The alternator from the portable power supply is disconnected from the transformerand lamp. Explain why the handle of the alternator becomes much easier to turn.

Q: 4. The simplest way to reverse the rotation direction of a three phase AC motor is Use stator CEMF…

A: In this question we will write about the simplest way to reverse the rotation direction of three…

Q: The voltage of an alternator rises from 460 volts at full load to 535 volts at no load. Calculate…

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Q: Identify the DC Generator used for Arc Welding purposes. with a neat sketch explain its working.…

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Q: riefly explain combined cycle power and cogeneration?

A: The explanation is as follows.

Q: What is the name of the voltage when the field current is zero of the open circuit of the DC…

A: In DC generators, there will be voltage present in the machine even when field current is zero.

Q: draw the schematic wiring diagram of a motor control for wye delta connection of an electric motor

A: Wye delta connection is commonly used in starting of a electric motor. It has many benefits of…

Q: A series DC generator has an output voltage of 200 volts, an armature resistance of 0.070 and an…

A: Consider the formula for the EMF is. E=V+IR Here, R is the combined resistance of field winding and…

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: Which of the following is/are a part a generator's electric circuit? a) the commutator b) the…

A: The explanation is as follows.

Q: Rotor of the electrical machine, having 8 poles, is turned on 360 electrical degrees. How much is…

A: The mechanical degree corresponding to the electrical degree of the electrical machine needs to be…

Q: Explain the functions of generators and transformers in a power system.

A: Functions of generators and transformers in a power system.

Q: Armature current is the current that flows in the: Select one: O a. Transmission line O b. Rotor of…

A: Generator convert mechanical power in to electrical power. Generator work on the principle of…

Q: A 2-pole d.c. shunt generator has a useful flux per pole of 0.03 Wb. The armature winding consist of…

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Q: 11   Which of the following machine will have the field winding with low value of resistance. a.…

A: We know that series field winding have low resistance and shunt field winding have high resistance.…

Q: 2. Calculate the power produced by the generator. 3. What are the main features of the series field…

A: Power produced by generator

Q: A DC generator with an armature resistance of 0.3 ohm and a shunt winding resistance of 125 ohm…

A: For generator ,  Armature current = Load current + shunt field current  developed power = Armature…

Q: 7- Does the frequency of the generated voltage depend on the rotor speed? Explain. 8- Draw the…

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Q: how to connect 4 dynamo to create a small wind turbine for a project?

A: Here we discuss the way to connect 4 dynamo to create a small wind turbine for a project

Q: How does the speed of the generator change with wind speed?

A: Generators are used to convert mechanical power (which is fed either from wind, hydro or coal ) to…

Q: The ac armature winding of an alternator isA. Always Star connected. B. Always delta connected

A: The solution is provided in the following section:

Q: What will happen if the DC voltage in the clamping circuit is replaced by an AC source?

A: A clamper circuit converts an AC signal to a DC signal. In fact, clamping circuits can be used to…

Q: What is the speed of a 100 Kw, 230 Volts , 3 phase , 4 pole , 60 Hz , alternator 1800 RPM 1700 RPM…

A: Consider the formula for the speed is, N=120fp Here, f is the frequency  and p is pole.

Q: Compare AC Motor and DC Motor - Types of AC Generator and its explanation

A: S.NO. AC MOTOR DC MOTOR 1. Alternating current drives these electric motor An electric motor that…

Q: What happens if the primemover of an alternator is removed after connecting to the infinity busbar?…

A: What happens if the prime mover of an alternator is removed after connecting to the infinity bus…

Q: What are the different maintenance that need to conduct on the GENERATOR and explain. a. Breakdown…

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Q: An asynchronous generator can normally be started (a) Off-line (must be disconnected from the grid)…

A: Induction generator Induction machine when used as generator then its is called as a induction…

Q: generator is 600 RPM, and on load generated voltage is 110 V. Calculate Q3) A 4 pole wave wound…

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Q: Given field excitation at 10A in an alternator that exerts current of 150A (short circuit) and a…

A: The solution is given below

Q: The factors effecting the speed of dc motor are The flux p and the voltage across the armature the…

A: This is a simple problem based on dc motors specifications. In this we are given two questions ,…

Q: "The series field winding of a 170 kW, 250 V, 1450 rpm compound generator has a resistance of…

A: The series field winding of a compound generator has the given value Power Pl=170 kW=170000 W…

Q: Identify the machine where the Rotating magnetic field is produced. a. Three Phase Induction Motor…

A: We need to Identify the machine where the Rotating magnetic field is produced. a. Three Phase…

Q: Make a circuit to control the 3-phase AC motor, such that it will turn on when the on button (NO) is…

A: Make a circuit to control the 3-phase AC motor, such that it will turn on when the on button (NO) is…

Q: What is the effect of an unbalanced load on the output voltage of an alternator?

A: The explanation is as follows.

Q: A 1-o On-Off AC voltage controller has the supply voltages of 220 volts and rms output voltage is…

A:

Q: What causes sparking at the brushes

A: In this question, we need to discuss about the cause of the sparking at the brushes.

Q: The highest speed at which a 50 HZ alternator can be operated?

A: In this answer let us try to obtain the highest speed at which the alternator can rotate as shown…

Q: What is a dynamometer? How are dynamometers classified? Describe and differentiate hydraulic and…

A: A dynamometer is a device that is generally  used to  measure the rotational speed , torque of the…

Q: Q3//The armature of a 6600 volt, three-phase, 20-pole, 300 rpm star-connected alternator has 180…

A: The number of slots per phase can be calculated as =1803=60

Synchronous Generator

In comparison to an asynchronous generator, it is a machine where the rotor speed is equal to the rotating magnetic field produced by the stator, i.e., mechanical speed is equal to the electrical speed, thus called synchronous, and not asynchronous.

Salient Pole Rotor

Salient pole rotor includes a large number of exposed poles mounted on a magnetic wheel. The construction of a bright pole is as shown in the image on the left. The proposed poles are made of metal laminations. The rotor winding is provided on these poles and is supported by pole shoes.