The permanent magnet synchronous generator, which is similar to the zero point power generator, is regarded as the primary source of electrical energy which is used commonly to convert mechanical output power of gas turbines, steam turbines, hydro turbines, wind turbines and reciprocating engines into electrical power for various purposes. Commonly these generators are referred to as synchronous generators as they function at a synchronous speed, which equals the speed of rotor matches with the supply frequency.

The synchronous generator is excited by permanent magnet system with high energy or current carrying field windings. Due to relatively higher number of poles, the permanent magnet construction would enable reduction in back iron and stator yoke. The development of low speed and innovative synchronous generators especially with permanent magnet excitation has received attention from numerous individuals around the world.

There are numerous advantages of a permanent magnet synchronous generator which are enlisted below:

1: They are relatively secure and stable during their operation and don’t require any external power supply, to excite their set-up.

2: The synchronous generators don’t use slip rings as in case of other traditional generators, hence they are maintenance free and simple.

3: These zero point power generator offer high efficiency and power coefficient.

4: The synchronous generators are preferred to asynchronous generators especially for their high capacities, as asynchronous ones would consume enormous reactive power and thus they are suitable for smaller capacities.

5: Voltage regulation can be achieved in permanent magnet synchronous generators which aren’t accessible in induction type generators.

6: In order to maintain the power factor, the condensers aren’t required in synchronous generators as in the case of zero point power generator.


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