High speed synchronous machine having a rotor provided with magnets arranged for orthoradial magnetic induction

• US 4,700,096 A
• Filed: 02/19/1986
• Issued: 10/13/1987
• Est. Priority Date: 02/28/1985
• Status: Expired due to Fees

• Current Assignee: AUXILEC 188
• Original Assignee: Auxilec
• Inventors: Epars, Michel
• Primary Examiner(s): Duggan, Donovan F.
• Application Number:
  US06/830,817
• Time in Patent Office: 601 Days
• Field of Search: 310/152, 310/153, 310/156, 310/70, 310/70 A
• US Class Current: 310/153
• CPC Class Codes: H02K 1/2773 consisting of tangentially magnetized radial magnets

Abstract

The synchronous machine comprises a rotor provided with permanent magnets arranged for orthoradial magnetic induction and which are disposed around the axis in such a way that two adjacent magnets have counter-direction inductions, pole-pieces deviating the said induction so that it becomes radial to the periphery and each of the pole-pieces being formed of half-poles separated by a split pin applying each of the half-poles against the adjacent magnet, and wherein each magnet and each half-pole is in a single block in axial direction, the edges of the flanges ensuring the cohesion in radial direction.

Claims

1. A high speed synchronous machine rotor comprising:

a plurality of magnets equally spaced circumferentially and angularly alternating with a plurality of poles, each pole including two half-pole pieces, adjacent radial faces of said half-pole pieces being spaced apart;

means for restraining displacement of said poles and magnets in an axial direction;

first means for restraining radial displacement of said poles and magnets, said first means including a split pin disposed in a recess formed in said adjacent faces of said half-pole pieces of each pole, said pin having a split positioned radially within the recess, said pin forcing angularly outward opposite faces of said half-pole pieces against said magnets thereby providing cohesion between the magnets and pole pieces of said rotor; and

second radial restraining means including axially spaced flange members having continuous edges coacting with corresponding outwardly extending shoulders formed on said half pole-piece.

2. A rotor according to claim 1, further comprising third radial restraining means including a plate member positioned against radially outward faces of said magnets and grooves formed in said opposite faces of said half-pole pieces adjacent to said magnet for receiving opposite edges of said plate member.

3. A rotor according to claim 2 wherein said plate member is made of nonmagnetic material.

4. A high speed synchronous machine according to claim 3, wherein said recess is formed from mating semi-cylindrical grooves located in each said adjacent face.