Solid vs Stranded winding resistance

- March 9, 2020 at 12:51 pm
  
  DillanOckhuis
  Subscriber
  
  I have an inquiry as to how Ansys Electronics desktop 2019 determines the resistance of SOLID windings in a 2D transient solution.
  
  My main issue revolves around what causes the marked difference in torque (i.e., resistance) between Ansys' two winding selections, even at relatively low frequencies?
  
  As I understand it, in the case with STRANDED windings, Ansys does not take eddy current and skin effects into account during the transient solution as the user-given winding resistance is unaffected by frequency. However, with SOLID windings, a user-given resistance is not required and Ansys calculates the resistance in the conduction path during the transient solution.
  
  However, how exactly that SOLID winding resistance is determined is unknown and one would expect the resistance to be similar to that of the STRANDED winding case, especially at low frequencies which is not the case
  
  Any guidance and assistance will be appreciated.
  
  Thank you in advance
- March 18, 2020 at 10:40 am
  
  CB
  Ansys Employee
  
  Hi,
  
  There can be several reasons why there are differences in the torque results but basically
  
  1) Transient can handle nonlinearity properties while eddy can not
  
  2) In the transient analysis not all the eddy current is taken into account
  
  Both solvers can reach the same result as long as you set the criteria correctly. If you look at the Maxwell Help document there is more details on the solver types and setup.