Product Description:

The DKR03.1-W200B-BE79-01-FW is a digital intelligent AC drive controller produced by Bosch Rexroth Indramat within the DKR Drive Controllers series. The unit belongs to line 03, design version 1, and function module version 01. It serves as the power stage between a machine control system and high-torque servo or spindle motors, delivering regulated three-phase output while receiving motion commands through the SERCOS interface and position data by way of digital servo or resolver feedback. This control structure supports coordinated axis motion in applications that require stable speed regulation, controlled torque delivery, and accurate response to changing load conditions.

For power distribution, the drive accepts a rated three-phase mains supply of 400 to 480 VAC with a ±10% tolerance, while its logic section derives control functions from a separate 230 VAC supply. When operated at a 4 kHz switching frequency, it can deliver a continuous output current of 92 A, which corresponds to roughly 35 kW of motor output for connected axes. A built-in air blower forces cooling air across the heat sinks to maintain semiconductor temperature during sustained operation. Current rating code 200 identifies the hardware size used for this output range and matches the electrical loading handled by the power section.

During deceleration, an internal bleeder directs surplus energy into a brake resistor rated for 1 kW of continuous dissipation and able to absorb up to 150 kWs of kinetic energy without external hardware. The controller can supply a short-term peak of 141 A to overcome static loads, and its thermal loss is limited to 1200 W during operation. With a mass of 49 kg, the chassis supports cabinet mounting, adds heat capacity for repeated duty cycles, and helps the unit remain mechanically stable in larger drive assemblies.