Engineering, 28.05.2020 01:06 aliami0306oyaj0n

A 460-V 60-Hz four-pole Y-connected induction motoris rated at 25 hp(note: this is the nominal output power at the nominal speed (or nominal slip).The equivalent circuit parameters areR1= 0.15 R2= 0.154 XM= 20 X1= 0.852 X2= 1.066 PF&W= 400 WPmisc= 150 WPcore= 400 WFor a slip of 0.02, find(Importantnote: this 2% slip mayor may notbe the nominal slip of the motoras it is not explicitly stated. Hence, the output power associated with this slip maybe different than the given nominal output power (i. e. 25 hp)).(a)The line current IL(b)The stator power factor (c)The rotor power factor (d)The rotor frequency (e)The stator copper losses SCLP(f)The air-gap power PAG(g)The power converted from electrical to mechanical form Pconv(h)The induced torque ind(i)The load torque load(j)The overall machine efficiency (k)The motor speed in revolutions per minute and radians per second(l)What is the starting line current of this motor?(Hint: starting slip is one, now redraw your circuit and solve it for the starting current)(m) What is the slip at the pullout torque? What is the pullout torque of this motor?

Answers: 1

Show answers

Another question on Engineering

Engineering, 04.07.2019 18:10

Air is to be cooled in the evaporator section of a refrigerator by passing it over a bank of 0.8-cm-outer-diameter and 0.4-m-long tubes inside which the refrigerant is evaporating at -20°c. air approaches the tube bank in the normal direction at 0°c and 1 atm with a mean velocity of 4 m/s. the tubes are arranged in-line with longitudinal and transverse pitches of sl- st 1.5 cm. there are 30 rows in the flow direction with 15 tubes in each row. determine (a) the refrigeration capacity of this system and (b) pressure drop across the tube bank. evaluate the air properties at an assumed mean temperature of -5°c and 1 atm. is this a good assumption?

Answers: 1

Answer

Engineering, 04.07.2019 18:10

Afull journal bearing has a journal diameter of 27 mm, with a unilateral tolerance of -0.028 mm. the bushing bore has a diameter of 27.028 mm and a unilateral tolerance of 0.04 mm. the l/d ratio is 0.5. the load is 1.3 kn and the journal runs at 1200 rev/min. if the average viscosity is 50 mpa-s, find the minimum film thickness, the power loss, and the side flow for the minimum clearance assembly.

Answers: 1

Answer

Engineering, 04.07.2019 18:20

Apiston-cylinder device contains 0.1 m3 of liquid water and 0.9 m3 of water vapor in equilibrium at 800 kpa. heat is transferred at constant pressure until the temperature of water reaches 350 °c. determine (a) the quality of water at the initial state (b) the work associated with this process, (c) the heat associated with this process.

Answers: 2

Answer

Engineering, 04.07.2019 19:10

What are the major differences between injection molding and extrusion?

Answers: 2

Answer

You know the right answer?

A 460-V 60-Hz four-pole Y-connected induction motoris rated at 25 hp(note: this is the nominal outpu...

Questions