Product Description:

The KDV 3.2-100-220-300-220 is a supply module produced by Bosch Rexroth Indramat for the KDV Supply Modules series. Installed at the front end of multi-axis drive assemblies, it converts a three-phase mains source into a stabilized DC link and auxiliary low-voltage rails that feed Indramat HDS, HVE, or similar servo inverters. By providing regenerative energy handling and internal bleeder circuitry, the unit supports controlled deceleration and consistent power quality for synchronous and induction motors used in automated machining centers, material handling lines, and packaging equipment.

It accepts an input of 3 × 220 VAC and rectifies it to a DC link held at 300 VDC, allowing the connected drives to operate without separate power supplies. Under continuous operation, the module can source 100 A to the DC bus, while momentary surges up to 160 A for 300 ms support acceleration peaks or simultaneous axis starts. Power inflow to the bus reaches 48 kW, so upstream circuit protection must match this demand. For auxiliary electronics and sensors, the module delivers a regulated logic rail that can supply 11.5 A at 24 VDC. These limits set the electrical range that the downstream servo amplifiers and field devices must respect.

During braking or overhauling load events, kinetic energy is returned to the DC link, and the supply can absorb up to 100 kWs of returned energy. If the bus voltage rises further, the integrated bleeder resistor dissipates as much as 40 kW to protect drive electronics. Internal fans powered by a dedicated supply of 1000 VA move air through the chassis, limiting temperature rise. Designers must also factor in 150 W of cabinet heat loss and 500 W that must be expelled to the environment so neighboring equipment is not thermally loaded. An auxiliary ±15 V rail rated at 2 A supports encoder or I/O boards, completing the unit’s peripheral power functions.