Product Description:

The DKR02.1-W300N-BA35-01-FW is a digital intelligent AC drive controller produced by Bosch Rexroth Indramat within the DKR Drive Controllers series. Designed for high-power servo axes, the unit converts three-phase mains energy into regulated motor current so that large Indramat synchronous or induction motors can be positioned quickly and repeatedly. It interfaces directly with higher-level machine controls through an analog command channel and uses a rigid DC bus without a brake chopper, making it suitable for installations where dynamic braking energy is handled externally.

During continuous operation at a 4 kHz switching frequency, the drive can provide 141 A of phase current, supporting sustained motor torque under load. Its thermal and electrical design supports a continuous shaft power of 55 kW, allowing the controller to run large mechanical loads without derating. Internal logic and contactors are supplied from AC 230 V ±10 %, while the power stage is energized by 3xAC 400–480 V ±10 %, so the control supply remains separate from the main power input. For acceleration or shock loading, the electronics can deliver a peak current of 212 A, giving short bursts of additional torque without exceeding permissible semiconductor limits.

Thermal management relies on a built-in air blower that removes internal losses, and it can dissipate up to 1800 W of heat from the power devices and bus bars during demanding duty cycles. Diagnostic circuitry monitors operating conditions and identifies overloads during operation. Closed-loop motion data return through digital servo and resolver feedback, enabling precise commutation without external converters. The steel housing weighs 104 kg and remains suitable for cabinet mounting beside external braking resistors required by the rigid DC bus configuration.