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This is why very large generators and small energy plants typically have large cooling towers subsequent to them. For all different frequent functions, each residential and industrial, a normal radiator and fan is mounted on the generator and works as the primary cooling system. (i) By induction – These are often known as brushless alternators and are often utilized in giant generators. (iii) By using an exciter – An exciter is a small source of direct current (DC) that energizes the rotor via an meeting of conducting slip rings and brushes. An induction generator