Product Description:

The DKR04.1-W400N-BA04-01-FW is a drive controller in the DKR Drive Controllers series produced by Bosch Rexroth Indramat. It is a digital intelligent AC drive controller used for large servo or spindle motors in automated machining centers, presses, and handling systems. By combining power conversion, velocity regulation, and protective monitoring in one housing, the unit delivers the torque and speed response required for coordinated multi-axis motion. Its control role also suits machines that need repeatable speed changes, controlled acceleration, and dependable response under varying process loads.

During continuous operation at a 4 kHz switching frequency, the controller can supply 210 A of RMS output current, which supports stable torque production under sustained load. At the same carrier frequency, the power stage is rated for 93 kW, and for brief acceleration or shock loads the drive can reach 282 A without exceeding its intended operating range. The mains section accepts 3×AC 400–480 V ±10 %, while logic and relay circuits use a separate AC 230 V ±10 % control supply. This separated supply arrangement helps keep control functions stable when the main power section is handling changing motor demand.

Thermal losses are removed by a built-in air blower, and the cooling path must dissipate about 2500 W to keep internal components within their permitted temperature range. Because the power section has no brake chopper, braking energy returns to the supply or is absorbed by the mechanical system during deceleration. The unit has a mass of 150 kg, and the frame is assigned a current rating of 400 A, so mounting provisions must support both its size and electrical capacity. An analog command interface, digital servo and resolver feedback, line code 04, design version 1, and function module version 01 complete the controller's configuration.