This project is to purpose 1 phase uninterruptible power supply. Which has rated 500 VA. By using Frequency divider technique to generate sine wave signal . The inverter use power transistor and principles of Modulation to generate output (AC) signal. This UPS has 2 mode of working, first in Normal Line MCS 51 will control signal sine to supply load. And the second in fail condition MCS 51 will control, Inverter by using backup battery to supply load
By
Thanatchai Muanjinda
Rerngrithi Ponchantuk
Awirutha Pewkhaw
