Copper loss in synchronous reluctance motor

- April 9, 2023 at 1:24 am
  
  sampathkumar
  Subscriber
  
  I observe three losses related to copper loss in Ansys Maxwell simulation like stranded, stranded AC, strandedR.i use strands in my winding...can you please tell which one should I consider to calculate efficiency
- April 11, 2023 at 8:31 pm
  
  GLUO
  Ansys Employee
  
  Hi @sampathkumar,
  You could use stranded loss, however, AC effect is not considered. If you use Litz wire model in your material of the winding, you could use StrandedLossAC.
  •             StrandedLoss is dependent on the object’s material conductivity of a stranded source. It represents the loss due to the DC resistance only and uses the cross-sectional area of the object that is assigned with the excitation. Where J is the current density, it is calculated by:
  
  o             When Litz wire is not defined, StrandedLoss is computed by assuming fill factor = 100% (the ratio of net conductor area to coil terminal area).
  o             When Litz wire is defined, StrandedLoss is computed by using the actual fill factor based on the specified Litz stranding and represents the DC loss only.
  o             StrandedLoss does not include the losses of end-coil resistance in 2D.
  o             StrandedLoss can be used to scale the loss density to a coupled thermal analysis.
  •             StrandedLossAC is reported when using Litz wire model, and is dependent on the object’s material conductivity of a stranded source. It represents the loss due to the DC resistance as well as AC eddy current losses due to proximity effects and skin effects.
  o             StrandedLossAC = StrandedLoss + AC eddy current losses due to proximity effects and skin effects.
  o             StrandedLossAC does not include the losses of end-coil resistance in 2D.
  o             StrandedLossAC can be used to transfer loss density to a coupled thermal analysis.
  •             StrandedLossR represents the loss based on I2 times the resistance R, by using the resistance value entered in the Winding properties for a voltage type winding only (Reported for a stranded voltage source not in an external circuit).
  GL

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