Product Description:

The DKR02.1-W200N-BA12-01-FW is a digital intelligent AC drive controller manufactured by Bosch Rexroth Indramat for the DKR Drive Controllers series. Intended for multi-axis machining centers and large transfer lines, the unit converts three-phase line energy into regulated motor currents so that synchronous or asynchronous servomotors receive precise torque, speed, and position commands. Inside an automation cell, it links CNC or PLC motion outputs to the mechanical load while adding closed-loop regulation, protection functions, and diagnostic reporting for high-throughput tasks. That arrangement helps the controller maintain stable axis response during rapid changes in speed and load.

At the control level, velocity and torque references enter through an analog interface and are digitized for internal processing. At a switching frequency of 4 kHz, the power stage delivers 120 A of continuous current, translating into 47 kW of usable shaft power. The logic and gate drivers use an auxiliary supply of AC 230 V, ±10%, which helps isolate the control circuitry from line disturbances. Thermal management relies on a built-in air blower that forces ambient air across the heat sink to keep junction temperatures within limits. Resolver or digital feedback lines return rotor position to the controller, and the DC bus, which is implemented without a brake chopper, stores regenerative energy until other axes can use it.

For line connection, the unit accepts 3 x AC 400–480 V, ±10%, fitting standard low-voltage switchgear. It can supply up to 141 A of peak current for short acceleration bursts above the continuous current level. Internal switching losses amount to 1600 W, which is useful when sizing cabinet ventilation. A mass of 104 kg affects handling requirements and structural loading. Because the unit has no bleeder, recovered energy must be managed elsewhere in the drive system. The function module version 01 and design version 1 identify the controller generation.