Synchronous Machines – Study Material

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Synchronous Machines – Study Material

The machines generating alternating emf from the mechanical input are called alternators or synchronous generators. They are also known as AC generators. All modern power stations consist of large capacity, three phase alternators connected in parallel to generate electrical power.

Synchronous Machines – Study Material

Synopsis

  • Synchronous Machines
  • Types of rotor
  • Synchronous Motors
  • Transducers
  • Classification of Transducers
  • Instrument Transformer

Synchronous Machines:

  • The machines generating alternating emf from the mechanical input are called alternators or synchronous generators.
  • They are also known as AC generators.
  • All modern power stations consist of large capacity, three phase alternators connected in parallel to generate electrical power.

Types of rotor:

  • Salient pole type
  • Smooth cylindrical type

Synchronous Motors:

  • Synchronous motor is similar in construction to the alternator. It has a stater which houses the three-phase winding and a rotor which consists of electromagnetic poles. The rotor can be either salient pole type or non salient poll type.

Transducers:

  • An electronic instrumentation system consists of a number of components to perform a measurement and record its results.

Classification of Transducers:

Classified on the basis of transducer form used,

  • as primary and secondary transducers.
  • as passive & active transducers.
  • as analog and digital transducers.
  • transducers and inverse transducers

Instrument Transformer:

  • In power systems, currents and voltages handled are very large and therefore direct measurements are not possible BS these currents and voltages are far too large for any meter of reasonable size and cost.
  • Hence these currents and voltages are stepped down with the help of instrument transformer so that they could be metered with instrument of moderate sizes.

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