Double-stator hybrid excitation motor with T-type core inner stator

Abstract

The invention discloses a double-stator hybrid excitation motor with a T-type core inner stator. A center rotor is coaxially arranged in the middle of an outer stator and an inner stator. 12 T-type teeth are uniformly distributed along the circumferential direction of the inner stator yoke of the inner stator. The T-type teeth are sleeved with excitation windings. The top of each T-type tooth is near the center rotor. An inner stator slot is formed between every two adjacent T-type teeth. An arc permanent magnet is embedded fixedly between the tops of every two T-type teeth. The permanent magnets are magnetized along the tangential direction, and every two adjacent permanent magnets are magnetized in opposite directions. The inner and outer diameters of the permanent magnets are equal to the inner and outer diameters of the tops of the T-type teeth. The excitation windings are wound on the vertical parts of the T-type teeth of the inner stator, and thus, an electric excitation magnetic field connected in parallel with a permanent magnetic field is formed. The electric excitation magnetic field does not demagnetize the permanent magnets. When direct currents in different directions are fed to the excitation winding, the electric excitation magnetic field and the permanent magnetic field interact with each other to strengthen or weaken the magnetism.

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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