公开(公告)号：US11804762B2

公开(公告)日：2023-10-31

申请号：US18100970

申请日：2023-01-24

Applicant: MAERSK DRILLING A/S

Inventor： John Røn Pedersen ,  Martin Speiermann ,  Jamshid Zamany

IPC: H02K21/22 ,  H02K11/21 ,  H02K7/09

CPC classification number: H02K21/222 ,  H02K7/09 ,  H02K11/21

Abstract: A flywheel system includes a fixture providing a base and a stator, rotor having a cavity to receive the stator, a generator/motor module having a plurality of permanent magnets mechanically coupled to the rotor and an active magnetic bearing module. The active magnetic bearing module includes a plurality of magnetizable elements mechanically coupled to or integrated in the rotor, and a plurality of electromagnets mechanically coupled to a shaft and configured to magnetically couple with the plurality of first magnetizable elements to actively stabilize the rotor relative to the fixture. The windings of the generator/motor module are arranged around the rotation axis of the rotor at a first distance from the rotation axis of the rotor, the electromagnets of the active magnetic bearing module are arranged around the rotation axis of the rotor at a second distance, and the first distance is greater than or equal to the second distance.

公开(公告)号：US11264876B2

公开(公告)日：2022-03-01

申请号：US16758298

申请日：2018-10-22

Applicant: MAERSK DRILLING A/S

Inventor： John Røn Pedersen ,  Martin Speiermann ,  Jamshid Zamany

IPC: H02K21/22 ,  H02K11/21 ,  H02K7/09

Abstract: A flywheel system includes a rotor configured to rotate about a rotation axis. The flywheel system further includes a fixture and an active magnetic bearing module for actively stabilizing the rotor relative to the fixture. The active magnetic bearing module includes a plurality of first magnetizable elements mechanically coupled to or integrated in the rotor, and a plurality of electromagnets mechanically coupled to the fixture and configured to magnetically couple with the plurality of first magnetizable elements to actively stabilize the rotor relative to the fixture. Each of the first magnetizable elements is farther than each of the electromagnets from the rotation axis.