Magnetic particles or wires for electrical machinery

Patent metadata

Field	Value
Publication number	US-11739402-B2
Application number	US-202016952353-A
Country	US
Kind code	B2
Filing date	Nov 19, 2020
Priority date	Nov 19, 2019
Publication date	Aug 29, 2023
Grant date	Aug 29, 2023

Abstract

An electrical composite assembly includes a plurality of composite material macro-wires each including a magnetic material embedded within a nonmagnetic matrix. The magnetic material can be selected from magnetic microwires, magnetic nanowires, chains of magnetic nanoparticles, and chains of magnetic microparticles. The plurality of composite material macro-wires are included in an electrical component, where the electrical component is selected from a rotor, a stator, and an electromagnetic shield.

First claim

What is claimed is:

1. An electrical composite assembly comprising
an electrical component selected from a rotor, a stator, and an electromagnetic shield;
a plurality of composite material macro-wires included in the electrical component, the plurality of composite material macro-wires including a magnetic material embedded within and in contact with a nonmagnetic polymeric matrix, wherein the magnetic material is selected from the group consisting of magnetic microwires and magnetic nanowires, wherein respective ones of the plurality of composite material macro-wires are spaced as to have no electrical contact.

2. The electrical composite assembly of claim 1 , wherein the electrical component is the rotor or the stator.

3. The electrical composite assembly of claim 1 , wherein the electrical component is the electromagnetic shield.

4. The electrical composite assembly of claim 3 , wherein the electromagnetic shield is shaped as a disc.

5. The electrical composite assembly of claim 4 , wherein the disc has an outer radius of from 50 mm to 175 mm, and wherein the disc has a thickness of from 0.25 mm to 3 mm.

6. The electrical composite assembly of claim 5 , wherein the disc includes an inner hole which provides an inner radius of the disc, and wherein the inner radius is from 30 mm to 60 mm.

7. The electrical composite assembly of claim 1 , wherein the electrical component is the rotor or the stator, wherein the rotor or the stator provide a magnetic field having a dominant direction, and wherein the magnetic material is aligned in the dominant direction of the magnetic field in each region of the rotor or the stator.

8. The electrical composite assembly of claim 1 , wherein the nonmagnetic polymeric matrix is selected from the group consisting of polyimide, polyether imide, polyethylene naphthalate, poly(P-phenylene sulfide), polyaryletherketone, and thermotropic liquid crystal polymers.

9. The electrical composite assembly of claim 1 , wherein the magnetic material has a magnetic relative permeability (μ) of at least 500.

10. The electrical composite assembly of claim 1 , wherein the magnetic material is the magnetic microwires.

11. The electrical composite assembly of claim 1 , wherein the magnetic material is the magnetic nanowires.

12. The electrical composite assembly of claim 1 , wherein the magnetic material includes at least 40 wt. % iron.

13. The electrical composite assembly of claim 12 , wherein the magnetic material further includes nickel and cobalt.

14. The electrical composite assembly of claim 13 , wherein the magnetic material includes from 25 wt. % to 35 wt. % of the nickel.

15. The electrical composite assembly of claim 13 , wherein the magnetic material includes from 15 wt. % to 25 wt. % of the cobalt.

16. The electrical composite assembly of claim 1 , wherein components of the magnetic material have an average diameter, wherein the components have an inter-distance between the components of from 0.75× the average diameter to 2.0× the average diameter.

17. The electrical composite assembly of claim 1 , wherein the electrical component is the rotor or the stator, and wherein the rotor or the stator are part of a synchronous reluctance machine.

Assignees

• Sozer Yilmaz
• Tsukerman Igor
• Univ Akron

Inventors

• Sozer Yilmaz
• Tsukerman Igor

Classifications

• C22C38/105 Primary

  containing Co and Ni · CPC title

• B22F1/0547

  Nanofibres or nanotubes · CPC title

• H01F1/0081

  in a non-magnetic matrix, e.g. Fe-nanowires in a nanoporous membrane · CPC title

• H01F1/12

  of soft-magnetic materials · CPC title

• H01F1/26

  by macromolecular organic substances · CPC title