Product Description:

The DKR04.1-W300N-BA03-01-FW is a drive controller from the DKR Drive Controllers series by Bosch Rexroth Indramat. It converts three-phase line power into regulated AC for servo and spindle motors while providing closed-loop torque, speed, and position control. This type of controller is used in machine tools and automation cells where fast axis response and stable motion regulation are required. Its integrated control and power functions allow it to support demanding industrial motion tasks without a separate external control stage for basic drive operation.

At a carrier frequency of 4 kHz, the inverter can deliver a continuous armature current of 185 A. The power section supports up to 82 kW of mechanical output, while the control electronics use a separate AC 230 V supply for stable operation. The main power input accepts 3 x AC 400 to 480 V, which matches common industrial mains systems. Heat is removed by a built-in air blower that directs airflow across the internal heat sinks. Resolver and digital feedback paths support precise motion control, and the DC bus does not include a brake chopper, so regenerated energy must be handled by external equipment.

For short-term demand, the drive can provide a peak current of 212 A, which helps during acceleration and other temporary overload conditions. During continuous operation, the electronics dissipate 2250 W of heat, so enclosure ventilation must be sized to remove that thermal load. The controller has a mass of 150 kg, and the mounting arrangement must support that weight while maintaining rigidity during operation. Command signals enter through an analog interface, allowing direct use with control systems that provide ±10 V references. The unit uses function module 03 with version 01, along with line series 04 and design version 1. Because it does not include an internal brake resistor, high-inertia applications require external energy dissipation or a mechanical braking method.

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