Learning Forum

[hujun peng]

Hello,

I am using Eddy current solver to calculate the frequency-dependent impedance for electrical motors.

I want to calculate the inductance of each conductor and their coupling. 

At first I use one pole simulation as follows. 

Then, I excite two neighboring conductors as follows:

Then, the inductance matrix will be set as 

I run the simulation at 20 kHz,

I get the results as follows:

However,  they values are too small.

 

Then, I run the simulation for a pole pair, and the model is 

For the excitation this time, I uses winding and coils. 

the first coil 

the second coil 

Then, the inductance matrix is set:

afte Simulation, the results are

The results are much larger than the result in the first case. 

However, I suppose a factor of 2 between them because a turn consists of two conductors. 

 

Therefore, my question is, why there is such a large difference. Which is one is correct for my application, i believe that the second results are more true. 

Thank you. 

[Navya Chode]

Hi hujun peng,

In the second case, the resistance seems very high(4.5 Ohm) for just one turn. I feel, may be, the first case makes sense and there is something wrong with the second case.

Regards,

Navya