Brief discuss the operation of a split phase single phase single
induction motor with respect to...
Brief discuss the operation of a split phase single phase single
induction motor with respect to its construction, current
relationship and torque characteristics. Illustrate your answer by
means of diagram
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Electric Machinery
What are the advantages of using three-phase induction
motor as compared to single phase induction motors?
please write it with long details and with clear written
What is the difference between a capacitor- start split-phase
motor and a permanent-split capacitor motor? Briefly explain some
of the differences between them including advantage and
disadvantages of each.
The single-phase equivalent-circuit parameters for a three-phase
induction motor in ohms-per-phase are
R1=0.17 R2=0.24 X1=1.05
X2=0.87 Xm=82.1 Rc=435
For a slip of 5 percent, and a terminal voltage of 460 V, line
to line, calculate:
A) Calculate the motor phase current and input real and reactive
power.
B) Calculate the mechanical output power and the power
dissipated in the rotor. You might assume that the motor friction
and windage losses are 270W
C) Calculate the motor core loss and the...
1. The split phase motor is used to _____.
a. provide mechanical drive to the DC motor
b. produce DC voltage directly
c. provide a load for the DC motor
d. serve as a control device.
2. The purpose of the rheostat in the DC motor in this
application is to ____.
a. prevent the series winding from being burned out
b. provide for output voltage control
c. limit the shunt current
d. dissipate the counter EMF
3. The device...
A motor apply power 10-hp split-phase motor speed at 1700 rpm is
used to drive a rotary pump, which operates 24 hours per day. An
engineer has specified a 7-in small sheave, an 10-in large sheave,
and three C112 belts. The service factor of 1.2 was augmented by
0.1 because of the continuous-duty requirement. Analyze the drive
and estimate the belt life in passes and hours.
A4-pole,250V, 50Hz single phase induction motor has rotor
frequency 2 Hz, in starting has following parameters: main winding
Rm=2 Ω ,Xm=4 Ω and staring winding : Rs =4 Ω , XLS=2 Ω ,Xcs=8 Ω.
Find : speed of motor, Im , IS, θm θs, α and p.f.
The test results for the approximate equivalent
circuit of a three-phase induction motor are shown below.
No-load test: equivalent applied voltage 120 V, input current 5 A,
equivalent input 480 W
Restraint test: Applicable voltage 20V, input current 40A,
equivalent input 480W
Determine the equivalent circuit constants of Rc, Xm,
Rs + Rr, and Xs + Xr
when friction and wind losses are ignored.
Answer - 30Ω, 40Ω, 0.3Ω, 0.4Ω
A 400V, three phase, 50Hz, 4 pole induction motor is operating
at a per unit slip of 40KW from the suppply. Under these conditions
stator losses amount to 2.2 KW and rotational losses due to
friction and windage amount to 1.4KW. Calculate the net horsepower
and torque developed.
The terminal voltage across a single phase of a stepper motor
used as a generator is applied across a load resistor of 33 ohms.
This terminal voltage has an amplitude of 18.7V and a frequency of
242 Hz. From a previous measurement, we know that this stepper
motor phase has an internal resistance of 11.2 ohms. What is the
time-averaged power delivered to the load? What is the electrical
efficiency of this circuit? Write down an expression for the
instantaneous...