Hybrid excitation axial magnetic field permanent magnet synchronous motor structure

Abstract

The invention relates to the field of motor design, in particular to a hybrid excitation axial magnetic field permanent magnet synchronous motor structure, which comprises two symmetrically arranged rotors and a stator arranged between the two rotors, wherein the stator and the rotors are both of an annular structure and are coaxially connected; the stator comprises a first stator iron core, a second stator iron core, an armature winding and a direct-current excitation winding; each rotor comprises a rotor sheath, a rotor iron core and fan-shaped permanent magnets; the fan-shaped permanent magnets are arranged in each rotor iron core; and the rotor sheath is arranged outside each rotor iron core and the corresponding fan-shaped permanent magnets in a sleeving manner. According to the hybrid excitation axial magnetic field permanent magnet motor structure, the consequent-pole double rotors, the hybrid excitation winding single stator and the direct-current excitation winding are adopted, so that the air gap magnetic field intensity, the counter potential and the output torque can be effectively adjusted, the speed regulation range and the overload performance of the motor are improved, and the segmented stator can effectively reduce the loss of the stator core and the weight of the stator, and improve the motor efficiency and the power density.

Description

technical field [0001] The invention relates to the field of motor design, in particular to a hybrid excitation axial magnetic field permanent magnet synchronous motor structure. Background technique [0002] In the 1980s, American scholar Spooner.E proposed a hybrid excitation motor, which has two kinds of magnetic potential sources: permanent magnet source and electric excitation source, in which the permanent magnet source generates the main air gap magnetic field, and the electric excitation is used to adjust (enhance Or weaken) the main air gap magnetic field, the two interact with the armature magnetic field to achieve electromagnetic energy conversion. This type of motor combines the characteristics of traditional permanent magnet synchronous motor and electric excitation synchronous motor, and the air gap magnetic field is controllable. It is suitable for occasions that require a wide speed range and high overload performance, such as electric vehicles. [0003] Axi...

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Problems solved by technology

[0004] In order to solve the above-mentioned deficiencies mentioned in the background technology, the purpose of the present invention is to provide a hybrid excitation axial magnetic field permanent magnet synchronous motor structure, which solves the problems of narrow magnetic adjustment range and poor overload performance.

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