Rotor torsion inclination method suitable for permanent magnet synchronous motor

Abstract

The invention relates to a rotor torsion inclination method suitable for a permanent magnet synchronous motor, the permanent magnet synchronous motor comprises a stator and a rotor core which are coaxial, and the method comprises the following steps: the rotor core is axially divided into five sections of rotors with the same length, and according to the number of pole pairs of the motor and the order of magnetic field harmonic waves needing to be weakened, one section of rotor is taken as a reference; and the other four sections of rotors are respectively twisted clockwise or anticlockwise by an angle alpha 1 or alpha 2 to form an arrangement mode for weakening specific-order magnetic field harmonic waves. Compared with the prior art, the five rotors can be freely combined to be distributed in the axial direction, rich torsion inclination angles are generated to be matched to weaken magnetic field harmonic waves of specific orders, and when the multiple rotors are axially and symmetrically distributed in a staggered mode, vibration noise can be optimal.

Description

technical field [0001] The invention relates to the technical field of permanent magnet synchronous motors, in particular to a rotor torsional tilting method suitable for permanent magnet synchronous motors. Background technique [0002] Energy crisis, environmental pollution and greenhouse effect are becoming more and more serious, which put forward higher requirements for energy saving and emission reduction in the automobile industry. The development of new energy vehicles has become an inevitable trend of the transformation of the automobile industry. Among them, the "Twelfth Five-Year Plan" special plan for the development of electric vehicle technology mentioned that the national science and technology plan will increase its efforts to continue to support the technological innovation of electric vehicles. For new energy electric vehicles, the core of the drive system is the drive motor, and the performance of the drive motor directly determines the performance of the n...

AI Technical Summary

Problems solved by technology

However, the above-mentioned patent has two aspects to be improved. On the one hand, the torsional inclination angle of the equal differential arrangement will limit the further distribution of the rotor; on the other hand, the stator-rotor torque between the adjacent stators corresponding to the multi-stage rotor has not been eliminated to the greatest extent.

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