a)Please explain the connection methods of Current and Voltage Transformers? b) Control the DC motor speed and direction. Draw the circuit.
Q: 4. for three phase induction motor, the decreasing in the starting torque when the motor started by…
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Q: vii. Why Induction motor is called rotating transformer?
A: Induction motor is sometimes called a rotating tranformer?
Q: 2) What are the salient features of supply voltage control method? Speed control three phase…
A: In this question we will write about speed control of 3 phase induction motor by supply voltage....
Q: 9- If the field current circuit of DC shunt generator is opened, there will no induced voltage in…
A: In this two statements are given .We have to write about them..
Q: 3. If the variable DC source is reversed, how does this affect the clipping?
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Q: Aside from the Electromagnetic Induction, what other principle is use for the generation of emf in…
A: Alternator:- A machine that transforms mechanical energy into AC electrical energy is called an…
Q: The core loss is the combined hysteresis and eddy current losses in the armature and field iron True…
A: There are two type of losses present in the machine copper loss core loss
Q: 6.9 justify the following statement: if the interpole winding is left unexcited, commutation will be…
A: Ans. True
Q: Explain the Commutation process in DC machines.
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Q: Q2B: Draw and explain the Torque-Slip characteristics of the 3-phase induction motor ?
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Q: 22 The DC voltage is generated in the Armature winding of DC Generator. Select one: True False
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A: Option B is correct. The explanation is provided below.
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: Draw the No Load characteristic From run (1) and calculate RF, show different lines of shunt field…
A: No load characteristic of a generator is drawn between open circuit voltage (Eo) and field current…
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A: Efficiency of transformer is given by ratio of output and input. Mathematically efficiency is given…
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Q: Discuss the following statements briefly 1. After performing the load-test on the induction motor…
A: Electrical motor torque is proportional to the product of magnetic flux and the armature current.…
Q: Draw the electrical equivalent circuits for long shunt compounded DC motor and short shunt…
A: No need for given data
Q: Hoq do current transformers differ from voltage transformers?
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A:
Q: Explain vector grouping of transformers with suitable diagrams. Mention its usefulness.
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A: The slip in an induction motor is the difference between the main flux speed and their rotor speed.…
Q: Question #1 Design the Lap winding diagram of DC machine based on the following parameters: • Number…
A: design the lap winding diagram of DC machine based on the following parameters: number of loops=12…
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Q: Why is it necessary to conduct polarity tests on transformers?
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Q: In DC Shunt generator, the armature winding and field winding are connected in series Select one: O…
A: 1) In DC shunt generator the armature winding and field winding are connected in parallel while in…
Q: Q12-Indicate whether the following statements are true or false and correct the false statements. 1-…
A: As per guidelines we are supposed to only first 3 questions so please upload others seperately.
Q: The core loss is the combined hysteresis and eddy current losses in the armature and field iron True…
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Q: Define the working of the DC generator with the properly labelled diagrams.
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A: i) Overload means nothing but the exceeding voltage and current from its desired limits. When…
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Q: Indicate whether the following statement are true or false * True False The type of dc generator…
A: The explanation is as follows.
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A: We have given the following problem
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A: Note: We are authorized to answer the first question since the exact one wasn’t specified. Please…
Q: 4. What for brushes are employed in DC generator?
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a)Please explain the connection methods of Current and Voltage Transformers?
b) Control the DC motor speed and direction. Draw the circuit.
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- Q choose the correct answer: 1-Brushless excitation system consisting of.... a- Stator field winding and power diodes b-stator and rotor field winding and capacitor c- stator and rotor field winding and capacitor d- Everything mentioned in the options 2- Voltage generated per phase in an alternator is proportional to a- Flux per pole b- Number of turns in armature c-Winding factors d- Everything mentioned in the options e- Frequency of waveform 3- If input mech. Power of SG constant, the functionality of AVR is a- Control flux of rotor b-Control terminal voltage c- Control flux and terminal voltage d-Control Load angleer C ai Exa (B)- Select the correct answer for the alternatives given. 1- A d.c. shunt motor is running with certain load. The effect of adding an external resistance field circuit is to a)-reduce the motor speed, b)-increase the motor speed, c)- stop the motor d)- reduce the armature current of the motor 2- The copper loss and iron loss of transformer at half load are 1600 w and 5000w respectively. The copper loss and iron loss at full load will be respectively. a)-(3200 w and 10000w), b)- (6400 w and 5000 w), c)-(6400 w and 10000w), d)- (3200 w and 1250w) Way t 3- The secondary winding of which of the following transformer is always kept close b)- auto-transformer, c)- current transformer, a)-power transformer d)-distribution transformer 4- A 6-pole lap wound de shunt generator is supplying 295 A to load. The field current of generator is 5A. The current parallel path is a)-300A 245)-145A b)- 150A, c)- 50A باب الثانيState the Method of connection of different field coils. ( In DC Machines )
- Question #1 Design the Lap winding diagram of DC machine based on the following parameters: • Number of Loops = 12 • Number of Poles = 4 • Winding Type = Progressive Duplex Lap Winding(B)-ndicate whether the following statements are true or false and correct the faise statements. -When a series d.c. motor is operate without load, the armature will not run. The strength of magnetic field in d.c. shunt generator can be varied by varying the polarity of the field poles The main disadvantage of series generators is Output voltage varies as the Toad varies There is no output from the transformer under short-circuit conditionsQuestion 3 – Direct Current Machines a) Describe, with the aid of diagrams, the construction and layout of the following dc motor field coil arrangements: (i) Lap Winding (ii) Wave Winding b) An 8-pole wave connected armature has 600 conductors and is driven at 570 revs/min. If the flux per pole is 25mWb, calculate the generated emf .
- Here it is the equivalent circuit of and induction motor and it is per phase circuit my question is name for me the variable for example R1 is the winding resistance and so an the all variable and please show me a pic of the real machine with the variable for example for R1 happens because of the winding i need to see the winding in the real machine, please help me to understand wellAsap, select the best answer. The application of a lap winding dc machine is in: A. low voltage, low current application B. low voltage, high current application C. high voltage, low current application D. high voltage, high current applicationQ/Two dc generators A and B has the following characteristics:GA: rated voltage=150 volt: rated carrent=30Ampere: armature resistance (0.4Ω).GB:no_lond voltage=160Volt: rated carrent=20Ampere: armature resistance=(0.6Ω).The generators are connected in paralled. Draw the circuit diagram, then find:no_load circulating current and no_load voltage?At what carrent the generator B will Be floating? The maximum possible land power