Product Description:

The DKR02.1-W300B-BE37-01-FW is an AC drive controller built by Bosch Rexroth Indramat for the DKR Drive Controllers series. The unit functions as the power and regulation stage between a higher-level motion processor and the field motor, shaping three-phase output that matches commanded torque and speed. It converts DC-bus power into controlled motor current, allowing coordinated acceleration, steady-speed operation, and controlled deceleration on demanding axes. In industrial automation, it is used on heavy gantry axes, metal-cutting spindles, and other applications where fast current loops and dynamic braking are needed to keep large loads under control.

The power circuit includes a factory-installed bleeder resistor, listed as with a bleeder resistor, and it dissipates regenerated energy so the DC-bus voltage stays within safe limits during rapid deceleration. This helps manage energy returned by the motor during abrupt stops or overhauling load conditions. Control data reach the device through the SERCOS interface, allowing deterministic fiber-optic communication with CNC or PLC masters. Thermal management relies on air cooling with a built-in blower, so heat is expelled directly through the drive’s fin stack. The inverter section has a 300 A current rating, enabling the controller to drive large torque motors without saturation. Position and velocity loops accept digital servo and resolver feedback, so the controller can operate with motors that use either digital encoder signals or analog resolver signals.

The unit is Version 1, indicating the first mechanical layout of this line. It uses Function Numeric Version 01 to match the corresponding SERCOS command set. The controller is part of Line 02, which uses the power-stage topology and connector placement common to this generation. These identifiers distinguish the electrical and command-set grouping used by this controller.