Altair RISE

A program to recognize and reward our most engaged community members

Nominate Yourself Now!

¿How to set correctly coils for induction cooktops?

Hi all.

I am trying to model a an induction cooktop in 2D. I want to do several simulations including differetn level of excentricty between the coil and the pot.

Here my questions.

1.- Axysimetry works for this?

2.- If I want to put 50 Amps, peak-peak to the induction coil, wich value do I need to put in the electric circuit?

3.- What is the difference between putting the coil in series or parellel?

COIL_REGION.png

ELECTRIC_CIRCUIT.png

TOTAL_CURRENT.png

MODEL.png

Find more posts tagged with

Flux

Accepted answers

All comments

C_Favre

Hi,

By excentricity you mean that the axis of the coil and pot are different? In this case axisymetric can not be used, 3D simuation is necessary.

For the conversion to peak to peak to RMS, you have to divided the peak to Peak value by 2*sqrt(2)=50/(2*sqrt(2))=17.67ARMS

For the coil serial or parrallel option is maintly used for rotating machine to defined the connection of the coil not repsented in the FE Domain in case of periodicity. We can have coil in serial or parrallel at the end it will just adpat the value of the current in the coil. If there are coil in parrellel the value of the current will be divided by the number of parallel path. This allows to defined in the current sources the real current we imposed to run our motor.

In your case you have to used all in serial

I hope this helps.

Best regards.

Cyril

Electro_Dave

Hi,

Thanks for helping with this. You're guidance really helped.

Now I am looking for calculating inductance for the pot and for the induction coil.

Do you have some tips for these new challenges ?

Regards

Ovando_RBB

Hi there,

To accurately account for eccentricity variations between the coil center and the pot core, a 3D electromagnetic model is required. This approach captures the asymmetry and its impact on magnetic behavior, which cannot be fully represented in 2D (either x/y or axisymmetric).

If you're not specifically interested in analyzing the current distribution per conductor winding (which is often relevant for thermal analysis) you can simplify the model by representing the entire winding as a solid conductor. In that case, use Ampere-Turns instead of Amperes to define the excitation. This method still preserves the correct electromagnetic behavior for circuit-level performance evaluation.

Once the simulation is complete, you can extract the equivalent inductance by analyzing the voltage, current, and phase shift at the coil terminals.

Important: Remember to multiply the computed inductance by the square of the total number of turns in your winding to obtain the final inductance value for your design.

Hope that helps!