Topologies to reduce force ripple for propulsion motors
AssigneeHyperloop Technologies, Inc.
InventorsJu Hyung KIM, Yingjie LI, Alexander JEDINGER, Rachel OZER
Life of this patent
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Abstract
Various topologies to reduce force ripple for propulsion motors are provided. A propulsion motor comprises: ferro-magnetic cores arranged along a movement axis, the ferromagnetic cores including one or more end ferromagnetic cores located at an end of the movement axis, the one or more end ferromagnetic cores shaped to provide one or more of increasing magnetic permeance or decreasing magnetic reluctance from the end of the movement axis towards a center of the movement axis; armature coils located around the ferromagnetic cores; and at least one field coil around one or more of the armature coils and the ferromagnetic cores.
Claims16
A propulsion motor comprising:
- ferromagnetic cores arranged along a movement axis, the ferromagnetic cores including one or more end ferromagnetic cores located at an end of the movement axis, the one or more end ferromagnetic cores shaped to provide one or more of increasing magnetic permeance or decreasing magnetic reluctance from the end of the movement axis towards a center of the movement axis;
- armature coils located around the ferromagnetic cores;
- and
- at least one field coil around one or more of the armature coils and the ferromagnetic cores.
A track for a propulsion motor, the track comprising:
- a plurality of track segments relative to which the propulsion motor is propelled by the plurality of track segments acting as a rotor component of a magnetic machine and the propulsion motor acting as a stator component of the magnetic machine, the plurality of track segments and the propulsion motor, together forming a homopolar linear synchronous machine,
- wherein a ratio of a width of a track segment along the track, to a half of track pitch of the track, is about 0.7.
Dependencies are inferred from the claim text.