This paper presents a double conversion Uninterruptible Power Supply (UPS) system with input voltage equal to 110Vac/220Vac and 24Vdc battery-set. To attend these features, a four-port circuit based ...

We are very familiar with linear dc power supplies, which is used to convert 220v Ac into low voltage high ampere DC. In the same way, A high ampere battery or supply is required to step up voltage to ...