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MMF Harmonic Analysis

Hello,
here i have made a reluctance motor on Fluxmotor then i exported it to Flux 2d to check the harmonics again but the results from Fluxmotor were different compared to Flux 2d .
Why is that? which one should i take into concideration?

kind regards

Ali

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Flux

FluxMotor

v2022.1.0

Accepted answers

Ali Sawan

Hi,

In the case of FLux when you do the FFT you do for the whole motor? or for one part (for example you represent one pole). if it is the case can you try to do it for the whole motor.

Keep us informed.

Thanks.

I have done it for the whole motor .

All comments

asoualmi

Hi,

In the case of FLux when you do the FFT you do for the whole motor? or for one part (for example you represent one pole). if it is the case can you try to do it for the whole motor.

Keep us informed.

Thanks.

Ali Sawan

Hi,

In the case of FLux when you do the FFT you do for the whole motor? or for one part (for example you represent one pole). if it is the case can you try to do it for the whole motor.

Keep us informed.

Thanks.

I have done it for the whole motor .

asoualmi

From the sahred picture, in FluxMtor you dispaly the MMF and in Flux you display the radial component of the flux density? is right.

Ali Sawan

From the sahred picture, in FluxMtor you dispaly the MMF and in Flux you display the radial component of the flux density? is right.

yes exactly.
doesnt that mean that it should have the same shape at least .
we can see big difference between the two pics

Ali Sawan

yes exactly.
doesnt that mean that it should have the same shape at least .
we can see big difference between the two pics

We calculated the radial component of the flux density because there is no other option to display the MMF in Flux 2D, as we were told since a colleague from Altair suggested us this solution to compute the MMF.

We want to know the influence of our rotor geometry changes into the MMF in order to improve our performance regarding the torque ripple. As far as we are concerned, the MMF has the most influence on the torque ripple.

Unfortunately we cannot display the MMF in Flux Motor when we modify the rotor geometry, since Flux Motor works only with the predefined geometries. That is the background of why we want to compute the MMF in Flux 2D.

Could you help us finding the best way to do it?

asoualmi

We calculated the radial component of the flux density because there is no other option to display the MMF in Flux 2D, as we were told since a colleague from Altair suggested us this solution to compute the MMF.

We want to know the influence of our rotor geometry changes into the MMF in order to improve our performance regarding the torque ripple. As far as we are concerned, the MMF has the most influence on the torque ripple.

Unfortunately we cannot display the MMF in Flux Motor when we modify the rotor geometry, since Flux Motor works only with the predefined geometries. That is the background of why we want to compute the MMF in Flux 2D.

Could you help us finding the best way to do it?

Hi,

Sorry for the delay. You are right there no function allows to compute the MMF in Flux, but you can do it by computing the magnetic field (H) in the air gap using a path. The MMF is the product between the current and the number of turns and this equal to the integral of the magnetic field along a path.

Thanks.