SELF-SUPPORTING COIL BRACE

• US 3,740,600 A
• Filed: 12/12/1971
• Issued: 06/19/1973
• Est. Priority Date: 12/12/1971
• Status: Expired due to Term

• Current Assignee: Barry J. Turley
• Original Assignee: Barry J. Turley
• Inventors: Turley, Barry J.
• Primary Examiner(s): Duggan, D. F.
• Application Number:
  US05/206,826
• Time in Patent Office: 555 Days
• Field of Search: 310/214,216,218,194,180,6A,269
• US Class Current: 310/194
• CPC Class Codes: H02K 1/24 Rotor cores with salient poles ; Variable reluctance rotors
• CPC Class Codes: H02K 2201/15 Sectional machines
• CPC Class Codes: H02K 3/527 applicable to rotors only
• CPC Class Codes: Y10S 174/21 Rotor

Abstract

A wedge-shaped device to be frictionally inserted between adjacent pressed-to-form, edge-wise-wound, coils of a salient pole machine to prevent separation of the coils from the poles by the tangential component of centrifugal force acting on the coils. A flange portion integrally secured to the inner end of the wedge extends in opposite directions to be interposed in close relationship between the rotor core and each of the adjacent coils to hold the wedge in place.

Claims

1. An improved rotor for a salient pole machine of the type having a rotor core, a plurality of angularly spaced pole bodies projecting radially from the core, each of the pole bodies having a head on the outer end thereof with tips projecting in both directions from the pole body in concentric relation to the core, means for securing the pole bodies to the rotor core, and a coil embracing each pole body so that adjacent coils are angularly spaced in respect to one another and define interpolar spaces, each space having an included acute angle toward the rotor core, wherein the improvement comprises:

at least one brace disposed between the coils in each of the interpolar spaces, said brace being tapered in cross-section so as to conform to and occupy only the radially inward portion of its interpolar spaces, with the preponderant remaining portion of the spaces being open to allow free ventilation to the coils, said brace having integrally secured on its radially inner end a flange portion having legs extending outwardly in opposite directions to be interposed in close frictional relationship between the rotor core and their respective coils, said legs comprising the sole means of securing said brace in the interpolar space and said brace acting to mutually exert opposing forces on the adjacent coils to prevent their movement away from the pole bodies when rotated.

2. An improved rotor as set forth in claim 1 wherein the coils are of the edge-wise wound type.

3. An improved rotor as set forth in claim 1 wherein said brace is an elongate member extending the axial length of the rotor core.

4. An improved rotor as set forth in claim 1 wherein the number of poles on the rotor is at least eight and the acute angle between poles is <

or = 45*.

5. An improved rotor as set forth in claim 1 wherein said brace is constructed of a non-conducting material.