External rotor axial magnetic flux hub motor vibration and noise analytical calculation method

Abstract

The invention discloses an outer rotor axial magnetic flux hub motor vibration and noise analytical calculation method, which belongs to the technical field of motor vibration and noise calculation and comprises the following steps of: S1, establishing an air gap magnetic field model and calculating electromagnetic force; S2, calculating modal parameters and vibration modes of an end cover; S3, calculating the vibration response of the end cover; S4, acquiring the overall sound power level of the magnetic flux motor; and S5, verifying a result. Based on the modal superposition method, the method can calculate the vibration response of any point on the surface of the end cover, rapidly predicts the electromagnetic vibration and noise in the whole speed range, provides a theoretical basis for the optimization design of the vibration noise of the axial flux motor, and is worthy of popularization and application.

Description

technical field [0001] The invention relates to the technical field of motor vibration and noise calculation, in particular to an analytical calculation method for vibration and noise of an axial magnetic flux hub motor with an outer rotor. Background technique [0002] Electromagnetic noise, mechanical noise and aerodynamic noise are the main sources of motor noise. At present, researchers have only conducted a lot of research on the vibration and noise of traditional radial motors. Compared with radial motors, axial flux motors have a series of advantages such as high power density, high efficiency, and compact structure. However, as a new type of motor, the vibration and noise of axial flux motors have not yet received effective attention, especially for For axial flux hub motors with low speed outer rotors, electromagnetic noise dominates. [0003] Two effective ways to calculate motor vibration and noise are numerical method and analytical method. At present, research...

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is: how to solve the problem that the vibration and noise analytical model of the axial flux motor in the prior art does not consider the influence of the sound radiation efficiency, so the problem of poor accuracy is provided, and an axial flux motor of the outer rotor is provided. In-wheel motor vibration and noise analytical calculation method, this method is based on the mode superposition method, can calculate the vibration of any position of the motor structure, and obtain the sound radiation of the whole motor by calculating the sound radiation efficiency of each mode

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