Presented by, KAVYASHREE. S DC GENERATOR Presented by, KAVYASHREE. S

INDEX INTRODUCTION TO DC GENERATOR. WORKING PRINCIPLE OF DC GENERATOR. PARTS OF DC GENERATOR. CLASSIFICATION OF DC GENERATOR. APPLICATION OF DC GENERATOR. CONSTRUCTION OF DC GENERATOR.

INTRODUCTION TO DC GENERATOR An dc generator is a machine which converts mechanical energy or power into electrical energy.

WORKING PRINCIPLE It is based on the principle of production of dynamically induced e.m.f. (electro motive force). Whenever a conductor cuts magnetic flux, dynamically induced e.m.f is prodused in it according to Faraday’s Laws of Electro magnatic Induction. This emf causes a current to flow if the conductor circuit is closed.

Construction

CONSTRUCTION A single turn rectangular copper coil abcd moving about its own axis in a magnetic field provided by either permanent magnets or electro magnets. The two ends of the coil are joined to two split rings which are insulated from each other and from the central shaft.Two collecting brushes press against the slip rings.

PARTS OF DC GENERATOR Magnetic frame or yoke Pole core and pole shoes Pole coils and field coils Armature winding Commutator Brushes and bearings Shaft

CLASSIFICATION OF DC GENERATOR SEPERATELY EXCITED SELF EXCITED SHUNT WOUND SERIES WOUND COMPOUND WOUND LONG SHUNT SHORT SHUNT DC GENERATORS

Application of separately excited generator Used as Electroplating and as booster. Used with field regulators Used as power suppliers on big turbo alternator Used as exciters APPLICATION OF SHUNT GENERATOR Used for battery charging

APPLICATION OF SERIES GENERATOR Used for lightening Used as constant current generators Used as booster APPLICATION OF COMPOUND GENERATOR Used as compensator Used for ordinary lightning and power purposes

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