Mar 3, 2011 #1 K kavitha_rapolu Junior Member level 3 Joined Jan 4, 2008 Messages 26 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,281 Activity points 1,460 What does PHASE MARGIN of 95 or 130 mean? In otherwords, what does PM >90 mean? Is it ok to have?
Mar 4, 2011 #2 B Braski Full Member level 3 Joined Dec 22, 2009 Messages 154 Helped 32 Reputation 64 Reaction score 28 Trophy points 1,308 Location Florence (ITALY) Activity points 2,384 it means that you are very far from the sign inversion of the feedback, so it is ok.
Mar 4, 2011 #3 E enjunear Advanced Member level 3 Joined Dec 21, 2010 Messages 960 Helped 309 Reputation 618 Reaction score 303 Trophy points 1,343 Location USA, midwest Activity points 9,749 Agree with Braski. Generally you talk about phase margin when your feedback loop reaches a gain of zero. You want to maintain some positive phase margin at that point, such that you have "room to push/pull" in your feedback loop.
Agree with Braski. Generally you talk about phase margin when your feedback loop reaches a gain of zero. You want to maintain some positive phase margin at that point, such that you have "room to push/pull" in your feedback loop.
Mar 8, 2011 #4 M Milad-D Full Member level 3 Joined Jan 13, 2011 Messages 169 Helped 59 Reputation 118 Reaction score 58 Trophy points 1,308 Location Netherlands Activity points 2,189 Having high PM is good from stability point of view, but having huge PM will lead to slow system response which might be issue in some cases.
Having high PM is good from stability point of view, but having huge PM will lead to slow system response which might be issue in some cases.