HIGH POWER DENSITY PERMANENT MAGNET MACHINE

• US 20130300243A1
• Filed: 05/11/2012
• Published: 11/14/2013
• Est. Priority Date: 05/11/2012
• Status: Abandoned Application

• Current Assignee: Hamilton Sundstrand Corporation (Raytheon Technologies Corporation d/b/a RTX)
• Original Assignee: Hamilton Sundstrand Corporation (Raytheon Technologies Corporation d/b/a RTX)
• Inventors: Gieras, Jacek F., Rozman, Gregory I., Ribarov, Lubomir A.
• Application Number:
  US13/469,260
• Publication Number:
  US 20130300243A1
• Time in Patent Office: Days
• US Class Current: 310/156.43
• CPC Class Codes: H02K 21/046 with rotating permanent magnets and stationary field winding
• CPC Class Codes: H02K 21/18 having horse-shoe armature cores with homopolar co-operation H02K21/20

Abstract

A permanent magnet rotary machine includes a rotor and a plurality of circumferentially spaced permanent magnets spaced circumferentially about a rotational axis of the rotor. A stator is positioned adjacent the rotor, and includes a plurality of circumferentially spaced U-shaped cores. The U-shaped cores are provided with a separate coil. The cores are arranged such that at least three phases of electric power are created by three sets of the cores.

Claims

1. A permanent magnet rotary machine comprising:

a rotor including a plurality of permanent magnets spaced circumferentially about a rotational axis of the rotor; and

a stator positioned adjacent said rotor, said stator including a plurality of circumferentially spaced U-shaped cores, with each of said U-shaped cores provided with a separate coil, and said cores being arranged such that at least three phases of electric power are created by at least three sets of said cores.

2. The machine as set forth in claim 1, wherein said stator is positioned radially outwardly of said rotor.

3. The machine as set forth in claim 2, wherein each said U-shaped core includes coils on each of two legs extending radially toward said rotor from a central web of said core positioned radially outwardly of said two legs.

4. The machine as set forth in claim 2, wherein said U-shaped core includes a coil positioned about a web connecting two legs of said core, with said web positioned radially outward of said two legs.

5. The machine as set forth in claim 3, wherein a flux diverter is positioned radially inwardly of said web and connects said two legs, and a control coil is positioned about said flux diverter.

6. The machine as set forth in claim 5, wherein a control current to said control coil is controlled to change an overall flux provided between said rotor and said stator.

7. The machine as set forth in claim 1, wherein a flux diverter is positioned radially inwardly of a web that connects two legs to form said U-shaped cores, and a control coil is positioned about said flux diverter.

8. The machine as set forth in claim 7, wherein a control current to said control coil is controlled to change an overall flux provided between said rotor and said stator.

9. The machine as set forth in claim 1, wherein the number of permanent magnets on the rotor and the number of U-shaped stator cores is defined by the following relationship:

10. A permanent magnet rotary machine comprising:

a rotor including a plurality of permanent magnets spaced circumferentially about a rotational axis of the rotor; and

a stator positioned adjacent said rotor, said stator including a plurality of circumferentially spaced U-shaped cores, with each of said U-shaped cores provided with a separate coil, and said cores being arranged such that at least three phases of electric power are created by at least three sets of said cores;

said stator positioned radially outwardly of said rotor; and

the number of permanent magnets on the rotor and the number of U-shaped stator cores being defined by the following relationship;

11. The machine as set forth in claim 10, wherein each said U-shaped core includes coils on each of two legs extending radially toward said rotor from a central web of said core positioned radially outwardly of said two legs.

12. The machine as set forth in claim 10, wherein said U-shaped core includes a coil positioned about a web connecting two legs of said core, with said web positioned radially outward of said two legs.

13. The machine as set forth in claim 12, wherein a flux diverter is positioned radially inwardly of said web and connects said two legs, and a control coil is positioned about said flux diverter.

14. The machine as set forth in claim 13, wherein a control current to said control coil is controlled to change an overall flux provided between said rotor and said stator.

15. The machine as set forth in claim 10, wherein a flux diverter is positioned radially inwardly of a web that connects two legs to form said U-shaped cores, and a control coil is positioned about said flux diverter.

16. The machine as set forth in claim 15, wherein a control current to said control coil is controlled to change an overall flux provided between said rotor and said stator.