Patent ID: 7005764

Claim:
Electrodynamic apparatus comprising: a rotor having a permanent magnet surface extending a rotor length along an axis between rotor end locations; a stator assembly disposed about said axis comprising: a first stator core module formed of pressure shaped processed ferromagnetic particles which are generally mutually insulatively associated, said first core module comprising a back iron portion and a plurality of stator pole core members each formed integrally with said back iron portion said back iron portion having a back iron widthwise extent and back iron length extending from a bottom surface to a top surface, said backiron length being determined as a function of said widthwise extent and manufacturing criteria of pressure shaping, each said core member having a winding core portion having a core widthwise extent, and extending a core length between bottom and top winding core surfaces, and a flux interaction portion having an interaction widthwise extent, integrally formed with said winding core portion, having a flux interaction surface spaced from said rotor surface to define at least a portion of a working gap and extending an interaction length from an interaction top surface to an interaction bottom surface, and a second stator core module formed of pressure shaped processed ferromagnetic particles which are generally mutually insulatively associated, said second core module comprising a back iron portion and a plurality of stator pole core members, each formed integrally with said back iron portion, said back iron portion having a back iron widthwise extent and extending a back iron length from a bottom surface to a top surface, said backiron length being determined as a function of said widthwise extent and manufacturing criteria of pressure shaping, each said core member having a winding core portion having a core widthwise extent and extending a core length between bottom and top winding core surfaces, and a flux interaction portion having an interaction widthwise extent, integrally formed with said winding core portion, having a flux interaction surface spaced from said rotor surface to define at least a portion of a working gap and extending an interaction length from an interaction top surface to an interaction bottom surface; said bottom surfaces of said back iron portions of said first and second stator core modules being circumferentially aligned in mutually facing relationship about said axis with said backiron lengths combining in substantially abutting form to substantially equal said rotor length; and a field winding assembly comprising a plurality of wire windings extending over and supported from the generally axially aligned outward winding core surfaces of the winding core portions of said first and second stator core components.