CLOSED LOOP CONTROL OF DC DRIVES. Controller Requirements Fast tracking capability Less steady...
-
Upload
bruno-owens -
Category
Documents
-
view
219 -
download
1
Transcript of CLOSED LOOP CONTROL OF DC DRIVES. Controller Requirements Fast tracking capability Less steady...
![Page 1: CLOSED LOOP CONTROL OF DC DRIVES. Controller Requirements Fast tracking capability Less steady state error Robust to load disturbance during steady.](https://reader036.fdocuments.in/reader036/viewer/2022062518/56649f395503460f94c55ed0/html5/thumbnails/1.jpg)
CLOSED LOOP CONTROL OF DC DRIVES
![Page 2: CLOSED LOOP CONTROL OF DC DRIVES. Controller Requirements Fast tracking capability Less steady state error Robust to load disturbance during steady.](https://reader036.fdocuments.in/reader036/viewer/2022062518/56649f395503460f94c55ed0/html5/thumbnails/2.jpg)
CLOSED LOOP CONTROL OF DC DRIVES
![Page 3: CLOSED LOOP CONTROL OF DC DRIVES. Controller Requirements Fast tracking capability Less steady state error Robust to load disturbance during steady.](https://reader036.fdocuments.in/reader036/viewer/2022062518/56649f395503460f94c55ed0/html5/thumbnails/3.jpg)
Controller Requirements
Fast tracking capability
Less steady state error
Robust to load disturbance during steady state and
transient conditions.
![Page 4: CLOSED LOOP CONTROL OF DC DRIVES. Controller Requirements Fast tracking capability Less steady state error Robust to load disturbance during steady.](https://reader036.fdocuments.in/reader036/viewer/2022062518/56649f395503460f94c55ed0/html5/thumbnails/4.jpg)
• Methods of speed control in DC drives
![Page 5: CLOSED LOOP CONTROL OF DC DRIVES. Controller Requirements Fast tracking capability Less steady state error Robust to load disturbance during steady.](https://reader036.fdocuments.in/reader036/viewer/2022062518/56649f395503460f94c55ed0/html5/thumbnails/5.jpg)
DC Motor Speed Control
Torque
Speed
MaximumTorque
By Changing Ra
Ra increasing
• Power loss in Ra• Does not maintain maximum torque capability• Poor speed regulation
![Page 6: CLOSED LOOP CONTROL OF DC DRIVES. Controller Requirements Fast tracking capability Less steady state error Robust to load disturbance during steady.](https://reader036.fdocuments.in/reader036/viewer/2022062518/56649f395503460f94c55ed0/html5/thumbnails/6.jpg)
DC Motor Speed Control
Torque
Speed
MaximumTorque
Flux Decreasing
Trated
• Slow transient response• Does not maintain maximum torque capability
By Decreasing Flux
![Page 7: CLOSED LOOP CONTROL OF DC DRIVES. Controller Requirements Fast tracking capability Less steady state error Robust to load disturbance during steady.](https://reader036.fdocuments.in/reader036/viewer/2022062518/56649f395503460f94c55ed0/html5/thumbnails/7.jpg)
DC Motor Speed Control
Torque
Speed
MaximumTorque
By Changing Armature voltage
Trated
Va increasing
• good speed regulation• maintain maximum torque capability
![Page 8: CLOSED LOOP CONTROL OF DC DRIVES. Controller Requirements Fast tracking capability Less steady state error Robust to load disturbance during steady.](https://reader036.fdocuments.in/reader036/viewer/2022062518/56649f395503460f94c55ed0/html5/thumbnails/8.jpg)
Speed control of DC Motors
Below base speed: Armature voltage control (retain maximum torque capability)
Above base speed: Field weakening (i.e. flux reduced) (Trading-off torque capability for speed)
Torque
speed
Line of MaximumTorque Limitation
Armature voltage controlField flux control
base
![Page 9: CLOSED LOOP CONTROL OF DC DRIVES. Controller Requirements Fast tracking capability Less steady state error Robust to load disturbance during steady.](https://reader036.fdocuments.in/reader036/viewer/2022062518/56649f395503460f94c55ed0/html5/thumbnails/9.jpg)
Armature and field control
![Page 10: CLOSED LOOP CONTROL OF DC DRIVES. Controller Requirements Fast tracking capability Less steady state error Robust to load disturbance during steady.](https://reader036.fdocuments.in/reader036/viewer/2022062518/56649f395503460f94c55ed0/html5/thumbnails/10.jpg)
In practice, for speeds less than the base speed (rated), the armature current and field currents are maintained at fixed values (hence constant torque operation), and the armature voltage controls the speed.
