Curved magnets for a variable-flux memory motor
A multi-pole rotor of a variable-flux memory motor (VFMM) includes: a plurality of poles. Each pole includes: a curved soft magnet, wherein an outer periphery of the curved soft magnet is toward the rotational axis of the rotor; a first non-magnetic and non-conductive material disposed on the outer periphery of the curved soft magnet; and a second non-magnetic and non-conductive material disposed on an inner periphery of the curved soft magnet.
1. A multi-pole rotor of a variable-flux memory motor (VFMM), comprising:
a plurality of poles, each comprising:
a curved soft magnet, comprising:
a first curved soft magnet toward the inner periphery of the soft magnet; and
a second curved soft magnet toward the outer periphery of the soft magnet, wherein
an outer periphery of the curved soft magnet is toward the rotational axis of the rotor;
a first non-magnetic and non-conductive material disposed on the outer periphery of the curved soft magnet; and
a second non-magnetic and non-conductive material disposed on an inner periphery of the curved soft magnet.
2. The multi-pole rotor according to claim 1 , wherein a magnetic permeability of the first curved soft magnet is higher than a magnetic permeability of the second curved soft magnet.
3. The multi-pole rotor according to claim 1 , wherein the rotor does not include a hard magnet.
4. The multi-pole rotor according to claim 1 , wherein the soft magnet comprises a plurality of magnet segments disposed next to each other.
5. The multi-pole rotor according to claim 4 , wherein the magnet segments are disposed next to each other in a direction along the rotational axis of the rotor.
6. The multi-pole rotor according to claim 1 , wherein the thickness of the curved soft magnet is not uniform along the length of the magnet.
7. A variable-flux memory motor (VFMM) comprising the rotor of claim 1 .
8. A multi-pole rotor of a variable-flux memory motor (VFMM), comprising:
a plurality of poles, each comprising:
a soft magnet;
two high-permeable parts disposed on opposite sides of the soft magnet, wherein
the soft magnet and the two high-permeable parts create a curved part, and
an outer periphery of the curved part is toward the rotational axis of the rotor;
a first non-magnetic and non-conductive material disposed on the outer periphery of the curved part; and
a second non-magnetic and non-conductive material disposed on an inner periphery of curved part.
9. The multi-pole rotor according to claim 8 , wherein the rotor does not include a hard magnet.
10. The multi-pole rotor according to claim 8 , wherein the soft magnet comprises a plurality of magnet segments disposed next to each other.
11. The multi-pole rotor according to claim 10 , wherein the magnet segments are disposed next to each other in a direction along the rotational axis of the rotor.
12. The multi-pole rotor according to claim 8 , wherein the two high-permeable parts are M19.
13. A multi-pole rotor of a variable-flux memory motor (VFMM), comprising:
a plurality of poles, each comprising:
a soft magnet;
a high-permeable part disposed adjacent to the soft magnet, wherein
the soft magnet and the high-permeable part create a curved part,
an outer periphery of the curved part is toward the rotational axis of the rotor,
the soft magnet comprises a plurality of magnet segments, and
the high-permeable part is disposed next to more than one segment of the soft magnet.
14. The multi-pole rotor according to claim 13 , wherein the rotor does not include a hard magnet.
15. The multi-pole rotor according to claim 13 , wherein the plurality of magnet segments are disposed next to each other.
16. The multi-pole rotor according to claim 15 , wherein the magnet segments are disposed next to each other in a direction along the rotational axis of the rotor.
17. The multi-pole rotor according to claim 15 , wherein the rotor does not include a hard magnet.