Answer / babu lal kumawat

The Induction motor and the transformer basically works on
the same principle of electromagnetic induction, however
transformer is static electrical machine in which the power
is transfered from one circuit to another circuit keeping
the frequency constant. In case of induction motor its an
rotating transformer in which the frequency of stator is
the supply frequency(F) however the rotor frequency is not
same as that of stator frequency and it is slip times the
stator frequency(f').
f'= slip times(s)x stator frequency(F).

why induction generators are used in wind mills.why cant synchronous generators b used??

2 Answers  

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What is the minimum permissive IR value for LT & HT motor for safe starting?

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Can u explain : what is supply for train (whether a,c or d.c ).I know that supply is 25000v a.c .But there is rumour that supply is D.C. And also explain how lights and fans inside the trains are working ,and what type of motors are used in trains whether D.C motors or induction motors .If d.c motor, how it gets supply.If traction motors are used then what are traction motors and its functions and how it differs from other motors and also explain about locomotive . please reply..............

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how to identyfy cable sizes?

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In a transformer, the hysteresis and eddy current losses depend upon 1.load current 2.maximum flux density in core 3.type of lamination 4.supply frequency The correct statements are (a) 1 and 3 (b) 2 and 3 (c) 1 and 4 (d) 2 and 4

9 Answers  

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