Product Description:

The DKR03.1-W100B-BA03-01-FW is a digital intelligent AC drive controller manufactured by Bosch Rexroth Indramat for the DKR Drive Controllers series. It is used to regulate servo and spindle motors in automated machining cells, transfer lines, and multi-axis handling equipment. By converting incoming power into controlled three-phase output and managing regenerated energy during deceleration, the unit supports accurate torque, speed, and position control. It is intended for applications that require stable motor response during acceleration, synchronized motion, and repeated braking cycles.

The drive connects to a three-phase supply of 400–480 V AC and uses an auxiliary 230 V AC control circuit, each with ±10% tolerance. At a 4 kHz PWM rate, it can sustain 71 A of continuous current and deliver about 26 kW of output power. Dynamic stopping is supported by an internal brake resistor rated for 1 kW of continuous dissipation, and an internal bleeder removes excess DC-link voltage without extra hardware. The controller processes servo or resolver feedback to close the position and velocity loops, which allows the connected motor to respond accurately to changing load conditions. Cooling is handled by a built-in air blower that moves air across the heat sinks to support continuous operation.

Total heat loss reaches 900 W, and the built-in air blower removes this heat to keep internal components within their operating limits. During heavy deceleration, the brake resistor can absorb up to 150 kWs of kinetic energy, coordinated by the internal bleeder to protect the power section. Parameter changes are made through the analog interface, and the modular electronics use design version 1, function module 03, version 01, and line 03. The controller has a mass of 49 kg, which is suitable for cabinet mounting where the enclosure provides adequate airflow and vibration control.