Product Description:

Bosch Rexroth Indramat builds the DKR03.1-W200B-B as part of the DKR Drive Controllers series. It is a digital intelligent AC drive controller for high-power servo or spindle motors in automated machine tools and production cells. The unit converts line energy into precisely modulated three-phase output for torque, speed, and position control. This arrangement supports controlled spindle operation and coordinated axis motion in demanding industrial equipment. The controller is intended for cabinet installation in high-output drive systems.

An internal bleeder is installed so excess DC-bus voltage is drained through a resistor rather than fed back to the mains. At a 4 kHz switching frequency, the drive can supply a continuous phase current of 92 A and deliver up to 35 kW of continuous mechanical power to the motor shaft. For brief overloads, the control section permits a peak output of 141 A, giving the machine added acceleration margin during rapid indexing. The control electronics use a single-phase input of AC 230 V ±10%, while the power section accepts 3×AC 400–480 V ±10% three-phase mains. At the rated operating point, the power components, gating transistors, and bleeder release 1200 W of heat that must be removed by the integrated blower.

The braking circuit can absorb a sustained 1 kW and store up to 150 kWs of kinetic energy during deceleration, which helps protect the DC link and the connected supply from voltage spikes. A mass of 49 kg concentrates the heat sink and blower assembly into a cabinet-mountable frame. Air forced through the cooling channels is the only cooling method, so no external liquid loop is required. The type code includes a current rating of 200 for the nominal RMS output class, and the product is Design 1 and Line 03. Digital servo and resolver feedback interfaces are provided for high-resolution position loops with compatible motors, and these interfaces allow direct processing of position and speed signals during closed-loop operation.