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: Give the relevant details for drawing lap winding for a de machine with 4 poles, 22 slots and 6…

A: We need to give relevant details for drawing a lap winding for a dc machine having, Poles (P) = 4…

Q: 1.7)The armature of a 4-pole de machine rotates at 840 rpm .The armature length and diameter are 40…

A: The answer to the above problem is provided below. Hope it helps.

Q: has a resistance of 60 2, determine (i) Generated EMF, (ii) Total Resistance, (ii) Armature Current,…

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Q: 4-pole, wave-wound armature has 72 slots with two coil-sides per slot, each coil has four turns. If…

A:

Q: an overall efficiency of 83.5%.

A:

Q: DC series motor

A: For the DC series motor, Ise=Ia =Ia   Flux, conductor, poles, armature resistance values given in…

Q: 4) A dc. ahunt machine while running as generator develops a voltage of 240 V at 1000 rp.m. on…

A: In this question we will find speed and efficiency of motor with given data....

Q: Q2: If the rated frequency for an induction motor is 60 Hz and the maximum tonque Tm is 100 N.m,…

A:

Q: 1- A 8-pole a separately excited generator, having the wave-wound armature winding has 16 slots,…

A: As per guidelines we are supposed to answer only first question if multiple questions are posted by…

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)find the flux density in airgap. b)if the stator is excited with 50 Hz current, find the…

A: Given: A 2 pole synchronous machine in which lg=2.5mmAg=500cm2I=5AN=500μc=∞ According to question:…

Q: An 8 pole, lap connected armature has 500 conductors has the flux per pole is 20 mWb is driven at…

A: For lap connected armature, Number of parallel path ( A ) = number of pole

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

A:

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: A 250 V, 8-poles lap wound D.C. shunt motor has an armatre resistance of 0.5 N and shunt field…

A:

Q: A thicker wire is used in the DC series field winding than DC shunt field winding in DC machines. *…

A: current carrying capacity of wire is directly proportional to area of wire. i.e. thicker the wire ,…

Q: The armature of a 4-pole, separately excited dc generator is wave wound with 360 conductors. This…

A:

Q: An 8-pole lap-connected armature has 40 slots with 12 conductors per slot generating a voltage of…

A: The voltage supplied to the motor by an external power source is known as EMF or electromotive…

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

A: Above question is based on DC generator, the major classification of DC generator are: Series…

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 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: - Indicate whether the following statement are true or false

A: in the DC machine the emf can be calculated using the following equation E =  ∅ZPN / 60 A

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 four-pole, lap-would DC machine has 462 conductors in the armature. The average flux per pole is…

A:

Q: Q.36 Name three factors that determine the torque produced by an induction motor. Select one or…

A: Those  three factors are following in which torque depends upon:- i) the magnitude of rotor current.…

Q: The DC shunt generator with the terminal voltage 350 V, armature drop 7 V and the each brush drop 2…

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.