Why should the D.C series motor not be operated at no load and light load?

Q: No-load speed of which of the ollowing DC motor will be highest? *

A: For DC motor Eb∝Nφ Eb is back emf N is speed φ magnetic flux For DC series motor at no load current…

Q: The direction of rotation of Series DC motor can be reversed by interchanging terminal(s). 1) Field…

A: The change in the flow of current divert the direction of the spinning force, due to this the…

Q: What is the main precaution feature of running the series-wound dc motor Explain with the aid of…

A: The series-wound motor has poor speed regulation as compared to other DC motors. When the shaft of…

Q: A 240V DC shunt motor has a line current of 50A, The field and armature resistances are 120 ohms and…

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Q: In Experiment Star-Delta Starting of 3-Phase Induction Motor, How it was made sure in the control…

A: Star-Delta starter: This method can only be applied to the motor where the stator of the motor is…

Q: A shunt motor has a nameplate rating of 140 hp, 500 V, 205 A, 1700 rpm. The shunt field circuit…

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Q: 1- Why should the D.C series motor not be operated at no load and light load?

A: It is seen earlier that motor armature current is decided by the load. On light load or no load, the…

Q: load, ascertain whether it is running at lagging power factor or a leading power factor without the…

A: An AC motor is an electrical machine which takes AC electrical input energy and produces mechanical…

Q: Why it is not possible to start the d. C. series motor without load ?

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Q: What type of speed control method provides above the normal speed of the DC series motor? O a.…

A: Find method for above speed

Q: 6- If a D.C. shunt motor is working at no load and if the shunt field circuit suddenly opens (a)…

A: The answer is option c.

Q: 3- Why differentially compound D.C motor is unsuitable for any application.

A: in the differential compound, motor shunt field flux oppose the effect of the series field flux, so…

Q: The armature resistance, 0.15 ohm, shunt field resistance, 220 ohms and series field resistance,…

A: We will take ratio of back emf  under full and noload to find ratio of flux in no load and full…

Q: 3- Why is the starting torque of the series motor high?

A: In series motor torque is directly proportional to the square of armature current. The detailed…

Q: "Explain why speed of a DC motor get affected on load, if its series field winding is connected…

A: DC motor emf equation is given as, E=NPϕZ60AN=EA60PϕZk=PZ60ASo, N=EKϕ The torque equation of the DC…

Q: 4. A synchronous motor starts but fails to develop its full torque. What could it be due to?

A: I will be attending only question 4. Synchronous motor:                     Synchronous motors are…

Q: In a compound DC motor, why does the speed decrease by increasing the torque (the same voltage…

A: Torque and speed are inversely proportional. This is because the ability to generate torque…

Q: Synchronous motor when the load is taken completely while working at full load in all properties…

A: Synchronous motor is constant speed motor always rotates at synchronous speed Ns =120fP

Q: A 480 V, 100 kW, 0.85 PF leading, 50 Hz, 6 poles, Y-connected synchronous motor has a synchronous…

A: Given 480 V, 100 kW, 0.85 pf Lead, 6 pole synchronous reactance Xa =1.5 Ω  speed range 300 rpm to…

Q: lue increase as the torque value increases?

A: An asynchronous motor is also known as an induction motor. A three-phase balanced supply is provided…

Q: what is dc shunt and series motor?

A: Motor is an electrical machine which converts the electrical energy into mechanical energy. DC motor…

Q: Why is it advisable to start a d.c shunt motor with starting resistance maximum and resistance…

A: Because the DC motor has a huge starting current and currently can damage the DC motor's internal…

Q: Why is it recommended to start a d.c. shunt motor with the highest starting resistance and the…

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Q: Q: The cumulative compound dc motor can give a high starting torque .why?

A: A cumulative compounds motor is that which when the shunt field flux made by the shunt winding aids…

Q: How do you reverse the direction of rotation of a d.c. shunt motor?

A: The DC shunt motor has four terminals as stated below. a) two terminals of armature winding (A1 and…

Q: What is The Principle Of Operation Of A D.c Motor?

A: Since you have asked multiple question, we will solve the first question for you. If you want any…

Q: How the driving torque increases when the DC motor is suddenly loaded.

A: Torque produced in DC machine (separately/shunt ) is proportional to Flux per pole and armature…

Q: A 4.12 kV, 60 Hz, 3000-hp, 0.8 pf-leading, delta-connected, three-phase synchronous motor has a…

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Q: In a 5 HP, 230 V, 1500 rpm shunt motor, the resistance of the armature including brushes is 0.175…

A: According to the question we have to calculate the value of efficiency.

Q: Why Hysteresis Losses of DC motor is constant? O a. It depends on load O b. none of the above O c.…

A: The explanation is as follows.

Q: The field winding and armature resistance of a 230 V DC shunt motor is 230 ohm and 0.5 ohm…

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Q: Does the excitation circuit current change as the D.C shunt motor current changes? explain the…

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Q: Why is the starting torque of the series motor high?

A: The explanation is as follows.

Q: Discussions 1- Why should the D.C series motor not be operated at no load and light load?

A: Bartleby has policy to solve only first question and if it has any subparts then solve only first 3…

Q: Illustrate and compare speed current and torque current characteristics of a compound wound d.c.…

A: we need to compare speed current and torque current characteristics of a compound would dc motor,…

Q: A 25 hp,250V long shunt compound motor takes 5 A when running light and runs at 1150 rpm. Armature…

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Q: Type your question here The rotor of a 4 pole, 50 Hz, slip ring induction motor has a resistance of…

A: As per our policy we can provide solution of first question only. As we have given: P=4f=50…

Q: I Short answer questions 1- What is the functions of interpoles? v 2- What is the chief advantage of…

A: 1.Interpoles are similar to main poles in terms of winding but these poles are small in structure…

Q: Which of the following option is false for synchronous motor ? O It requires both D.C and A.C…

A: Choose the best option .    Which statement is false for the synchronous machine?

Q: What is the reason why a synchronous motor can be found running at no load?

A: we need to explain synchronous motor.

Q: Why it is not possible to start dc series motor without load?

A: In dc series motor motor, armature current is decided by the load. On light load or no load, the…

Q: What is the main precaution feature of running the series - wound de motor? Explain with the aid of…

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.