A.) A 120V shunt motor takes 75A at full load. Armature resistance of 0.2Ω and brush contact drop of 2V. Find the starting resistance to limit the current of 150% of rated load, when the counter emf is 25% of the armature voltage Va. 0.582Ω 0.782Ω 0.802Ω 0.85Ω B.) A 4 pole, 12 slot lap wound armature has two coil side per slot. Assuming single turn coils and progressive winding, what is the back pitch? 3 5 6 7

Q: A 208-V, 10hp, four pole, 50 Hz, Y-connected induction motor has a full-load slip of 5 percent i.…

A: Given data, V = 208 V. P = 4. f = 50 Hz. s = 0.05. hp = 10 hp. (i) The expression for synchronous…

Q: Question 5 A 200 HP, 440 V, 1440 rpm, 50 Hz induction motor has a power factor of 0.85 lagging and…

A: Starters : Starters are used to limit the starting inrush current DOL Starter or direct online…

Q: 440V DC shunt motor takes a current of 40A from the supply. The shunt motor field winding resistance…

A: Back emf = terminal voltage + drop in armature resistance.  Power developed = back emf × armature…

Q: a) A 120 V shunt motor takes 2 A at no load and 7 A when running at full load at 1200 rpm. The…

A: Step 1:Step 2:Step 3:Step 4:

Q: A 120-V shunt DC motor has armature resistance R,=0.2N and and field resistance Rp=602 . The rated…

A: Given DataL V = 120 V Ra = 0.2 ohm Rf = 60 ohm rated full load current = 42 A

Q: A DC compound motor has shunt field resistance of 5002 and series field resistance of 22. Shunt…

A: Shunt field resistance of the motor (Rsh) = 500 Ω Series field resistance (Rse) = 2 Ω Shunt field…

Q: A 8-kW, 4-pole, 220-V, 50-Hz reluctance motor has a torque angle of 30° when operating under rated…

A: Given data: f=50 Hz (i)The expression for the synchronous speed is given as, Ns=120fP=120×504=1500…

Q: 1. A 20 H.P., three-phase, 6-pole, 50 Hz, 400 V induction motor runs at 960 rpm on full load. If it…

A: Dear student as per our guidelines we are supposed to solve only one question.kindly repost other…

Q: A 230 volts motor has an armature circuit resistance of 0.6 ohm. If the full load armature current…

A: We have an motor with, rated Voltage for motor (V) = 230 V Armature Resistance (Ra) = 0.6 Ω Full…

Q: 2. A 120 V shunt motor has armature resistance of 0.1 ohm and field winding resistance of 60 Ohm.…

A: The solution can be achieved as follows.

Q: 550V dc series motor with an armature resistance of 0.35 W and and field resistance of 0.15 W drives…

A: In this question we will find Load torque.... And speed and power output..

Q: • A 120-V, 2400-rpm shunt motor has an armature resistance of 0.4 2 and a shunt field resistance of…

A: # Given Data:- Voltage V=120V - Rated speed N=2400rpm- Armature resistance Ra​=0.4Ω - Shunt field…

Q: A 230 Vd c. shunt motor has an armature resistance of 0.5 and field resistance of 115 2. At no load,…

A: Given:The given voltage is 230 VThe resistance is 115 ohmThe speed is 1200 rpmThe current is 2.5…

Q: The input current to a 220 V, short-shunt compound motor at no-load is 6 A. The shunt field…

A: Fig: circuit diagram of short-shunt compound motor

Q: A 250 V, 37 KW, dc shunt motor has to expert a maximum torque of 150% of full load torque during the…

A:

Q: 8.A. One characteristic of a typical universal motor is that it A. is usually designed for low-speed…

A: Universal motor is a special motor designed to operate on AC as well as DC supply.   Centrifugal…

Q: A 200 V dc shunt motor takes 20 A at rated voltage and runs at 1000 rpm. Its armature resistance is…

A:

DC Series Motors

A DC motor is a type of electric motor which converts electric energy into mechanical energy. The forces that are produced by the magnetic field are what those common types of motors rely upon. Either electro-mechanical or electronic, all types of DC motors have some internal mechanism to change the current direction in part of the DC motors. As the DC motors could be powered from existing DC lighting power distribution systems, these motors were the first form of motors widely used. By changing the strength of the current in its field winding or by using a variable supply voltage, the speed of the DC motors can be controlled over a wide range.