KDA 3.1-100-3-DPI-U1 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat KDA 3.1-100-3-DPI-U1 is part of the KDA Spindle Drives series and is designed as a spindle drive with forced cooling via a mounted heatsink blower. The drive operates at a rated current of 100 Amps and is powered by a 300 VDC supply voltage. It supports an incremental encoder output and features a second encoder input for spindle or additional motor feedback.
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Product Description:
The KDA 3.1-100-3-DPI-U1 spindle drive is produced by Bosch Rexroth Indramat within the KDA Spindle Drives series. It converts the common direct-current link of a modular drive system into controlled three-phase output for high-speed machine-tool spindles and regulates torque through closed-loop feedback. In an automation cell, the unit functions as the axis power stage, matching the motion controller and protecting the motor through integrated monitoring circuits. This operating role makes it suitable for spindle applications that need stable speed, rapid response to load changes, and dependable control during repeated machining cycles.
The drive is supplied from a regulated bus at 300 VDC and can deliver a continuous armature current of 100 A to the spindle motor, so fusing and cabling must follow high-current practices. Thermal energy is removed by a mounted heat sink blower, and airflow is produced by an auxiliary fan that operates on 115 V/50-60 Hz. This arrangement uses forced cooling, allowing the electronics to maintain rated output even when the converter cabinet is densely packed with other modules. The blower-assisted airflow supports continuous spindle operation during extended processing periods. The series designation indicates revision 3 for the drive.
The drive can operate in ambient temperatures from 5 to 45 °C, and installation is permitted up to 1000 m above sea level without derating. Speed reference arrives as a 16-bit parallel digital signal, giving the controller fine resolution when synchronizing spindle speed with feed axes. For position or speed feedback, the front panel provides a second encoder socket that accepts spindle-mounted sensors or additional motor encoders. An auxiliary channel also provides an incremental encoder output for downstream PLCs or display devices. Separate reference and feedback paths allow the control system to process command and monitoring signals at the same time.
Frequently Asked Questions about KDA 3.1-100-3-DPI-U1:
Q: What is the rated current capability of the KDA 3.1-100-3-DPI-U1 spindle drive?
A: This model supports a rated current of 100 A for spindle operations.
Q: How is the KDA 3.1-100-3-DPI-U1 spindle drive cooled during operation?
A: Cooling is achieved with a mounted heatsink blower that uses forced cooling.
Q: What DC supply voltage does the KDA 3.1-100-3-DPI-U1 require?
A: The KDA 3.1-100-3-DPI-U1 can accept a DC supply voltage of 300 VDC.
Q: What additional interface is provided on the KDA 3.1-100-3-DPI-U1 spindle drive?
A: The spindle drive includes an incremental encoder output as an additional interface.
Q: What is the approved ambient temperature range for the KDA 3.1-100-3-DPI-U1?
A: This model supports operation in ambient temperatures between 5 and 45 degrees Celsius.
