KDA 3.1-100-3-DPI-W1 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat KDA 3.1-100-3-DPI-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 via a mounted heatsink blower and supports a digital 16-bit parallel speed command value. The drive includes an incremental encoder output and a secondary encoder input for spindle or motor feedback.
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Product Description:
The KDA 3.1-100-3-DPI-W1 is a spindle drive produced by Bosch Rexroth Indramat for the KDA Spindle Drives series. The module forms the power stage between a regulated DC bus and a high-speed AC spindle motor, enabling CNC and grinding machines to execute accurate cutting, drilling, or finishing cycles. By generating a programmable three-phase output, it supports closed-loop speed and position control required in industrial automation cells. This arrangement lets the drive respond quickly to commanded speed changes while maintaining stable spindle operation during precision machining.
Internally, the power electronics operate from a DC link of 300 VDC, and the output stage furnishes up to 100 A of armature current to the spindle windings. Thermal stability is supported by a blower that uses 220 V at 50–60 Hz single-phase utility power. Air moves across a mounted heat-sink blower assembly, and the unit uses forced cooling so continuous operation at rated current is possible. Within an ambient temperature range of 5 to 45 °C, the drive maintains its current limit and switching frequency. Installation above this temperature range may require external cabinet ventilation or current derating. The power stage is intended for spindle duty where sustained current and reliable heat removal are necessary for repeatable machining performance.
The unit can be mounted up to 1000 m above sea level without adjustment, allowing use in elevated production areas. A digital control board reads a spindle speed word presented as a 16-bit digital parallel value, which gives fine command resolution across the available speed range. For position synchronization, a secondary encoder socket accepts resolver or TTL feedback, and an auxiliary channel provides an incremental encoder output to the CNC for coordinated motion. This combination of command and feedback connections helps the drive exchange motion data directly with the surrounding control system. It also supports spindle control alongside other machine axes without requiring a separate feedback converter.
Frequently Asked Questions about KDA 3.1-100-3-DPI-W1:
Q: What is the rated current specification of the KDA 3.1-100-3-DPI-W1 spindle drive?
A: The KDA 3.1-100-3-DPI-W1 has a rated current of 100 A, allowing it to handle high power requirements for spindle motors.
Q: What is the required DC supply voltage for the KDA 3.1-100-3-DPI-W1?
A: This model requires a DC supply voltage of 300 VDC for operation.
Q: What type of cooling method does the KDA 3.1-100-3-DPI-W1 use?
A: The KDA 3.1-100-3-DPI-W1 utilizes a forced cooling system with a mounted heatsink blower.
Q: Does the KDA 3.1-100-3-DPI-W1 have a second encoder input for feedback?
A: A second encoder input is present for spindle feedback or additional motor feedback.
Q: What ambient temperature range is supported by the KDA 3.1-100-3-DPI-W1?
A: The ambient operating temperature range for this unit is 5 to 45 degrees Celsius.
