Product Description:

The DKR03.1-W200B-BE43-02-FW is a drive controller produced by Bosch Rexroth Indramat within the DKR Drive Controllers series. It is a Digital Intelligent AC Drive Controller that converts three-phase input power into controlled motor voltage for automated axis motion. By combining power switching, feedback processing, and regenerative braking in one chassis, the unit serves high-performance positioning systems in automated machinery and transfer lines. Its integrated layout allows motor control and braking response to be handled within the same housing.

The inverter can deliver a continuous output of 92 A at a 4 kHz switching frequency, which is the sustained load current available to the motor windings. For short acceleration periods, it supplies a peak of 141 A to provide additional torque without exceeding thermal limits. Line power is accepted from a 3×AC 400 … 480 V ±10 % source, while the control electronics use AC 230 V ±10 % to keep logic power separate from the main power stage. The internal DC link has a nominal current rating of 200 A for large-frame drive applications. Command data travels over the SERCOS interface, and the controller can process both digital servo and resolver feedback. Heat from the IGBT section is removed by a built-in air blower.

A built-in bleeder resistor handles excess kinetic energy with a continuous dissipation capacity of 1 kW and can absorb up to 150 kWs during abrupt stops. Overall power loss is 1200 W, so the enclosure requires enough panel airflow to move heat away from internal components during operation. The steel housing, blower, and bleeder bring the unit’s mass to 49 kg, which affects mounting support requirements. During rapid deceleration, regenerated energy is routed to the internal bleeder instead of remaining on the DC link, helping the controller manage repeated stop-and-go motion.