Online uninterruptible power supply that generates sine wave output using a single power supply with lighting function

摘要

Disclosed is a lighting equipment built-in on-line uninterruptible power system (UPS) Capable of supplying AC sinusoidal power from a single DC source by boosting up the DC voltage of its battery unit and inverting it to an AC sinusoidal output via a DC to AC inverter circuit according to pulse width modulation (PWM) signals successively delivered by a controller circuit during the utility power failure, and at the same time, starts the built-in lighting equipment to illuminate the surroundings. The AC output power is intensified and stabilized through series and parallel connections of the inner circuit components of the UPS.