A DC shunt motor produces an output power of 4.8 kW on the shaft with a speed of 1120 rpm and a terminal voltage of 240 V. The motor has an armature resistance of 0.5 Ohms and a field resistance of 240 Ohms. If the motor at this load has an efficiency of 85%, determine: a. Explain the process of controlling the speed of a DC

Q: A 220 V dc shunt motor draws a current of 50 A from the supply and runs at 900 rpm. Its armature and…

A:

Q: A 220 V, 15 kW, 850 r.p.m. shunt motor draws 72.2 A when operating at rated condition. The…

A: I have written this solution as handwritten solution. Hope you find the perfect solution.

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 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: 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 250V series motor runs at 500 rpm at rated load current of 75 A. The armature circuit has a…

A: It is given that: V=250 VN1=500 rpmIL1=Ia1=75 ARa+Rse=0.2 Ωϕ α Ia

Q: An eight-pole 60-Hz ac induction motor produces an output power of 2 hp and has rotational losses of…

A: Given data, The value of frequency of motor is f = 60 Hz. Number of poles P = 8. The value of…

Q: Consider a shunt DC motor with an armature resistance RA=0.2 ohm and terminal voltage VT = 160 V.…

A: Given Data: VT = 160 V Ra = 0.2 ohm Ia = 60 A N = 1517 rpm Ploss = 848 Watt

Q: Sketch the torque versus speed characteristic for a series-connected dc motor.

A: The circuit diagram of the DC series motor can be drawn as  Thus for constant power motor : Ns α 1Γ…

Q: With the aid of a diagram as shown, explain how does AC generator work and describe the operating…

A: AC generator working: As per Faraday's law of electromagnetic induction, an EMF is induced in the…

Q: A 1200 rpm, 700V Series DC motor has an armature resistance of 20 and the field resistance of 90. If…

A: Efficiency = output power/ input power. Total losses = cupper loss + rotational losses.

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

Q: A permanent magnet DC mitor has an armature resistance 1.4 52. When it is supplied by 75-V DC…

A:

Q: shunt-wound DC motor with the field coils and rotor connected in parallel (Figure 1) operates rom a…

A: Given Data:Supply voltage Vdc = 130 VField winding resistance Rf= 208 ΩArmature winding resistance…

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.