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munguni
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Join Date: Jun 2012
Posts: 6

Machine Design Problem

02/07/2013 2:58 AM

examine possible armature windings to suit a proposed d.c machine given that P=4,E=510,N=5rev/ps, D=1.36m, Tc=1 (tuns per coil),slot pitch=3cm, B=.52T, 2/3<L<YB,... If the full load current Ia=1500 amps, calculate ac and the ampere turns/armature reaction pole at full load.
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TonyS
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#1

Re: machine design problem

02/07/2013 6:07 AM

The idea of homework is for you to think about the problem and provide you're own answers.

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7anoter4
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#2

Re: Machine Design Problem

02/07/2013 9:05 AM

Some of data needs explanations:

P=4[kw?] is it rated or inner power?

L=rotor total [ideal] length or L[lambda] =li/tau [tau=pi*D/ (2*p)]?

YB=winding turn width in no.of slots? And what "ac" could be, amperes.cm or else?

There are symbols without explanation.

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munguni
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Join Date: Jun 2012
Posts: 6
#3

Re: Machine Design Problem

02/07/2013 9:31 AM

i am very sorry for sending a question without explained symbols...p= number of poles, E= terminal voltage,,N= speed, D= diameter of the rotor,L=rotor length,,,,B=Magnetic flux density,,and the last part to read,,,,2/3Y< L <Y where Y=pole pitch
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