When is necessary to privide automatic control of the voltage output at constant speed, the generator selected is a

Q: A 500-kW 250-volt 8-pole generator has a duplex winding. Determine the current per armature path.…

A:

Q: 8. At what speed (r/min) will an eight-pole, 50 Hz, 240 V ac motor run?

A:

Q: Copmpare between servo motor and 2phase Compare between drag-cup rotor and solid iron rotor 12:41 ✔

A: A Electrical motor is a a device which generates motion usually at a principal axis. Motor are of…

Q: The synchronous speed of an induction motor is 1000O rpm. What will be slip when it is running at a…

A: Given: Synchronous speed of induction motor, Ns=1000 rpm Rotor speed, Nr=960 rpm

Q: 1. What is mean by Sequential connection. 2. What is the benefit of using the connectors (C1, C2) in…

A:

Q: Incorrect Question 25 A compound DC generator consists of which of the following. None of the…

A: For every DC generator there will be a armature and field coils. Based on field winding there will…

Q: which can be used in applications where speed ratios other than 2:1 are required. The motors…

A: INTRODUCTION                  The star windings for pole-amplitude modulation of…

Q: T or F, modify the wrong part if False, please underline twice your answer if True or False.  The…

A: We need to tell about whether the given statement is true or false

Q: Braking system is used in Energy meter to stop the rotating disc when the load current is O a. Full…

A: Let us try to understand the purpose of braking system employed in the energy meter as discussed…

Q: a constant-torque two-speed motor is connected

A: When a constant torque of two speed motor is connected to ac lines to run at high speed .It's means…

Q: QUESTION 26 fa stepper motor has a step angle ( ß ) of 15 degrees, what is the rotational speed of…

A: Given :-  If a stepper motor has a step angle (B) of 15 degrees, what is the rotational speed of the…

Q: MAB orque in pound-feet. The inrush current to a synchronous motor is 235 amp when it is started…

A: Synchronous motor depend on interaction of magnetic field stator and rotor. stator contain the three…

Q: Question 8 9 of windings draw heavy current at startup and are switched out of the power circuit by…

A: 8)  Windings that draw heavy current at startup and are switched out of the power circuit by the…

Q: 1- Series motors are usually directly coupled to the load (True or False)

A: In DC series motor, the field winding is connected in series with armature. The field winding should…

Q: نقطتان )2( During the test of the shunt excited d.c. motor the load is increased and the speed is…

A: Yes the above statement is absolutely true.

Q: A series motor is best suited for driving * O shears and punches machine tools cranes and hoists O…

A: A series motor is a DC (direct current) motor. Series motors are very important to drive loads.

Q: The fixed part of an electrical motor is called ........................... .

A: The parts of electrical motor are 1. Armature 2. Stator 3.shaft 4. Bearings  5. Carbon brushes 6.…

Q: 1. If we decrease the input voltage of an asynchronous motor and the load is not changed, then its…

A: We are authorized to answer only1 question at a time since you have not mentioned which question you…

Q: A series motor has an armature resistance of 0.20 and a series field resistance of 0.302. It is…

A:

Q: Series motor can be used in cranes upward and downward motions. O True O False

A: In this question we will write about dc series motor...

Q: Q/Fore the d.c series motor loaded by d.c. generator, when the load resistance is high then the…

A: For the DC series motor loaded by DC generator, when the load resistance is high then the speed of…

Q: The NEC requires that each phase of a motor be protected by an overload relay.

A:

Q: Indicate whether the following statements are true or false and correct the false statements are…

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

Q: The minimum operational speed of the wind turbine is called Select one: Rated Speed O lock-in speed…

A: The minimum operational speed in wind turbine is 6 to 9miles per hour.

Q: A certain shunt motor armature has a resistance of 0.07 2 and current of 50 Amperes at 120 Volts.…

A:

Q: Which of the following statement is correct according to the Wind Energy Conversion System? O a.…

A: consider the given questtion;

Q: The motor which can be used to perform low performance requiring applications is synchronous drive…

A: The motor can be used to perform low Performance requiring application is?

Q: A three phase 6 pole 50 Hz induction motor is running at 5% slip. What is the speed of the motor?

A:

Q: Q/ During the test of the shunt excited d.c. motor the load is increased and the speed is held…

A: Testing of the shunt excited d.c. motor

Q: A series motor has an armature resistance of 0.202 and a series field resistance of 0.30. It is…

A:

Q: A stepper motor advances 2.5 degrees per step. How many pulses are needed to complete 8 revolutions?

A:

Q: A series motor has an armature resistance of 0.202 and a series field resistance of 0.30. It is…

A: Given:Series motorArmature resistance, Ra=0.2ΩSeries field resistance, Rs=0.3ΩV=240V

Q: r draws 80 A at 230 V and rotates at 1000 rpm. The armature and series fie 4 ohm respectively.…

A: In this question Dc series motor given... speed given on one current  ..We have to find out speed of…

Q: The synchronous speed of an induction motor is 1000 rpm. What will be slip when it is running at a…

A: Given an induction motor having, Synchronous speed, Ns=1000 rpm Rotor speed, Nr=960 rpm

Q: The dc motor has maximum current at start because: O The back emf is maximum. OThe back emf is zero.

A: here we have to find why the dc motor has maximum current at the start.

Q: The amount of short-circuit current from a motor is equal approximately to_current for each motor.…

A: to predict the answer for the question

Q: Question: Which motor can correct its speed when unexpected load is happen Servo Motor Stepper Motor…

A: Given that  Which motor can correct its speed when unexpected load is happen

Q: (a) A motor completes 100 revolutions in 5 seconds. What is its angular speed? грт

A: We are authorized to answer one question at a time, since you have not mentioned which question you…

Q: The DC compound motor is start by using the starter.

A: Answer is Four point starter For dc compound motor,  We will connect the  A to armature winfing L…

Q: (a) (b) Name and describe the features of the FIVE (5) types of generators. All generators are…

A: Given: (a) Types of generators.            (b) Potential prime mover of DC generator.

Q: 1.In order to have sparklesscommutation, the brushes should be placed along................. 2.D.C.…

A: 1. In order to have a sparkles commutation  , the brushes should be placed along MNA(magnetic…

Q: An induction motor has 4 pole and operated at 50 Hz, 230 Volt. Speed of induction motor is 1600rpm.…

A: Given values are - PoleP=4f=50HzVt=230VoltNr=1600rpm

Q: If Ta is increased by putting more mechanical load on the shaft of shunt motor, la will increase/d…

A: We are authorized to answer one question at a time since you have not mentioned which question you…

Q: 8. Which one of the following pitches is the minimum recommended pitch for a 24-pole motor with 360…

A: Given a motor with, Number of poles = 24 Number of slots = 360

Q: A 250 V series motor draws a current of 40 A. The armature resistance is 0.15 2 and the field…

A: The solution can be achieved as follows.

Q: Q1: Fill in the following blanks: 1. In order to have sparkless commutation, the brushes should be…

A: 1.  Brushes are placed along MNA because reversal current takes place along this axis. -MNA

Speed control of motor

Speed control by DC motor-speed controller is required to realize variable speed drive. Whenever a motor drives a particular load, it is called drive, and variable speed drive refers to a load requiring variable speed. All this is obtained by a DC motor speed controller.