Stator modular double-rotor consequent-pole permanent magnet motor

Abstract

The invention discloses a stator modular double-rotor consequent-pole permanent magnet motor, which comprises an inner rotor, an outer rotor and a stator located between the inner rotor and the outerrotor, and is characterized in that the inner rotor and the outer rotor respectively form independent air gaps with the stator; the stator comprises a plurality of stator modules, the stator modules are connected through iron core magnetic bridges, and the outer side and the inner side of the yoke portion of each stator module are connected with outer stator teeth and inner stator teeth respectively. Centralized armature windings are wound on each outer stator tooth and each inner stator tooth, the positive and negative directions of the armature windings on the outer stator teeth and the inner stator teeth of the same stator module are opposite, and the armature windings belonging to the same phase on the inner stator teeth and the outer stator teeth are connected to form a phase winding;at least one of the inner rotor and the outer rotor is a consequent-pole permanent magnet rotor, the magnetization directions of all permanent magnets on the consequent-pole permanent magnet rotor are consistent, and the number of pole pairs of the inner rotor is the same as that of pole pairs of the outer rotor. Counter electromotive force imbalance caused by the consequent-pole permanent magnetrotor can be eliminated, and the output torque performance of the motor is improved.

Description

technical field [0001] The invention belongs to the field of motors, and in particular relates to a stator modular double rotor alternating pole permanent magnet motor. Background technique [0002] Due to the use of high magnetic energy permanent magnets, the permanent magnet motor has the advantages of high torque density, high power density, good weak magnetic performance and high efficiency, and is suitable for operation in the full speed range. Therefore, permanent magnet motors have broad application prospects in wind power generation, electric vehicles and other application fields. In order to improve the utilization rate of permanent magnets of permanent magnet motors and reduce the cost of motors, alternating pole permanent magnet motors have attracted the attention of researchers and business circles. However, the structure of the alternating pole permanent magnet motor also leads to some problems that need to be solved urgently. For example, the permanent magnet ...

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Problems solved by technology

However, the structure of the alternating pole permanent magnet motor also leads to some problems that need to be solved urgently. For example, the permanent magnet motor with 3 slots and 4 poles unit motor adopts the alternating pole permanent magnet structure, which will lead to asymmetrical air gap flux density, and the motor will run without load. The even back EMF harmonics are induced in the armature winding; the interaction between the even back EMF harmonics and the fundamental current will produce a larger odd torque ripple, which will increase the electromagnetic torque ripple of the motor and affect the output of the motor Electromagnetic Torque Performance

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