公开(公告)号：US10797574B2

公开(公告)日：2020-10-06

申请号：US15990391

申请日：2018-05-25

Applicant: ROLLS-ROYCE plc

Inventor： Simon Turvey ,  Keir Wilkie

IPC: H02P9/00 ,  H02K21/02 ,  F02C7/268 ,  H02K1/27 ,  H02K7/116 ,  H02K7/18 ,  H02K11/04 ,  H02K16/02 ,  H02P27/08 ,  F02C7/32

Abstract: An electrical machine has a stator with windings, first and second rotors, and an electrical output regulator. The first rotor carries alternating polarity first field magnets, such that, on drive mechanism rotation, the windings interact with the magnetic flux produced by the first magnets to create an EMF. The second rotor carries alternating polarity second field magnets, and has first and second rotational positions to reduce and increase, respectively, the magnetic flux energy. The electrical output regulator regulates a current from the windings to produce a torque on the rotors, as the drive mechanism increases from zero rotational speed, the torque rises above a threshold level that moves the second rotor from the first to the second rotational position, and, as the drive mechanism further increases the rotational speed, the torque peaks and then drops below the threshold level to move the second rotor back to the first rotational position.

公开(公告)号：US11496010B2

公开(公告)日：2022-11-08

申请号：US17007257

申请日：2020-08-31

Applicant: ROLLS-ROYCE plc

Inventor： Simon Turvey

IPC: H02K3/28 ,  H02K1/16 ,  H02K3/14 ,  H02K3/24 ,  H02K3/42 ,  H02K7/18 ,  H02K9/19 ,  H02K21/14 ,  H02K3/493 ,  F01D15/10

Abstract: Fault-tolerant radial flux rotary electric machines are provided. One such machine comprises: a permanent magnet rotor having fourteen poles; and an alternate-wound stator having sixteen slots and four coil pairs, each coil pair forming part of one of four independent electrical phases.

公开(公告)号：US10516357B2

公开(公告)日：2019-12-24

申请号：US15543195

申请日：2016-01-13

Applicant: ROLLS-ROYCE plc

Inventor： Simon Turvey

IPC: H02P9/00 ,  H02K19/20

Abstract: A switched reluctance generator and devices and methods for its control are concerned with generators and controls which can operate in an aerospace environment. The generator may have: a rotor having rotor poles; a stator having stator poles; and a controller. Either the rotor or stator poles each have windings to which current can be supplied to energise the poles and from which current can be drawn to a load; and the controller is arranged to: periodically excite each of the windings in turn to a pre-determined level of current; measure the current generated in each winding; cease the excitation when the current generated in each winding exceeds the excitation current; and direct the generated current in each winding to the load. The generator may thereby avoid the need to determine the position of the rotor poles relative to the stator poles to provide the commutation of the generator.

公开(公告)号：US10033378B2

公开(公告)日：2018-07-24

申请号：US15279218

申请日：2016-09-28

Applicant: ROLLS-ROYCE PLC

Inventor： Simon Turvey

IPC: H03K3/00 ,  H03K17/567 ,  H02M3/07 ,  H03K5/08

Abstract: A solid state power control apparatus includes: (a) at least one IGBT and at least one FET, for supplying current to a load, and (b) a current controller for shutting off the IGBT and FET. The current controller is arranged to start shut off of the IGBT before it starts shut off of the FET. Further, the current controller is arranged to reduce current flow prior to start of the turn off of the IGBT and FET.