Product Description:

The RD52.1-4B-160-R-M1-FW drive controller is produced by Bosch Rexroth Indramat within the RD 500 Drive Controllers series. As a closed-loop power converter, it links plant-level control systems to high-power induction or synchronous motors, adjusting speed and torque in automated machinery, production lines, and test rigs. By monitoring motor feedback and regulating the three-phase output in real time, the unit supplies precise electrical waveforms for stable motion during demanding industrial processes. Because it regulates both output frequency and motor current, the controller can also support applications that need steady torque at low speed and smooth response when the load changes.

With a continuous mechanical output of 160 kW, the controller is suited to large pumps, extruders, and press drives. Its input stage is a three-phase AC converter that operates across a nominal range of 380 to 480 V and tolerates line variation of ±10 %, allowing direct connection to common industrial feeders. Heat is removed through liquid cooling with an internal pump, a cooling arrangement used on units above 132 kW. This method helps keep internal temperatures stable during sustained full-load operation and supports installation in high-power cabinets where thermal management is important.

Dynamic energy from motor deceleration is redirected by the controller’s built-in brake chopper, which helps prevent DC-link overvoltage during braking events. Torque production is calculated using field-oriented vector control, giving tight speed regulation across the speed range and stable response under changing load conditions. An integrated mains filter attenuates conducted interference, and the power stage is supplied without output chokes when short motor cable runs are used. This arrangement can help keep the panel layout compact in applications that do not require added output filtering. The unit is part of design generation 1.