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Question
how can you calculate the value of external resistance 
inserted in a slipring industion motor? (eg. 110 kw / 990 
rpm/50Hz/stator v-415/stator Amp-195/Rotor V-440/Rotor amps-
151.)
 Question Submitted By :: Purushottam
I also faced this Question!!     Rank Answer Posted By  
 
  Re: how can you calculate the value of external resistance inserted in a slipring industion motor? (eg. 110 kw / 990 rpm/50Hz/stator v-415/stator Amp-195/Rotor V-440/Rotor amps- 151.)
Answer
# 1
Formula: K= 
R.V/1.73R.A     
where R.V=Rotor 
voltage , 
R.A=Rotor 
Current , 
K=constant  , 
than  
1step=1.40K   , 
2step=.35K  , 
3step=.15K  , 
4step=.08K  now 
put the data and 
get your ans.
 
Is This Answer Correct ?    4 Yes 0 No
Rakesh Patel
 

 
 
 
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