KDA 3.2-100-3-LQI-W1 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat KDA 3.2-100-3-LQI-W1 is a spindle drive from the KDA Spindle Drives series, with a rated current of 100 Amps and a DC supply voltage of 300 Volts. It features forced cooling through a mounted heatsink blower and includes an incremental encoder output. The drive supports SERCOS interface for speed commands and operates in ambient temperatures from 5 to 45 degrees Celsius.
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Product Description:
The KDA 3.2-100-3-LQI-W1 spindle drive is produced by Bosch Rexroth Indramat and belongs to the KDA Spindle Drives series. As a closed-loop power module, it regulates high-speed spindle motors used in machining centers and other automated tools, converting DC bus energy from a supply unit into a controlled three-phase output. By integrating current, velocity, and position control in one housing, the drive provides the fast torque changes required for drilling, milling, and turning processes in industrial automation. It is intended for applications that need repeatable speed regulation and stable torque delivery across varied operating loads.
The drive delivers a continuous output of 100 A, which is the maximum steady-state current it can feed to a spindle without thermal derating. Its internal power stage is energized from a bus voltage of 300 VDC, matched to Indramat supply modules installed in multi-axis cabinets. Thermal management relies on a dedicated blower powered from an auxiliary line of 220 V / 50-60 Hz, which separates cooling power from the main DC link and keeps converter losses away from the control electronics. Air is pulled through a heat sink-mounted blower, and the internal channels help maintain component temperatures under load. The drive uses forced cooling, so heat is removed by active airflow rather than natural convection during extended duty cycles.
The permissible ambient range is 5 to 45 °C, so the controller can operate next to machine tools without additional climate conditioning. Cabinet placement must stay within 1000 m above sea level to preserve dielectric clearances and blower performance. For motion feedback distribution, an incremental encoder output is provided on the front panel, enabling a second drive or an external PLC to read actual spindle speed. Command values arrive digitally through the SERCOS interface, allowing synchronized cutting cycles across multiple axes without analog drift.
