Product Description:

The RD52.1-4B-110-W-V1-FW is a drive controller produced by Bosch Rexroth Indramat within the RD 500 Drive Controllers series. As a closed-loop power converter, it interfaces between the plant’s supply network and induction or synchronous motors, delivering regulated torque and speed commands suited for automated material handling, processing, and coordinated motion axes. The unit is intended for cabinet integration in industrial automation lines where stable motor control and repeatable operation are required. Because the control loop is handled inside the drive, it can help maintain smooth acceleration and steady speed when process demand changes during operation.

Its drive section carries a built-in brake chopper, allowing it to dissipate regenerated energy internally during deceleration and helping limit DC-bus overvoltage. Motor control is executed by field-oriented vector control, so stator current is separated into torque-producing and flux-producing components for responsive low-speed operation. Thermal management is handled through liquid cooling, enabling higher power density than comparable air-cooled enclosures. For electromagnetic compatibility, an integrated mains filter reduces conducted noise on the supply connection. The unit delivers continuous output corresponding to 110 kW and accepts line voltages within 380 to 480 V, which suits common three-phase industrial power systems. This combination is useful in applications with frequent deceleration, long duty cycles, or compact cabinets that need efficient heat removal.

The power interface is a 3 x AC converter, so the controller rectifies and inverts three-phase mains power into a variable-frequency motor output. Input fluctuations are accommodated by a tolerance of ±10 %, allowing the device to maintain regulation when the incoming line drifts within that range. Control electronics remain active during mains outages because an external supply can provide 24 V standby power, which keeps diagnostics and stored operating data available. Maintaining auxiliary power during an interruption also allows status reporting and fault information to remain accessible instead of disappearing as soon as the main input drops. This behavior is useful where the drive must recover in an orderly way after brief power disturbances.