公开(公告)号：US11646579B2

公开(公告)日：2023-05-09

申请号：US17001990

申请日：2020-08-25

Applicant: ROLLS-ROYCE plc

Inventor： Stephen M Husband ,  Jeffrey Hobday ,  Graham P Bruce ,  David F Brookes

IPC: B64D35/02 ,  H02K7/18 ,  H02M7/04 ,  F02C7/36 ,  H02J1/10 ,  F02C6/20 ,  F01D15/10

CPC classification number: H02J1/102 ,  B64D35/02 ,  F02C7/36 ,  H02K7/1823 ,  B64D2221/00 ,  F01D15/10 ,  F02C6/206 ,  F05D2220/76 ,  Y02T50/50 ,  Y02T50/60

Abstract: Electrical systems for connecting rotary electric machines with gas turbine spools are provided. One such electrical system includes: a first rotary electric machine; a second rotary electric machine; a first set of bidirectional converter circuits; a second set of bidirectional converter circuits; and DC outputs for connection with an R-channel network. Each electrical machine is mechanically coupled with a respective gas turbine spool and has an identical even number N≥4 of phases, each phase having a respective index and including an identical number P≥1 of coils wound in a P-plex configuration in which adjacent phases are radially separated by 2π/NP mechanical radians. Each of the first and second converter circuits converts AC to and from DC, has a respective index n, and is connected with the P coils in the nth phase of the first and second rotary electric machines, respectively.

公开(公告)号：US11611256B2

公开(公告)日：2023-03-21

申请号：US17572242

申请日：2022-01-10

Applicant: ROLLS-ROYCE plc

Inventor： Stephen M. Husband ,  Jeffrey Hobday

IPC: H02K3/28 ,  H02K3/42 ,  H02K7/18 ,  H02P25/22 ,  H02K21/48 ,  H02K21/16 ,  H02K9/197 ,  H02K3/24

Abstract: Fault-tolerant electric drive systems including a machine having a rotor and a stator having coils arranged in pairs. Each coil in each pair separated by 180 degrees, a first phase (ϕA) having one of the coil pairs and a phase drive circuit connected therewith, a second phase (ϕB) having a second one of the coil pairs and a second phase drive circuit connected therewith, a third phase (ϕC) having a third one of the coil pairs and a third phase drive circuit connected therewith, and a fourth phase having a fourth one of the coil pairs and a fourth phase drive circuit connected therewith. Further included is a controller connected with the first, second, third and fourth phase drive circuits to control operation thereof.

公开(公告)号：US11258324B2

公开(公告)日：2022-02-22

申请号：US17007436

申请日：2020-08-31

Applicant: ROLLS-ROYCE plc

Inventor： Stephen M. Husband ,  Jeffrey Hobday

IPC: H02K3/28 ,  H02K3/42 ,  H02K7/18 ,  H02P25/22 ,  H02K21/48 ,  H02K21/16 ,  H02K3/24

Abstract: Fault-tolerant four-phase electric drive systems are provided. One such system comprises: a rotary electric machine having a permanent magnet rotor and an alternate-wound stator having eight evenly-spaced coils arranged in pairs, each coil in each pair being separated by 180 degrees; a first phase (ΦA) comprising a first one of the coil pairs and a first phase drive circuit connected therewith; a second phase (ΦB) separated by +45 degrees from the first phase and comprising a second one of the coil pairs and a second phase drive circuit connected therewith; a third phase (ΦC) separated by +90 degrees from the first phase and comprising a third one of the coil pairs and a third phase drive circuit connected therewith; a fourth phase (ΦD) separated by +135 degrees from the first phase and comprising a fourth one of the coil pairs and a fourth phase drive circuit connected therewith; and a controller connected with the first, second, third and fourth phase drive circuits to control operation thereof.