Learning Forum

[LeoMereles]

Hi!

I'm trying to simulate de IPM of the Toyota Prius 2004 that appears in the complete guide of Ansys Maxwell.

Everything is ok, but, I do not know how to obtain the 400Nm. According to some other studies and pappers, this torque is obtained at 250Amp and 50 degrees in advance in the current (at 1200 RPM). But with this values, I'm getting around 250Nm (with a symettry multipplier of 16). Every parameter and the construction of the model is the same as appears in the guide.

Any ideas?

[NKC]

Hi @LeoMerelesnIf you are referring to some other literature we really can't see what you have modeled.nI suggest you cross-check all the design parameters that will affect the torque. Here are some suggestions to cross-check against the literature you are following.nMagnet properties, airgap, Number of winding turns, stack length, excitation current, etc.,nIf it is mentioned in the Ansys tutorial document, Please provide a screenshot of where in the Ansys tutorial the torque is presented as 400 NM @ 250A against what you got.nnRegardsnNavyan

[LeoMereles]

nnThanks for your response.nnI already checked all the parameters. My results are exact like the Maxwell manual, but, I'm asking because the rated torque at the rated current is 400Nm at 250A.nnThe papers I checked are the same used inthe manual, you can check the 3 references here:nn So if, according to the User's Guide, the results are ok and with the same current I'm getting the same results that the guide, why differs from the real results? According to the guide, 243Nm is the result for 250 A. My result is a little more because of the advance angle change (50° for the optimum results).nnBest regards,nLeon

[NKC]

HI @LeoMerelesnCan you also add a screenshot of the reference page where it showed 400 Nm @ 1200 rpm or rated speed.nI did see the third reference document in the references and it says max torque of 400 NM from 0 to 1540 rpm. So 400 Nm is not at rated speed.nThe test result also says 400 NM for 250A current is for locked rotor condition and it is not for the rated condition.nHope this clarifies your concernnnRegards,nNavyan

[LeoMereles]

,nnI understand the locked rotor torque, but it says maximum torque 400Nm between 0 and 1540 rpm. So, 400Nm is the maximum for the range, not only for locked rotor. That's my concern.nnBest regards, and thanks again.n

[LeoMereles]

I'm assuming that 400Nm it's the peak torque and not the rated torque.n

[LeoMereles]

There is any value in the User's Guido for the rated torque? According to the references, the peak torque it's achive at 250 amps.n

[NKC]

In the reference is the 250 A the max value of the current or the rms value?nWhat is used in the Ansys tutorial is Imax value. Can you cross-check that.nI assume that could be the reason for the difference.nnRegardsnNavyan

[NKC]

I suggest you also plot the full performance map by using the machine tool kit ACT extension.nThis will help you understand the full range of performance.nn

[LeoMereles]

nnI think 250A amplitude should produce 340 Nm of torque.n

[LeoMereles]

Any suggestions? I need to test this motor and obtain the same results, I think I'm close because I'm getting the same results that the User's guide, but I cannot relate those with the real tests.n

[NKC]

Though the motor lamination details are as per the Prius 2004 model, I am not sure if everything else (like the number of turns) is same as the original Motor. nAs This application has not been done with the collaboration of Toyota by Anysys.nHowever, let me cross-check this information with Anysys internal team. This is a pretty old example, I am not sure how quickly I can get confirmation on this.nMeanwhile, can you confirm if you find, anywhere in the references, the internal details of the motor (like the magnet material, number of turns e.tc.,) published?nAlso, you can also increase the number of conductors to 11 or 12 instead of 9 as mentioned in the tutorial to get the required torque, if that is a viable option.nnRegardsnNavyann

[LeoMereles]

thanks for your response.nnI think that every parameter is according to the real motor because it is public. According to this table:nnnThe rated power at 1200 RPM (which I'm simulating) is 21kW. For 230A RMS, the average torque is 284 Nm, and the power is 22,7 kW. Maybe that will help with the question.nnBut, in the reference also says that with 250A (DC) the torque rise to 340Nm wich I'm not obtaining. With 250Amp RMS the resulting toque is 295 Nm avg.nnRegarding to the change in the turns, I'm worried about the needing to change the values regarding the real motor to obtain similar results.Best regards.n