spinning industry, a 205 V, 6 pole shunt motor runs at a speed of 1250 rpm gives an output of 7 HP with an armature current of 38 A. The armature winding is wave connected and it has 690 conductors. Its armature resistance is 0.3 and drop at each brush is 1 V. Find (i) Useful torque, (ii) Total torque, (iii) Useful flux per pole and (iv) Rotational losses occurring in the motor. [

Q: An eight-pole, 24 KW, 124 V, DC machine has a duplex LAP-wound armature which has 72 coils with 6…

A: No. Of poles, P = 8 No. Of parallel paths, A = 2*8 Conductors, Z = 72*6*2 Voltage, E = 124V Speed, N…

Q: Describe the similarities in the construction of a DC motor and a DC generator.

A: From a mechanical standpoint, a DC motor and a DC generator are quite similar, but from a technical…

Q: A dc generator has a field flux of 0.001 Wb and 4 poles. The machine operates with at shaft speed of…

A:

Q: An eight-pole, 24 KW, 100 V, DC machine has a duplex LAP-wound armature which has 64 coils with 10…

A:

Q: 16 A 4-pole dc series motor has wave connected winding with 600 conductors. When fed from 250 V dc…

A: In this question We need to determine the torque developed of the motor We know Torque = power/w…

Q: A 230 V dc series motor has an armature resistance of 0.2 ohm and field resistance of 0.1 ohm at…

A: Given, Supply voltage, V= 230 V Armature resistance, Ra= 0.2 ohm Field resistance, Rse= 0.1 ohm Line…

Q: Q 5. A wave-wound armature of a 6-pole generator has 51 slots. Each slot contains 20 conductors. The…

A: The solution can be achieved as follows.

Q: A DO shunt generator delivers 45 A at a terminal voltage of 220 V. The armature and the shunt field…

A: Given values are - IL=45AVt=220VRa=0.01ohmRsh=44ohmStray losses=375W

Q: Q2) In DC machine, the speed is 800 RPM, the flux per pole is 2 m wb, and it has a Lap winding…

A: Given: In a DC machine Speed, The flux per pole, It has Lap winding (means the number of parallel…

Q: Under load in DC machines, the armature current will cause: a. Compensating Windings O b. Increase…

A: The given problem is from DC Machine.  The detailed explanation is given in the next step

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

A:

Q: An eight-pole, 24 KW, 124 V, DC machine has a duplex LAP-wound armature which has 72 coils with 16…

A:

Q: A 220 V DC series motor runs drawing a current of 30 A from the supply. Armature and field circuit…

A: It is given that:

Q: A shunt generator has an induced voltage on open circuit of 127 V. When the machine is on load the…

A: Given: A shunt generator having Induced voltage on open circuit, E=127 V Terminal voltage when…

Q: A dc generator has a prime mover that provides a speed of 1772 rpm at a torque of 24.4 N-m. With…

A:

Q: (7) The only parts suffers from eddy currents in AC motors: a- The stator. b- The rotor. c- The…

A: 7. Answer: The stator and rotor   Explanation: The rotating magnetic field and induced voltage cause…

Q: A 250 V series motor has an armature resistance of 0.2 ohm and a series-field resistance of 0.18…

A:

Q: 1. The operation of Commutator in DC Motor is O a) to convert dc to ac O b) to convert ac to dc O c)…

A:

Q: armature winding of a 200-V, 4-pole, series motor is lap-connected. There are 280 slots and each…

A: We need to find out speed for given motor

Q: A d.c. series motor is running whith a speed of 800 r.p.m. while taking a current of 20 A from the…

A:

Q: A short shunt compound dc generator delivers 100 A to a load at 250 V. The generator has shunt…

A: Given values, for short shunt compound dc generator Load current, IL= 100 A Supply voltage, V= 250 V…

Q: A 900 rpm, 4 pole wave wound shunt motor takes 300 A. The flux per pole is 0.02 Wb and the armature…

A: A 900 rpm, 4 pole wave wound shunt motor takes 300 A. The flux per pole is 0.02 Wb and the armature…

Q: A 900 rpm, 4 pole wave wound shunt motor takes 300 A. The flux per pole is 0.02 Wb and the armature…

A: back emf = Flux×speed×armature conductors60×No. of polesNo. of parallel paths. power developed in…

Q: 18. A 4-pole lap-wound armature has 144 slots with two coil sides per slot, each coil having two…

A: In this question,  We need to choose the correct option determine the induced voltage?  We know…

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

A:

Q: A 4-pole dc motor has a wave wound armature with 800 conductors. The useful flux per  pole is 20mWb.…

A: In this question,  A 4-pole dc motor wave wound armature so Number of parallel path A= 2 Z=800…

Q: A 900 rpm, 4 pole lap wound shunt motor takes 300 A. The flux per pole is 0.02 Wb and the armature…

A: A 900 rpm, 4 pole lap wound shunt motor takes 300 A. The flux per pole is 0.02 Wb and the armature…

Q: A dc shunt generator delivers 50 kw at 250 v, its armature has a 4-pole wave winding with a…

A:

Q: An eight-pole, 24 KW, 124 V, DC machine has a duplex LAP-wound armature which has 72 coils with 6…

A:

Q: An 8-pole dc generator has 500 armature conducters and a useful flux of 0.05 Wb. A. What will be the…

A: Given- 8-pole dc generator, Armature conductors Z=500, N=1200 RPM, flux ϕ=0.05 Wb, To Find- A. Emf…

Q: An eight-pole, 24 KW, 124 V, DC machine has a duplex LAP-wound armature which has 72 coils with 6…

A: Given An eight-pole, 24 KW, 124 V, DC machine has a duplex LAP-wound armature which has 72 coils…

Q: A six-pole de machine has an armature connected as a lap winding. The armature has 32 slots with six…

A: This question belongs to electrical machine . It is based on the concept of induced voltage in…

Q: A lap-winding DC machine has 24 coils, 18 turns per coil, and 4 poles. The average flux density per…

A:

Q: An 8-pole DC machine has a simplex wave-wound armature containing 200 coils of 10 turns each. The…

A: Since you have asked multiple questions in a single request, we will be answering only the first…

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.