Product Description:

The DKR02.1-W300N-BA12-01-FW is a digital intelligent AC drive controller produced by Bosch Rexroth Indramat for the DKR Drive Controllers series. In automated machining centers and robotics, this controller converts three-phase line power into regulated DC and pulse-width modulated output so it can command high-power servo and spindle motors with accurate motion control. Digital servo and resolver feedback channels support precise position capture, allowing the drive to regulate speed and position during demanding axis movements. This arrangement lets the controller support both continuous spindle operation and dynamic servo positioning within the same drive platform.

At a switching frequency of 4 kHz, the drive sustains 141 A of motor phase current and delivers about 55 kW of mechanical power. Its logic circuits use a separate control supply of AC 230 V ± 10%, which keeps the control electronics independent of the main power stage. The unit has a system current rating of 300 A, so upstream protection devices and busbars must match that value. Speed and torque commands are exchanged through an analog interface, making the controller compatible with classic CNC and PLC platforms that issue ±10 V references. This signal format fits systems that use established analog command structures instead of networked motion buses. Thermal energy from the IGBTs is removed by an internal airflow path driven by a built-in blower.

During acceleration or rapid positioning, the controller can supply a peak phase current of 212 A from a three-phase input rated at 3×AC 400–480 V ± 10%. Because the unit has no internal bleeder, regenerative energy must be handled by an external resistor or returned to the grid rather than dissipated inside the controller. Total heat dissipation is 1800 W, so cabinet ventilation must be sized for that thermal load. The unit is design version 1, line series 02, and function module 01 for parameter compatibility. Despite its output range, the controller has a shipping weight of 104 kg, which allows handling with standard lifting equipment.