A 200 V series DC motor with the magnetization curve as shown in Figure Q1(a) has a field winding of 25 turns per pole. Its armature resistance is 0.05 Q, and its field resistance is 0.05 Q. The armature current is set to 50 A. (i) Based on the given specification, sketch the equivalent circuit of the DC motor. (ii) Calculate the speed and induced torque of the DC motor. (iii) Calculate the output power and efficiency of the DC motor. Rotational speed = 1200 rpm 200- 175- 150 125- 100 75 50- 25 1000 2000 3000 4000 5000 6000 7000 Field magnetomotive (A.turns) Figure Q1(a): Magnetization curve Internmal generated voltage, EA (V)

Q: A long compound DC generator feeding a load of current 100 A, at a voltage of 230 V. Calculate the…

A: Given: Current, IL=100A, Resistance, Ra=0.04ΩRsh=115ΩRse=0.01Ω Voltage, V=230V

Q: A 500 V D.C. shunt motor having an armature resistance of 1 ohm draws an armature current of 120 A…

A:

Q: A 250 V shunt motor, having an armature resistance of 0.2 ohm draws from the mains a current of 50…

A: Given V=250 V armature resistance =Ra =0.2 Ω at half full load, armature current =Ia1 =50 A Initial…

Q: a dc shunt motor runs at 900 r.p.m from a 460 V supply when taking an armature current of 25 A.…

A: Take the ratio of back emfs to find the speed at terminal voltage of 230 volts. Back emf is directly…

Q: Consider a separately-excited DC motor with an armature resistance RA = 0.2 ohm and terminal voltage…

A: Given: Rated speed, N1=1200 rpmRA=0.2 ΩVT=130 VVF=360V

Q: A DC motor has stall torque of 2 N-m (Newton*meters) and a no-load speed of 2000 RPM. With a load of…

A: Given thatN1=2000 rpmτ1=2 N.mτ2=0.5 N.m Part (a)  Assume that given motor is series motor . For…

Q: Assume that a separately excited shunt de machine has a rated terminal voltage of 230 V and a rated…

A: We got an a separately excited shunt dc machine with, Terminal Voltage (Vt) = 230 V Armature current…

Q: A 220 V separately excited dc motor takes 20 A and the armature resistance is 1.0 0. If the armature…

A: We need to find out the speed for given motor.

Q: A 230V DC series motor operates at its full load current and speed of 22A and 750 revolutions per…

A: Types of DC Motor Seperetely excited motor Series Motor Shunt Motor Compound Motor Differential…

Q: A 500 V, lap wound d.c. A shunt motor has 90 slots and each has 8 conductors. When the motor…

A:

Q: A long compound DC generator feeding a load of current 100 A, at a voltage of 230 V. Calculate the…

A:

Q: A 100 V DC separately excited motor has armature resistance 2 ohms and voltage constant of 0.6 V…

A: V = 100 V Ra = 2 ohm Kb= 0.6 V/rad/s T= 20 Nm Kt = 50 Nm/s

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.