Managing Inrush Current using Hot Swap and OR-ing FET

Critical, high availability systems will always rely on redundant power for continuous operation when the default power fails or becomes unavailable. When the back-up system kicks in, there will be a huge inrush current depending on load. The consequences of inrush current can be reduction of output voltage, tripping of protective devices, damage to sensitive devices either on at the load or on the back-up system itself and eventually system failure. This dissertation studies the effects of inrush current on an already existing Redundant Power Distribution System (RPDS). A review of existing technique to control inrush current is presented. A new solution has been implemented on the Redundant Power Distribution System such that the functionality of overall system is preserved. Finally, performance of existing solution on RPDS and new solution are compared.