For speeds higher than the base speed, the armature voltage is maintained at rated value, and the field current is varied to control the speed. However, this way the power developed Pd is maintained constant. This mode is referred to as “field weakening” operation.
![Page 11: CLOSED LOOP CONTROL OF DC DRIVES. Controller Requirements Fast tracking capability Less steady state error Robust to load disturbance during steady.](https://reader036.fdocuments.in/reader036/viewer/2022062518/56649f395503460f94c55ed0/html5/thumbnails/11.jpg)
![Page 12: CLOSED LOOP CONTROL OF DC DRIVES. Controller Requirements Fast tracking capability Less steady state error Robust to load disturbance during steady.](https://reader036.fdocuments.in/reader036/viewer/2022062518/56649f395503460f94c55ed0/html5/thumbnails/12.jpg)
![Page 13: CLOSED LOOP CONTROL OF DC DRIVES. Controller Requirements Fast tracking capability Less steady state error Robust to load disturbance during steady.](https://reader036.fdocuments.in/reader036/viewer/2022062518/56649f395503460f94c55ed0/html5/thumbnails/13.jpg)
![Page 14: CLOSED LOOP CONTROL OF DC DRIVES. Controller Requirements Fast tracking capability Less steady state error Robust to load disturbance during steady.](https://reader036.fdocuments.in/reader036/viewer/2022062518/56649f395503460f94c55ed0/html5/thumbnails/14.jpg)
![Page 15: CLOSED LOOP CONTROL OF DC DRIVES. Controller Requirements Fast tracking capability Less steady state error Robust to load disturbance during steady.](https://reader036.fdocuments.in/reader036/viewer/2022062518/56649f395503460f94c55ed0/html5/thumbnails/15.jpg)
![Page 16: CLOSED LOOP CONTROL OF DC DRIVES. Controller Requirements Fast tracking capability Less steady state error Robust to load disturbance during steady.](https://reader036.fdocuments.in/reader036/viewer/2022062518/56649f395503460f94c55ed0/html5/thumbnails/16.jpg)
![Page 17: CLOSED LOOP CONTROL OF DC DRIVES. Controller Requirements Fast tracking capability Less steady state error Robust to load disturbance during steady.](https://reader036.fdocuments.in/reader036/viewer/2022062518/56649f395503460f94c55ed0/html5/thumbnails/17.jpg)
Block diagram of closed loop control
![Page 18: CLOSED LOOP CONTROL OF DC DRIVES. Controller Requirements Fast tracking capability Less steady state error Robust to load disturbance during steady.](https://reader036.fdocuments.in/reader036/viewer/2022062518/56649f395503460f94c55ed0/html5/thumbnails/18.jpg)
Controller Design Procedure
![Page 19: CLOSED LOOP CONTROL OF DC DRIVES. Controller Requirements Fast tracking capability Less steady state error Robust to load disturbance during steady.](https://reader036.fdocuments.in/reader036/viewer/2022062518/56649f395503460f94c55ed0/html5/thumbnails/19.jpg)
Controller Design Procedure- Contd.
