8) A 230 V fed single quadrant chopper has a 40% duty cycle. A separately excited DC motor is controlled by a chopper. Motor has a back emf constant of 0.5 V/rad/s and 2 armature resistance. Determine the torque of motor at speed of 1400 rpm 4.7 N-m 15.44 N-m 10.5 N-m 19 N-m

Q: Frequency of emf in the stator of a 8 pole induction motor is 50Hz and the rotor emf frequency is…

A:

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: The 3-phase wound-rotor induction motor has .... . a) high starting torque b) low starting current…

A: In this question , we will write induction motor starting related questions..

Q: Provide your recommendations for reduction of magnetic losses in an induction motor.

A: The energy expended when an alternative magnetic field works on a Ferro-or ferrimagnetic material,…

Q: discuss how the dc motor is used in washing machine

A: The answer as given below:

Q: Design a LabVIEW program that sweep Servo motor from 0 degrees to the specified angle and repeat…

A: The given image is very blurred.Kindly upload it again.It is not possible to read it. My mother is…

Q: Find the torque developed in an induction machine rotating at 1450rpm if the power developed is 4kw.…

A:

Q: The induced torque in dc motors beyond the pole edges is Select one: O a. infinity Ob. 180 V OC. 220…

A: The diagram of the dc motor loop segment connected to the external source is shown below:  The…

Q: An induction motor has 4 pole 50 Hz frequency find synchronous speed (rpm). If motor speed is…

A: Given values are - P=4f=50HzNr=1400rpm

Q: Determine the total electromotive force

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 3-phase induction motor runs at almost 3000 rpm at no load and 2960 rpm at full load when supplied…

A: Given Data;  Ns = 3000 rpm N = 2960 rpm

Q: Draw the block diagram of de

A:

Q: A freewheeling DC motor is driven with 1000 rpm and a nominal load torque of 80Nm. The field circuit…

A: According to question: Average voltage to field winding is…

Q: 5. A 6-pole induction machine works at a frequency of 60 Hz. a. What is its synchronous speed? b. If…

A:

Q: In dc machines, armature windings are placed on the rotor because of the necessity for…

A:

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

A:

Q: A dc shunt generator has a critical field resistance of 400 at 1200 rpm. Now if the speed of the…

A:

Q: the relation between armature and field currents in a series connected DC motor is O It = If + la O…

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: 6. The O.C.C. of a shunt generator when separately-excited and running at 1000 r.p.m. is given by :…

A: 6. The Open circuit characteristics of a shunt generator when separately-excited and running at 1000…

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

A:

Q: Consider figure and assume that the rotational torque is 200 N-m and the radius of the rotor is 0.25…

A: Given data, Rotational torque = 200 N-m radius of rotor (r) = 0.25 m   We have been asked to find…

Q: If the number of slots per pole in a synchronous machine is 9 and each coil spans 6 slot pitches,…

A: For this problem we can easily find pitch factor by finding slot angle .

Q: In an Induction motor, if the load is decreased, what happens to the power factor?Select one:a.…

A: When the load on an induction motor decreases, the motor draws less real power but still requires a…

Q: The supply frequency to the stator of an 8-pole induction motor is 50 Hz, and the rotor frequency is…

A: Number of poles p = 8 Frequency of stator fs = 50 Hz Frequency of rotor fr = 3 Hz We have to…

Q: Draw Block diagram and transfer function of DC series motors

A: A DC series motor venture is to show the electrical electricity into mechanical one primarily based…

Q: Explain in detail the Starting of Induction Motors

A:

Q: A four – pole dc generator armature is lap wound with 60coils. Each coil has 8 turns. Determine the…

A:

Q: A 20 kw 400 v long shunt compound generator has an armature, shunt feald and series field…

A: Output power=20Kwoutput voltage=400 varmature resistance=0.1Ωshunt field resistance=80Ωseries field…

Motor Load, Torque, and Power Quality Requirement

An electric motor is a gadget that changes electrical energy into mechanical energy over to follow up on a mechanical burden. The weight set on the motor because of this mechanical movement is known as motor load. Appropriately matching the motor burden to the engine is vital to forestall harm to the engine or wasteful and unnecessary expensive activity. Engines perform such undertakings as moving a thing starting with one spot then onto the next, cutting it, changing its shape, etc. The motors might be evaluated as far as a few variables including power yield, voltage, current, and temperature. Harm to an engine might happen when it is worked under over the top engine load contrasted with its appraised limit.