KDA 3.2-050-3-AQS-W1 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat KDA 3.2-050-3-AQS-W1 spindle drive is part of the KDA Spindle Drives series and operates with a rated current of 50 Amps at a DC supply voltage of 300 VDC. It uses a mounted heatsink blower for forced cooling, with an AC source requirement of 220V at 50-60Hz. The drive supports serial interface RS 232 C connections and is designed for operation in ambient temperatures from 5 to 45 degrees Celsius up to an elevation of 1000 meters.
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Product Description:
The KDA 3.2-050-3-AQS-W1 is a spindle drive released by Bosch Rexroth Indramat within the KDA Spindle Drives series. It is intended to regulate the torque and rotational speed of machine-tool spindles, converting the DC link energy supplied by the associated power supply into controlled three-phase output for high-precision machining axes. In machine tools, it provides the controlled output needed for cutting, drilling, and similar spindle applications that require stable speed under changing load. By placing the drive electronics in the cabinet rather than on the motor, the unit supports easier service access and keeps the spindle assembly less crowded. This arrangement also allows the rapid acceleration and deceleration required in automated production lines.
This model is dimensioned for a continuous armature current of 50 A, so drive sizing calculations must consider conductors and protection rated for that value. Its power stage is energized from a DC bus at 300 VDC, which is normally delivered by a modular supply in the same rack; this voltage sets the maximum achievable spindle back EMF. Speed reference arrives as an analog signal, enabling proportional command from a CNC controller without digital fieldbus overhead. A serial RS-232-C interface provides access for diagnostics and parameter setup. Thermal stability comes from a mounted heat sink blower that operates under forced cooling; the blower itself is fed by an auxiliary line of 220 V at 50/60 Hz, providing consistent airflow regardless of spindle load or cabinet temperature.
The drive operates in ambient temperatures from 5 °C to 45 °C, so cabinet cooling must keep the surrounding air within that range. Installation is permitted up to 1000 m above sea level, because reduced air density above that height can impair heat dissipation. Operation beyond these limits can reduce cooling effectiveness and may require additional airflow or derating. The product is Series 3 in the KDA range. It is Version 2.
Frequently Asked Questions about KDA 3.2-050-3-AQS-W1:
Q: What is the rated current for the KDA 3.2-050-3-AQS-W1 spindle drive?
A: This drive operates with a rated current of 50 A, providing significant power for demanding spindle applications.
Q: How is the KDA 3.2-050-3-AQS-W1 spindle drive cooled?
A: A mounted heatsink blower supplies forced cooling to enhance thermal management during operation.
Q: What type of additional interface is available on the KDA 3.2-050-3-AQS-W1?
A: The spindle drive utilizes a serial interface (RS 232 C) for additional connectivity.
Q: What is the AC requirement for the heatsink blower on this spindle drive?
A: It accepts an AC source for the heatsink blower at 220V and 50-60Hz.
Q: What is the permissible ambient operating temperature range for the KDA 3.2-050-3-AQS-W1?
A: The allowed ambient temperature range for use is 5 to 45 degrees Celsius.
