A double-stator synchronous motor with permanent magnet auxiliary cage rotor

Abstract

A double stator synchronous motor with a permanent magnet auxiliary cage rotor comprises a casing, an outer stator, a rotor, an inner stator and a rotating shaft, wherein the outer stator and the inner stator are embedded with three-phase symmetrical windings; The rotor corresponding to the inner stator and the outer stator is connected with the magnetic isolation ring through a dovetail slot to form a back-to-back integral structure; A magneto-barrier magnetoresistive rotor is adopted in the rotor body, and a block metamagnetized permanent magnet with sinusoidal variation in width and magnetizing direction and a short-circuit cage bar with unequal width near the air gap and near the rotating shaft are added to the non-magnetic permeable layer. This novel double-stator permanent magnet assisted cage synchronous motor has the remarkable advantages of excellent performance, novel structure, low cost, high mechanical strength, reliable operation, easy industrialization and so on.

Description

technical field [0001] The invention relates to a double-stator synchronous motor whose rotor adopts a permanent magnet auxiliary cage barrier structure. It belongs to the field of motors. Background technique [0002] The embedded rotor permanent magnet motor using rare earth materials has been widely used in many fields due to its high power density and torque density, high efficiency, and wide constant power operating range. However, rare earth permanent magnets are expensive and resources are limited, and the continuous supply of rare earth permanent magnet materials is also a prominent problem. Academia and industry have shown great interest in low-cost permanent magnet motors represented by low-rare earth, rare-earth-free permanent magnets and ferrites. Research and development of less rare earth / no rare earth permanent magnet motor has important theoretical significance and application value. [0003] Synchronous reluctance motors have achieved rapid development af...

AI Technical Summary

Problems solved by technology

However, this kind of motor still has shortcomings such as low torque density and power factor, serious magnetic field saturation under high power conditions, and high degree of d-q axis inductive coupling, which limits its industrial application.

Images