Product Description:

Bosch Rexroth Indramat’s RD52.1-4B-004-L-NN-FW belongs to the RD 500 Drive Controllers series and provides the power-conversion core for automated motion cells. It accepts three-phase mains power and modulates output frequency. This lets conveyor, pump, or positioning axes follow programmed speed profiles with minimal overshoot. The drive is suited to variable-speed tasks that require controlled acceleration and steady running behavior.

The controller is designed for a line voltage of 380 to 480 V, and its input tolerance of ±10 % allows operation on grids where supply magnitude drifts from nominal values. Power is fed through a 3 x AC converter front end that rectifies and stores DC energy before IGBT switching recreates the commanded AC waveform. The DC link created by this input stage provides a stable energy reserve during load changes. An integrated mains filter attenuates conducted emissions, reducing the need for external RFI components in the cabinet. Excess regenerative energy is dissipated through a built-in brake chopper, protecting the DC link when a decelerating load returns power.

Motor dynamics are calculated with field-oriented vector control, enabling precise torque production even at low shaft speeds. This control method helps the motor respond smoothly to changing load conditions during slow or steady operation. Thermal management is handled by forced air cooling, so fans channel cabinet air across the heat sink during continuous duty. Cabinet airflow must remain unobstructed around the power section for effective heat removal. The hardware corresponds to design generation 1 in the RD 500 platform. The unit has no optional technology functions, so extended process control features must be handled by the PLC or higher-level motion controller.