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

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

A:

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: 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: - 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: (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: 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 4-pole, 250-V, d.c. shunt motor has a lap-connected armature with 960 conductors. The flux per…

A: Given:

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

A:

Q: The flux o in a 16 KW, 100 V, Duplex Lap-Wound DC machine has been set to induce rated voltage at a…

A: Given Power,p = 16 KW, Voltage,V = 100 V, Duplex Lap-Wound DC machine has been set to induce rated…

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

A:

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

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.