Nov 6, 2014 #1 Y ykykouai Newbie level 4 Joined Feb 11, 2013 Messages 5 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,281 Activity points 1,311 Hi, Here is the question. I want to calculate a trace resistance with a 20khz PWM current. I use the DC resistance way to do it. Like R=ρ*L/A. Is it okay? Or there is any suggestion?
Hi, Here is the question. I want to calculate a trace resistance with a 20khz PWM current. I use the DC resistance way to do it. Like R=ρ*L/A. Is it okay? Or there is any suggestion?
Nov 6, 2014 #2 FvM Super Moderator Staff member Joined Jan 22, 2008 Messages 52,414 Helped 14,749 Reputation 29,780 Reaction score 14,097 Trophy points 1,393 Location Bochum, Germany Activity points 298,073 The short version: Skin depth for copper conductors at 20 kHz is about 0.5 mm, so you can calculate with DC resistance in first estimation. The long version: The conductor geometry must be considered, proximity effect can become relevant in some cases.
The short version: Skin depth for copper conductors at 20 kHz is about 0.5 mm, so you can calculate with DC resistance in first estimation. The long version: The conductor geometry must be considered, proximity effect can become relevant in some cases.