![Page 20: CLOSED LOOP CONTROL OF DC DRIVES. Controller Requirements Fast tracking capability Less steady state error Robust to load disturbance during steady.](https://reader036.fdocuments.in/reader036/viewer/2022062518/56649f395503460f94c55ed0/html5/thumbnails/20.jpg)
Controller Design Procedure- Contd.
![Page 21: CLOSED LOOP CONTROL OF DC DRIVES. Controller Requirements Fast tracking capability Less steady state error Robust to load disturbance during steady.](https://reader036.fdocuments.in/reader036/viewer/2022062518/56649f395503460f94c55ed0/html5/thumbnails/21.jpg)
Transfer Function of Motor
![Page 22: CLOSED LOOP CONTROL OF DC DRIVES. Controller Requirements Fast tracking capability Less steady state error Robust to load disturbance during steady.](https://reader036.fdocuments.in/reader036/viewer/2022062518/56649f395503460f94c55ed0/html5/thumbnails/22.jpg)
![Page 23: CLOSED LOOP CONTROL OF DC DRIVES. Controller Requirements Fast tracking capability Less steady state error Robust to load disturbance during steady.](https://reader036.fdocuments.in/reader036/viewer/2022062518/56649f395503460f94c55ed0/html5/thumbnails/23.jpg)
• Transfer Function of Converters
![Page 24: CLOSED LOOP CONTROL OF DC DRIVES. Controller Requirements Fast tracking capability Less steady state error Robust to load disturbance during steady.](https://reader036.fdocuments.in/reader036/viewer/2022062518/56649f395503460f94c55ed0/html5/thumbnails/24.jpg)
CURRENT CONTROL FOR DC DRIVES
To derive transfer function of converter, control techniques should be explained
![Page 25: CLOSED LOOP CONTROL OF DC DRIVES. Controller Requirements Fast tracking capability Less steady state error Robust to load disturbance during steady.](https://reader036.fdocuments.in/reader036/viewer/2022062518/56649f395503460f94c55ed0/html5/thumbnails/25.jpg)
Current Control for Chopper
![Page 26: CLOSED LOOP CONTROL OF DC DRIVES. Controller Requirements Fast tracking capability Less steady state error Robust to load disturbance during steady.](https://reader036.fdocuments.in/reader036/viewer/2022062518/56649f395503460f94c55ed0/html5/thumbnails/26.jpg)
![Page 27: CLOSED LOOP CONTROL OF DC DRIVES. Controller Requirements Fast tracking capability Less steady state error Robust to load disturbance during steady.](https://reader036.fdocuments.in/reader036/viewer/2022062518/56649f395503460f94c55ed0/html5/thumbnails/27.jpg)
![Page 28: CLOSED LOOP CONTROL OF DC DRIVES. Controller Requirements Fast tracking capability Less steady state error Robust to load disturbance during steady.](https://reader036.fdocuments.in/reader036/viewer/2022062518/56649f395503460f94c55ed0/html5/thumbnails/28.jpg)
PWM Controller
![Page 29: CLOSED LOOP CONTROL OF DC DRIVES. Controller Requirements Fast tracking capability Less steady state error Robust to load disturbance during steady.](https://reader036.fdocuments.in/reader036/viewer/2022062518/56649f395503460f94c55ed0/html5/thumbnails/29.jpg)
Hysteresis Controller
![Page 30: CLOSED LOOP CONTROL OF DC DRIVES. Controller Requirements Fast tracking capability Less steady state error Robust to load disturbance during steady.](https://reader036.fdocuments.in/reader036/viewer/2022062518/56649f395503460f94c55ed0/html5/thumbnails/30.jpg)
![Page 31: CLOSED LOOP CONTROL OF DC DRIVES. Controller Requirements Fast tracking capability Less steady state error Robust to load disturbance during steady.](https://reader036.fdocuments.in/reader036/viewer/2022062518/56649f395503460f94c55ed0/html5/thumbnails/31.jpg)
