Product Description:

The RAC 2.2-200-380-A00-W1/S001 spindle drive controller is manufactured by Bosch Rexroth Indramat and belongs to the RAC Spindle Drive Controllers series. As an AC main spindle drive controller, it forms the power and regulation stage between the CNC and the motor, supplying controlled three-phase energy so that machining spindles reach commanded speed and torque values in industrial automation lines. The unit regulates motor current and speed in response to CNC commands, which helps maintain stable spindle behavior during cutting processes. It is suited to machine tools that require controlled acceleration, deceleration, and continuous spindle duty.

This controller operates with a continuous line load of 200 A, so supply conductors, fuses, and contactors must be sized for that current. It connects to a three-phase mains of 3 x AC 400 V, and its power electronics are synchronized to grids in the 50–60 Hz range, allowing installation in most industrial plants without an additional transformer. Motion commands arrive as an analog (±10 V) velocity reference, which the internal control loop converts into torque-producing current for spindle regulation. Using this voltage reference format allows direct connection to common CNC analog command outputs. Heat generated by the IGBT stack is removed through an internal blower, eliminating the need for external ducting and helping the drive maintain stable operating temperature during sustained use.

Control wiring is landed on interface terminal X4, 9 poles, separating low-level I/O from power conductors and simplifying cabinet layouts. Separating the control section from the power section can also help reduce interference in command wiring. The product is Series 2 and Version 2. Regenerative braking energy is handled by the standard bus capacitors because the unit is supplied without an additional bleeder, so applications that demand extended dynamic braking may require an external resistor bank. It is also delivered without an additional encoder input, so any secondary position transducer must be processed by the machine controller rather than the drive itself.