Question

An 8 pole lap connected armature has 40 slots with 12 conductor per slot generates a voltage of 500 volt. Determine the speed at which it is running if the flux per pole is 50 miliweber​

Answer 1

The speed will be equal to 1250 rpm.

Given:

Pole = 8

Slot = 40

Conductor per slot = 12

Total conductor = 12*40 = 480

E = 500V

Flux = 50 mWb = 50*$10^{-3}$ Wb

To Find:

The Speed

Solution:

It is very easy to answer this question as given below

We know that,

E = $\frac{NP(Flus) Z}{60A}$

On rearranging,

N = $\frac{E*60*A}{N*P*(Flux)*Z}$

On substituting the given values,

We will get,

N = $\frac{500*60*8}{8*50*10^{-3}*480 }$

N = $\frac{240000}{192}$

N = 1250 rpm

Hence, the speed will be equal to 1250 rpm.

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