why field resistance is higher than armature resistance in
dc machines? and why filed resistance is kept at min value
at starting in same time of armature resistance at max value?
Answer Posted / abdelbaset
because the consumable power in the field circuit assuming
the same voltage of the main circuit is lower than the
armature circuit. so the excitation current is lower than
armature current so field resistance is greater than
armature resistance
Is This Answer Correct ? | 11 Yes | 16 No |
Post New Answer View All Answers
How we select the vector group of 3phase power transformer?
How to derive detailed design of Suitable bus Bar for 100A for 6.6KV?
Why do we need a separate control desk & PLC control panel in Boiler plant or coal handling plant? Can we provide cost effective Control desk cum PLC panel. Is there is an specific need for control desk.. kindly advice.
how to calculate the capacitor to maintain power factor?
How to know about the rating(voltage and other) of induction motor if its name plate is missing at the manufacturing site.
hi frnz,can somebody give me any project work? i am a 2nd year student & interested in practical works...plz give me some projects
how to interlock 3 incomer-ACB,1 buscoupler ACB,... pls answer this question and if possible send me the ckt diagram..haifriends2910@gmail.com
Where burned of electricity,when,who, & why.
which protection function should measure RMS value of current&DFT value of current?
how to calculate the surge level of surge suppressors related to the SF6 cicuit breakers?
what is the minimum requirement gigaohms for the insulation test using 5kv in 300mm xlpe cable
What is the meaning of C1, C61, C91 cable
how will reduce the voltage. if 12volt/250ma transformer toreduce 6 volt
what is the ground fault relay,which purpose it will be use,clearly tell me plz
How to calculate Grid rotor resistance(GRR) losses in slip ring induction motor?