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Tua
Intermediate Member
33 years old
Gender Not Set
RUSSIA, Novosibirsk
Born Dec-29-1976
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Joined: 2-March 06
Profile Views: 399*
Last Seen: 21st August 2009 - 05:09 AM
Local Time: Mar 16 2010, 04:41 AM
34 posts (0.02 per day)
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20 Aug 2009
Dear All!
I can't find explanation for Motor slip. I work for one foreign company in Russia and now I need to translate a document and for me it is not clear what is "Motor slip". Part of text "Speed accuracy is 10% of the motor slip, which with an 11kW motor, equals 0.3% static speed accuracy. With a 110kW motor, speed accuracy is 0.1% without encoder (open-loop)." Please help me. It will be better if some body puts a picture of mechanical curve of induction motor together with explanation of Motor slip. Your truly!
30 May 2008
Dear!
Who can tell or explain me which kind of protection should I use to protect the DC motor? For example: 1. Very impotant! Minimal current relay in excitor circuit diagram which must be referenced with contactor in armature circuit diagram? Customer forces me to connect this relay with circuit-breaker in armature circuit diagram, but in my understanding of protection it can't be like that. 2. Circuit-breaker in excitor circuit diagram. 3. Circuit-breaker in armature circuit diagram. Again customer wants to use additional electo-magnetic maximal current relay in armature circuit diagram which will be referenced with circuit-breaker in armature circuit diagram to protect motor from inrush current. But I think no need to use this one, because normally the armature circuit-breaker already has this kind of protection inside. If anybody has experience in that area, please, help me! |
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Lo-Fi Version | Time is now: 15th March 2010 - 10:41 PM |
