Which of the following is an example of a manual speed controller for a wound-rotor motor? a. Variable frequency drive b. Timers/Control Relays c. SCR Controller d. Faceplate Controller

Q: motor has an armature resistance of 1.55 ohms. If the armature takes 14.8 amp at full load,…

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Q: 3. HOW THE BACK EMF OR COUNTER EMF IS PRODUCED? 4. DIFFERENTIATE THE TYPES OF DC MOTOR THROUGH: a.…

A: Since there are multiple questions asked in the same question, hereby solving the first question…

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: A 240 V DC shunt motor with an armature resistance of 302 draws an armature current of 5A to drive a…

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Q: nswer the following questions about a 460-V, ~-COlUlected. two-pole. 75-hp. 60-Hz.…

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Q: 1-D.C. shunt motor maintains a more constant speed under varying load. (True or False) 2-Dc shunt…

A: 1-D.C. shunt motor maintains a more constant speed under varying load.    2-Dc shunt motor is best…

Q: for the shunt excited motor running at 1250 rpm, the shunt field current is 0.6A and the armature…

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Q: The speed of dc shunt motor varies with

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Q: 3. What feature is found in servomotors but not in stepper motors? a. automatic c. forward b.…

A: Steeper motor operates in an open loop but Servo motor operates in a closed loop.

Q: List and briefly explain the three (3) control strategies used in AC variable speed motors

A: There are various  through which  we can control speed of AC can be achieved. The speed adjustment…

Q: Electrical Engineering.  Explain briefly in one sentence how do we maximize the value of the…

A: Consider the formula for the armature current in terms of terminal voltage and armature voltage is,…

Q: For the armature controlled DC motor shown, find the transfer function. Assume the following…

A: Solution

Q: for the shunt excited motor running at 1250 rpm, the shunt field current is 0.6A and the armature…

A: total current input to motor=Field current+Armature current=3.4+0.6=4 A Voltage input to rotor= 220…

Q: 17.A. The arrangement which can NOT be used to control the speed of a universal motor operating from…

A: Here we discuss about the universal motor & a 1phase ac motor.

Q: Q/ When a series dc motor is operated without a load, which of the following conditions occurs? *…

A: This is a basic concept question of electrical machines subject from the dc machines topic. In this…

Q: Q 2) A d.c. shunt motor has the armature and field resistance is 0.012 and 50 Q, when the input…

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Q: Q2) A d.c. shunt motor has the armature and field resistance is 0.012 and 50 Q, when the input power…

A: This question belongs to electrical machine . It is based on the concept of armature power developed…

Q: A 500-Volt shunt motor running at 720 rpm takes an armature current of 50A. The effective armature…

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Q: 1- Why the counter emf cancels part of the armature voltage?

A: One individual question is to be answered. 1. The counter emf cancels part of the armature voltage…

Q: (360 V DC serial motor has a starting current value of 60 A. Total armature resistance (Ra) value is…

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Q: for the shunt excited motor running at 1250 rpm, the shunt field current is 0.6A and the armature…

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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: 2. What happens if the additional resistance is added in series with armature? 3. What will happen…

A: 2. when an additional resistance is added to in series with the armature then the voltage drop of…

Q: 22.a. The maximum torque produced by a split-phase motor is also called the A. full-load torque. B.…

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Q: 21. A PM field servo motor may be equipped with a resolver that is used to A. prevent the brushes…

A: Concept- Resolver- (1) A resolver is a revolving electrical transformer that counts the degrees of…

Q: Please answer all subparts please answer in typing format

A: Step 1: Step 2: Step 3: Step 4:

Q: Explain the use of scr control used to control the speed of a DC motor?

A: Types of DC Machine Self-Excited DC Machine Shunt DC Machine Series DC Machine Compound DC Machine…

Q: Explain with mathematical reasons why direct current motors cannot be operated from a constant…

A: The voltage of the dc motor is as follows:   V=I.R+Ldidt+E   =I.R+EE=ke.ωso, V=I.R+ke.ωke=Electrical…

Q: 4. Explain the need, salient features and working with the help of a neat circuit diagram showing…

A: as per the guidelines, we supposed to answer one question at a time so please ask other questions…

Q: B.2. Discuss the advantages of following ac motor starting methods (consider Starting torque, the…

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Q: Q4 A- Illustrator the rotor of the following Motors? 1- Control Differential (CD) Synchro motor. 2-…

A: Q4) A)

Q: 2. The rated current of a 10 hp 230 volt 1500 rpm shunt motor is 37.5 A. The field current is 0.45…

A: The vector sum of all the external torques is the overall torque acting on the item. The total of…

Q: 1. Explain briefly in one(1) sentence how do we maximize the value of the armature current in a…

A: (1) When the load gets added to shunt wound DC motor the speed gets reduced and along with the speed…

Q: Name the DC motor , which is used for high starting torque application a. DC shunt motor b. DC…

A: which is used for high starting torque application?

Q: Q1) Synchronous motors are not self-starting machines. a) Briefly explain why this machine is not…

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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.