Radial magnetic force as a function of time (plot_Fr_time)

Post-processing documentation
Matlab commandplot_Fr_time
Module EM.pp
Description PLOT_FR_TIME plots the airgap radial magnetic force per unit area as a function of time
Parameters
Restrictions release 1.04

Result

Airgap radial force as function of time
Airgap radial force as function of time
plot_Fr_time

In this example, the radial force contains a DC component and a large component at twice the electrical frequency. The DC component has no effect on magnetic acoustic noise and vibrations. The slotting effects are present at higher frequencies. This post processing illustrates the radial force seen by a fixed point in the airgap, so there is no information on the spatial distribution of the force.

The radial force as a function of the airgap angle can be plotted with plot_Fr_space. To fully understand the magnetic vibration generation process, it is important to analyze both the frequency and wavenumber of the force waves. A 2D FFT is therefore more relevant, for instance plot_Fr_fft2.

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