least one nozzle for directing fluid radially across the respective air gap so as to impinge on the adjacent rotor or modulator.

Cooling arrangement for a magnetic gearbox

Growing community of inventors

Derby, United Kingdom

Ellis Fh Chong