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holo

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About holo

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  1. WOW thanks a lot!!! That explains everything. I needed to sum the 3 graphs of power, it makes sense now. I still can't believe I have 97% efficiency with this thing lol I'll double check it. Have a good day.
  2. Just to be sure, this is how I'm doing the power balance right now (the numbers are rounded): Torqueelectromag(mechanicalset rotor) = 27Nm average Mechanical_power= 27Nm*1500*2*PI()/60 =4200W ** PowerP(current source) over a period = 2100W rms value * 3 current sources =6300W = P_input Then I calculate the joule losses on the stranded coil conductors with a sensor. It gives a triphasic sine wave that goes from 0 to 9W . The sum of the 3 waves is about 13W constant. The same but for the resistors that I put into the circuit: sine wave with 30W peak. the sum of 3 waves is 45W constant. Bertotti losses = 2,56W Since you mention I need to multiply by four, the end result should be like: P_input = 4200W + 13W*4 + 45W*4 + 2,56W *4 = 4442 W P_input from current sources = 6300W diference = 1800W **Considering mechanical losses=0. Also, the motor is running at 1500rpm.
  3. Thanks for answering, I've simulated a quarter and applied the periodicity to obtain the full motor. My actual bertotti losses are 2,58W * 4 quarters = 10W and I think it's too low. I'm not sure what I'm calculating incorrectly. I think I'm also mixing things up because I'm not sure when I need to multiply by 4 and when I don't need to. https://send.firefox.com/download/25f117c80a3e1ff3/#UjuguY_jRnr6PvaRreOgfg This is the link of my solved flu project. I did it on FLux 2018. On the advanced menu you can see the power balance macro, it came integrated on the software.
  4. Thanks for answering, I've simulated a quarter and applied the periodicity to obtain the full motor. My actual bertotti losses are 2,58W * 4 quarters = 10W and I think it's too low. I'm not sure what I'm calculating incorrectly. I think I'm also mixing things up because I'm not sure when I need to multiply by 4 and when I don't need to. https://send.firefox.com/download/25f117c80a3e1ff3/#UjuguY_jRnr6PvaRreOgfg This is the link of my solved flu project. I did it on FLux 2018. On the advanced menu you can see the power balance macro, it came integrated on the software.
  5. Also, I have a question regarding the Bertotti losses. It computes the average iron losses over a period but.. does it take into account the length of the motor or it just computes the loses on one slice of steel? Basically what I'm asking is, do I need to multiply the average losses * length of motor / thickness of steel slice to obtain the iron losses of the full motor?
  6. I'm trying to execute a power balance over a full electric period of a 4 pole motor (180 mechanical degrees) but I get an error : evaluateInstances : Execution failed. Failed execution Failed to create a new instance of Power Balance. BP_ERES => Wrong parameter BP_ERES => failed... BP_FNUM => Evaluation interrupted BAFOC2_1 => Evaluation failed BAFOC2 => Evaluation failed BAFOCC => Evaluation aborted evaluateInstances => failed stdcom.error.SoftwareFortranException: evaluateInstances : Execution failed. Failed execution at cad.core.common.error.ErrorManager.createFortranException(ErrorManager.java:153) at cad.flux.kernel.dbmanager.FGCProjectDbWrapper.evaluateInstances(Native Method) at cad.flux.kernel.dbmanager.FGCProjectDbAdapter.evaluateInstances(FGCProjectDbAdapter.java:1004) at cad.flux.kernel.dbmanager.FGCProjectDbAdapter.evaluateProjectInstances(FGCProjectDbAdapter.java:961) at cad.core.kernel.dbmanager.DbManager.evaluateProjectInstances(DbManager.java:2081) at cad.core.kernel.components.TransactionCreateInstance.processDBEvaluation(TransactionCreateInstance.java:416) at cad.core.kernel.components.TransactionCreateInstance.commit(TransactionCreateInstance.java:330) at cad.core.kernel.components.TransactionManager.commit(TransactionManager.java:292) at cad.core.kernel.components.TransactionManager.processTransactionCreateInstance(TransactionManager.java:652) at cad.core.kernel.components.TransactionManager.newProjectInstance(TransactionManager.java:739) at cad.flux.kernel.FGSupervisor.newProjectInstance(FGSupervisor.java:3502) at sun.reflect.GeneratedMethodAccessor378.