Product Description:

The RD52.2-4B-018-L-NN-FW drive controller is manufactured by Bosch Rexroth Indramat and belongs to the RD 500 Drive Controllers series. Positioned between the three-phase mains and an industrial motor, it modulates electrical input to meet the torque and speed demands of automated systems such as conveyors, mixers, and positioning tables. By embedding motor-specific software and gate-drive hardware in a compact chassis, the unit supplies the closed-loop regulation required in automated production equipment. This arrangement lets the controller adjust voltage and frequency continuously so the connected motor can respond smoothly to changing process demands.

The power stage is rated for 18.5 kW, meaning the device can sustain this output under nominal conditions. A built-in brake chopper dissipates regenerated energy from rapid deceleration, helping prevent DC-link overvoltage without external braking hardware. Motor control is executed with field-oriented vector control, which calculates stator flux in real time so torque follows reference commands with high dynamic accuracy. Thermal stability is maintained by forced air cooling, and an internal fan moves air across the heat sink to support stable operation. To reduce conducted emissions and protect upstream circuitry, an integrated mains filter attenuates high-frequency switching noise. No additional function option is included in this version.

The supply side uses a three-phase AC converter topology that rectifies and inverts incoming line power. It accepts a phase-to-phase window of 380 to 480 V, allowing installation on common industrial networks without tap-changing transformers. Line fluctuations are accommodated by a tolerance of ±10 %, so brief overvoltage or undervoltage events are less likely to interrupt operation. Classified as generation 2, the hardware uses revised IGBT gate drivers and updated diagnostics. These updates support stable control behavior and improve fault monitoring during routine drive operation.