Calculate the torque in newton-meter developed by a 440-V dc motor having an armature resistance of 0.25 ohm and running at 750 rpm when taking a current of 60 A.

Q: Running at 1200 rpm from a 280-V source, a series-connected dc motor draws an armature current of 25…

A:

Q: 90%. Select one: a. Not on the list b. 100 N-m c. 120 N-m d. 178 N-m

A: Given data: Output Power= 25hp (18.65kW) Speed, N= 1000 r/min

Q: An induction motor has a full load slip of 0.04. It's starting current 5 times its full load…

A:

Q: A series motor runs at 700 rev/min when the voltage is 300 V and the current is 20 A. The armature…

A: Initial speed of motor N1=700 rpm. Initial terminal voltage V1=300 V. Armature current Ia=20 A.…

Q: A dc motor has an electrical power of 150W, speed of w=30rad/s, and a torque of 3N-m. The efficiency…

A: given Input power= 150W w=30 rad/sec torque,τ=3 N-m

Q: A 230-volt series motor has an armature resistance of 0.32 ohm and a series-field resistance of 0.16…

A: Given: V=230 VRa=0.32 ΩN=500 rpmIa=32 A

Q: Calculate the losses in the machine and its efficiency if the power input is 18,000 watts, under…

A: To find the losses in the machine and it's efficiency Given : power input = 18000 watts  And output…

Q: 5. A 20KW dc shunt generator delivering rated output at 1000rpm has a terminal voltage of 500 V. The…

A:

Q: 2. Assume negligible inductance for the motor model shown in Figure 1. This motor is connected to a…

A:

Q: The rotor of an induction motor has a moment of inertia of 5kgm2. What is the torque required to…

A: Given data,  Inertia is given as, I=5 kgm2 Final speed Nf=1800 rpm Initial speed Ni=1600 rpm Time t…

Q: A universal motor has armature circuit resistance of 15 ohm and inductance of 0.3H. On being…

A:

Q: A 220V, four pole, wave wound DC series motor has 1000 conductors on its armature. It has armature…

A: DC machines (Generator/ Motor) are the important parts of electrical drives. These machines are used…

Q: Calculate the torque in newton-metre developed by a 440 V dc motor having an amature resistance of…

A: GivenTerminal voltage V=440 vArmature resistance ra=0.25 ΩSpeed N=750 rpmArmature current Ia=60 A

Q: A 200 V dc motor takes 50 A in series and is operating at a speed of 1000 rpm when full of…

A: Given, A dc motor with, Terminal voltage, V=200 V. Armature current, Ia=50 A. Operating speed,…

Q: A 240 V dc series motor takes 40 A when giving its rated output at 1500 rpm. Its resistance is 0.3…

A:

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: In a d.c. series motor, the torque developed is 20 Nm at 10 A. If the load current is doubled, the…

A: Given a dc series motor with, Torque developed, τ1=20 Nm. At the current, I1=10 A. When the 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: 1. When running at its operating speed, a 210-V dc motor with an armature whose resistance is 2.00 N…

A: Given:  A series DC motor whose terminal voltage    VT = 210 volts  Armature resistance, Ra = 2 ohm…

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

A:

Q: A 6-pole. 50-Hz 3-ϕ induction motor is running at 950 rpm and has rotor loss of 5 kW. Its rotor…

A: Thank you Reference,Concept and some relevant examples:

Q: A DC series motor of resistance 1 ohm across terminals runs at 1000 rpm at 250 V taking a current of…

A: Given, a DC series motor having Resistance across terminal, Rt = 1 ohm Speed, N1 = 1000 rpm Terminal…

Q: The overall efficiency of a 4-pole DC  motor is 83.5% when running at a speed of 550 rpm. The motor…

A:

Q: dc shunt motor

A: Given- DC shunt motor- Current, IL = 30 A Voltage, Vt = 230 V Efficiency= 80 %  Field resistance…

Q: 4. The field windings of a series motor has a resistance of 120 ohms at 15°C. After running for two…

A:

Q: The dc motor has maximum current at start because: O The back emf is maximum. OThe back emf is zero.

A: here we have to find why the dc motor has maximum current at the start.

Q: The current drawn by 220 V dc shunt motor of armature resistance 0.5 ohm and back emf 200 V is

A: Given, A DC shunt motor having Supply voltage, V=220 V Armature resistance, Ra=0.5 Ω Back emf,…

Q: series motor is

A:

Q: 459. The current drawn by a 460 V dc motor of armature resistance 0.5 ohm and back emf 420 V in

A: Given a dc motor with, Input voltage, V = 460 V. Armature resistance, Ra = 0.5 ohm. Back emf, Eb =…

Q: A 240 V DC shunt motor takes 20 A and delivers 28 N.m at 1350 r.p.m, the efficiency is . O 73.63% O…

A: Given: A DC shunt motor having following specifications Rated voltage, V=240 V Current, I=20 A…

Q: Iron loss of DC motor is constant with the load. Select one: O True O False

A: Iron loss depends on voltage.  As voltage is constant iron loss is constant.

Q: ) Describe a single wire DC motor with the help of a diagram.

A:

Q: A 250 V, 4-pole, wave-wound d.c. series motor has 782 conductors on its armature. It has armature…

A:

Q: 4. Compute the efficiency of 100 kW, 250-V, 6-pole, 1000 rpm long shunt compound generator. The…

A: Rating of the generator 100 kWTerminal voltage Number of poles Speed Long shunt compound generator…

Q: The output power of a shunt motor is 7.8 hp. Its armature draws 50 A from 120 V. The armature and…

A: Given: Pout=7.8 HPIL=50AVt=120VRa=0.1ΩRf=100Ω Shaft power will be: Pout=7.8×746Pout=5818.8 W

Q: A D.C. series motor of resistance 1 ohm between terminals runs at 800 r.p.m. at 200 V with a current…

A: In the case of the DC series motor Ea=V - Ia(Ra+Rse) where V=Terminal Voltage=200 V; Ea=Armature…

Q: A DC motor with a shunt field winding has the following characteristics: Vr = 96.0 V R, = 1.50 2 K=…

A: Given: A DC motor with shunt field winding have VT=96 VRA=1.50 ΩK=0.352 mT=18 Nm

Three Phase Induction Motor

The induction motor is an electric motor that runs on AC (alternating current) and it is of two type single phase motor that work on single-phase power supply and three-phase motor that work on three-phase power supply.