Electric Motor

Project Support
1

My project is electric motor; I am planning to do simulation about it and know how the distribution of the heat is. I already doing the setting, but my problem is that I don’t know how to create the shaft and fan to rotating, I have been created the cylinder for MRF rotating but its not affecting the air from the flow then it is not using the solid material because I need the temperature results from both of it, also the distribution of the heat from power source is not distributing very well because it looks like creating heat at one place. Is it possible to setting that I can distribute it evenly?

10kW | SimScale Workbench

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2

Hi @masagung30 ,

thanks for using SimScale!

My name is Renan and I am from the support team. I just took a look at your project and you could create a “Momentum Source” to represent the fan behavior instead of the MRF. Here is document explaning how to do it.

Changing the setup to a Momentum Source might also improve the heat distribution due to a new interation of fluid/solid.

Please keep us posted on the development of the model and do not hesitate to reach out!

Best,
Renan

3

Thank you for the answer @RPAlessio0 , also for the geometry of the shaft and fan itself should I let it be or keep deleted it after I substract it with the cylinder to make them rotating?

4

Hi @masagung30,

thanks for the quick reply!

I would leave it deleted at first and assign the appropriate “inner volume” to the fan momentum source. Let us know if that works out!

Best,
Renan

5

Thank you for the advice @RPAlessio0
, I have been try a new one but the simulation still resulting that the fan won’t spin, also the flow of air itself still linear and not rotating. Then the heat conduction from the rotor is not spreading into other components. Any advice for that problem? Thank you

10kW cok | SimScale Workbench

6

Hi @masagung30 ,

thank you for the update!

I will take a closer look at it and come back to you as soon as possible!

Best,
Renan

7

Hi @RPAlessio0, is there any update for the problem?

8

Hi @masagung30 ,

thank you for your message! I am running different options to try to get the fan volume to spin. As soon as I solve this issue, I will let you know.

Best,
Renan

9

Hi @masagung30

I believe the reason why the fan is not “spinning” is because only one point was set for the fan pressure curve (volumetric flow vs fan pressure). If you add more points to the curve, should work - this applying the cylinder as assign value for the momentum source.

Now, concerning the temperature distrubution. There seems to be a gap between the rotor and outer parts and the fluid in between does not transfer heat that well. On the other hand, there is contact between the rotor and the shaft, and the temperature distrubtion is smooth along the bodies.

I hope this helps. Let me know how it goes.

Best,
Renan

10

Thank you for the answer, for now the temperature of my electric motor is already going down and I also add some magnet on the rotor itself, but the connects geometry seem did not work perhaps because the heat is not transferring into the stator. also should I really connect the geometry for both of them? or is there any other solution?

10kW cok - Copy - Copy | SimScale Workbench

11

Hi @masagung30

if you want to enable direct heat conduction between two different solid parts, then they need to be in contact. Otherwise, if there is gap filled with fluid in between, that will play a role dissipating the heat.

Best,
Renan