A double -rotor synchronous motor using a permanent magnet auxiliary cage rotor

Abstract

The invention relates to a double-rotor synchronous motor using a permanent magnet auxiliary cage rotor, which chiefly includes the chassis, an outer rotor, a stator, an inner rotor and a rotating shaft; the outer rotor and the casing are connected with each other through dovetail slots, a stator with slots on both sides is arranged between the outer rotor and the inner rotor, three-phase symmetrical stator windings are embedded in the stator slots, the inner rotor and the rotating shaft are connected with each other through a steel sleeve, the inner rotor and the steel sleeve are connected with each other through dovetail slots, and the steel sleeve and the rotating shaft are fixed together through positioning pins; In the inner and outer rotor bodies use a magneto-barrier magnetoresistive rotor which is stacked in the axial direction, and a block counter-magnetized permanent magnet with sinusoidal variation in width and magnetizing direction is added to the non-permeable layer, and ashort-circuit cage bar with unequal width near the air gap width and near the rotating shaft width is added to the non-permeable layer. This novel double-rotor permanent magnet auxiliary cage rotor 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-rotor 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 aft...

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.

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