Comparison
![Page 32: CLOSED LOOP CONTROL OF DC DRIVES. Controller Requirements Fast tracking capability Less steady state error Robust to load disturbance during steady.](https://reader036.fdocuments.in/reader036/viewer/2022062518/56649f395503460f94c55ed0/html5/thumbnails/32.jpg)
Transfer function of chopper drive
![Page 33: CLOSED LOOP CONTROL OF DC DRIVES. Controller Requirements Fast tracking capability Less steady state error Robust to load disturbance during steady.](https://reader036.fdocuments.in/reader036/viewer/2022062518/56649f395503460f94c55ed0/html5/thumbnails/33.jpg)
![Page 34: CLOSED LOOP CONTROL OF DC DRIVES. Controller Requirements Fast tracking capability Less steady state error Robust to load disturbance during steady.](https://reader036.fdocuments.in/reader036/viewer/2022062518/56649f395503460f94c55ed0/html5/thumbnails/34.jpg)
![Page 35: CLOSED LOOP CONTROL OF DC DRIVES. Controller Requirements Fast tracking capability Less steady state error Robust to load disturbance during steady.](https://reader036.fdocuments.in/reader036/viewer/2022062518/56649f395503460f94c55ed0/html5/thumbnails/35.jpg)
![Page 36: CLOSED LOOP CONTROL OF DC DRIVES. Controller Requirements Fast tracking capability Less steady state error Robust to load disturbance during steady.](https://reader036.fdocuments.in/reader036/viewer/2022062518/56649f395503460f94c55ed0/html5/thumbnails/36.jpg)
![Page 37: CLOSED LOOP CONTROL OF DC DRIVES. Controller Requirements Fast tracking capability Less steady state error Robust to load disturbance during steady.](https://reader036.fdocuments.in/reader036/viewer/2022062518/56649f395503460f94c55ed0/html5/thumbnails/37.jpg)
Three-phase Fully controlled Rectifier- transfer function
![Page 38: CLOSED LOOP CONTROL OF DC DRIVES. Controller Requirements Fast tracking capability Less steady state error Robust to load disturbance during steady.](https://reader036.fdocuments.in/reader036/viewer/2022062518/56649f395503460f94c55ed0/html5/thumbnails/38.jpg)
![Page 39: CLOSED LOOP CONTROL OF DC DRIVES. Controller Requirements Fast tracking capability Less steady state error Robust to load disturbance during steady.](https://reader036.fdocuments.in/reader036/viewer/2022062518/56649f395503460f94c55ed0/html5/thumbnails/39.jpg)
Introduction to PID Controllers for deriving the transfer function of current&
speed controllers
![Page 40: CLOSED LOOP CONTROL OF DC DRIVES. Controller Requirements Fast tracking capability Less steady state error Robust to load disturbance during steady.](https://reader036.fdocuments.in/reader036/viewer/2022062518/56649f395503460f94c55ed0/html5/thumbnails/40.jpg)
![Page 41: CLOSED LOOP CONTROL OF DC DRIVES. Controller Requirements Fast tracking capability Less steady state error Robust to load disturbance during steady.](https://reader036.fdocuments.in/reader036/viewer/2022062518/56649f395503460f94c55ed0/html5/thumbnails/41.jpg)
![Page 42: CLOSED LOOP CONTROL OF DC DRIVES. Controller Requirements Fast tracking capability Less steady state error Robust to load disturbance during steady.](https://reader036.fdocuments.in/reader036/viewer/2022062518/56649f395503460f94c55ed0/html5/thumbnails/42.jpg)
![Page 43: CLOSED LOOP CONTROL OF DC DRIVES. Controller Requirements Fast tracking capability Less steady state error Robust to load disturbance during steady.](https://reader036.fdocuments.in/reader036/viewer/2022062518/56649f395503460f94c55ed0/html5/thumbnails/43.jpg)
