Engineering, 07.04.2020 17:22 idklol81

Three phase, 12 pole induction motor is excited by 60 Hz three phase source. At rated load and speed, the induction motor runs at 860 rpm and absorb 90kW power from the three phase AC input. The kinetic energy of all revolving parts is 100kJ at rated load and speed. 1. Calculate the slip of the motor at rated speed. 2. If the voltage induced at rotor bar is 10V when the rotor is locked, what is the voltage induced at rotor bar when the motor is at rated speed? 3. What is the I^2R loss at rated load and speed? 4. Plugging is applied to stop the induction motor and then reverse the rotation to 860 rpm, how much power dissipated in the rotor circuit during this process?

Answers: 3

Show answers

Another question on Engineering

Engineering, 04.07.2019 12:10

On a average work day more than work place firs are reorted

Answers: 1

Answer

Engineering, 04.07.2019 18:10

The mass flow rate of the fluid remains constant in all steady flow process. a)- true b)- false

Answers: 1

Answer

Engineering, 04.07.2019 18:20

Along 8-cm diameter steam pipe whose external surface temperature is 900c connects two buildings. the pipe is exposed to ambient air at 70c with a wind speed of 50 km/hr blowing across the pipe. determine the heat loss from the pipe per unit length. (b) air at 500c enters a section of a rectangular duct (15 cm x 20 cm) at an average velocity of 7 m/s. if the walls of the duct are maintained at 100c. a) the length of the tube for an exit temperature of the air to be 40 0c. b)the rate of heat transfer from the air. c) the fan power needed to overcome the pressure drop in this section of the duct.

Answers: 1

Answer

Engineering, 04.07.2019 19:10

Air inially occupying a volume of 1 m2 at 100 kpa, 27 c undergoes three internally reversible processes in series. process 1-2 compression to 500 kpa during which pv constant process 2-3 adiabatic expanslon to 100 kpa process 3-1: constant-pressure expansion to 100 kpa (a) calculate the change of entropy for each of the three processes. (b) calculate the heat and work involved in each process. (c) is this cycle a power cycle or refrigeration cycle?

Answers: 3

Answer

You know the right answer?

Three phase, 12 pole induction motor is excited by 60 Hz three phase source. At rated load and speed...

Questions