Product Description:

The RD52.1-4B-400-R-VW-FW is a drive controller produced by Bosch Rexroth Indramat for the RD 500 Drive Controllers series. As a converter-stage device, it links the plant mains to an induction or synchronous motor and executes closed-loop speed or torque tasks in automated machinery. By combining power conversion with vector regulation, the unit delivers precise motor handling in production lines, test stands, and similar environments where repeatable dynamic response is necessary. This operating approach supports stable performance during starts, load changes, and continuous-process duty.

This controller uses a three-phase AC converter input and operates inside a line window of 380 to 480 V. Incoming fluctuations are accepted within a tolerance of ±10 %, preventing nuisance trips on lightly regulated grids. When the DC bus is charged, the inverter section can deliver up to 400 kW of mechanical output, a rating matched to high-power extruders, winders, or centrifugal compressors. Vector modulation is executed with field-oriented vector control, allowing independent adjustment of flux and torque components for smooth acceleration even at low speed. The base hardware belongs to design generation 1. Separate software can be used on this platform to provide the required application profile.

Thermal management relies on liquid cooling with an internal pump for 132 kW and above, so heat is removed without loading the cabinet air circuit. The cooling arrangement helps keep heat away from other cabinet components, which is useful in tightly packed industrial installations. Dynamic braking energy is dissipated through a built-in brake chopper, sparing external resistor assemblies on moderate duty cycles. To reduce conducted emissions, an integrated mains filter sits at the line entrance. Functional coverage is extended by the V- and W-option set designated as Combination: V1 + W1, which adds application-specific monitoring and communication blocks.