A 4-pole machine running at 1500 r.p.m. has an armature with 80 slots and 6 conductors per pole. The flux per pole is 6 x 106 lines. Determine the terminal e.m.f. of d.c. generator if the coils are lap connected. If the current per conductor is 100 A, determine the electrical power
If you are noticing some error in problems kindly comment below.Thanks
Given
No of poles, P = 4
Rpm, N = 1500
No of slots = 80
Conductor per pole = 6
Flux per pole ø = 0.06 Wb
Current per conductor I = 100 A
To find
1. Terminal EMF
2. Power
Solution
Total number of conductors Z = 80 x 6
= 480
Total current = 100 x 4 = 400 A
No of parallel path = No of poles (LAP WINDING)
A = P = 4
1. Terminal EMF , E = ( ø x Z x N/ 60) x (P /A)
= (0.06 x 480 x 1500 / 60 ) x (4 / 4)
= 720 V
2. Power = E x I
= 720 x 400
= 288 kW
If you are noticing some error in problems kindly comment below.Thanks
Given
No of poles, P = 4
Rpm, N = 1500
No of slots = 80
Conductor per pole = 6
Flux per pole ø = 0.06 Wb
Current per conductor I = 100 A
To find
1. Terminal EMF
2. Power
Solution
Total number of conductors Z = 80 x 6
= 480
Total current = 100 x 4 = 400 A
No of parallel path = No of poles (LAP WINDING)
A = P = 4
1. Terminal EMF , E = ( ø x Z x N/ 60) x (P /A)
= (0.06 x 480 x 1500 / 60 ) x (4 / 4)
= 720 V
2. Power = E x I
= 720 x 400
= 288 kW
Here no of conductors=6 pole/conductor,so,z=6*4=24
ReplyDeleteIf question given 6conductor/slots then z=80*6=480
Z=
Please confirm. In all types of these problems in Thereja book it is considered Z = Total no of conductors with regard to no of slots. They considered Z irrespective of poles.
Deletesame problem above plz suggest me also.
ReplyDeletePlease confirm. In all types of these problems in Thereja book it is considered Z = Total no of conductors with regard to no of slots. They considered Z irrespective of poles.
DeleteIt is a little confusing, not only because of Z but also we have 100 A per conductor as in question. But we take it as 100 A per pole. Confusing.
ReplyDelete