![Page 44: CLOSED LOOP CONTROL OF DC DRIVES. Controller Requirements Fast tracking capability Less steady state error Robust to load disturbance during steady.](https://reader036.fdocuments.in/reader036/viewer/2022062518/56649f395503460f94c55ed0/html5/thumbnails/44.jpg)
![Page 45: CLOSED LOOP CONTROL OF DC DRIVES. Controller Requirements Fast tracking capability Less steady state error Robust to load disturbance during steady.](https://reader036.fdocuments.in/reader036/viewer/2022062518/56649f395503460f94c55ed0/html5/thumbnails/45.jpg)
About Kp value
![Page 46: CLOSED LOOP CONTROL OF DC DRIVES. Controller Requirements Fast tracking capability Less steady state error Robust to load disturbance during steady.](https://reader036.fdocuments.in/reader036/viewer/2022062518/56649f395503460f94c55ed0/html5/thumbnails/46.jpg)
About Ki value
![Page 47: CLOSED LOOP CONTROL OF DC DRIVES. Controller Requirements Fast tracking capability Less steady state error Robust to load disturbance during steady.](https://reader036.fdocuments.in/reader036/viewer/2022062518/56649f395503460f94c55ed0/html5/thumbnails/47.jpg)
About Kd value
![Page 48: CLOSED LOOP CONTROL OF DC DRIVES. Controller Requirements Fast tracking capability Less steady state error Robust to load disturbance during steady.](https://reader036.fdocuments.in/reader036/viewer/2022062518/56649f395503460f94c55ed0/html5/thumbnails/48.jpg)
Overall block diagram
![Page 49: CLOSED LOOP CONTROL OF DC DRIVES. Controller Requirements Fast tracking capability Less steady state error Robust to load disturbance during steady.](https://reader036.fdocuments.in/reader036/viewer/2022062518/56649f395503460f94c55ed0/html5/thumbnails/49.jpg)
![Page 50: CLOSED LOOP CONTROL OF DC DRIVES. Controller Requirements Fast tracking capability Less steady state error Robust to load disturbance during steady.](https://reader036.fdocuments.in/reader036/viewer/2022062518/56649f395503460f94c55ed0/html5/thumbnails/50.jpg)
![Page 51: CLOSED LOOP CONTROL OF DC DRIVES. Controller Requirements Fast tracking capability Less steady state error Robust to load disturbance during steady.](https://reader036.fdocuments.in/reader036/viewer/2022062518/56649f395503460f94c55ed0/html5/thumbnails/51.jpg)
![Page 52: CLOSED LOOP CONTROL OF DC DRIVES. Controller Requirements Fast tracking capability Less steady state error Robust to load disturbance during steady.](https://reader036.fdocuments.in/reader036/viewer/2022062518/56649f395503460f94c55ed0/html5/thumbnails/52.jpg)
![Page 53: CLOSED LOOP CONTROL OF DC DRIVES. Controller Requirements Fast tracking capability Less steady state error Robust to load disturbance during steady.](https://reader036.fdocuments.in/reader036/viewer/2022062518/56649f395503460f94c55ed0/html5/thumbnails/53.jpg)
![Page 54: CLOSED LOOP CONTROL OF DC DRIVES. Controller Requirements Fast tracking capability Less steady state error Robust to load disturbance during steady.](https://reader036.fdocuments.in/reader036/viewer/2022062518/56649f395503460f94c55ed0/html5/thumbnails/54.jpg)
![Page 55: CLOSED LOOP CONTROL OF DC DRIVES. Controller Requirements Fast tracking capability Less steady state error Robust to load disturbance during steady.](https://reader036.fdocuments.in/reader036/viewer/2022062518/56649f395503460f94c55ed0/html5/thumbnails/55.jpg)
![Page 56: CLOSED LOOP CONTROL OF DC DRIVES. Controller Requirements Fast tracking capability Less steady state error Robust to load disturbance during steady.](https://reader036.fdocuments.in/reader036/viewer/2022062518/56649f395503460f94c55ed0/html5/thumbnails/56.jpg)
