Various modes of operation of electric drive are presented.

1. Modes of Operation and
Closed Loop Control of Drives
Prof. Swapnil Gadgune
PVPIT, Budhgaon

2. Modes of Operation
• Any Electrical Operates in three Modes
a) Steady State
b) Acceleration including starting
c) Deceleration including stopping

3. Principle of Speed Control

4. Speed Transition Paths

5. Drive Classification
• According to the design, the drives can be classified into three types:
1. Individual motor drive
2. Group motor drive
3. Multi motor drive

6. Closed Loop Speed Control of Drives
• It is used to meet following requirements:
1. Protection
2. Enhancement of speed of response
3. To improve steady state accuracy

7. Current Limit Control

8. Closed Loop Torque Control

9. Closed Loop Speed Control

10. Phase Locked Loop

11. Closed Loop Speed Control using PLL

12. Closed Loop Position Control

13. Closed Loop Control of Multi Motor Drives

14. Speed Sensing
• Tachogenerators
• Opto Coupler

15. Current Sensing