公开(公告)号：US12101007B2

公开(公告)日：2024-09-24

申请号：US18385750

申请日：2023-10-31

Applicant: WattsUp Power A/S

Inventor： John Røn Pedersen ,  Martin Speiermann ,  Jamshid Zamany

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

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：US12098748B2

公开(公告)日：2024-09-24

申请号：US17287961

申请日：2019-10-22

Applicant: WATTSUP POWER A/S

Inventor： Martin Speiermann ,  Christian Bahl ,  Kaspar K. Nielsen ,  Rasmus Bjørk ,  Valère Combescot ,  Jacopo Granata

IPC: H02K7/09 ,  F16C32/04 ,  H02K7/02

CPC classification number: F16C32/0493 ,  F16C2361/55 ,  F16C2380/28

Abstract: A flywheel system includes a fixture including a bottom support, a rotor characterized by a gravitational load and configured to rotate above the bottom support about a rotation axis, and a bottom magnetic levitation bearing. The bottom magnetic levitation bearing includes (a) a ring of first magnets mechanically coupled with a bottom end of the rotor, (b) a ring of second magnets mechanically coupled to the bottom support, beneath the ring of first magnets, the second magnets repelling the first magnets to magnetically support at least a portion of the gravitational load above the bottom support, (c) a ring of third magnets mechanically coupled with the bottom end, and (d) a ring of fourth magnets mechanically coupled to the bottom support radially outwards from the ring of third magnets, the fourth magnets repelling the third magnets to at least reduce radial decentering of the rotor relative to the fixture.