Which of the following method is used to control the speed of DC motor above its rated speed? A)Armature control B)Voltage control C)Field control D)None of option

Q: 12 pole DC shunt generator has an armature resistance of 0.02 2 The armature is lap wound with 620…

A: The solution can be achieved as follows.

Q: belt driven 100 Kw, shunt generator running at 300 rpm on 220 V bus bars continue to run as a motor…

A: In this question we will find speed...

Q: A 250v dc shunt motor has an armature current of 20A when running at 1000rpm. The armature…

A: In this question we need to find a external series resistance inserted in series with the armature…

Q: 1. A 230 V shunt motor takes a total current of 25 A. If the field winding resistance is 100Ω and…

A: Armature current=Total current-shunt field current. shunt field current=Voltage across…

Q: Q1) A 350 V shunt motor runs at its normal speed of 12 rev/s when the armature current is 90 A. The…

A:

Q: A 20kW, 200V dc shunt motor has an electrical efficiency of 86% and an armature resistance of 0.25Ω.…

A:

Q: The armature and field circuits of a 230-volt shunt motor have resistance of 0.31 and 115 ohms…

A: For  shunt motor,   Counter emf = terminal voltage- voltage drop in armature resistance.  Armature…

Q: What is the name of the speed control by varying the field current of the DC motor? O a. None of the…

A: Because the field current produces the flux, and if we control the field current then the speed can…

Q: d.c. shunt motor has the armature and field resistance is 0.010 and 50 Q, when the input power is 60…

A: In this question dc shunt motor is given....We have to find out total armature power developed...

Q: Choose a modern house of your interest, identify any ONE application of the DC electrical machine in…

A: As per our guidelines, we can only answer a maximum of three sub-parts at a time. Please resubmit…

Q: rmature resistance of a 230V shunt motor is 0.6 Ω and no load current is 2.5A. When the rotor is…

A: in the shunt motor the vlaue of the speed in inversely proportional to the flux and directly…

Q: The field winding of a shunt motor has a resistance of 110Ω and the voltage applied is 220V.What is…

A: For the Given Shunt Motor,

Q: 20 kW., 200 V. shunt generator is operated at rated load. If the driving engine is developing 30 Hp,…

A: In this question dc shunt generator is given...We have to find out iron and friction losses with…

Q: What is the name of the speed control by varying the field current of the DC motor? a. Flux control…

A: Choose the correct option What is the name of the speed control by varying the field current of the…

Q: ) is the ac output power sourced from the rotor or the stator? b)is the dc field currrent supplied…

A: a) we take the AC output power from the stator because alternator operate at high voltage rating so…

Q: A short shunt compound generator supplies a current of 100A at 220V. If the resistance of the shunt…

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

Q: . The output of a shunt generator is 500 A at a terminal voltage of 225 V. Armature resistance is…

A:

Q: What is the function of the DC motor armature Choose one answer: a. Performs the function of force-…

A: According to guidelines we need to solve only the first question. According to the question we have…

Q: Q2 Choose a modern house of your interest, identify any ONE application of the DC electrical machine…

A: Part d: The function of the DC shunt motor: In the dc shunt motor, a field winding is connected in…

Q: Q2] What is the Ward-Leonard motor control system? What are its advantages and disadvantages?

A: The explanation is as follows.

Q: A 240 V, shunt DC motor takes an armature current of 20 A when running at 960 rpm. The armature…

A: Given that Ia1=20 Ara=0.2 ohmN1=960 rpmVt=240VIa0(no load)=1A calculate back emf for both condition…

Q: A belt-driven 202 Hp shunt wound DC generator is running at 465 rpm and is supplying full load to a…

A: Given  Belt driven  Shunt compound DC generator of output P0= 202 Hp The speed N=465 rpm The busbar…

Q: hen the armature current of a 220 Volt DC shunt motor is 40 Amperes, when the magnetic flux suddenly…

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Q: A 350 V shunt motor runs at its normal speed of 720 r/min when the armature current is 90 A. The…

A: Given: V=350V N1=720rpm shunt motor Ia=90A Ra=0.3Ω E=V-IaRa

Q: e) The motor is now connected differentially compounded. What is the motor's field current in (A)…

