Types of Alternator Alternators or synchronous generators can be classified in may ways depending upon theirapplication and design.According to application these machines are classified as 1) Automotive type - used in modern automobile. 2) Diesel electric locomotive type - used in diesel electric multiple unit .3) Marine type - used in marine. 4) Brush less type - used inelectrical power generation plantas main source of power. 5) Radio alternators - used for low brand radio frequency transmission. These ac generators can be divided in many ways but we will discuss now two maintypesof alternator categorized according to their design. Theseare 1)Salient pole typeIt is used as low and medium speed alternator. It has a large number of projecting poles having their cores bolted or dovetailed onto a heavy magnetic wheel of cast iron or steel of good magnetic quality. Such generators are characterized by their large diameters and short axial lengths. These generator are look like big wheel. These are mainly used for low speed turbine such as inhydral power plant. 2)Smooth cylindrical typeIt is used for steam turbine driven alternator. The rotor of this generator rotates in very high speed. The rotor consists of a smooth solid forged steel cylinder having a number of slots milled out at intervals along the outer periphery for accommodation of field coils. These rotors are designed mostly for 2 pole or 4 pole turbo generator running at 36000 rpm or 1800 rpm respectively. ADMIN- PRIYANSHU CHANDEL...
Posted on: Fri, 07 Mar 2014 15:24:06 +0000
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