How Boost Converter is Helpful in Traffic Light with case study...

1. APPLICATION OF BOOST
CONVERTER FOR SOLAR
POWERED TRAFFIC LIGHT
PREPRARED BY:
Mayursinh Rathod

2. INTRODUCTION
 Solar panel is used to generate power from direct sun light
and utilized it to traffic control lights.
 Proposed model shows application of boost converter which
helps to charge battery from solar panel.
 During day time solar panel charge the battery as well as fed
load and during night time battery will fed load.
 LDR is used to control battery use.

3. CIRCUIT DIAGRAM

4. COMPONENTS
 Solar panel having 10W and 16.8V rating to be used.
 But sun light is not constant so we need to boost it, so boost
converter is to be used for step up the voltage level.
 Intensity of light is not constant so first simulation of project
is required.
 Some disturbance is given to input of boost converter from
solar panel for consistency of circuit.
 But output waveforms are unstable.
 To over come this problem closed loop boost converter is
used.

5. COMPONENTS
 Duty cycle is 14%.
 Minimum inductance and capacitance are calculated 73.46mH
and 102.4µF respectively.
 Switching frequency of boost converter is 31250 Hz

6. WORKING
 Output of closed loop boost converter is constant during
disturbance and suitable for battery charging.
 During day time battery is charged with help of closed loop
boost converter and solar panel also fed LED load.
 During night time solar panel and closed loop boost
converter is isolated and battery is fed load.

7. CONCLUSION
 Two solar panels are used, one for battery charging and other
one for fed LED load.
 For better result close path is required, so closed loop boost
converter is used in place of open loop boost converter.