Product Description:

The RD52.2-4B-015-D-A2-FW is a drive controller manufactured by Bosch Rexroth Indramat within the RD 500 Drive Controllers series. Positioned between the plant power network and three-phase motors, it converts fixed-frequency line power into a regulated output that matches commanded speed and torque profiles. By adjusting output frequency and voltage, it lets the motor start smoothly, hold set speed under changing load, and reduce mechanical stress during acceleration. This role makes the unit suitable for conveyor lines, pumps, and other automated machinery that require variable-speed operation under closed-loop process control.

It operates on a three-phase AC input because its supply type is converter 3 x AC. Within that configuration, it accepts line voltages from 380 to 480 V, and the permissible line fluctuation is ±10%, so the unit tolerates brief sags or swells without shutting down. The rated power output is 15.0 kW, so the connected motor can receive that continuous mechanical power under nominal conditions. The internal control algorithm uses field-oriented vector control, which resolves current and flux in d-q coordinates for dynamic speed and torque response. This control method also improves low-speed torque behavior and helps the motor respond steadily to changing process demands.

Thermal energy from the power stage is exported through a plug-through cooler (up to 110 kW), a design that pushes heat outside the cabinet and helps reduce internal temperatures. During deceleration events, a built-in brake chopper dissipates regenerative energy in an external resistor to keep the DC bus within safe limits. To reduce conducted emissions, an integrated line filter is included, removing the need for a separate filter module. The unit is part of Generation 2 in the RD 500 platform. Auxiliary functions include external standby power and a starting lockout.