A double-stator hybrid excitation motor with T-shaped core inner stator

Abstract

The invention discloses a double-stator hybrid excitation motor with a T-shaped iron core inner stator. The middle rotor is coaxially installed between the outer stator and the inner stator. The inner stator yoke of the inner stator has 12 T-shaped teeth evenly arranged along the circumferential direction. There is an excitation winding on the upper cover. The top of the T-shaped teeth is close to the middle rotor, and an inner stator slot is formed between two adjacent T-shaped teeth. An arc-shaped permanent magnet is fixedly embedded between the tooth tops of each two T-shaped teeth. The permanent magnets are magnetized tangentially and the two adjacent permanent magnets are magnetized in opposite directions. The inner and outer diameters of the permanent magnets are respectively the same as the T-shaped teeth. The inner and outer diameters of the tooth tops of the shaped teeth are equal; the excitation winding is wound on the vertical part of the T-shaped teeth of the inner stator, thereby forming an electric excitation magnetic field in parallel with the permanent magnetic field to avoid the demagnetization effect of the electric excitation magnetic field on the permanent magnet. When DC currents in different directions are passed through the excitation winding, the electric excitation magnetic field interacts with the permanent magnetic field to achieve magnetization increase or weakening adjustment.

Description

technical field [0001] The invention relates to the fields of electric engineering and motors, in particular to a hybrid excitation permanent magnet motor, which is suitable for electric vehicles and other application occasions requiring high torque density and wide speed regulation range. Background technique [0002] Traditional permanent magnet motors have the advantages of high efficiency, high torque and high power density, and are widely used in new energy fields such as electric vehicles and wind power generation. However, due to the strategic position of rare earth resources and the uncontrollable constant excitation field, the traditional permanent magnet motor The development of magneto in related fields has been severely hindered. Therefore, reducing the amount of rare earth permanent magnets and realizing wide speed regulation in the constant power region have become the technical goals of permanent magnet motors. [0003] A hybrid excitation motor is a motor th...

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Problems solved by technology

However, since all the magnetic sources of the motor are located in the stator, it inevitably brings problems such as space contradictions and heat dissipation difficulties.

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