![Page 57: CLOSED LOOP CONTROL OF DC DRIVES. Controller Requirements Fast tracking capability Less steady state error Robust to load disturbance during steady.](https://reader036.fdocuments.in/reader036/viewer/2022062518/56649f395503460f94c55ed0/html5/thumbnails/57.jpg)
![Page 58: CLOSED LOOP CONTROL OF DC DRIVES. Controller Requirements Fast tracking capability Less steady state error Robust to load disturbance during steady.](https://reader036.fdocuments.in/reader036/viewer/2022062518/56649f395503460f94c55ed0/html5/thumbnails/58.jpg)
![Page 59: CLOSED LOOP CONTROL OF DC DRIVES. Controller Requirements Fast tracking capability Less steady state error Robust to load disturbance during steady.](https://reader036.fdocuments.in/reader036/viewer/2022062518/56649f395503460f94c55ed0/html5/thumbnails/59.jpg)
![Page 60: CLOSED LOOP CONTROL OF DC DRIVES. Controller Requirements Fast tracking capability Less steady state error Robust to load disturbance during steady.](https://reader036.fdocuments.in/reader036/viewer/2022062518/56649f395503460f94c55ed0/html5/thumbnails/60.jpg)
![Page 61: CLOSED LOOP CONTROL OF DC DRIVES. Controller Requirements Fast tracking capability Less steady state error Robust to load disturbance during steady.](https://reader036.fdocuments.in/reader036/viewer/2022062518/56649f395503460f94c55ed0/html5/thumbnails/61.jpg)
![Page 62: CLOSED LOOP CONTROL OF DC DRIVES. Controller Requirements Fast tracking capability Less steady state error Robust to load disturbance during steady.](https://reader036.fdocuments.in/reader036/viewer/2022062518/56649f395503460f94c55ed0/html5/thumbnails/62.jpg)
Simulation
![Page 63: CLOSED LOOP CONTROL OF DC DRIVES. Controller Requirements Fast tracking capability Less steady state error Robust to load disturbance during steady.](https://reader036.fdocuments.in/reader036/viewer/2022062518/56649f395503460f94c55ed0/html5/thumbnails/63.jpg)
![Page 64: CLOSED LOOP CONTROL OF DC DRIVES. Controller Requirements Fast tracking capability Less steady state error Robust to load disturbance during steady.](https://reader036.fdocuments.in/reader036/viewer/2022062518/56649f395503460f94c55ed0/html5/thumbnails/64.jpg)
![Page 65: CLOSED LOOP CONTROL OF DC DRIVES. Controller Requirements Fast tracking capability Less steady state error Robust to load disturbance during steady.](https://reader036.fdocuments.in/reader036/viewer/2022062518/56649f395503460f94c55ed0/html5/thumbnails/65.jpg)
![Page 66: CLOSED LOOP CONTROL OF DC DRIVES. Controller Requirements Fast tracking capability Less steady state error Robust to load disturbance during steady.](https://reader036.fdocuments.in/reader036/viewer/2022062518/56649f395503460f94c55ed0/html5/thumbnails/66.jpg)
![Page 67: CLOSED LOOP CONTROL OF DC DRIVES. Controller Requirements Fast tracking capability Less steady state error Robust to load disturbance during steady.](https://reader036.fdocuments.in/reader036/viewer/2022062518/56649f395503460f94c55ed0/html5/thumbnails/67.jpg)
![Page 68: CLOSED LOOP CONTROL OF DC DRIVES. Controller Requirements Fast tracking capability Less steady state error Robust to load disturbance during steady.](https://reader036.fdocuments.in/reader036/viewer/2022062518/56649f395503460f94c55ed0/html5/thumbnails/68.jpg)
![Page 69: CLOSED LOOP CONTROL OF DC DRIVES. Controller Requirements Fast tracking capability Less steady state error Robust to load disturbance during steady.](https://reader036.fdocuments.in/reader036/viewer/2022062518/56649f395503460f94c55ed0/html5/thumbnails/69.jpg)