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.python.core.PyReflectedFunction.__call__(PyReflectedFunction.java:186) at org.python.core.PyReflectedFunction.__call__(PyReflectedFunction.java:204) at org.python.core.PyObject.__call__(PyObject.java:507) at org.python.core.PyObject.__call__(PyObject.java:511) at org.python.core.PyMethod.__call__(PyMethod.java:156) at pydb$py.newObject$203(pydb.py:1586) at pydb$py.call_function(pydb.py) at org.python.core.PyTableCode.call(PyTableCode.java:167) at org.python.core.PyBaseCode.call(PyBaseCode.java:170) at org.python.core.PyFunction.__call__(PyFunction.java:434) at org.python.core.PyMethod.__call__(PyMethod.java:156) at pydb$py.__call__$159(pydb.py:1261) at pydb$py.call_function(pydb.py) at org.python.core.PyTableCode.call(PyTableCode.java:167) at org.python.core.PyBaseCode.call(PyBaseCode.java:307) at org.python.core.PyBaseCode.call(PyBaseCode.java:198) at org.python.core.PyFunction.__call__(PyFunction.java:482) at org.python.core.PyMethod.instancemethod___call__(PyMethod.java:237) at org.python.core.PyMethod.__call__(PyMethod.java:228) at org.python.core.PyMethod.__call__(PyMethod.java:223) at org.python.core.PyObject.invoke(PyObject.java:3697) at org.python.core.PyInstance.instance___call__(PyInstance.java:377) at org.python.core.PyInstance.__call__(PyInstance.java:372) at org.python.core.PyObject.__call__(PyObject.java:405) at org.python.pycode._pyx113.f$0(<input>:1) at org.python.pycode._pyx113.call_function(<input>) at org.python.core.PyTableCode.call(PyTableCode.java:167) at org.python.core.PyCode.call(PyCode.java:18) at org.python.core.Py.runCode(Py.java:1398) at org.python.core.Py.exec(Py.java:1442) at org.python.util.PythonInterpreter.exec(PythonInterpreter.java:276) at cad.core.kernel.components.PythonWrapper.runCode(PythonWrapper.java:628) at cad.core.kernel.components.PythonWrapper.runsource(PythonWrapper.java:623) at cad.core.kernel.components.PythonWrapper.runsource(PythonWrapper.java:598) at cad.core.kernel.components.PythonWrapper.runsource(PythonWrapper.java:593) at cad.core.kernel.components.PythonWrapper.execute(PythonWrapper.java:638) at cad.core.kernel.components.PythonWrapper.executeNewCommand(PythonWrapper.java:756) at cad.core.kernel.KernelModule.executeNewCommand(KernelModule.java:104) at cad.core.kernel.actions.implementation.type.CreateInstanceAction.doAction(CreateInstanceAction.java:108) at cad.core.common.dynamic.actions.UIActionManager.postAction(UIActionManager.java:145) at cad.core.common.dynamic.actions.UIActionManager.postAction(UIActionManager.java:274) at cad.core.kernel.KernelCommon.postAction(KernelCommon.java:306) at cad.core.kernel.encoder.ActionServerRequestsInputPlug.postAction(ActionServerRequestsInputPlug.java:88) at cad.core.kernel.encoder.ActionServerRequestsInputPlug.postAction(ActionServerRequestsInputPlug.java:82) at stdcom.protocole.actionserverrequests.ActionServerRequestsRouter.postAction(ActionServerRequestsRouter.java:70) at stdcom.protocole.actionserverrequests.ActionServerRequestsOutputPlug.postAction(ActionServerRequestsOutputPlug.java:96) at cad.core.frontal.decoder.FrontalDecoder.postAction(FrontalDecoder.java:464) at cad.flux.frontal.actions.implementation.algo.postpro.ExecuteEntityWithResult.postAct(ExecuteEntityWithResult.java:63) at cad.core.frontal.actions.implementation.type.CreateInstanceAction.interpret(CreateInstanceAction.java:309) at cad.core.frontal.components.box.frontaldialog.FrontalDescriptorDialogBox.internalRun(FrontalDescriptorDialogBox.java:296) at cad.core.frontal.frontalthread.WorkerThread.executeImplementer(WorkerThread.java:226) at cad.core.frontal.frontalthread.WorkerThread.run(WorkerThread.java:274) Also I'm having a hard time calculating the power balance manually. Because FLUX tells me that the power input is 6000W and the mechanical output is 4200W, however when I sum the joule losses+ the bertotti losses I get 4200+400=4600W. So where are the others 1400W (6000-4600) ? I'm nearly sure I'm calculating it correctly. But I'm asking because I'm new to flux and I'm still understanding how it works. Is this difference normal or I am missing something? I can give you my solved flu project, but I'd have to send it directly to you since the link expires after one download Thanks, have a good day!
