a 220-v dc motor is running at a full load speed of 800 rpm and draws 100 A. calculate at what speed the motor will run when developing half torque. the total resistance of the armature and field is 0.1 ohm

Q: shunt dc motor has armature voltage = 150 V, armature field resistance 100 2, nd armature resistance…

A:

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 24 KW, 140 V, Duplex Lap-Wound DC machine has been set to induce rated voltage at a constant K…

A:

Q: OV DC series motor takes the line current of 30 A and runs at 750 rg d if torque is increased to 50…

A:

Q: Explain the types of DC generators

A: In the question, Explain the types of DC generators.

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

A:

Q: 1. When running at its operating speed, a 215-V dc motor with an armature whose resistance is 1.70 2…

A: Given data,VT  = 215 VoltsRa = 1.70 OhmsIL  = Ia = 22.0 AWe know that for a dc motor, V = Eb +…

Q: A 220 V permanent magnets DC motor has an armature resistance of 0.502. If the full load armature…

A: Given data, Terminal voltage V = 220 V. Armature resistance Ra=0.5 Ω. Armature current Ia=20 A.

Q: (c) A shunt generator delivers 50 kW at 200 V and 450 rpm. The armature resistance is 0.02 ohm and…

A: Use equivalent dc machine model to solve all the parameters Even though the machine operation…

Q: series motor runs at (800 r.p.m) when the voltage is (400 V A). The armature resistance is (0.4 Q)…

A:

Q: A 500 V shunt motor running at 720 rpm takes an armature current of 50 A. The equivalent armature…

A: Terminal voltage V = 500 V Initial speed of motor N1=720 rpm Speed after adding resistance, N2=540…

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: 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: A 220V. dc series motor is running at a speed of 800 rpm and draws 100 A. Calculate at what speed…

A: It is given that: Vt=220 VN==800 rpmIa=100 ARa+Rse=0.1Ω

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: d.c. shunt motor

A:

Q: The electromagnetic torque developed in a DC machine is 80 Nm for an armature current of 30 A. What…

A: Solution: Given:  The electromagnetic torque developed in a DC machine is 80 Nm for an armature…

Q: A DC motor has the following specifications: 10 hp, 37.5 A, 230 V; flux / pole = 0.01 Wb, number of…

A: back  emf Eb = flux per pole×speed of the machine×total number of conductors60×number of polesnumber…

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

A:

Q: discuss how the dc motor is used in electric toothbrush

A: Electric toothbrush: It is a toothbrush that uses rapid automated bristle movements, such as…

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: 1.9 A series motor has an armature resistance of 0.2 ohm and a series field resistance of 0.3 ohm.…

A:

Q: Q7/ What are the advantages and disadvantages of the permanent magnets dc motors?

A: Permanent magnet DC motors produce a flus that is constant unlike an electromagnetic excited DC…

Q: de motors

A:

Q: The torque developed by a dc motor is 30 Nm when the armature current is 25 A. If the flux is…

A: Initial torque T1=30 Nm. Initial armature current Ia1=25 A. Let initial flux is ϕ1. Flux is reduced…

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: At rated load, a shunt motor draws an armature current of 100 A from a 240 V source while running at…

A: Given: At rated load, Ia1 =100 A, N1=1000 rpm, E1=228 V.At no load, Ia2=5A, E2=235 V, N2=?

Q: dc shunt motor

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

Q: Justify why an electrostatic motor cannot be operated from dc supply. Derive the expression of…

A:

Q: series motor is

A:

Q: A DC motor takes an armature current of 130 A at 460 V. The armature circuit resistance is 0.4 Q.…

A: Given that: Armature current, Ia=130 A Voltage, V= 460 volt Armature resistance, Ra=0.4 ohm Pole,…

Q: A dc series motor has an armature resistance of 0.06 Q and series field resistance of 0.08 Q. The…

A:

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.