Industrial Drives and Control

Introduction and Dynamics of Electrical Drives:

1. Electrical Drives and their Advantages,
2. parts of Electrical Drives,
3. D.C. and A.C. Drives,
4. Torque equations,
5. Multi-quadrant Operation,
6. Load torques and their types,
7. Steady state stability,
8. load equalization,
9. Types of motors and their enclosures,
10. thermal model of motor for heating and cooling,
11. classes of motor duty,
12. Rating of Motor.

DC motor characteristics:

1. Review of emf and torque equations of DC machine,
2. review of torque-speed characteristics of dc motor,
3. change in torque-speed curve with armature voltage and field flux,
4. load torque-speed characteristics,
5. operating point,
6. armature voltage control for varying motor speed,
7. flux weakening for high speed operation.

Chopper fed DC drive:

1. Review of dc chopper and duty ratio control,
2. chopper fed dc motor for speed control,
3. steady state operation of a chopper fed drive,
4. armature current waveform and ripple,
5. calculation of losses in dc motor and chopper,
6. efficiency of dc drive,
7. smooth starting, Closed loop operation ( Block Diagram Only).

Multi-quadrant DC drive:

1. Review of motoring and generating modes operation of a separately excited dc machine,
2. four quadrant operation of dc machine;
3. single-quadrant,
4. two-quadrant and four-quadrant choppers;
5. steady-state operation of multi-quadrant chopper fed dc drive,
6. regenerative braking.