Hydrogen Cooling of Alternators

 Introduction

The alternator in the large power plant consists of conductor with high electrical current flowing through them, which generates large amount of heat. If this heat is not dissipate in the surrounding area, alternator winding can quickly degrade and eventually damaged. When selecting cooling gas of alternator, several points to be considered.

Compare Salient Pole Alternator and Cylindrical Pole Alternator

Salient pole alternator & Cylindrical pole alternator

Salient pole alternator  

• The salient poles are mounted on large circular steel frame which is fixed to the shaft of the alternator. 
• It is used for low speed alternator. 
• As the speed of the alternator is low, numbers of poles must be higher