Axial magnetic field consequent pole brushless hybrid excitation motor

Abstract

The invention discloses an axial magnetic field consequent pole brushless hybrid excitation motor, which comprises an axial rotor, and is characterized in that permanent magnet N poles distributed in an array are fastened in one side of the axial rotor, permanent magnet S poles distributed in an array are fastened on one side of the axial rotor, one side of the axial rotor is fixedly provided with iron core poles which are distributed in an array mode, one side of the axial rotor is provided with an axial stator, the axial rotor and the axial stator are coaxial, an air gap is formed between the axial rotor and the axial stator, one side of the axial stator is provided with an armature winding in a fastening mode, and the armature winding is close to the air gap. An alternating-current excitation winding for realizing brushless excitation is fastened between the armature winding and the axial stator, the armature winding and the alternating-current excitation winding are wound on the axial stator, and the armature winding and the alternating-current excitation winding are coaxial. According to the motor, the alternating-current excitation winding is adopted, an electric brush and a slip ring are omitted, brushless excitation is achieved, the cost of the motor is reduced, and the reliability is improved.

Description

technical field [0001] The invention relates to a motor, in particular to an axial magnetic field alternating pole brushless hybrid excitation motor. Background technique [0002] Due to energy shortages, serious environmental pollution and other issues, sustainable development of life and production has become an urgent need. In order to reduce the exhaust emissions of fuel vehicles, all countries are stepping up the development of electric vehicles. Compared with traditional fuel vehicles, electric vehicles have the advantages of high efficiency, low pollution, and low noise. The drive motor is the core component of an electric vehicle, and it needs to have the characteristics of high efficiency, high power density, and high reliability. Permanent magnet synchronous motors are gradually occupying the electric vehicle drive motor market due to their advantages of high power density and high efficiency. [0003] Permanent magnet synchronous motors are divided into radial ...

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Problems solved by technology

[0003] Permanent magnet synchronous motors are divided into radial and axial according to the direction of magnetic flux. Compared with radial flux motors, the direction of magnetic flux of axial flux motors forms a closed loop along the shaft, which has short axial dimensions, light weight, and small volume. , high efficiency, good heat dissipation performance, high power density and other advantages, it has a good application prospect in the drive motor system of electric vehicles, but its weak magnetic performance is poor, and the inherent characteristics of permanent magnet materials make it difficult to adjust the air gap magnetic field of the motor, which affects Electric vehicles operate efficiently in a wide area, so hybrid excitation motors emerge as the times require. Hybrid excitation motors usually add DC excitation windings to the rotor to achieve magnetic field adjustment, but the addition of brushes and slip rings makes the cost higher and the reliability lower.

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