DESIGN, FABRICATION AND TESTING OF AN UPS USING PWM CONTROL A PROTOTYPE

The project describes an uninterruptible power system (UPS) with pulse width modulation (PWM) control. It focuses on AC to AC , AC to DC and DC to AC power UPS, which aim efficiently transform an AC to DC and also DC power source to a high voltage AC power source similar to that would be available at an electrical wall outlet . UPSs are used for many applications as in situations where low voltage AC and DC source such as batteries and also no power as interruption. The solar panels or fuel cells must be converted into AC power so that devices can run off of an AC power. This project focuses on AC to AC , AC to DC and DC to AC power UPS, which aim efficiently transform an AC to DC and also DC power source to a high voltage AC power source similar to that would be available at an electrical wall[3] outlet . UPSs are used for many applications as in situations where low voltage AC and DC source such as batteries and also no power as interruption. The solar panels or fuel cells must be converted into AC power so that devices can run off of an AC power. A UPS is a device that sits between the plug in the wall and load side. Basically it is like a surge protector with it's own temporarily power source. The advantage of an UPS is that the computer runs off the battery and as because the UPS is plugged in, it is always charging the battery and hence the computer will always get a constant flow of electricity