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4. DC Machines
4.1 Construction
- Stator: Field poles with field winding (produces magnetic flux).
- Rotor (Armature): Winding placed in slots, commutator, brushes.
- Commutator converts AC induced in armature to DC externally.
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Electromechanical Energy Conversion: It begins with the fundamental principles of converting electrical energy into mechanical power (and vice-versa) using magnetic fields as a medium. If you're a student, check your college library
2.2 Lorentz Force Law
The force on a charge moving in a magnetic field underlies motor operation. For a conductor length ( l ) carrying current ( I ) in flux density ( B ):
( F = BIl ) (when perpendicular).