Product Description:

The KDA 2.1-100-3-LYS-W1 is a spindle drive produced by Bosch Rexroth Indramat within the KDA Spindle Drives series. In machining centers and turning equipment, this module converts control commands into regulated three-phase power that rotates high-speed spindles with consistent torque and speed. By combining drive electronics, a heat sink, and a blower in one enclosure, it helps reduce cabinet complexity while allowing the CNC controller to supervise spindle behavior. It is used where spindle acceleration, steady-state speed holding, and controller feedback must remain coordinated during automated machining.

Internal power for the drive stage is taken from a DC link rated at 300 VDC, and the power electronics can supply a continuous phase current of 100 A to the motor. That current capacity supports demanding spindle loads during cutting cycles and rapid speed changes. Velocity setpoints are received through the SERCOS interface, which carries synchronized command and diagnostic data between the controller and drive. The heat sink fan is energized by an auxiliary supply of 220 V at 50–60 Hz, which keeps the cooling load separate from the control circuitry. Efficient heat removal is achieved with forced cooling, helping the drive remain stable during sustained spindle demand. The unit can be operated at elevations up to 1,000 m above sea level without additional adjustment.

The thermal system uses a mounted heat sink blower that directs airflow across the IGBT module and bus capacitors. Parameter changes and diagnostics can be handled through the serial interface (RS-232-C), while a second encoder input with a synchronous channel supports real-time spindle position feedback for tandem axes or manual reference tasks. Reliable operation is specified from 5 to 45 °C, which matches the temperature range commonly maintained in industrial control cabinets. The additional feedback channel supports applications that require synchronized spindle position information alongside speed control.