Product Description:

The DKR04.1-W400E-BE34-02-FW is a digital intelligent AC drive controller manufactured by Bosch Rexroth Indramat for the DKR Drive Controllers series. It belongs to Line 04 and is supplied in design version 1. Within an automation cell, this unit converts incoming three-phase power into regulated output for high-torque servo motors and coordinates motion through the SERCOS fieldbus with built-in position feedback channels. The controller supports both digital servo and resolver feedback, and its external bleeder with a rigid DC bus allows the integrated brake chopper to dissipate regenerated energy during rapid deceleration. This arrangement suits spindle drives and gantry axes that require stable torque, responsive braking, and repeatable closed-loop motion under changing load.

The drive exchanges cyclic commands through the SERCOS interface, while closed-loop control adapts to mechanical load by delivering a continuous current of 210 A at a 4 kHz switching frequency. At that same switching frequency, it can supply up to approximately 93 kW of mechanical power to the motor shafts. Internal logic and fan circuits are powered from a separate AC 230 V ±10% control supply, isolating them from main line disturbances. The power stage accepts a mains input of 3×AC 400 to 480 V ±10%, matching common plant distribution voltages. Thermal modeling allocates a total heat dissipation of 2500 W, which the housing directs toward exhaust paths to help prevent component derating. The product group classification indicates menu-based parameter settings rather than analog trimming, and the current rating code 400 places the device in a high-current range for spindle or gantry axes.

Temperature rise is controlled by an internal blower that moves ambient air through dedicated channels, so cooling is provided by a built-in air blower. Under dynamic peaks, the inverter can output a momentary current of 282 A without violating semiconductor limits, giving extra torque for acceleration or impact cutting tasks. Structural rigidity is reflected in a transport mass of 150 kg, which helps damp cabinet vibration. The external bleeder path helps keep bus voltage stable during regeneration when the axis returns energy to the DC bus.