A18 The back e.m.fof a d.c motor at the moment of starting
Q: A d.c. shunt motor is running with certain load. The effect of adding an external resistance in…
A: A d.c. shunt motor running with certain load. the effect of external resistance adding to parallel…
Q: What are the following statements are true for DC Motor? I. Motor converts Mechanical Energy to…
A: Motor converts electrical energy to mechanical energy. Only I is false remaining true
Q: a) The motor slip b) The induced torque in the motor c) The operating speed of the motor if the…
A: Disclaimer: Since you have asked multipart questions, we will solve the first three subpart for…
Q: A 4-pole, 650v shunt motor has 720 wave connected conductors on its armature, The full-load armature…
A: Option C
Q: Which motor has poorest speed regulation
A:
Q: H.W. 1.5: A D.C. shunt motor, after running several hours on constant voltage of 400 V, takes field…
A:
Q: A 88 kW, 121 V DC short-shunt motor, being fed through a feeder with total resistance of 0.04 ohms,…
A:
Q: For switching OFF the motor normally open push butt Select one: O True False
A: The explanation is as follows.
Q: duction motor having
A: A three-phase 8 poles induction motor is given.
Q: A 50 V d.c. shunt motor has armature and field resistances of 20 and2 kQ respectively. When running…
A: In this we will find speed of dc shunt motor....
Q: 1) Which of the following rule is used to determine the direction of rotation of D.C motor: A.…
A: 1. The output of DC Motor is mechanical energy that is force. and to find the direction of force…
Q: The motor which can be used to perform the task at higher power levels is . O synchronous motor O…
A: Solution- The motor which can be used to perform task at higher power level is Synchronous motor.
Q: Q6 A). At full load of 15 h.p. of totally-enclosed fan cooled type motor has a temperature rise of…
A: Given data, In time t=0.5 hr the temperature rise is ∆T=25°C In time t=1 hr the temperature rise is…
Q: A starting torque of 80 Nm is developed in an induction motor by an auto-transformer starter with a…
A: Given data : T1 = 80 Nm T2 = ? Tapping N1 = 30 % Tapping N2 = 60 %
Q: bomel • A 230V shunt motor takes 5 am pe p noload. The resistances of the arma bore circuit are…
A: Given, A shunt dc motor has, Terminal voltage (Vt) = 230 volts No load current (Io) = 5 amp…
Q: / choose the correct answer The back emf in a dc motor is ___________________?. 1-opposes the…
A: Acccording to lenz's law effect oppose its cause.
Q: Explain with the principle of operation of the following machines with necessary diagrams: a) DC…
A: Given to explain: a) DC Motors b) Asynchronous motor c) Synchronous generator
Q: Explain the construction of AC servo motor, also draw its diagram. proper explanation
A:
Q: If the no load speed of a motor is 1000 rpm and it decelerates by 30 rpm at full load, find the…
A: NNL=No-load SpeedNFL=Full loadSpeed Regulation =NNL-NFLNFLSpeed Regulation =NNL-NFLNFL*100%
Q: Explain the effect of the generated emf of a d.c. motor and why a d.c motor starter is necessary.
A: Electrical machines are distinguished on the basis of their supply. There are AC machines for AC…
Q: 3. A 25 Kw shunt generator is delivering full output to 400V bus bars and is driven at 950 rpm by…
A: For generator Generator emf= terminal voltage +voltage drop in armature resistance. For motor,…
Q: Explain the construction of AC serve motor, also draw its diagram.
A: Construction AC servo engines are fundamentally two-stage squirrel confine acceptance engines and…
Q: Provided that the asynchronous motor driver keeps the slip value constant how does the speed of the…
A: Asynchronous Machine- An asynchronous motor is a machine whose rotor rotates at less than…
Q: 2. What type of DC Motor is shown below? Justify your answer in one(1) sentence. E. E. A. R.…
A:
Q: At no load, a 250V shunt motor runs at 1000 rpm and draws 8A. Armature and field resistances are…
A:
Q: Which one of the following is not a part of an induction motor? a. Starter b. Rotor c. Stator d.…
A: This question is based on the part of induction motor. Which is not part of induction motor?
Q: By looking at which part of the motor, it can be easily confirmed that a particular motor is a DC…
A: In this question we need to choose a correct option
Q: 40) 200V DC shunt motor with a constant main feild drives a load the tolque of which varies as the…
A: Above question is based on DC motor, the major classification of DC motor are Series motor Shunt…
Q: A 220v shunt generator has an armature resistance of 0.02 ohm and a shunt resistance of 44 ohms. At…
A: A DC machine is classified in two types. DC motors DC generators Above question is based on DC…
Q: 13. For an ideal gearing system, with N1 and N2 are the numbers of the teeth in the gear wheels the…
A: Given, Number of teeth in gear wheel of mechanical load is N1. Number of teeth in gear wheel in…
Q: B- Find power delivered to the de motor has operating voltage 120V and consume
A: Electrical machines can be either generator, transformer or motors. They can be either Ac machines…
Q: The DC motor is start by using the two point starter.
