We have proposed a current superimposition variable flux reluctance machine that can control its torque constant. This machine can be operated by using a 6-phase superimposition current composed of AC-armature and DC-field currents. In this paper, we propose a current superimposition variable flux machine using permanent magnets. The permanent magnets increase the DC magnetic flux. First, the structure and operational principle of this machine are described. Next, the torque characteristics are computed under vector control. Finally, the computed characteristics are verified by carrying out measurements on a prototype.

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