Product Description:

The RD52.1-4B-018-L-V1-FW drive controller is produced by Bosch Rexroth Indramat as part of the RD 500 Drive Controllers series. It is designed to interface with three-phase industrial power and command AC motors in automated production cells. By converting incoming line power and modulating output frequency, the controller delivers precise torque and velocity profiles required for conveyors, winders, and processing equipment. The controller is intended for variable-speed applications where stable motor control is required across changing process conditions.

Electrical compatibility starts with a 380 to 480 V input window that allows installation on international low-voltage networks, and the drive uses a Converter 3 x AC front end. Under rated conditions, the unit supplies 18.5 kW of motor power to the connected load. Transient energy returned during fast deceleration is dissipated by the built-in brake chopper, which helps prevent DC-link overvoltage and removes the need for an external resistor module. Torque production is coordinated by field-oriented vector control, a closed-loop algorithm that separates stator current into flux and torque components for dynamic response. This model is identified as design generation 1 in the type code.

Thermal and support functions complement the power stage. Heat is removed by forced air cooling, allowing continuous operation in control cabinets with limited airflow. Line-side disturbances are attenuated by an integrated mains filter, which lowers conducted emissions and simplifies EMC compliance. The filter also helps reduce interference on shared supply lines. For the control electronics, an external 24 V standby power feed keeps parameter memory and communication modules active during power outages. The drive operates within a ±10 % tolerance range, giving additional headroom when utility supply fluctuates and helping the control section recover quickly after a brief interruption.