DESIGN AND PERFORMANCE OF FIELD REGULATED RELUCTANCE MACHINE

A unique topological configuration for rotating electromagnetic machin es that can produce significantly higher force density than an inducti on machine is investigated. The stator is constructed using full pitch concentrated windings embedded in conventional slots. Rotor saliency is produced using poles constructed of axially oriented laminations. O peration is such that all of the conductors are actively taking part i n torque production all of the time. The means for exciting the stator windings allows for independent control of torque and regulation of t he rotor flux. A force density comparison is made based on operation w ith equal surface current density, conduction losses, and peak air-gap flux density. Construction and testing of a prototype 500-rpm, 28-kW laboratory machine, converter, and controller are described.