KDA 3.2-100-3-DPS-U1 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat KDA 3.2-100-3-DPS-U1 is a spindle drive from the KDA Spindle Drives series. It operates with a rated current of 100 Amps and uses a mounted heatsink blower for forced cooling, powered by a 115V AC source. The spindle drive supports a DC supply voltage of 300 VDC and features a serial interface as well as a digital 16-bit parallel speed command value.
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Product Description:
The KDA 3.2-100-3-DPS-U1 is a spindle drive manufactured by Bosch Rexroth Indramat and assigned to the KDA Spindle Drives series. Within a machining center or grinding line, this unit forms the power stage between the CNC controller and a high-speed spindle motor, translating digital speed commands into precisely regulated three-phase output. It is intended for closed-loop spindle applications where stable speed and torque are required across varying process loads. That arrangement allows the spindle to respond quickly to commanded speed changes during cutting, grinding, and positioning tasks. Series 3 and version 2 identify the product revision used for this model.
The drive draws its DC bus from an external supply rated at 300 VDC and can deliver up to 100 A of continuous output to the spindle windings. It accepts a 16-bit parallel digital reference, allowing the controller to command speed with fine resolution and without analog drift. Parameter changes and fault reporting are handled through an integrated RS-232-C serial interface, while a second encoder connection can be used for additional motor or spindle feedback during synchronized motion. The internal heat sink blower is powered by an auxiliary supply of 115 V at 50/60 Hz, which keeps the cooling circuit separate from the main DC bus and allows airflow to remain available when the power stage is inactive.
Thermal management relies on a mounted heat sink blower that pushes air directly across the power modules, and the drive uses forced cooling during high-load operation. The permissible ambient range is 5 to 45 °C, so installation outside this band requires derating or supplemental air conditioning to limit internal temperature rise. Operation is permitted up to 1000 m above sea level, because higher elevations reduce air density and lower blower effectiveness. Adequate cabinet clearance around the airflow path helps prevent recirculation of warm air through the blower, especially when other heat-producing equipment is mounted nearby.
Frequently Asked Questions about KDA 3.2-100-3-DPS-U1:
Q: What type of additional interface is available on the KDA 3.2-100-3-DPS-U1 spindle drive?
A: This model includes a serial interface (RS 232 C) for additional connectivity options.
Q: What is the rated current rating for the KDA 3.2-100-3-DPS-U1 spindle drive?
A: The KDA 3.2-100-3-DPS-U1 offers a rated current of 100 A for spindle drive applications.
Q: How is the KDA 3.2-100-3-DPS-U1 spindle drive cooled?
A: A forced cooling system using a mounted heatsink blower cools this spindle drive.
Q: What AC source does the KDA 3.2-100-3-DPS-U1 heatsink blower require?
A: The AC source required for the heatsink blower is 115V at 50-60Hz.
Q: How is speed command value input to the KDA 3.2-100-3-DPS-U1 model?
A: This spindle drive accepts digital speed command values using a 16-bit parallel interface.
