Patent ID: 8836251

Claim:
A drive system ( 100 ) with energy recovery for driving a machine, in particular for driving a crane, wherein the drive system ( 100 ) includes at least one fuel cell unit ( 20 ), at least one capacitive energy storage unit ( 50 ) and at least one drive motor ( 30 , 31 , 32 ), and wherein the fuel cell unit ( 20 ) and the energy storage unit ( 50 ) are connected in parallel and feed at least one drive motor ( 30 , 31 , 32 ), wherein the capacitive energy storage unit ( 50 ) is dimensioned such that the differential voltage occurring during operation between the fuel cell unit ( 20 ) and the capacitive energy storage unit ( 50 ) is minimized to such an extent that the current caused by the voltage within the parallel connection of fuel cell unit ( 20 ) and energy storage unit ( 50 ) does not exceed a defined safe limit value, wherein the fuel cell unit ( 20 ) and the energy storage unit ( 50 ) are directly coupled with each other and with the remaining drive components without DC/DC converter.