  7. Alright thank you! I left it for a while and I could finally see some results. However I find it really weird, since with other motors I reach steady state instantly.
  8. I want to simulate an Induction Motor using current sources on flux. The circuit I'm using it's attached on a picture. Right now I've set the current sources with sinusoidal waves of current I_a=10*sin(100*pi()*TIME) and I_b=10*sin(100*pi()*TIME-(2*pi()/3)). However the electromagnetic torque curve gives really odd results. I've attached the Flu file of this motor as well, so you can hopefully find my error cause I'm lost. I know I can use steady state ac magnetic 2d to simulate this kind of motor, but I wanted to use transient magnetic. Thanks for your time, Have a good day. induccion.FLU.zip
  9. Error with transient thermal - transient magnetic cosimulation. I´ve created the simulation following the flux documentation but after solving I get an error on the thermal side : BPR_RIDENT => REFPRO not found BPR_RIDENT => failed BPR_BSIMPLE => failed Also I can't see any result. The temperature remains constant.
  10. I'm doing a transient magnetic - steady state thermal cosimulation of a motor. I've set everything following the flux guide and started solving the problem. However on the thermal side I get an error saying "Unable to calculate torque : there is no air zone around mechanical set : MECHANICALSET_ROTOR". I didn't have this problem on the magnetic side and I had previously solved the transient magnetic problem and got a torque value correctly. What am I doing wrong here? By the way, the airgap is set manually to an air material that I have created that has similar properties to air. I think I did this because in the past I had problems when I set the airgap to be compressible air (or something like that).
  11. Thanks everyone! I've already managed to do it correctly. And @sts1983 I'll try your idea next time. It seems much easier and intuitive than creating a mesh line.
  12. Hello I've created a pyflux script with flux to generate a motor geometry. I was wondering what are the license limitations and if I could post it online so that others could use it. Thanks, have a good day.
  13. Nevermind, I found the error. I needed to set all face regions with the same parameters, then it worked somehow. I'm trying to create a cosimulation with a Steady State Magnetic 2D project and a Steady State Thermal 2D project. The magnetic project is going well, I reach the step 4 in the guide that's on the documentation but I'm having a hard time with the thermal project. I've deleted the circuit physics of the project and then deleted the application type to create a new type with Steady State Thermal. I've already set everything regarding materials and mechanical sets. I've created the Spatial Quantity JOULE and I've updated the definition of the Face Regions for the coils. Right now I'm not sure what I'm doing wrong... Do you have any guide about thermal analysis with flux? This is the output of the error that happens when I execute "Check Physics": OCRI04 => Number RB.F3D.THERMIQUE_SURF_2D_I(0) out of bounds OCRI04 => Retrieval of INTEGER attribute aborted RG_R_OPAQ => failed RGFMA1 => Failed RGFTOU => failed FL6VPB => Failed ... FL6VPB_1 => Failed ... executeAlgo_c => failed stdcom.error.SoftwareFortranException: executeAlgo_c : Execution failed. Failed execution at cad.core.common.error.ErrorManager.createFortranException(ErrorManager.java:153) at cad.flux.kernel.dbmanager.FGCProjectDbWrapper.executeAlgo(Native Method) at cad.flux.kernel.dbmanager.FGCProjectDbAdapter.executeAlgo(FGCProjectDbAdapter.java:883) at cad.flux.kernel.dbmanager.FGCDbManager.executeAlgo(FGCDbManager.java:151) at cad.flux.kernel.FGSupervisor.executeNativeCommand(FGSupervisor.java:2153) at cad.core.kernel.Supervisor.executeCommand(Supervisor.java:1978) at sun.reflect.GeneratedMethodAccessor367.