The maximum speed of an alternator working at 60 Hz is possible when the number of poles of the machine is

Q: A 220V DC motor rotating at 1500 rpm (revolution per minute = devir/dakika (d/d)) draws 10A. The…

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Q: Derive the equation (Rule) step by step, to calculate the secondary induced emf of a static…

A: Consider the static electric machine is the transformer. Then, the emf equation of the transformer…

Q: Qn 1. Explain the working of the Induction Generator with a diagram with the reference

A: The induction generator is an induction motor that is made to work as an induction generator. The…

Q: An alternator has 6 poles and runs at 1,000 rpm (a) what is its generated frequency? (b) What must…

A: (a) The speed of the alternator is given by the expression as shown below:  Ns=120fP Plugging the…

Q: The state equations of the machine given in the figure are > CIk K > CIk Clock.

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Q: . What are the various losses in an induction motor? On what factors do they depend

A: The fallowing are the various losses that occur in an induction motor:

Q: MCQS A dc motor develops of torque of 100 Nm at 1000 rpm. If the motor now runs at 1200 rpm, the…

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Q: b) There are several ways for testing DC machines, mention detail with illustrations.

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Q: Describe the characteristics and principles of operation of AC and DC generators and the features of…

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Q: A brushless DC motor whose converter's output is a

A: Brushless DC motor In a Brushless DC motor, the stator is made up of a permanent magnet in the form…

Q: How many poles are required on an alternator which runs at 300 rpm to develop

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Q: Q15. A synchronous machine is connected to power grid. When its operating mode changes from…

A: When a synchronous generator is connected to grid it will supply the required power to the load…

Q: If the emf in the stator of an 6 pole induction motor has a frequency of 60 Hz and that in the rotor…

A: Rotor  frequency = slip× stator frequency.  Motor speed = (1-slip)×synchronous speed. Sycronous…

Q: An alternator has 8 poles. (a) At what speed must the machine be driven to develop 75 cycles? 40…

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Q: 2.A single-phase semiconu small separately excited d. is connected to à single - p = 0.50 ohm and…

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Q: 1.72 At 1200 rpm the induced emf of a dc machine is 200 V. For an armature current of 15 A the…

A: we need to find out torque.

Q: A certain dc motor produces a back emf of EA=240 V at a speed of 1200 rpm. Assume that the field…

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Q: 1. Compare the reaction of Dc motor and dc generator. Also explain rule by which DC generator/motor…

A: The effect of the armature flux on the main field flux is known as armature reaction. It causes very…

Q: alternator has 6 poles. (a) At what speed must the machine be driven to develop 60 cycles? 25…

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Q: Explain in details how the separately-excited de generator works?

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Q: Explain the Construction and Applications of DC Machines.

A: Construction of a DC machine: The DC machine consists of two main parts: Stator and Rotor 1. Yoke:…

Q: Two identical 2,000 kW alternator operates in parallel. The governor of the first machine is such…

A: It is given that: Rating of alternator=P=2000 KWFrequency drop of first machine 1=∆f1=50 Hz-48 Hz=2…

Q: Q/ The resistance of field circuit of a shunt -excited d.c. generator is 200 Ohm.when the output of…

A: Drawing the circuit diagram of dc shunt generator, Shunt current is equal to,

Q: 3. Determine the efficiency of a 1500 kVA, 2300V, 3-phase Y-connected alternator, which operates at…

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Q: Draw and explain a typical power curve for a wind turbine and write the definition of the four…

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Q: A shunt generator delivers 195 A at a terminal p.d. of 250 V. The armature resistançe and shunt…

A: Generated emf = terminal voltage +voltage drop in armature resistance.  Armature current = load…

Q: (a) Describe a single wire DC motor with the help of a diagram. (b) Illustrate the physical…

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Q: b) at half the speed. The output voltage is now 190 V The actual wind speed is lower than rated, so…

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Q: A dc shunt motor developes 10 HP at 8000 rpm when drawing a line current of 40 A at 220 V. Find the…

A: Given, Developed power, Po= 10 HP= 10×746= 7460 Watt Speed, N= 8000 rpm Line current, IL= 40 A…

Q: Answe completely and elaborate complete details. No plagiarism 1.) Define the working principle of…

A: AC motor: The motor converts the electrical current into mechanical power. This type of motor is…

Q: A dc series motor takes 18 A from a 220 V main and runs at a speed of 750 rpm. When this motor is…

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Q: A DC motor in derivation has an armor resistance of 0.2 Q and a field resistance of 50 Q. A 100 V…

A: Based on the given data, the circuit arrangement will be as…

Q: Draw the circuit diagram of self excited DC shunt generator, mark all current and voltages and write…

A: in the self excited dc shunt generator the shunt field winding is connected in parallel with the dc…

Q: Q3. Draw the curve showing the effects of increasing load on different types of dc generators

A: Form Load characteristics of DC generators. let, V → Terminal voltageEg → Generated EMFφsh → Shunt…

Q: (c) Electric machines can be classified into two categories, state both categories. (d) Describe…

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

Q: What is the effect of the field excitation to the short circuit current of the alternator?

A: The short circuit current of alternator is given as: Ia=EfjXs Here we have neglected armature…

Q: Answer that have you learned: a. Discuss the working principle of induction generator. b. What are…

A: Given that  A) principal of induction generator  B) applications for induction generator

Q: Q11: we control the direction and speed on DC Motor in the class: a) True b) False

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Q: A wind turbine of the 3-bladed propeller type, having 50% efficiency, generates 2 MWe when the wind…

A: Writing the expression for power generated by turbine as follows:P=12ρAV3ηCpwhere,ρ=density of the…

Q: Q2 : What the important characteristics of a d.c. generator explain briefly.

A: The important characteristics of DC generator are as follows: 1) Open circuit characteristics : This…

Q: induced emf in a dc machine when running at 500 rpm is 180 v. calculate he induced emf while the…

A: Given data : N1=500 rpmN2=600 rpmE1=180 V

Q: solve it using the data given, what is the best possible option? a. The input power drawn is equal…

A: In this question we will solve AC machine related questions....

Q: With neat diagrams, explain the development and effects of armature reaction in an alternator.…

A: As you have asked many sub-questions, I will answer the first two questions. You can ask the…

Q: Q5) discuss two only : a) the frequency of an alternator. b)what is the disadvantages of split phase…

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

Q: A motor’s rotor spins at 1,000 rpm when no load is applied (i.e. torque = 0), but reduces to 900rpm…

A: GivenNo load speed(No)=1000 rpmrated speed (Nr)=900 rpmrated torque (Tr)=2.3 N-mInput power =500…

Q: A DC motor has an equivalent circuit shown below. The motor is driving a load, and it draws an…

A: The solution can be achieved as follows.

Q: The developed torque of the dc motor at standstill is: Select one: Lower compared with AC motor O…

A: we need to know developed torque at DC motor compared to the AC motor at standstill

Q: Discuss the Power transmission from home to powerplants and provide a picture

A: The best thing about electricity transmission is that electricity can be generated at one end of the…

DC Generator

An electromechanical machine which converts input mechanical energy to respective output electric energy is called a generator.