Laboratory
Assignments
Semester : 7TH Electrical
Subject: Design of AC Machines (2170909)
Draw & write the following Assignments from the
book “ELECTRICAL MACHINE DESIGN “ by A.
K. Sawhney
SHEET NO. 1 & 2
Draw the following parts of three phase induction motor
in SHEETS
|
10.3,10.7,10.10,10.14,10.15,10.16,10.27,10.36,10.41,10.43
|
SHEET NO. 3 & 4
Draw
the following parts of three phase synchronous machine in SHEETS
|
12.2,12.3,12.4,12.8,12.9,12.10,12.13,12.14,12.15,12.16,12.17,12.18
|
SHEET NO. 5
Draw the ROTOR
& STATOR of induction machines in sheet as per the dimensions calculated
from the problem no. 1
SHEET NO. 6
Draw the
ROTOR & STATOR of synchronous machines in sheet as per the dimensions
calculated from the problem no. 2
SHEET NO. 7
Draw the circle diagram for 5HP, 200V, 50Hz,
3-ɸ, 4-pole, star connected induction motor from the following data: Also
calculate power factor, F.L. current, % slip, Efficiency, Max. Torque, Max.
Output etc.
|
O.C. Test
|
200V
|
5A
|
350W
|
|
S.C. Test
|
100V
|
26A
|
1700W
|
Write the following solved examples from
the book “ELECTRICAL MACHINE DESIGN “ by
A. K. Sawhney in file page with data sheet
(1)Design
problem-1
Design a 2.2KW, 400V, 3-ɸ, 50Hz, 1500rpm squirrel cage induction motor.
The machine is to be started with star-delta starter; the efficiency &
power factor are 0.8 & 0.825 respectively. Assume cheap design.
(2)Design
problem-2
Design a water wheel generator with the following specifications:
KVA=3000, Phase=3, Voltage=6600V,
Frequency=50Hz, Connection=star, RPM=187.5,
P.F.=0.8lag
Design problems
NOTE : (1) Solve
the following problems as per solution of
above Design
problem no 1. Given in A. K. Sawhney book
(2)Problem
distribution as per Batch…. Like, A1-1, A2-2, A3-3, A4-4,
A5-5, B1-6, B2-7,
B3-8, B4-9 & B5-10
(1)
Design a 5HP, 440v, 50Hz, 1500rpm, 3-ф squirrel
cage induction motor. Assume that: specific magnetic loading=0.46wb/m2,
specific electric loading=22000ac/m, Efficiency=83%, power factor=0.84, stator
winding factor=0.955. Suggest for cheap design.
(2)
Design a 30HP, 440V, 50Hz, 1000rpm,3-ф squirrel
cage induction motor. Assume that: specific magnetic loading=0.45wb/m2,
specific electric loading=25000ac/m, Efficiency=86%, power factor=0.87, stator
winding factor=0.955. Suggest for overall good design.
(3)
Design a 10HP, 440V, 3-Phase, 4-pole, 50Hz
squirrel cage induction motor which is to be started using a star-delta
starter. Assume:-Average flux density in the gap=0.45wb/m2, Ampere conductors
per meter=23000, efficiency=0.85, Power factor=0.84, stator winding
factor=0.955. Choose the main dimension to give an overall good design.
(4)
Design a 5HP, 440v, 50Hz, 1500rpm, 3-ф squirrel
cage induction motor. Assume that: specific magnetic loading=0.44wb/m2,
specific electric loading=24000ac/m, Efficiency=83%, power factor=0.84, stator
winding factor=0.955. Suggest for cheap design.
(5)
Design a 15HP, 440V, 3-Phase, 4-pole, 50Hz
squirrel cage induction motor which is to be started using a star-delta
starter. Assume:-Average flux density in the gap=0.42wb/m2, Ampere conductors
per meter=26000, efficiency=0.84, Power factor=0.84, stator winding
factor=0.955. Choose the main dimension for good power factor.
(6)
Design a 20HP, 440V, 3-Phase, 6-pole, 50Hz
squirrel cage induction motor which is to be started using a star-delta
starter. Assume:-Average flux density in the gap=0.42wb/m2, Ampere conductors
per meter=26000, efficiency=0.87, Power factor=0.86, stator winding
factor=0.955. Choose the main dimension for good Efficiency.
(7)
Design a 15HP, 440v, 50Hz, 1500rpm, 3-ф squirrel
cage induction motor. Assume that: specific magnetic loading=0.44wb/m2,
specific electric loading=24000ac/m, Efficiency=83%, power factor=0.84, stator
winding factor=0.955. Suggest for cheap design.
(8)
Design a 10HP, 440V, 3-Phase, 4-pole, 50Hz
squirrel cage induction motor which is to be started using a star-delta
starter. Assume:-Average flux density in the gap=0.42wb/m2, Ampere conductors
per meter=26000, efficiency=0.84, Power factor=0.84, stator winding
factor=0.955. Choose the main dimension for good power factor.
(9)
Design a 30HP, 440V, 3-Phase, 4-pole, 50Hz
squirrel cage induction motor which is to be started using a star-delta
starter. Assume:-Average flux density in the gap=0.41wb/m2, Ampere conductors
per meter=23000, efficiency=0.85, Power factor=0.84, stator winding
factor=0.955. Choose the main dimension to give an overall good design
(10)Design a 20HP, 440V,
3-Phase, 6-pole, 50Hz squirrel cage induction motor which is to be started
using a star-delta starter. Assume:-Average flux density in the gap=0.42wb/m2,
Ampere conductors per meter=25000, efficiency=0.88, Power factor=0.86, stator
winding factor=0.955. Choose the main dimension for good Efficiency.
