An electric-machine–magnetic-reducer combination set

Аннотация

An electric-machine–reducer combination set (CEMR) with a permanent-magnet internal rotor is considered. The functional characteristics of the hybrid device are analyzed. A stator winding powered by a static-frequency converter enables combination of an electromechanical converter that functions as a motor or generator with a twin-rotor magnetic reducer with a continuously variable reduction ratio. The CEMR comprises a stator with a multipolar three-phase winding; an outer rotor with laminated prismatic ferromagnetic rods, number of which z₁ is close to number of the ports p₁ of the stator winding; and an internal magnetoelectric rotor with number of ports p₂ equal to the difference z₁–p₁. The magnetic field of the stator with number of the ports p₁ arrives at one side of the internal ferromagnetic squirrel-cage rotor. At the output on the other side of this rotor, we have the fundamental harmonic with a small number of ports equal to the difference z₁–p₁. This magnetic field with a small number of poles interacts with the magnets of the internal rotor, which has the same number of the ports. The electromagnetic torques of the CEMR are generated in a way similar to that in the classical synchronous electric machine; consequently, these moments have a definite restrictive maximum. The CEMR may find application in industries such as machine-tool construction, robotics, transport, defense technology, wind-power engineering, etc.