A 2-pole d.c shunt motor operating from a 200 V supply takes a full-load current of 35 A, the no- load current being 2 A. The field resistance is 500 ohms and the armature has a resistance of 0.6 ohm. Calculate the efficiency of the motor on full-load. Take the brush drop as being equal to 1.5 V per brush arm.

Q: A shunt motor on a 240- V line has an armature current of 75 A. If the field- circuit resistance is…

A:

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- A d.c. series motor draws 22 A from a 240 V line while running at 840 rpm. It has an armature…

A:

Q: Consider a separately-excited DC motor with an armature resistance RA =0.25 ohm and terminal voltage…

A:

Q: Find the starting current (in Ampere) of 146 V DC series motor if the armature resistance = 0.6 ohm…

A: armature current of DC series motor=(terminal voltage -back emf)armature resistance+ series field…

Q: A Series motor drives a load at 1700 rpm and takes a current of 25 A when the supply voltage is…

A: According to the question we need to solve only the first question. Given, speed = 1700 rpm  the…

Q: 1200rpm, series DC motor has armature resistance of 50 and field resistance of 80. Find the…

A: From given efficiency we will calculate current drawn by the motor. input power= terminal voltage*…

Q: A DC shunt motor produces an output power of 4.8 kW on the shaft with a speed of 1120 rpm and a…

A: “Since you have asked multiple question, we will solve the first question for you. If you want any…

Q: A shunt motor on a 240- V line has an armature current of 75 A. If the field- circuit resistance is…

A: Introduction A shunt motor is a type of direct current (DC) motor that has a field winding in…

Q: A 400-V shunt motor has armature resistance of 0.9 ohms and field resistance of 200 ohms. Determine…

A:

Q: Q/ A 480 V, 988 r.p.m. d.c. shunt motor its full-load efficiency of 88 percent. The armature circuit…

A: Given V=480 VN=988 rpmη=0.88IL=72 AIf=1.66VD=1.8 VRa=0.19 Ω (i)The armature current is,…

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: 1. A 440 volts d.c. shunt motor has an armature resistance of 0.5 Q and field resistance of 180 2.…

A: Disclaimer:  Since you have asked multiple questions, we will solve the first question for you. If…

Q: A d.c. series motor connected to a 235 V supply takes 43 A at 950 r.p.m. The armature resistance is…

A: Given: DC series motor To find:

Q: . series motor when loaded to 50 A runs at 1500 r.p.m. on a 220 V supply. The motor resistance is…

A:

Q: A long shunt compound motor takes a current of 24 A at 400 V supply. The armatur series field and…

A: In this question we will find long shunt compound  motor overall efficiency....

Q: Find the number of resistance sections and the resistance of each section of a starter for a 3.7 kW,…

A:

Q: Q9. A series motor having a series field resistance of 0.25 2 and an armature resistance of 0.15Q is…

A:

Q: A 240 V, DC series motor takes 44 A, the armature and field resistances are 0.8 Q and 0.05 2…

A: Back emf =terminal voltage-drop in armature+drop in series field winding.

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 48kW, 600V, 1500 rpm separately excited de motor is controlled by single phase semi-controlled…

A: Armature resistance (Ra) = 1 Ω         Field resistance (Rf) = 145 Ω        Firing angle of…

Q: Ashunt-wound DC motor with the feld coils and rotor connected in parallel (Figure 1) operates from a…

A: From the DC shunt motor equivalent circuit

Q: The armature resistance of a DC motor is 0.4 £2, the supply voltage is 200 V and the back e.m.f. is…

A: Given, A DC motor with, Armature resistance, Ra=0.4 Ω. Supply voltage, Vs=200 V. Back emf, Eb=198 V.…

Q: 500 V shunt motor has an armature resistance of 0.3 Q and field resistance Of 250 Q. Determine the…

A:

Q: A direct current shunt motor develops 10 HP at 8000 RPM when drawing a line current of 40 A at 220…

A: Given- 10HP @ 8000 RPM.I=40 A,V=220 V, To Find- Efficiency & useful torque.

Q: A shunt motor on a 240- V line has an armature current of 75 A. If the field- circuit resistance is…

A: Given data, Terminal voltage V = 240 V. Armature current Ia=75 A. Field circuit resistance Rsh=100…

Q: The power input to a 500 V, 50 Hz. 6-pole. 3-phase induction motor running at 975 RPM is 40 kW. The…

A:

Q: The back e.m.f. in a d.c. motor . . the applied voltage and when it is equal to applied voltage the…

A: Concept: The voltage between two points is a short name of the electrical force that would drive on…

Q: he current drawn by the a 230 V DC motor of armature resistance 0.5 Ω and back emf 200 V is ?

A: Given: Terminal voltage, V = 230 V. Armature resistance, Ra=0.5 Ω. Back emf, Eb=200 V.

Q: Q/ A 42 kW, 480 V, 988 r.p.m. d.c. shunt motor its full-load efficiency of 88 percent. The armature…

A: Need to find input power torque developed and current drawn by.motor

Q: A 220 V shunt motor has an armature resistance of 0.4 ohm and field resistance of 140 ohm. The motor…

A: We have an shunt motor which is having, Voltage (V) = 220 V Armature resistance (Ra) = 0.4 Ω Field…

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

A:

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

A:

Q: A 220 V shunt motor takes a current of 20A. Resistance of the shunt field is 200 ohm and of the…

A:

Q: A d.c. shunt motor after running for several hours on constant voltage mains at 400 V takes a field…

A:

Q: A 230 V shunt motor takes a total current of 25 A. If the field winding resistance is 100 Q and the…

A: Given: A shunt motor having, V=230 VI=25 ARsh=100 ΩRa=0.3 Ω

Q: A series DC motor has a series-field winding of 25 turns per pole. Its armature resistance is 0.15…

A:

Q: series motor is

A:

Q: (480 V DC shunt motor has a starting current I 126 A from the source. Total resistance value of…

A:

Synchronous Motor

The synchronous motor is an AC electric type motor where at a steady-state the shaft rotation is synchronized with the supply current variable-frequency. To an integral number of AC cycles, the rotation period is exactly equal. The stator of the motor in the synchronous motor contains multi-phase AC electromagnets due to which a magnetic field is created that rotates in time with the oscillation of the line current. The rotor contains a permanent magnet and the rotor rotates in synchronization with the stator field at the same rate and provides the second synchronized magnetic field which is rotating in nature as a result. When the synchronous motor is supplied with independently excited multi-phase AC electromagnets on both the rotor and the stator, it is termed as a doubly-fed machine. The most widely used AC-type motors are the synchronous AC motor and the induction AC motors.