Product Description:

The KDV 2.1-100-220-300-V1-220 supply module is produced by Bosch Rexroth Indramat within the KDV Supply Modules series. Designed for centralized DC bus architectures in Indramat drive systems, the unit converts three-phase line power into a regulated DC link that supports multiple servo drives. It also carries the control electronics that coordinate energy distribution and enable dynamic regeneration, making the module an essential power interface between the plant mains and the motion axes in industrial automation cells. This arrangement allows several connected axes to operate from a common power source rather than from separate conversion stages. It is well suited for automation systems where frequent acceleration and deceleration place changing demands on the shared DC bus.

On the input side, the module is intended for 3-phase industrial feeders at 220 VAC. This voltage is stepped through an internal rectifier and presented to downstream drives only after a Soft Start circuit has limited inrush current to protect upstream breakers. Under continuous operation, the DC bus can deliver a maximum of 100 A, ensuring ample current reserve during simultaneous axis acceleration. After conversion, the link potential is held at 300 VDC, a level selected to match the nominal voltage class of Indramat drive controllers so that energy exchange among axes remains stable and predictable. The common DC source supports coordinated drive operation and helps maintain consistent power delivery during changing load conditions.

Thermal control relies on a rear heatsink that transfers switching losses directly into the control-cabinet exhaust path, keeping semiconductor junctions below their rated temperature. Energy storage is implemented with plug-in capacitance modules that smooth the DC link and let the supply tolerate short input disturbances. Combined, these capacitors and the internal logic give the unit a power-failure hold-up capability, allowing drives to execute a controlled stop if mains power is interrupted. The overall conversion section is sized for 40 HP, which offers sufficient margin for medium-sized multiaxis machines such as pick-and-place gantries or packaging lines without exceeding cabinet space or cooling budgets. Smoother bus voltage also helps connected drives respond more evenly during rapid load changes. The stored energy supports continued control activity long enough for an orderly shutdown when incoming power drops out.