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1. Automation lecture5
BY: Mahmoud Hussein

2. Motor speed control
 Synchronous speed: magnetic field velocity inside motor

3. Motor speed control
 rotor speed: is the actual speed of motor

4. Motor speed control
 Pole change of induction motor lead to a limited speed as at a table shown:

5. Winding motor types
 Separate winding induction motor: if motor speed not duplicated
 Use table 2&10 poles or 4 &6 poles
 Dahlander Motor: if motor speed is duplicated
 Use table 2&10 poles or 4 &6 poles
 4 &8 poles or 2 &4 poles

6. Separate winding induction motor
 Power circuit for motor run with two speed

7. Separate winding induction motor
 Control circuit for motor run with two speed with two switches
 Control circuit for motor run with two speed with two switches and timer to make
motor stop then run with another speed

8. Dahlander Motor induction motor
 Power circuit for motor run with two speed

9. Separate winding induction motor
 Control circuit for motor run with two speed with two switches
 Control circuit for motor run with two speed with two switches and timer to make
motor stop then run with another speed

10. Motor has two directions and two speed

11. Motor has two directions and two speed

12. Examples
 Design a control circuit to run motor a separate winding with two switches that we
cannot run slow motion during fast motion

13. Examples
 Design a control circuit to run motor a separate winding with one switcheto start
and one switch to stop one and run another that we cannot run slow motion
during fast motion

14. Examples
‫قبل‬ ‫العالية‬ ‫السرعة‬ ‫تشغيل‬ ‫يمكنني‬ ‫ال‬ ‫بحيث‬ ‫سرعتين‬ ‫لمحرك‬ ‫التحكم‬ ‫دائرة‬ ‫صمم‬
‫السرعة‬ ‫تشغيل‬‫للسرعة‬ ‫للعودة‬ ‫الحاجة‬ ‫عند‬ ‫و‬ ‫محدد‬ ‫وقت‬ ‫المنخفضة‬‫مرة‬ ‫المنخضة‬‫ال‬ ‫اخري‬
‫االيقاف‬ ‫مفتاح‬ ‫علي‬ ‫بالضغط‬ ‫اال‬ ‫يستطيع‬

15. Cable diameter calculation
 Cable diameter= rated current /current density
 Current density=3A for 1mm2
 Cable factors must be considered
 Cable length lead to voltage drop must be calculated
 Temperature affect on cable diameter
 Isolation material

16. Carry out control panel
 Component.
 Revision to control and power circuits.
 Use omega bars and bars to improve wiring shape.
 Revision number of open and closed auxiliary points
 Connect circuit slowly to avoid a fault connection
 Test every branch in a circuit

17. Fault detection

18. Fault detection

19. Fault detection

20. Counter
 Is a device making counts
 Adjust number of counts
 Power supply to coil A1-A2
 Have a signal B2 when count number equal to number adjusted change your
contact.
 B3 for reset
 B1 to count with negative

21. projects

22. projects
 Start button run three conveyors.
 Sensor count 12 product then piston run
 System delay for two seconds then start count 12
 And again