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Can you please assist with explaining step by step the principles and fundamentals of the following question? i am not wanting the answer just how to work out the problem and understand the problem and acquire the skills to sokve the problem.
1) A four-pole, star-connected, squirrel-cage induction motor operates from a variable voltage 50 Hz three-phase supply. The following results were obtained as the supply voltage was gradually reduced with the motor running on no-load. Stator line voltage 220 164 112 88 42 Stator line current (amperes) 6.8 5.4 3.9 3.8 3.7 Stator power (watts) 470 360 278 244 232
a) By plotting a suitable graph from these results, determine the total of windage and friction losses, the no load magnetising current I0 (assume no load current I0 is magnetising losses) and the equivalent circuit magnetising circuit parameters R0 and X0.
b) With locked rotor and 50 volts applied to the stator, the current was 23 amperes and power input 985 watts. The resistance between two lines is 0.5 ohms. If the rotor turns per phase equals the stator turns per phase, draw the equivalent circuit of the motor and determine the values of the various components. Assume the stator phase reactance is the same value as the rotor phase reactance.
You have a large pin made from aluminum with a diameter of 0.01 m. This pin is needed to hold something from the ceiling. You install the pin into a hole of diameter 0.01 m in a piece of tungsten; assume a "perfect press fit". It was very hot, 323K, ..
a room has walls and a ceiling that conduct heat from the room to the cooler outdoors. if the inside temperature is
determine the minimum initial velocity at which the ball must be kicked in order for it to just cross over the 3m high
A 20 MW back-pressure steam turbine receives steam at stagnation pressure of 4 MPa and stagnation temperature of 300oC, exhausting from the last stage at stagnation pressure of 0.35 MPa. The turbine isentropic efficiency is 0.884, and mechanical loss..
An air conditioner maintains the temperature of a dwelling at 72 0F when it is 96 0F outside. If heat is transferred through the walls and ceiling at 35,000 BTU/hr. a) What is the minimum power required to run the air conditioner in hP and b) calcula..
an impeller provides 20 kj of work to the air contained in a 0.15 m3 rigid volume initially at 200kpa and 10degc.
a very wide sheet of 7075-t651 aluminum plate 8mm thick is found to have a single-edge through-the-thickness crack 25
A 0-45-90 rosette strain gage is placed on a material with E = 100GPa and v = 0.25. The material is then placed in a state of plane stress. Find Sigma x, Sigma y, Tau xy, Epsilon z, and largest principal stress
A heater exchanger uses 6 kg/s cold water at 10 C in a counter-flow heat exchanger to cool a hot glycerine (cp = 2.05 kJ/kg-K) stream that enters at 300 C at a rate of 10 kg/s. If the water exits the heat exchanger at 50 C. find the rate of heat tran..
a cantilever beam with round cross section is loaded at the tip with a transverse force of 1000 lb. the beam is also
air flows through an adiabatic internally reversible compressor at a rate of 0.04 kgs. at the inlet thepressure is 200
determine the maximum pressure across a 10 hp pump that has an inlet diameter of 1.0 inches and velocity of 10 fps. the
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