A dual-stator hybrid excitation motor based on magnetic field modulation

Abstract

The invention discloses a magnetic field modulation-based double-stator hybrid excitation motor. Combination of a brushless electric excitation system and a permanent magnet synchronous motor is relatively well achieved by the designed hybrid excitation motor; and the hybrid excitation motor has the characteristics of high power density, high torque density and the like of a permanent magnet motor, also has the advantages that the excitation magnetic field can be flexibly adjusted and the speeding regulating range is wide, so that the hybrid excitation motor can be better applied to the field of driving of electric vehicles and the like. Meanwhile, by a magnetic field modulation technology, a permanent magnet on a rotor and an exciting winding on an inner stator generate a magnetic field which is the same as that of an armature winding in number of pole pairs in an external air gap, so that electromechanical energy conversion is achieved. A permanent magnet with an asymmetric V-shaped structure on the rotor has a unilateral magnetism gathering effect, so that the torque quality of the motor is effectively improved; an electric excitation winding does not need an electric brush or a slip ring; and meanwhile, the reliability and the fault tolerance of the motor is improved by a double-stator design.

Description

technical field [0001] The invention relates to a dual-stator hybrid excitation motor based on magnetic field modulation, which belongs to the field of permanent magnet motor design. Background technique [0002] At present, the permanent magnet motor has attracted extensive attention in the field of drive for its advantages of high power density and high torque density. However, since the excitation flux generated by the permanent magnet remains constant, the excitation cannot be adjusted, so it is widely used in applications that require a wide speed range. limit. Therefore, in order to solve this problem, hybrid excitation motors have been developed. Hybrid excitation motors combine the advantages of permanent magnet motors and electric excitation motors. They not only have the advantages of high power density of permanent magnet motors, but also have the ability to flexibly adjust the excitation magnetic field and broaden the speed regulation range. [0003] In recent ...

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Problems solved by technology

[0005] Technical problem: Aiming at the above problems, a dual-stator hybrid excitation motor based on magnetic field modulation is proposed, which solves the problems of limited field modulation range, complex structure and low reliability of traditional hybrid excitation motors; through the combination of permanent magnets and magnetic barriers, the realization of The excitation winding can not only be used to adjust the excitation magnetic field, but also interact with the permanent magnetic field to generate additional torque output

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