Synchronous motor with permanent magnets
AssigneeInfranor Holding SA
InventorsGiampiero Tassinario, Ivan Flotats, Francesc Cruellas
Life of this patent
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Abstract
A synchronous motor with permanent magnets includes a rotor (110) provided with permanent magnets, and a winding (120) formed by overlapping coils located inside a slotless stator (100). The winding coils (120) are regularly distributed all around the 360° of the inside surface of the stator (100) and the ends of the coils are designed such that the winding has the same thickness throughout and the ends of the winding are at least partially inside the slotless stator (100).
Claims7
A synchronous motor with permanent magnets comprising:
- a rotor configured to rotate along a rotation axis provided with permanent magnets;
- and
- a winding of overlapping coils located inside a slotless stator and comprising at least three electrical phases,
- wherein the coils of the winding are regularly distributed all around the 360° of the inside surface of the stator,
- wherein the coils of the winding comprise first portions having a substantially rectangular section and turn portions, the first portion extending between two opposite turn portions,
- wherein the dimensions of the rectangular section of each coil have a width “a” and a thickness “b”, such that the cross-sectional area of the rectangular section is equal to A, wherein A=‘b’בa’,
- wherein the turn portions comprise a thickness less than the thickness “b” in the first portions and a cross-sectional area equal to “A”,
- wherein the cross-sectional area A of the coils is constant,
- wherein the winding has the same radial thickness and a constant cross-section over its length,
- wherein only two ends of coils at the turn portions are crossed at a same location, and
- wherein the slotless stator extends over the crossing of the coils at ends of the coils.
An axial magnetic flux motor with permanent magnets disposed along a rotation axis, comprising:
- two flat annular stator parts forming a slotless stator;
- a disk shaped rotor provided with permanent magnets located inside the two flat annular stator parts;
- and
- two winding, each of which have overlapping coils, distributed around surfaces of the two flat annular stator parts proximal to the disk shape rotor comprising at least three electrical phases,
- wherein the coils of the windings comprise first portions having a substantially rectangular section and turn portions, the first portion extending between two opposite turn portions,
- wherein the dimensions of the rectangular section of each coil comprise a width “a” and a thickness “b”, such that the cross-sectional area of the rectangular section is equal to A, wherein A=‘b’בa’,
- wherein the turn portions comprise a thickness less than the thickness “b” in the first portions and a cross-sectional area equal to “A”,
- wherein the cross-sectional area A of the coils is constant,
- wherein the winding has the same axial thickness and a constant cross-section over its length, and
- wherein only two ends of coils at the turn portions are crossed at a same location, and
- wherein the slotless stator extends over the crossing of the coils at ends of the coils.
Dependencies are inferred from the claim text.