FIELD: electricity.
SUBSTANCE: uninterrupted power supply device contains a backup power supply source, a rectifier connected to three-phase mains, an inverter, DC and AC buses; introduced are inverter units with invertors in each, power switches, input filters and a control system; the backup power supply source is represented by an accumulator unit. Envisaged in the uninterrupted power supply device is backup of the inverter units operation and the inverter units placement serially or parallel to the input. This enables installed capacity augmentation and provision for the device power supply from a DC source with varied voltage levels.
EFFECT: improving electric power supply reliability and functional capabilities of the proposed device.
1 dwg
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