公开(公告)号：US20240313622A1

公开(公告)日：2024-09-19

申请号：US18589701

申请日：2024-02-28

Applicant: ROLLS-ROYCE PLC

Inventor： Seamus D. GARVEY ,  Karuna KALITA

IPC: H02K11/30 ,  F02C6/20 ,  F02C7/268 ,  H02K1/14 ,  H02K7/18

CPC classification number: H02K11/30 ,  F02C6/20 ,  F02C7/268 ,  H02K1/146 ,  H02K7/1823

Abstract: An electric machine includes a stator having a phase arrangement, and a rotor. The phase arrangement includes first and second legs connected in parallel at first and second primary junctions. The legs each include first and second coils connected in series through a first intermediate junction. The intermediate junctions are connected by a branch such that the phase arrangement is a bridge circuit. The phase arrangement permits an alignment current to flow between the primary junctions via the branch, the alignment current being conducted through an alignment current path passing through one coil of each leg. The phase arrangement includes a negative impedance converter to add a negative electrical impedance to the alignment current path by introducing additional electrical energy into the respective alignment current path. The alignment current causes a translational force to be applied to the rotor for maintaining alignment of the rotor with respect to the stator.

公开(公告)号：US20240313589A1

公开(公告)日：2024-09-19

申请号：US18589674

申请日：2024-02-28

Applicant: ROLLS-ROYCE PLC

Inventor： Seamus D. GARVEY ,  Mark J. BODEN ,  Sophoclis PATSIAS

IPC: H02K1/14 ,  F02C6/20 ,  F02C7/268 ,  H02K7/18 ,  H02K11/21 ,  H02K11/30

CPC classification number: H02K1/146 ,  F02C6/20 ,  F02C7/268 ,  H02K7/1823 ,  H02K11/21 ,  H02K11/30

Abstract: An electric machine includes a stator having a phase arrangement, and a rotor. The phase arrangement includes legs connected in parallel at first and second primary junctions. Each leg includes a plurality of coils connected in series through a respective intermediate junction. Each leg is connected to at least one other leg by a branch at the respective intermediate junctions such that the phase arrangement is a bridge circuit. The phase arrangement conducts a motor current through the respective coils between the first and second primary junctions. The phase arrangement permits an alignment current to flow between the first and second primary junctions along an alignment current path which passes through at least one coil of two different legs via a respective branch. The motor currents cause a torque to be applied to the rotor, and the alignment current causes a translational force to be applied to the rotor.