Skewing in FLUX2D to reduce the Cogging Torque

An Nguyen

Hello every one,

Do anyone have experiency with the Skewing in FLUX 2D? (I also saw the Examples in FLUX, but it is for skewing of stator slot, not for magnet )

I'm designing a PMSM with salient Magnet and want to have a skew in magnet. The magnet is divided in 4 segments in axial direction. Each segment is skewed 1.875° with respect to each other.

To calculate the effect of skewing at no-load, i simulated the Motor with the magnetostatic mode. I simulated the motor with 1/4 length, so i simulated 4 times and for different rotor starting angle. At the end i add all the 4 cogging torque to get the reduced torque. Is this the correct way to investigate the effect of skewing?

By the way I don't know how to investigate the skewing effect at rated operation. Because there are also the current and the voltage, which are depent on length of motor. Can I use the same superposition method?

Thank you in advance

 

Divin Pulakudiyil Xavier

Hi An Nguyen,

I am no expert but, if your model is skewed I think one could define the step skew in flux skew with

Transient magnetic application --> step skew --> define topology

You could Model the same motor in 2D for a complete length (without skew).

Compare the cogging torque. You can see the difference

 

 

 

Divin Pulakudiyil Xavier

Hi An Nguyen,

I am no expert but, if your model is skewed I think one could define the step skew in flux skew with

Transient magnetic application --> step skew --> define topology

You could Model the same motor in 2D for a complete length (without skew).

Compare the cogging torque. You can see the difference

 

 

 

PhilippeW

Please find an example of a step skew computation of a motor. Today, this is covered by the step skew function in Flux.

When skewing, you can select what to skew for continuous skew. Step skew is essentially applied to the rotor.

I hope this helps.

An Nguyen

Divin Pulakudiyil Xavier said:

Hi An Nguyen,

I am no expert but, if your model is skewed I think one could define the step skew in flux skew with

Transient magnetic application --> step skew --> define topology

You could Model the same motor in 2D for a complete length (without skew).

Compare the cogging torque. You can see the difference

 

 

 

Thank you! i will try it .

An Nguyen

Philippe_20439 said:

Please find an example of a step skew computation of a motor. Today, this is covered by the step skew function in Flux.

When skewing, you can select what to skew for continuous skew. Step skew is essentially applied to the rotor.

I hope this helps.

Thanks a lot! This Doku is helpful!