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

Q: 22/ What is the armature current value of the DC motor at starting of the Motor?  a. less than 10…

A: To start a dc motor we need high current. As initally the volatge is very small in dc motor.

Q: Explain the principles of DC motors, including the DC permanent magnet motor and how it can  have…

A: PMDC motor: This is a DC motor having a permanent magnet pole. This motor has no field is present,…

Q: 440-V shunt motor has armature resistance of 0.02 ohm and field resistance of 500 ohms. Determine…

A: In this question we will find find back emf....

Q: Explain any one type of enclosure used in DC motors with necessary diagram

A: Electrical machines can be either generator , transformers or motors. They can be either Ac machines…

Q: Q3) A series dc motor runs at (700 RPM) when connected to (300 V)supply and draws (28 A). The…

A: A DC machine is classified in two types DC motors DC generators Above question is based on DC…

Q: With a neat sketch, Explain how a motor can be controlled with the help of PLC

A: A PLC has to start a Motor when we press the Start button. It has three types of interlocks which…

Q: A DC shunt machine generates 250 Volts on open circuit at 1000 rpm, armature resistance including…

A:

Q: A small series-wound dc motor is operated from a 12-V car battery. Under a normal load, the motor…

A: The circuit diagram for the series motor is given as  now according to the first condition , under…

Q: Q3) A series dc motor runs at (700 RPM) when connected to (300 V)supply and draws (28 A). The…

A: Given data: N1=700 rpmN2=1000 rpmVs=300 VIs=28 ARa=0.2 ΩRse=0.1 Ω

Q: Explain speed control of a separately excited dc motor

A: Those methods are given below :- i)Field control methods:    As the field gets weakened it causes…

Q: A 220 volt dc series motor is running at a speed of 800 rpm and draws 100 amperes. Calculate at what…

A: Given data, The value of voltage is V = 220 V. The value of speed is N1 = 800 rpm. The value of…

Q: A dc shunt motor supplied with 220 V, armature resistance is 0.1 Q and armature current is 80 A.…

A: Back emf given by  Eb = Vt - IaRa Given Vt= 220v, Ia = 80A , Ra= 0.1ohm

Q: Some Unique Features of the Hysteresis Motor

A: Hysteresis motor is a type of motor which comes under the category of synchronous motor which has…

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: A DC shunt motor takes 80KW input at a terminal voltage of 400 Volts and running at 620 rpm. The…

A: A DC shunt motor 80KW input at a terminal voltage of 400 Volts and running at 620 rpm. The armature…

Q: Identify the DC Motor used for Elevator. With a neat sketch explain its working. List it's…

A: DC Motors are used in various applications, Elevation is one of them.

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: The direction of rotation of a DC shunt motor can be reversed by interchanging Either field or…

A:

Q: A 220V. dc series motor is running at a speed of 800 rpm and draws 100 A. Calculate at what speed…

A: It is given that: Vt=220 VN==800 rpmIa=100 ARa+Rse=0.1Ω

Q: A 55 hp, 440 V, 400 rpm DC shunt motor draws 107 A when operating at rated conditions. The motor has…

A:

Q: vibration motor

A: Motor alludes to any power unit that creates movement that is a prime mover, while "electric engine"…

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: How can you determine the current that a direct current motor will draw at start-up

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

Q: Q2- What is the Working Principle of DC Servo Motor

A: The  precise control of motor in terms of position of angle of the rotor, acceleration and velocity…

Q: 120V dc shunt motor runs at 800rpm when the armature current is 20.7A. If the armature resistance is…

A: Power developed =Back emf ×armature current.  Power developed =2π×speed×torque60

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: Q3 (a) (b) (c) Describe types of DC motors with description and its equivalent circuit. Illustrate…

A: TYPES OF DC MOTOR Separately Excited DC Motor Since name implies, in separately excited DC motors,…

Q: HOME WORK: Draw the block diagram of dc motor

A: Take a DC motor which has a armature circuit shown with Rotor free body diagram V-input voltage…

Q: Q7/ What are the advantages and disadvantages of the permanent magnets dc motors?

A: Permanent magnet DC motors produce a flus that is constant unlike an electromagnetic excited DC…

Q: A dc motor will runaway if it runs at over-rated load with armature reaction: Select one: a. none of…

A:

Q: Briefly compare DC Motor drives and AC Motor drives

A: Electric Motor Drives:- An electric drive is a mechanical or electrical mechanism that regulates the…

Q: Give reason why dc motor requires starter.

A: When a DC supply is given to a motor through brush and commutator then the commutator generates a…

Q: The current drawn by 220 V dc shunt motor of armature resistance 0.5 ohm and back emf 200 V is

A: Given, A DC shunt motor having Supply voltage, V=220 V Armature resistance, Ra=0.5 Ω Back emf,…

Q: Assume that the voltage waveform of problem 1 is applied across a DC motor with the following…

A: The voltage wave form for DC motor given Motor Armature Resistance = RA = 6 Ω Motor Armature Current…

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: xplain with aid of a diagram how armature speed control of a dc motor is attained

A: DC motor : A DC motor is an electric machine that transforms electrical power into mechanical power.…

Q: Q1. (a) Describe the working principle and characteristics of the following special machines: (i)…

A:

Q: Identify the DC motor that can be used in Electric Traction

A: DC MOTORMotor work on side of excitation which is that the side of excitation electrical when…

Q: (2) The starting current of the DC motor is: a- Twenty times the rated current. b- Nine times of the…

A: There are two types of DC Motor. Separately excited DC motor and Self excited DC motor.In self…

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: 5. Which one of the following types of motors is not normally reversible? A. PM motor B. Brushless…

A: Motor:  A mechanical device that transforms electrical energy into mechanical energy is known as an…

Q: Identify name of the DC motor that can be used in Electric Traction

A:

Q: A shunt motor draws current of 60 A from a 120V source rotating at 1800 RPM. If the armature…

A: “Since you have posted a question with multiple sub-parts, we will solve first three subparts for…

Q: A separately excited motor develops 700N.m torque while drawing 35 amperes armature current. what is…

A:

Q: A 220 V, separately excited D.C motor runs at 600 rpm when the armature current is 50 A with rated…

A: Dc motor

Q: Explain how the DC and BLDC Motor works!

A: DC motor: it works on principle of Lorentz law. It is an electromechanical conversion device.…

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.