A: From the circuit diagram, IF=V(RF+RAdj)=240(75+175)=0.96 A From the table given in question,  EA…

Q: A 220 V shunt motor takes a total current of 50 A. If the field winding resistance is 80Ω and the…

A:

Q: Suebied SPeed con trol of SeParately Shunf DE Motok Q) mention fhead vantuges and disadvaufages of…

A: Separately Excited Shunt DC Motor is a motor in which the field winding is connected to a separate…

Q: What is the name of the speed control by varying the flux of the DC motor? a. Flux control method b.…

A: Choose the correct option   What is the name of the speed control by varying the flux of the DC…

Q: When the voltage across armature circuit resistance decrease then the speed Ans/ 1/ Increase 2/…

A: Speed of motor is directly proportional to back emf so as voltage decrease results in decrement in…

Q: A shunt motor, supplied at 250 V, runs at 900 r/min when the armature current is 30 A. The…

A: Given data Voltage is V1 = 250 V Speed is N1 = 900r/min. Armature current is Ia1 =30 A Speed is N2…

Q: The field and armature resistance of a 400 V shunt motor are 200 ohms and 0.1 ohms, respectively.…

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Q: One of the following is used to control the speed of the motor. O a. Varying field voltage O b.…

A: Correct option is Varying supply voltage we can control the motor by varying it's supply  voltage…

Q: A variable-speed electric drive can operate in two distinct speed control regions. Name these…

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Q: A dc shunt generator produces 450 A at 230 volts. The resistance of shunt field and armature winding…

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Q: A shunt motor running on no-load takes 5 A at 200 V. The resistance of the field circuit is 150 Ω…

A: Given Data V = 200  V Io = 5 a Rf = 150 ohm Ra = 0.1 ohm

Q: How to avoid the effect of the high current at starting of the Motor? a. variable resistor is…

A: The induction motor takes a very high starting current so it is required to minimize the starting…

Q: A 50 hp, 220 V shunt motor operating at 1200 rpm draws a line current of 94 A when operating at…

A:

Q: Explain the construction of AC servo motor, also draw its diagram

A: AC SERVOMOTOR: AC servomotor is a type of servomotor that uses electrical input and produces…

Q: a) Draw the armature and excitation circuit of the motor and write the formulas for the equivalent…

A: a. For speed control DC shunt motor is preferred the formula for the equivalent circuit…

Q: Speed of the motor is  can be varied by varying  _________________. a. Field Voltage b. Armature…

A: In this question we will write how we can change of paper of motor...

Q: Q24 (6) A shunt motor supplied at 230 V DC runs at 900 RPM when the armature current is 30 A. The…

A: Given data, Terminal voltage V = 230 V. In first case, Armature current Ia1=30 A. Speed N1=900 rpm.…

Q: When the armature current of a 220V DC shunt motor is 40Amper, the armature current of the motor…

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Q: A 25 kW, 250 V dc shunt generator has armature and field resistance of 0.06 ohm and 100 ohms…

A:

Q: Write down the specification of motor and stator for (a) DC motor (b) AC motor

A: DC Motor:- A group of rotating electric motors that use direct current (DC) electricity to create…

Q: A shunt motor designed to operate at 115 V, has an armature resistance is 0.12 ohms and the motor is…

A: Armature current =(terminal voltage- back emf)/(armature resistance+ external resistance).

Q: With aid of a diagrams explain how the starter of a DC motor works

A: DC motors are protected by starters from damage caused by extremely high current and torque during…

Q: resistance of the 7.5 kW, 220 V that the current will not exceed 2 times the motor full-load value.…

A:

Q: A 4-pole d.c. motor takes an armature current of 150 A at 440 V. If its armature circuit has a…

A: It is given that: P=4 PolesIa=150 AVs=440 VRa=0.15 Ω

Q: need in 5 mins urgent please* A shunt motor connected to a 230-V supply has an armature resistance…

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Q: 415 V Shunt motor takes a total current of 80 A . if the shunt field resistance is 40 ohms, the…

A: In this question. We will find cu losses , output power and efficiency..

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.