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

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.

• 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

Why lamps?

lamps

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

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

Design

Hardware design

• Block diagram:

Hardware design Schematic diagram:

Hardware design Schematic diagram:

Hardware design Schematic diagram:

Software design PIC flowchart:

Results

Types of lamps been tested:

Incandescent (Philips brand).

CFL (Osram brand).

LED

Results

Main tests:

Flickering test

Durability test

Results

• Voltage cycle test:

• 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

• Flickering test:

Results

• Flickering test:

Results

• Flickering test:

Results

• Flickering test:

Results

• 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

Results

• Durability test:

• 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

future work

• Take more sample test.

• Test other types of loads.

• Improve hardware implementation.

• Increase both switching time and interruption periods.

Thank you

We are welcome your comments and suggestions.