A: Given To find which DC motor is started by using two point starter.
Q: A dc motor will runaway if it runs at over-rated load with armature reaction: Select one: a. none of…
A:
Q: You decide to use DC motors to control the joints on a large fighting robot to protect your evil…
A:
Q: equirement of a DC Motor to be selected as a drive motor for Electric Traction.
A: The fallowing are the requirements that is to be fulfilled by a dc motor to be selected as a drive…
Q: If the losses of the armature wingdings of dc motor which is running at 1200 RPM is neglected and…
A:
Q: The armature resistance of a 250 V D.C. shunt motor is 0.5 Ω. The minimum and maximum current during…
A:
Q: Two shunt generators with an armature resistance and field resistance of 0.022 and 402,…
A: The solution can be achieved as follows.
Q: What is the effect of high current at starting of the Motor? a. Damaging the Commutator O b. Burning…
A: Choose the correct option? What is the effect of high current at starting of the motor?
Q: The field windings of a series motor has a resistance of 120 ohms at 15 ˚C. After running for two…
A:
Q: stion 1 "A DC machine consists of 4-poles and operating at 1500 rpm. Its frequency of the induced…
A: Speed of the machine = 1500rpm Pole = 4 Frequency in the armature?
Q: Calculate the speed of a 60-cycle, 14-pole motor if the slip is 5%
A:
Q: DC compound machine; Explain the starting of the engine.
A: Compound excited DC motor :- If in DC machine both winding series - shunt are present then we call…
Q: 1. Give detail explanation on why it is necessary to use d.c. motor starters for starting of d.c.…
A: DC motor - DC machine is not used in the present time. Day by day reduces uses in industrial purpose…
Q: Consider the following statements: Adjustment is required in an induction type energy meter in the…
A:
Q: Q2/A Shunt motor having a field resistance of 50 02 and an armature resistance of 0.5 is connected…
A: In this question we need to determine the speed of the motor when the load is changed such that it…
Q: determine "A" through "G" for the DC motor on worksheet 5 when it is running at capacity and its…
A: DC shunt generator Vt=125V IL=16amp Shunt winding current (If) =Vt/Rf If=125/50 If=2.5 amp
Q: Q31. A d.c. shunt motor runs at 500 r.p.m. at 220 V. A resistance of 4.5 Q is added in series with…
A: Given: DC shunt motorV=220VN=500rpmRa=.5ΩRs=4.5Ω
Q: 23.a. Which one of the following devices can be used to accurately and conveniently measure the…
A: Solution 23(a) - Let us first understand the basic function of all the given options, A. Tachometer…
Q: A shunt generator delivers 50kW at 250V and 400rpm with armature and field resistances 0.02 ohm and…
A: In this question, choose the correct option. What is speed of the machine if it is working as motor…
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- A stepper motor is configured in to a half step. If it rotate 32 steps. what data pulse is the last fed on the wires if the pulse starts with 1000? Select one: a.1010 b.0110c.1000 d.1100 e.0101The efficiency of 100 kW, 600V, 3 phase synchronous motor is 90%. When the pf is 0.9 leading, what is the armature current?When started by means of an autotransformer with 50% tapping, supply current at start of an induction motor is reduced to _______ of that when started by means of a star delta starter.
- DC compound machine; Explain the starting of the engine.A series motor runs at 800 rev/min when the voltage is 400V and the current is 25A. The armature resistance is 0.4 ohm and the series field resistance is 0.2 ohm. Determine the resistance to be connected in series to reduce the speed to 600 rev/min with the same current.At no load, a 250V shunt motor runs at 1000 rpm and draws 8A. Armature and field resistances are 0.20 ohm and 250 ohms, respectively. If the motor draws a current of 50A, its speed will be
- A 220V shunt motor draws 64A and runs at 500 rpm. Ra = 0.25 ohm, Rsh = 55 ohms. Determine the speed of the motor when a resistor of 20 ohms is inserted in the shunt field circuit and the load torque remains the same.A 440 V, shunt motor has armature resistance of 0.8 ohm and field resistance of 200 ohm. Determine theback emf when giving an output of 7.46 kW at 85% efficiency.Discuss the difference between D.C shunt motor and D.C series motor at load.
