UNINTERRUPTIBLE POWER SUPPLY Russian patent published in 2023 - IPC H02J9/06 

FIELD: electrical engineering.

SUBSTANCE: uninterruptible power supply refers to the field of AC uninterruptible power supply systems, in which an uninterruptible power supply (UPS) supplies power to AC consumers in the event of a power outage from the AC mains by converting DC electricity stored in a storage device (for example, in the storage battery), into AC energy. During normal operation of the AC mains, the UPS charges the battery and then maintains the required voltage on it by rectifying the voltage supplied from the mains. The technical result is obtained by using an uninterruptible power supply (UPS) containing a line contactor connected between the network and the load, designed to connect and disconnect the mains, an input filter connected to the load and the line contactor, made in the form of a line choke, a control system, a battery connected to the DC input of a reversible inverter, and characterized in that the inverter and the storage battery are a single-phase device consisting of at least two modules that are part of the arm, connected in series to each other, and a sensor connected in series with the modules is introduced into the arm current, the second end connected to the load, and the information output to the control system, and the voltage sensor connected in parallel to the load, the information output of which is connected to the control system, the control inputs and information outputs of the modules are connected through galvanically isolated inputs and outputs of additionally introduced intermediate control systems to digital inputs and outputs of the control system.

EFFECT: increasing the efficiency of the UPS due to the low harmonic distortion, reducing switching losses and reducing losses at a low load factor of the device; invention also makes it possible to use it without changes in single-phase and three-phase networks, connecting several devices in a star or delta connection, and to increase operating currents by connecting devices in parallel.

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