Double-stator permanent magnet motor with inner and outer stators with different lengths

Abstract

The invention discloses a double-stator permanent magnet motor with inner and outer stators with different lengths. The double-stator permanent magnet motor comprises an outer stator, a rotor and an inner stator which are sequentially sleeved and connected from outside to inside, wherein the outer stator comprises an outer stator iron core and an outer stator coil wound inside an outer stator ironcore groove; the inner stator comprises an inner stator iron core and an inner stator coil wound in an inner stator iron core groove; and the axial length of the inner stator iron core is smaller than the axial length of the outer stator iron core. The motor structure sufficiently utilizes the space inside the motor; the installation is convenient; and the power density of the motor is improved.

Description

technical field [0001] The invention belongs to the technical field of motors, in particular to a double-stator permanent magnet motor with unequal lengths of inner and outer stators. Background technique [0002] The double-stator permanent magnet motor generates a rotating magnetic field jointly by the inner and outer stators, and there are energy exchange air gaps on both sides of the rotor. Compared with the traditional single-stator motor, it can make full use of the inner space of the motor with a certain outer diameter to realize Greater power density and higher efficiency. [0003] However, there are some shortcomings in the existing double-stator permanent magnet motor structure design: so far, for the axial topology of the double-stator permanent magnet motor, the inner and outer stators have adopted the same axial length of the iron core. For example, the Chinese patent literature with publication number CN108282120A discloses a dual-stator permanent magnet synch...

AI Technical Summary

Problems solved by technology

[0003] However, there are some deficiencies in the existing double-stator permanent magnet motor structure design: so far, for the axial topology of the double-stator permanent magnet motor, the inner and outer stators have adopted the same axial length of the iron core

But in fact, because the rotor in the middle is a cup-shaped structure, the outer stator has a larger axial space than the inner stator. The design of the inner and outer stators is equal in length will cause difficulties in installation, and will also make the power density of the motor not high.

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