# calculate inductance

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Hello

who can help me to calculate inductance matrix for Electrical Machines in Altair Flux by using macros or any other ways?

Best regards

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Hello Tehran,

Actually, you have several possibilities depending of your physics and your specific needs.

The most simple one, only for linear problems with no magnetic saturation (i.e., rotor and stator modelled as ideal materials), is to use an specific sensor which measures inductance (it divides the total flux embraced by the coil between the current carried by this same coil, which is, in fact, an accurate definition of inductance for magnetic linear problems).

You can find more accurate and sophisticated way to calculate this value for electric machines in our tutorial in 2D: Brushless IPM motor (embedded magnets), section 7.3. You will find it in the supervisor : Open example -> Technical tutorials -> Brushless IPM motor (embedded magnets) ->Computation of inductances and static torque.

Another approach to simulate inductance in electric machines is to use the macro ComputeInductanceMatrix, you can load it into your project from Macros_Flux2D_Postproc. This is an advanced approach which uses frozen permeability techniques to take into account material saturation caused by the magnets where the machine is in working conditions. Please, notice that this macro can take some time to compute since it runs several simulations to accurately represents this physical phenomena.

I hope the proposed documentation helps you with your inductance calculus. Please, do not hesitate to return to me in case you need further information about these topics.

Best regards.

tehran likes this

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1 hour ago, Alejandro Rodríguez said:

Hello Tehran,

Actually, you have several possibilities depending of your physics and your specific needs.

The most simple one, only for linear problems with no magnetic saturation (i.e., rotor and stator modelled as ideal materials), is to use an specific sensor which measures inductance (it divides the total flux embraced by the coil between the current carried by this same coil, which is, in fact, an accurate definition of inductance for magnetic linear problems).

You can find more accurate and sophisticated way to calculate this value for electric machines in our tutorial in 2D: Brushless IPM motor (embedded magnets), section 7.3. You will find it in the supervisor : Open example -> Technical tutorials -> Brushless IPM motor (embedded magnets) ->Computation of inductances and static torque.

Another approach to simulate inductance in electric machines is to use the macro ComputeInductanceMatrix, you can load it into your project from Macros_Flux2D_Postproc. This is an advanced approach which uses frozen permeability techniques to take into account material saturation caused by the magnets where the machine is in working conditions. Please, notice that this macro can take some time to compute since it runs several simulations to accurately represents this physical phenomena.

I hope the proposed documentation helps you with your inductance calculus. Please, do not hesitate to return to me in case you need further information about these topics.

Best regards.

I want to calculate inductance in 3D simulation to compare with analytical calculation.

Best Regards.

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You can find the way to calculate the  inductance matrix for Electrical Machines in Altair Flux here:

Hopefully it helps!

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Hello Alejandro Rodríguez,

DELETE THIS POST

Best Regards,

HK

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On 7/19/2019 at 12:13 PM, Alejandro Rodríguez said:

Hello Tehran,

Actually, you have several possibilities depending of your physics and your specific needs.

The most simple one, only for linear problems with no magnetic saturation (i.e., rotor and stator modelled as ideal materials), is to use an specific sensor which measures inductance (it divides the total flux embraced by the coil between the current carried by this same coil, which is, in fact, an accurate definition of inductance for magnetic linear problems).

You can find more accurate and sophisticated way to calculate this value for electric machines in our tutorial in 2D: Brushless IPM motor (embedded magnets), section 7.3. You will find it in the supervisor : Open example -> Technical tutorials -> Brushless IPM motor (embedded magnets) ->Computation of inductances and static torque.

Another approach to simulate inductance in electric machines is to use the macro ComputeInductanceMatrix, you can load it into your project from Macros_Flux2D_Postproc. This is an advanced approach which uses frozen permeability techniques to take into account material saturation caused by the magnets where the machine is in working conditions. Please, notice that this macro can take some time to compute since it runs several simulations to accurately represents this physical phenomena.

I hope the proposed documentation helps you with your inductance calculus. Please, do not hesitate to return to me in case you need further information about these topics.

Best regards.

Hello Alejandro Rodríguez,

"Another approach to simulate inductance in electric machines is to use the macro ComputeInductanceMatrix, you can load it into your project from Macros_Flux2D_Postproc. This is an advanced approach which uses frozen permeability techniques to take into account material saturation caused by the magnets where the machine is in working conditions. Please, notice that this macro can take some time to compute since it runs several simulations to accurately represents this physical phenomena."

What is difference between the incremental inductance calculated using delta flux / delta currents vs inductance matrix calculated by the ComputeInductanceMatrix? We did that and the values are completely different also the waveform shape is different.

Best Regards,

HK

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