Elmer Discussion Forum

Hello, I managed to set up the circuit equations. As expected it turned out that 2 components have to be used, one for A+ and one for A- terminal. The anti-serial connection of the coils is provided within the circuits definitions. circuit_tions.jpg The results seem to be valid. Here the current res...

Hello, In order to learn how to couple the circuits equations with elmerFEM magnetic solver I wanted to simulate a volage step responce of the simple 2D magnetic circuit with a coil. Example-image.jpg The model files with scaled mesh (to meters) are attached. I have a problem understanding how many ...

Hello Martin,

thanks again. I will try to set-up something. I suppose I only need to connect each phase of the machine with very large resistance ~1MOhm (for delta connection). The voltage on the resistance should be the EMF voltage.

Mladen

Hello Martin, Thank you very much for your reply. I had a feeling that the circuits are the most practical way to calculate the voltages. My problem is that I am relatively new to elmer and at the moment it seems very difficult for me to set up this circuit simulation. Is it possible for you to use ...

Hello, What are the possibilities to calculate the torque for the PMSM machine? In the attached example I used the "r outer" and "r inner" keywords in the rotor airgap body (just outside the rotor steel area). The torque shape seems to be ok. The values have to be scaled with the...

Any additional thoughts on this? Can we use circuits to calculate quantities such as induced voltage or inductance?

Mladen

It there a docu of parameters or keywords that can be used to setup a particular solver? I cant find anything about the "Mortar BCs Additive = Logical True" in the documentation.

Mladen

Hello, just wanted to post here the reply from Peter that he wrote within the "PMSM Simulation with Symmetry BC" topic (http://www.elmerfem.org/forum/viewtopic.php?t=7669). This, in my opinion resolves the issue with the simulation time of the symm model used in the MgDyn2D solver. Hi, Thi...

When I runf the sumulation without the steel parts (rotort and stator as air) the simulation of symm model runs very fast. MAIN: ComputeChange: NS (ITER=1) (NRM,RELC): ( 0.45360765E+12 1.9266357 ) :: mgdyn2d ComputeChange: NS (ITER=2) (NRM,RELC): ( 0.45360765E+12 0.0000000 ) :: mgdyn2d ComputeChange...

Hello Perer, you probably wanted to answer the post "PMSM Simulation Symmetric vs Full Model". I use direct solvers in both cases. In the case of the full model the mortar elements are used on the sliding boundary due to rotation as well. In the symm model additional mortar BC are used on ...