Patent ID: 8638055

Claim:
A power supply system of a transport system, the power supply system comprising: a direct-current intermediate circuit; a motor bridge connected to the direct-current intermediate circuit, the motor bridge being configured to supply power between the direct-current intermediate circuit and a motor configured to move a transport appliance; an energy storage device; a direct-current converter connected between the energy storage device and the direct-current intermediate circuit, the direct-current converter being configured to control a supply of power between the energy storage device and the direct-current intermediate circuit, and the direct-current converter including, an internal energy storage, a controllable solid-state switch configured to supply current from the energy storage device to the internal energy storage when closed, and to disconnect the energy storage device from the internal energy storage when opened, and wherein the direct current converter is configured to supply current from the internal energy storage to the direct-current intermediate circuit after the energy storage device is disconnected from the internal energy storage.