Product Description:

The RD52.1-4B-022-D-NN-FW is a drive controller produced by Bosch Rexroth Indramat and is part of the RD 500 Drive Controllers series. In an automation cell, it regulates induction or synchronous motors by modulating stator voltage and frequency so that velocity, torque, and position stay aligned with program commands. The controller sits between the plant's three-phase mains and the motor windings, translating line power into controlled pulses for coordinated motion. That operating role allows a higher-level control system to manage acceleration, steady-state speed, and stopping behavior across connected machine sections without placing those tasks directly on the motor.

This model relies on field-oriented vector control, allowing independent regulation of flux and torque-producing current components for fast dynamic response. This control method supports stable operation when load conditions change and helps maintain accurate motor behavior at low and moderate speeds. A built-in brake chopper routes regenerative energy to an external resistor to keep the DC link voltage within limits during deceleration. The drive includes an integrated mains filter that attenuates conducted emissions and simplifies cabinet wiring. Power is accepted through a three-phase AC converter input, and the controller operates over a supply range of 380 to 480 V. Acceptable line variation is limited to ±10 %, which suits industrial power systems that remain within standard tolerance bands.

Continuous mechanical output is rated at 22 kW, and heat is carried outside the enclosure by a plug-through cooler, which helps keep cabinet temperature lower. The unit is design generation 1 and supports first-generation RD500 option cards. The drive does not include onboard application functions, so motion profiling and sequencing are handled by an external PLC or CNC. This arrangement keeps the controller focused on power conversion and motor regulation while the machine control system manages the operating sequence.