Permanent magnet synchronous generator
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Permanent Magnet Synchronous Generator is a type of Synchronous Generator which its excitation field is a permanent magnet instead of a coil.
Synchronous Generators are the primary source of all electrical energy and commonly used to convert the mechanical power output of steam turbines, gas turbines, reciprocating engines, hydro turbines and wind turbines into electrical power for the grid. They are known as synchronous generators because they operate at synchronous speed. The speed of the rotor always matches supply frequency.
Advantages of synchronous generator
- They are more stable and secure during normal operation and they do not require an additional D.C supply for the excitation circuit.
- The permanent magnet synchronous generators avoid the use of slip rings, hence it is simpler and maintenance free.
- Higher power coefficient and efficiency.
- Synchronous generators are suitable for high capacities and asynchronous generators which consume more reactive power are suitable for smaller capacities.
- Voltage regulation is possible in synchronous generators where it is not possible in induction types.
- Condensers are not required for maintaining the power factor in Synchronous generators, as it is required in induction generators.
closed gap induction
