P poosri Well-known member Joined Dec 16, 2009 Messages 49 Reaction score 7 Mar 30, 2015 #1 Why does one of the questions in test 4 in CI say DC machines do not have hysteresis losses? I thought the correct answer would be stray losses?
Why does one of the questions in test 4 in CI say DC machines do not have hysteresis losses? I thought the correct answer would be stray losses?
M MyBeardAndMe Well-known member Joined Jan 24, 2015 Messages 50 Reaction score 8 Mar 30, 2015 #2 Yeah, I had this same problem. Camara pg 42-3 lists losses in a motor... Hysteresis and stray losses exist in dc machines.
Yeah, I had this same problem. Camara pg 42-3 lists losses in a motor... Hysteresis and stray losses exist in dc machines.
I iwire Well-known member Joined Dec 11, 2012 Messages 789 Reaction score 89 Location NoVA Mar 31, 2015 #3 DC machines has hysteresis losses and Eddy Current loss as well. Both are part of the core losses. Stray losses exist in due to the distortion of flux because of armature reaction and short circuit current in coil.
DC machines has hysteresis losses and Eddy Current loss as well. Both are part of the core losses. Stray losses exist in due to the distortion of flux because of armature reaction and short circuit current in coil.
W Wildsoldier PE Well-known member Joined Aug 19, 2010 Messages 290 Reaction score 14 Apr 11, 2015 #4 I believe DC is not in the PE exam specifications...but is always good to understand DC as well.