DC-bus operation Introduction Advantages of a drive system 7 7.1 7.1.3 7.1.3 Advantages of a drive system When several controllers are operated in a DC-bus connection (DC bus), this offers the following advantages: ƒ Energy exchange between controllers in generator-mode (braking) and motor-mode operation. ƒ The energy exchange reduces the supply power from the AC mains. ƒ DC-supply modules or feeding single-axis controllers can be dimensioned with a lower rated power. ƒ The energy exchange reduces the braking losses in generator-mode operation. Advantages for installation: ƒ Only one AC-mains connection (e.g. at the DC-supply module). ƒ Reduced wiring costs.
7.1-3 EDS94SPP101 EN 3.1-04/2007