公开(公告)号：US11811283B2

公开(公告)日：2023-11-07

申请号：US17007338

申请日：2020-08-31

Applicant: ROLLS-ROYCE plc

Inventor： David F. Brookes

IPC: H02K3/28 ,  H02K1/16 ,  H02K3/14 ,  H02K3/24 ,  H02K3/42 ,  H02K3/493 ,  H02K15/00 ,  H02K15/02 ,  H02K15/085 ,  H02K15/12 ,  H02K21/14 ,  H02K7/18 ,  H02K9/197

CPC classification number: H02K3/28 ,  H02K1/165 ,  H02K3/14 ,  H02K3/24 ,  H02K3/42 ,  H02K3/493 ,  H02K7/1823 ,  H02K9/197 ,  H02K15/0018 ,  H02K15/024 ,  H02K15/085 ,  H02K15/12 ,  H02K21/14 ,  H02K2213/06

Abstract: A stator for a radial-flux rotary electric machine includes a yoke with a plurality of teeth, each tooth extending from a root at the yoke to a tip. The stator further includes a plurality of coils, each one of which being located on a respective one of the plurality of teeth, the coils being sized such that a slot fill factor is between zero and unity to define axial voids in the slots. The stator further includes a plurality of magnetic sealing members, each one of which being engaged with the tips of adjacent teeth to circumferentially and axially seal the axial voids in the slots for retaining an axial flow of coolant therein, the magnetic sealing members being composed of a magnetic material to provide a flux path between adjacent tooth tips to increase an amount of leakage flux.

公开(公告)号：US20210172334A1

公开(公告)日：2021-06-10

申请号：US17108509

申请日：2020-12-01

Applicant: ROLLS-ROYCE plc

Inventor： David F. Brookes

IPC: F01D15/10 ,  H02K7/18

Abstract: A gas turbine engine having first and second rotary electric machines mechanically coupled with a spool is provided. The first rotary electric machine is mechanically coupled with the spool and has connected therewith a first power converter to interface the electric machine with a first dc network operating at a first voltage. The second rotary electric machine is mechanically coupled with the spool and has connected therewith a second power converter to interface the electric machine with a second dc network operating at a second voltage greater than said first voltage. The first electric machine and the second electric machine are operable as a motor-generator set for transfer of electrical power to the first dc network from the second dc network.