Product Description:

The RD52.3-8C-160-R-V1-FW is a drive controller manufactured by Bosch Rexroth Indramat as part of the RD 500 Drive Controllers series. Acting as a high-power inverter, it bridges a DC link and three-phase motors to regulate speed and torque in automated machinery. By converting fixed-voltage DC into variable frequency and amplitude, the unit supports vector-based motion control in conveyors, extruders, and other heavy industrial systems where stable speed regulation and efficient motor operation are required. This makes it suitable for process lines that need controlled acceleration, steady torque at low speed, and repeatable response during long-duty cycles.

Its control section uses field-oriented vector control, allowing independent regulation of flux and torque for fast response under changing load. The power stack is stabilized by liquid cooling with an internal pump, a cooling method used on ratings of 132 kW and above to keep semiconductor temperatures within limits during sustained operation. When connected to a 700 V DC link, the inverter can deliver a continuous output of 160 kW. The input side uses a DC inverter input rather than direct mains power, so the unit must operate with a rectifier or active front end upstream. This arrangement also suits installations where a shared DC bus feeds multiple axes or large process drives.

This controller belongs to generation 3, and it can also operate in RD51 SFT mode when that structure is required in an existing system. An external supply provides 24 V standby power, keeping the control electronics active while the main power stage is isolated so diagnostics and communication remain available. The standby supply also helps preserve interface availability during controlled stops or service isolation. Control software is supplied as a separate subposition, which allows the required revision to be selected independently of the power unit.