Product Description:

The KDA 3.1-050-3-A0I-W1 spindle drive is built by Bosch Rexroth Indramat and belongs to the KDA Spindle Drives series. In a CNC or production cell, it links the power supply module to a high-speed motorized spindle and converts intermediate-circuit energy into controlled three-phase output for precise speed regulation. It is intended for spindle applications that require controlled acceleration, deceleration, and steady-running performance. Encoder feedback terminals and a dedicated cooling arrangement allow the control system to monitor spindle behavior closely while commanding torque and velocity during machining and other continuous-motion tasks.

The internal bus expects 300 VDC, and the power section is rated for a continuous output of 50 A, which supports rapid acceleration of medium-frame spindles without derating. An auxiliary connection supplies the heat sink blower with 220 V/50-60 Hz, so the cooling circuit can remain active even when the DC link is off. Speed reference data reach the controller as an analog value, supporting ±10 V velocity loops that remain common in many CNC systems and allowing direct speed commands from compatible controls. The permitted operating temperature range is 5 to 45 °C, so the drive is intended for controlled indoor industrial environments where heat buildup is managed.

Heat is removed by a mounted heat sink blower that provides forced cooling, helping keep semiconductor temperature stable at installation heights up to 1000 m above sea level. For feedback distribution, the servo board provides an incremental encoder output, and no second encoder input is included. This layout reduces connection complexity when only one measuring transducer is used and keeps the interface focused on spindle-speed control. The drive depends on clear airflow around the heat sink so the cooling path can work as intended during sustained operation inside a ventilated electrical enclosure.