1. Speed Control of DC motors (DC Drives)

2. Dynamics of Motor Load Systems J moment of inertia kg-m2 instantaneous angular velocity rad/sec T developed torque of the motor N.m. The load torque. Viscous Friction torque. B Viscous Friction coefficient.

3. Steady State Stability

4. Four-quadrant operation.

7. DC Motors

8. Steady State Speed Torque Relations

9. Separately Excited DC Motor

10. Series DC Motor

11. Methods of Speed Control Armature Voltage Control Field Flux Control Armature Resistance Control

12. Armature Voltage Control 1.Controlled Rectfier 2. Chopper (DC-DC Converter) Field Flux Control

13. Separately Series

14. Torque & Power Limitations in Combined armature Voltage and Field Control

16. b.

19. Armature Resistance Control Separately or shunt field

20. Armature Resistance Control Series field