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.python.core.PyReflectedFunction.__call__(PyReflectedFunction.java:186) at org.python.core.PyReflectedFunction.__call__(PyReflectedFunction.java:204) at org.python.core.PyObject.__call__(PyObject.java:507) at org.python.core.PyObject.__call__(PyObject.java:511) at org.python.core.PyMethod.__call__(PyMethod.java:156) at pydb$py.executeCommand$199(pydb.py:1560) at pydb$py.call_function(pydb.py) at org.python.core.PyTableCode.call(PyTableCode.java:167) at org.python.core.PyBaseCode.call(PyBaseCode.java:170) at org.python.core.PyFunction.__call__(PyFunction.java:434) at org.python.core.PyMethod.__call__(PyMethod.java:156) at pydb$py.__call__$172(pydb.py:1375) at pydb$py.call_function(pydb.py) at org.python.core.PyTableCode.call(PyTableCode.java:167) at org.python.core.PyBaseCode.call(PyBaseCode.java:307) at org.python.core.PyBaseCode.call(PyBaseCode.java:198) at org.python.core.PyFunction.__call__(PyFunction.java:482) at org.python.core.PyMethod.instancemethod___call__(PyMethod.java:237) at org.python.core.PyMethod.__call__(PyMethod.java:228) at org.python.core.PyMethod.__call__(PyMethod.java:223) at org.python.core.PyObject.invoke(PyObject.java:3697) at org.python.core.PyInstance.instance___call__(PyInstance.java:377) at org.python.core.PyInstance.__call__(PyInstance.java:372) at org.python.core.PyObject.__call__(PyObject.java:456) at org.python.core.PyObject.__call__(PyObject.java:460) at org.python.pycode._pyx324.f$0(<input>:1) at org.python.pycode._pyx324.call_function(<input>) at org.python.core.PyTableCode.call(PyTableCode.java:167) at org.python.core.PyCode.call(PyCode.java:18) at org.python.core.Py.runCode(Py.java:1398) at org.python.core.Py.exec(Py.java:1442) at org.python.util.PythonInterpreter.exec(PythonInterpreter.java:276) at cad.core.kernel.components.PythonWrapper.runCode(PythonWrapper.java:628) at cad.core.kernel.components.PythonWrapper.runsource(PythonWrapper.java:623) at cad.core.kernel.components.PythonWrapper.runsource(PythonWrapper.java:598) at cad.core.kernel.components.PythonWrapper.runsource(PythonWrapper.java:593) at cad.core.kernel.components.PythonWrapper.execute(PythonWrapper.java:638) at cad.core.kernel.components.PythonWrapper.executeFunction(PythonWrapper.java:706) at cad.core.kernel.encoder.CommandServerRequestsInputPlug.executeCommand(CommandServerRequestsInputPlug.java:79) at stdcom.protocole.commandserverrequests.CommandServerRequestsRouter.executeCommand(Unknown Source) at stdcom.protocole.commandserverrequests.CommandServerRequestsOutputPlug.executeCommand(Unknown Source) at cad.core.frontal.decoder.FrontalDecoder.executeCommand(FrontalDecoder.java:690) at cad.core.frontal.actions.implementation.GeneralAction.executeBox(GeneralAction.java:286) at cad.core.frontal.actions.implementation.GeneralAction.act(GeneralAction.java:228) at cad.core.frontal.actions.implementation.ModlessImplementer.internalRun(ModlessImplementer.java:60) at cad.core.frontal.frontalthread.WorkerThread.executeImplementer(WorkerThread.java:226) at cad.core.frontal.frontalthread.WorkerThread.run(WorkerThread.java:274)
  14. Thanks for answering.. But I was wondering if theres a way to create a 2d curve with the first harmonic module on the Y axis and different values of an I/O parameter on the X axis. Right now I can do the fft spectrum separately for each value of the I/O parameter but I don't know how to do a 2d curve with the values I mentioned earlier.
  15. I want to create a 2D curve with the values of the first harmonic of TorqueElecMag(ROTOR) to see how it changes with an I/O Parameter. Is that possible?
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