The SIMOREC DC Master converters are well established on the market since 1997. As successor now comes the SINAMICS drive system which was introduced on the hannover fair in 2010. In addition to a needs-based energy supply, the system is also scalable in control electronics. More: http://www.automation.siemens.com/mcms/large-drives/en/converters/dc-converters/sinamics-dcm/Pages/sinamics-dcm.aspx