Product Description:

Bosch Rexroth Indramat manufactures the DKR02.1-W200B-BA01-01-FW, a digital intelligent AC drive controller in the DKR Drive Controllers series. It is a line series 02, design version 1 unit with function module 01 and version 01. The controller uses an analog interface for command signals and processes digital servo or resolver feedback to close control loops for high-precision servo axes. The analog interface allows the unit to accept reference values from compatible higher-level controls, while the feedback options support use with different motor feedback formats. It converts power for large synchronous or induction motors in transfer lines, presses, and machining centers, where coordinated motion and regenerative operation are required.

The control section accepts auxiliary power from a single-phase supply of AC 230 V ±10%, while the power stage is rated for an input of 3xAC 400 - 480 V ±10%. At a 4 kHz switching frequency, the inverter can deliver 120 A continuously and provide about 47 kW of output power to the motor. For short acceleration bursts, the peak current rises to 141 A, giving the axis added torque during rapid changes in speed or load. The continuous current capacity supports steady operation during long motion cycles, and the higher short-term current helps the drive respond to temporary overload demand. This supply arrangement suits standard industrial three-phase installations while keeping the control power separate from the main motor supply.

Dynamic braking energy is absorbed internally because the unit includes a bleeder and a brake resistor that can dissipate 1.5 kW continuously and store up to 240 kWs per event. This internal braking path handles returned energy during deceleration and helps limit DC-bus voltage rise when the motor is driven by the load. Heat loss from the power electronics reaches 1600 W, and a built-in blower forces air through the housing to keep the semiconductor assemblies within their operating temperature range. The controller has a total mass of 104 kg, so the cabinet structure must support a substantial installed load. Internal braking hardware and forced-air cooling allow the drive to handle repeated deceleration cycles without requiring a separate external resistor for basic operation.