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DC MOTORS • Presenter… -Sumeet Patel (99) TOPICS  TO  DISCUSS  Introduction to DC MOTORS  Principle  Construction  Working Applications DC MOTOR • A DC motor or Direct Current Motor converts electrical energy into mechanical energy • A direct current (DC) motor is a fairly simple electric motor that uses electricity and a magnetic field to produce torque, which turns the rotor and hence give mechanical work PRINCIPLE OF DC MOTORS • In any electric motor, operation is based on simple electromagnetism • When a current-carrying conductor is placed in an external magnetic field, it will experience a force call Lorentz force • Due to this force torque is produced which rotates the rotor of motor and hence a motor runs CONSTRUCTION  • DC motor consist of main component… permanent magnets field winding • Field winding wound on steel core , steel core mounted with axial can rotate freely • Field windings when given DC supply, magnetic field is produced • Armature winding when connected to DC source, shaft connected to it rotates WORKING OF DC MOTORS electricity flow from brush through commutator and into the field winding Field winding generates a magnetic field, under the effect of magnetic fields field winding will spin Applications  DC motor can be used in portable electric fan, Hand drill, etc… BIBLIOGRAPHY www.google.com en.wikipedia.org Electrical technology – B.L Theraja – A.K Theraja THANK YOU ... PRINCIPLE OF DC MOTORS • In any electric motor, operation is based on simple electromagnetism • When a current-carrying conductor is placed in an external magnetic field, it will experience a force call Lorentz