The Doctoral Thesis is devoted to improving energy efficiency by introducing DC-type electrical power supply solutions for industrial robot-based manufacturing applications. The discussed methods cover individual AC-type industrial robot unit modifications for DC bus energy exchange up to DC microgrid introduction for the large-scale manufacturing environment. Experimental results demonstrate significant potential for energy reuse in the range from 20 % for individual industrial robots to 9.5 % for small groups and 6.5 % overall reused energy potential in the DC microgrid setup.