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博客园 - 斑鸠，一生。

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Maxwell StrandedLoss and StrandedLossAC difference
斑鸠，一生。 · 2026-03-12 · via 博客园 - 斑鸠，一生。

2026-03-12 15:23  斑鸠，一生。  阅读(143)  评论()    收藏  举报

一、Ansys define

For 2DXY designs, the length is given by Set Model Depth, while for RZ designs the volume is based upon the rotation of the cross-section around the symmetry axis.

There are three types of stranded loss quantities: StrandedLoss, StrandedLossAC, and StrandedLossR, which represent the loss in a 2D or 3D winding utilizing multi-turn coil terminals.

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

image

  • When Litz wire is not defined, StrandedLoss is computed by assuming fill factor = 100% (the ratio of net conductor area to coil terminal area).
  • 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.
  • StrandedLoss does not include the losses of end-coil resistance in 2D.
  • 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.

  • StrandedLossAC = StrandedLoss + AC eddy current losses due to proximity effects and skin effects.
  • StrandedLossAC does not include the losses of end-coil resistance in 2D.
  • 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)

二、Maxwell Setup

image

image

三、Example

　　从同一个模型的仿真结果可以看出，StrandedLossAC 比StrandedLoss 大

image

image

四、Conclusion

　　StrandedLoss 仅包含直流（DC Loss）损耗结果，StrandedLossAC 包含直流加交流损耗（AC+DC Loss）结果。

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