DC MotorsOBJECTIVESTERMINAL OBJECTIVE1.0 Given the type and application of a DC motor, DESCRIBE the operatingcharacteristics of that motor to include methods of speed variation, advantages ofeach type, and torque vs speed characteristics.ENABLING OBJECTIVES1.1 Using the right-hand rule for motors, DETERMINE the direction of the magnetic field,direction of current flow, or force on a conductor.1.2STATE the function of torque in a direct current motor and how it is developed.1.3DESCRIBE how Counterelectromotive Force (CEMF) is developed in a DC motor.1.4DESCRIBE the relationship between field current and magnetic field size in a DC motor.1.5STATE the function of the CEMF that is developed in a DC motor.1.6DESCRIBE how the speed of a DC motor is adjusted.1.7DESCRIBE the relationship between armature current and torque produced in a DCmotor.1.8DESCRIBE the differences in construction between a shunt-wound and a series-woundDC motor with respect to the relationship between the field and the armature windings.1.9DESCRIBE the construction of a compounded DC motor.1.10DESCRIBE the torque-vs-speed characteristics for a shunt-wound and a series-wound DCmotor.1.11EXPLAIN why starting resistors are necessary for large DC motors.1.12LIST the four nameplate ratings for a DC motor.Rev. 0 Page v ES-06

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