lect7 - Lecture 7 - EE743 Lecture 7 - EE743 Direct Current...

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Unformatted text preview: Lecture 7 - EE743 Lecture 7 - EE743 Direct Current (DC) Machines - Part I Professor: Ali Keyhani Professor: Ali Keyhani 2 ■ Schematic representation of a DC Machine DC Machines Stator Stator Rotor Rotor + V V f- I f I f I f N N Φ Φ S S 3 ■ The field winding is placed on the stator and supplied from a DC Source. DC Machines Rotor Rotor N N Φ Φ S S x x x x x x x x Armature Armature Winding Winding 4 ■ The current is induced in the Rotor Rotor Winding Winding ( i.e. the Armature Winding Armature Winding ) since it is placed in the field ( Flux Lines ) of the Field Winding. DC Machines Φ Φ 5 ■ The mmf mmf produced by the field winding field winding and the mmf mmf produced by the armature armature winding winding are at a right-angle with respect to each other. ■ The torque is produced due to the interaction of these two fields generating force on the rotor. DC Machines 6 ■ The force acting on the rotor, is expressed as DC Machines Field the to Due Armature the to Due B L I f × = l l f f f f = x f f l l 7...
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This note was uploaded on 07/17/2008 for the course ECE 743 taught by Professor Keyhani during the Spring '08 term at Ohio State.

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lect7 - Lecture 7 - EE743 Lecture 7 - EE743 Direct Current...

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