Product Description:

The KDA 3.2-150-3-A00-W1/S001 spindle drive is produced by Bosch Rexroth Indramat within the KDA Spindle Drives series. Designed for machine-tool spindles, the unit converts a stabilized DC link into controlled three-phase output so that a CNC controller can command precise rotational speeds during milling, drilling, or grinding. It acts as the link between the power supply and a high-frequency motor, supporting closed-loop speed regulation for automated metal-cutting equipment. This operating role helps the spindle respond smoothly to changing load conditions during cutting, where stable speed supports consistent machining results.

The drive operates from a DC bus of 300 VDC, supplied by an external converter that provides the energy needed for rapid spindle acceleration. Under continuous duty, it can deliver 150 A of motor current, allowing substantial torque at low speed and stable current control at high speed. Thermal management is handled by a mounted heat sink blower that forces air directly over the power semiconductors. This cooling method is forced cooling and uses an auxiliary single-phase supply of 220 V/50–60 Hz for the blower motor, helping the power section remain stable during sustained machining cycles and repeated changes in spindle load.

The unit is intended for operation within 5 to 45 °C, and it may be installed up to 1000 m above sea level without performance derating. Speed references are accepted as an analog voltage, permitting direct connection to legacy CNC control channels and straightforward integration with established control layouts. The drive has no additional interface option, and the second encoder socket is absent when only primary spindle feedback is required, which keeps the connection arrangement simpler. It is part of Series 3 with Version 2 hardware, which identifies the product revision used for this model.