Product Description:

The KDA 2.1-150-3-LYS-W1 is a spindle drive manufactured by Bosch Rexroth Indramat within the KDA Spindle Drives series. In machining centers and CNC equipment, it converts a fixed DC link into a controlled three-phase output that regulates spindle speed and torque. This control element allows rapid acceleration, deceleration, and precise velocity holding, making it a core component for cutting, drilling, and grinding axes that operate under changing load conditions. Because spindle demand can change as tools enter or leave the cut, stable regulation helps maintain consistent motion during material removal.

Key operating limits include a rated output of 150 A on a 300 VDC DC link, so the power section can supply large spindle families without saturation. Thermal management relies on a heat sink-mounted blower with an independent AC supply of 220 V/50-60 Hz; together with forced cooling, this airflow keeps semiconductor junctions within their permitted limits during prolonged high-load cycles. The permitted ambient temperature range is 5 to 45 °C, which helps prevent condensation at the low end and overheating at the high end. The separate blower supply also allows cooling air to remain available independently of the main power section.

For control and feedback, the electronics provide a diagnostic serial link over RS-232-C for status access and parameter handling, along with a second encoder path that accepts quadrature or resolver signals to synchronize auxiliary axes. Real-time velocity commands reach the regulator through the SERCOS interface, enabling cycle-accurate setpoint updates from the CNC kernel and responsive spindle control during speed changes. Installation is permitted up to 1000 m above sea level. This combination of communication and feedback support allows the drive to work with CNC control loops while tracking spindle behavior throughout operation.