1. Design of single phase
switched power supply for
testing the performance of
energy saving lamps.
By:
Mohammed Hashemeh & Abdelrahman Bushnaq
& Ahmad Abu-Baker
Supervised by
Dr. Jamal Yousef Thalji

2. What is the problem ?
• Study the impact of frequent electricity interruption
on the residential loads starting with conventional
energy saving lamps.
• The main idea is to conclude whether if the
interruption of power supply for very short time
frequently, will effects dramatically on conventional
energy saving lamps and other types of lamps.

3. • Does lifespan of the energy saving lamps depends on the
number of interruption times or on the operating hours?
• How lifespan of lamps will be affected by the frequent power
supply interruption?
• Does the interruption will effect on the normal operation of
lamps (light flickering)?
• If there is deference response between conventional energy
saving lamps and other types of lamps like LED when frequent
interruption applied.
Project Motivation

4. Why lamps?
lamps
Light
flickering
light load
unexpansiveAvailability
Simple

5. Main constraints
• Build device frame by machines is unavailable in
universities laboratories and very expensive in
other laboratories.
• Test other types of load is costly.
Economic
• Generated heat from components can damage
components itself if it exceed rated temperature.
• Select a suitable switching device to do an
interruption starting from 1 to 20 ms.
Technical
• Dealing with 220 AC volts is dangerous.
• If lamp exploded, it will effect on surrounding area.Safety

6. • Main components:
- LCD.
- PIC16F877A.
- Sharp s101s05v SSR.
- Transformer.
- Buzzer.
- Photoresistor.
- Pushbuttons.
Design

7. Hardware design
• Block diagram:

8. Hardware design
Schematic diagram:

9. Hardware design
Schematic diagram:

10. Hardware design
Schematic diagram:

11. Software design
PIC flowchart:

12. Results
Typesoflampsbeen
tested:
Incandescent
(Philips brand).
CFL (Osram
brand).
LED

13. Results
Main
tests:
Flickering
test
Durability
test

14. Results
• Voltage cycle test:

15. • Flickering test:
- Find at what interruption period the lamps start to
flicker or their illumination start to decrease.
• Test configuration:
- 50 interruptions (switching off period).
- Viruses interruption periods starts from 1ms to 50 ms.
Results

16. • Flickering test:
Results

17. • Flickering test:
Results

18. • Flickering test:
Results

19. • Flickering test:
Results

20. • Durability test:
- Interpret the power supply frequently for long time.
• Test configuration:
- 10,000 interruptions.
- Switch on periods: 1, 5, and 10 seconds.
- Interruption (switch off) period 20 ms.
Results

21. Results
• Durability test:

22. • Does lifespan of the energy saving lamps depends on the
number of interruption times or on the operating hours?
• Does the interruption will effect on the normal operation of
lamps (light flickering)?
• If there is deference response between conventional energy
saving lamps and other types of lamps like LED when frequent
interruption applied.
Conclusion

23. future work
• Take more sample test.
• Test other types of loads.
• Improve hardware implementation.
• Increase both switching time and
interruption periods.

24. Thank you
We are welcome your comments and suggestions.