UNINTERRUPTED POWER SUPPLY UNIT Russian patent published in 2023 - IPC H02M5/45 H02J9/06 

FIELD: electrical engineering and power industry.

SUBSTANCE: invention relates to electrical engineering and power industry and can be used in power supply systems of industrial enterprises, autonomous power supply systems, private households for uninterruptible AC voltage supply at non-rated input voltage or during its short-term absence. The effect is achieved by the proposed uninterruptible power supply containing an input rectifier, an output inverter, input and output passive filters, a bypass, and a battery pack. To regulate the DC voltage, a double active bridge is installed between the input rectifier and the output inverter, consisting of a high-frequency inverter, a rectifier and two high-frequency transformers located between them. One transformer has a ratio of 3:2 and is designed for mains operation, and the second transformer has a ratio of 10:1 and is designed for operation with a battery pack. The choice of the transformer is carried out by a two-position key, depending on where the load is powered from - the first transformer operates when powered from the mains, the second when working with a battery pack, thereby reducing the size of the device due to the rejection of the charger and inverter for batteries and provides additional reliability due to galvanic isolation.

EFFECT: improving protection against changes in the magnitude and shape of the input voltage, the formation of a sinusoidal output voltage of high quality when powered both from the mains and from the battery, integration into an intelligent power supply network with small dimensions of the device.

1 cl, 7 dwg