Patent ID: 9525362
Filing Date: 2016-12-20
CPC Classification: H02J,H02M,Y02E

Claim Text:
1. An auxiliary power supply system connected to a primary power source for providing power to a grid and auxiliary equipment external to the grid, the auxiliary power supply system comprising: a converter connected to a primary power source and configured to receive current therefrom, to power the auxiliary equipment; an injection device configured to (i) circulate current via a circulation bus and (ii) inject an alternating voltage from an alternating voltage source to the circulation bus for supplying power to the auxiliary equipment in the event of power failure of the primary power source, and comprising a controllable electrical connector with a voltage source and including a first transformer connected between the voltage source and the second end of the circulation bus; a recovery device configured coupled to the circulation bus and configured to recover the alternating voltage supplied thereto; and a conversion device configured to convert the alternating voltage to a direct voltage for powering the auxiliary equipment, wherein the auxiliary power supply system is configured to only supply power to the auxiliary equipment.