Self-supporting coil brace

Claim 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.