Granted Patent B2

US 7,646,130 · App. 11/380,343 · Granted Jan 12, 2010

Abstract

Claims (27)

1. A stator assembly for an electric motor having a longitudinal axis, the stator assembly comprising:

at least one stator segment having:

a first end member having a stator tooth and at least one of a stator shoe and a back iron;

a second end member positioned with respect to said first end member and having a stator tooth and at least one of a stator shoe and a back iron;

a winding generally circumscribing said stator tooth of said first end member and said stator tooth of said second end member;

at least one intermediate member disposed between said first and second end members such that said first and second end members do not abut one another; wherein said at least one intermediate member extends generally circumferentially about the longitudinal axis of the motor and beyond the first and second end members; and

wherein said first and second end members face each other along a parting line generally perpendicular to the longitudinal axis of the motor.

2. The stator assembly of claim 1 , wherein at least one of said first and second end members are formed from one of pressed powdered iron and pressed flaked iron.

3. The stator assembly of claim 1 , wherein said at least one intermediate member is formed from laminated steel.

4. The stator assembly of claim 1 , wherein said at least one intermediate member is formed from one of pressed powdered iron and pressed flaked iron.

5. The stator assembly of claim 1 , wherein said first and second end members each have said stator shoe and said back iron.

6. The stator assembly of claim 1 , wherein said first end member and said second end member are substantially similar.

7. An electric motor having a longitudinal axis, the electric motor comprising:

a housing;

a rotor rotatably disposed with respect to said housing;

a generally annular stator assembly mounted with respect to said housing and coaxially disposed with respect to said rotor;

wherein said stator assembly includes at least one stator segment having:

a first end member having a stator tooth, a stator shoe, and a back iron;

a second end member positioned with respect to said first end member and having a stator tooth, a stator shoe, and a back iron;

a winding generally circumscribing said stator tooth of said first end member and said stator tooth of said second end member;

wherein said first and second end members face each other along a parting line generally perpendicular to the longitudinal axis of the motor; and wherein said back iron of said first and second end members defines an orifice in which said stator tooth of said first and second end members is received.

8. The electric motor of claim 7 , further comprising at least one intermediate member disposed between said first and second end members.

9. The electric motor of claim 8 , wherein at least one of said first and second end members are formed from one of pressed powdered iron and pressed flaked iron.

10. The electric motor of claim 8 , wherein said at least one intermediate member is formed from laminated steel.

11. The electric motor of claim 8 , wherein said at least one intermediate member extends in a generally circumferential direction about the longitudinal axis of the motor beyond said first and second end members.

12. The electric motor of claim 8 , wherein said at least one intermediate member is formed from one of pressed powdered iron and pressed flaked iron.

13. The electric motor of claim 7 , wherein said first end member and said second end member are substantially similar.

Assignments (13)