Question 2 A 120-V DC motor rated at 5-hp has a full load efficiency of 86% The field and armature resistances are 60 ohms and 0.75 ohm, respectively. What starter resistance will be required to limit the armature current at starting to 200% of its rated armature current?

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: A shunt motor has a nameplate rating of 140 hp, 500 V, 205 A, 1700 rpm. The shunt field circuit…

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Q: 1-D.C. shunt motor maintains a more constant speed under varying load. (True or False) 2-Dc shunt…

A: 1-D.C. shunt motor maintains a more constant speed under varying load.    2-Dc shunt motor is best…

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 d.c. shunt motor is rated 100 hp, 600 V, 1800 r.p.m., and is 88 % efficient when operating at…

A: Given data: Output power of the motor P0=100 hP Po=100 hP     =100×745.7      =74570 W Terminal…

Q: 14 • A 120-V, 2400-rpm shunt motor has an armature resistance of 0.4 2 and a shunt field resistance…

A: i hope its helpfull.thank you.

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: A 5 hp, 230 V DC motor has a nominal armature current of 25 A. If the armature resistance is 0.2 ,…

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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: determine "A" through "G" for the DC motor on worksheet 5 when it is running at capacity and its…

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

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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.