The next experiment is speed analysis for rotator and
actuator. Sun movement is very slow just 150
per hour and
7.81o
per month; hence, the solar tracking system does not
require a fast rotator and actuator. Rotator is used in this
system can operate from 2 – 6 volt, whereas the voltage that
operated in the rotator is only 3 volt, therefore resulting of the
motor rotation is approximately 7.6 rpm and 0.34 ampere.
Actuator are used in this system is to drive the solar panels in
elevation direction (east and west). Resulting of the actuator
movement does not rotation but translation, which it can be
move up to 39 cm and the maximum speed as 0.72 cm s-1.
The voltage of fifth photodiode used as a reference, when
the sunlight angle among solar panels is 0o
so that the voltage
output is around 2.8 volt. Smaller voltage sensed by the fifth
photodiode more time required by the rotator and actuator to
drive the system towards set point as shown in figure 10.