Get premium membership and access questions with answers, video lessons as well as revision papers.
Synchronous motor applications
(i) Power factor correction
(ii) Constant speed, constant load drives
(iii) Voltage regulation
Over excited synchronous motors having leading power factor are widely used for
improving power factor of those systems which employ a large number of induction
motors and other devices having lagging power factor such as welders and fluorescent
lights etc.
In constant speed applications, synchronous motors are well suited due to their high
efficiency and high speed, such as centrifugal pumps, belt driven reciprocating
compressors, blowers, line shafts, rubber and paper mill etc.
Voltage in long transmission lines varies greatly at the end when large inductive load
are present and when inductive load disconnected suddenly, the voltage tends to rise
considerably above its normal value because of line capacitance. Therefore, by
installing a synchronous motor with field regulator, the voltage rise can be controlled.
gregorymasila answered the question on February 20, 2018 at 16:25
- What are the essential differences between H.V. and L.V. switchgears?(Solved)
What are the essential differences between H.V. and L.V. switchgears?
Date posted: February 20, 2018. Answers (1)
- Why are different levels of voltages used for generation, transmission and
distribution of electric power?(Solved)
Why are different levels of voltages used for generation, transmission and
distribution of electric power?
Date posted: February 20, 2018. Answers (1)
- What do you mean by transmission line efficiency and regulation? Can it be
negative also?(Solved)
What do you mean by transmission line efficiency and regulation? Can it be
negative also?
Date posted: February 20, 2018. Answers (1)
- List out the advantages of nuclear power plants over conventional thermal power
plants.(Solved)
List out the advantages of nuclear power plants over conventional thermal power
plants.
Date posted: February 20, 2018. Answers (1)
- What are the various types of electric drives? Compare their advantages and
disadvantages. State and explain the various factors which affect the selection of an...(Solved)
What are the various types of electric drives? Compare their advantages and
disadvantages. State and explain the various factors which affect the selection of an
electric motor as industrial drive.
Date posted: February 20, 2018. Answers (1)
- Explain principle of carrier current protection and communication.(Solved)
Explain principle of carrier current protection and communication.
Date posted: February 20, 2018. Answers (1)
- Discuss the criteria for choice of voltage for transmission and distribution.(Solved)
Discuss the criteria for choice of voltage for transmission and distribution.
Date posted: February 20, 2018. Answers (1)
- Write short notes on Induction heating:(Solved)
Write short notes on Induction heating:
Date posted: February 20, 2018. Answers (1)
- Discuss methods of laying underground cables.(Solved)
Discuss methods of laying underground cables.
Date posted: February 20, 2018. Answers (1)
- Explain the working of nickel cadmium cells with its merits and demerits over lead acid cell(Solved)
Explain the working of nickel cadmium cells with its merits and demerits over lead acid cell
Date posted: February 20, 2018. Answers (1)
- What are the advantages of high voltage transmission? Give its limitations also.(Solved)
What are the advantages of high voltage transmission? Give its limitations also.
Date posted: February 20, 2018. Answers (1)
- List the advantages of nuclear power plants over conventional thermal power plants.(Solved)
List the advantages of nuclear power plants over conventional thermal power plants.
Date posted: February 20, 2018. Answers (1)
- What is the fundamental difference between thermal and nuclear power plants?(Solved)
What is the fundamental difference between thermal and nuclear power plants?
Date posted: February 20, 2018. Answers (1)
- What are different welding controls used in resistance welding?(Solved)
What are different welding controls used in resistance welding?
Date posted: February 20, 2018. Answers (1)
- With the aid of sketches explain the operation of a four stroke engine(Solved)
With the aid of sketches explain the operation of a four stroke engine.
Date posted: February 16, 2018. Answers (1)
- Name 3 drawing instruments commonly used in technical drawing and define the use of each tool(Solved)
Name 3 drawing instruments commonly used in technical drawing and define the use of each tool
Date posted: January 26, 2018. Answers (1)
- Highlight different methods of water treatment.(Solved)
Highlight different methods of water treatment.
Date posted: January 15, 2018. Answers (1)
- Name any five factors which determine choice of roof structure(Solved)
Name any five factors which determine choice of roof structure.
Date posted: January 1, 2018. Answers (1)
- Give five functional requirements of foundations(Solved)
Give five functional requirements of foundations.
Date posted: January 1, 2018. Answers (1)
- Explain how to test for silt content in sand.(Solved)
Explain how to test for silt content in sand.
Date posted: January 1, 2018. Answers (1)