Rotary electric machine having a stator made up of sectors assembled together

• US 20020163278A1
• Filed: 04/05/2002
• Published: 11/07/2002
• Est. Priority Date: 04/17/2001
• Status: Active Grant

• Current Assignee: Moteurs Leroy Somer (Emerson Electric Company)
• Original Assignee: Moteurs Leroy Somer (Emerson Electric Company)
• Inventors: Gauthier, Pascal, Saint-Michel, Jacques, Coupart, Eric, Gilles, Christophe
• Granted Patent: US 6,975,057 B2
• Time in Patent Office: Days
• US Class Current: 310/216
• CPC Class Codes: H02K 1/141 consisting of C-shaped cores
• CPC Class Codes: H02K 1/185 to outer stators
• CPC Class Codes: H02K 11/21 Devices for sensing speed or position, or actuated thereby specially adapted for machines having non-mechanical commutating devices H02K29/06, H02K29/14
• CPC Class Codes: H02K 11/25 Devices for sensing temperature, or actuated thereby

Abstract

The invention relates to a rotary electric machine including a stator, powered by a polyphase current, having a magnetic circuit with teeth forming intervening slots for receiving electrical conductors. The magnetic circuit is made up of an assembly of sectors defining air-gaps intersecting the teeth at half-width.

Claims

1. / A rotary electric machine including a stator, powered by a polyphase current, having a magnetic circuit with teeth forming intervening slots for receiving electrical conductors, wherein said magnetic circuit comprises an assembly of sectors defining air-gaps intersecting said teeth at half-width.

2. / A machine according to claim 1, wherein said sectors each have portions in relief that are capable of co-operating with complementary portions in relief of adjacent sectors.

3. / A machine according to claim 1, wherein said magnetic circuit of said stator is inserted by force into a cylindrical case which induces radial compression forces on said sectors in order to hold them together.

4. / A machine according to claim 1, wherein said stator receives an individual coil on each tooth.

5. / A machine according to claim 4, wherein each tooth is of non-constant width.

6. / A machine according to claim 5, having a rotor, wherein each tooth has opposite sides which diverge going away from said rotor over at least a major portion of their length starting from the free ends of the tooth.

7. / A machine according to claim 1, wherein said teeth do not have pole shoes, and include, in the vicinity of their free end, slots for mounting pieces of locking shim for locking coils engaged on the teeth.

8. / A machine according to claim 1, having a rotor, wherein said rotor is a permanent magnet rotor and a flux-concentrating rotor.

9. / A machine according to claim 1, wherein each sector is formed by a stack of superposed magnetic laminations.

10. / A machine according to claim 1, wherein, when joined together, said sectors form holes designed to receive fixing screws for fixing detectors disposed on said teeth.

11. / A machine according to claim 1, wherein said current is three-phase.

12. / A machine according to claim 1, wherein the number of teeth n_teeth is in compliance with the relationship n_teeth=n_paires*n_phases, where n_paires is the number of pairs of poles and n_phases the number of phases.

13. / A rotary electric machine including a stator, having a magnetic circuit with teeth forming intervening slots for receiving electrical conductors, wherein said magnetic circuit is made up of an assembly of sectors defining air-gaps intersecting said teeth at half-width and wherein the electric power of said machine lies in the range 1 to 750 kW.

14. / A rotary electric machine including a stator, having a magnetic circuit with teeth forming intervening slots for receiving electrical conductors, wherein said magnetic circuit is made up of an assembly of sectors defining air-gaps intersecting said teeth at half-width and wherein said machine has an outside diameter which lies in the range 100 to 600 mm.