KDA 3.1-100-3-DQS-W1 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat KDA 3.1-100-3-DQS-W1 is a spindle drive from the KDA Spindle Drives series. It supports a rated current of 100 Amps and runs on a DC supply voltage of 300 VDC, with cooling provided by a mounted heatsink blower using forced cooling. The drive includes a serial RS 232 C interface and accepts digital speed commands.
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Product Description:
The KDA 3.1-100-3-DQS-W1 spindle drive belongs to the KDA Spindle Drives series from Bosch Rexroth Indramat. It is intended for machine-tool spindles that require precise speed regulation across a wide operating range, including cutting, drilling, and other high-speed machining tasks. By converting a fixed DC link into a variable three-phase output, the unit serves as the power stage between the main supply and the spindle motor. This arrangement allows the higher-level controller to send exact velocity commands while the drive manages current, voltage, and internal temperature during changing load conditions. Stable regulation is important when spindle speed must remain consistent as tool engagement and material load vary.
Heat generated by the power electronics is removed by a mounted heat sink blower that directs airflow across the aluminum fins. The cooling system uses forced cooling, so airflow remains active during sustained spindle operation and rapid load changes. Continuous airflow also helps protect switching components from heat buildup during repeated acceleration and deceleration cycles. Fan power comes from an auxiliary supply rated at 220 V/50–60 Hz, which keeps the cooling circuit separate from the main power section. The inverter receives a stabilized link of 300 VDC and converts it into a programmable three-phase output that follows the commanded speed. Under rated conditions, the drive can supply up to 100 A of phase current to support demanding spindle loads.
The drive operates at ambient temperatures from 5 to 45 °C, making it suitable for typical enclosed industrial installations. It can be mounted at elevations up to 1000 m above sea level, where the cooling airflow still provides the intended heat removal. A serial RS-232C interface provides direct access for parameter settings and fault logging without requiring an additional communication module. Real-time speed commands are received through a 16-bit parallel digital input, which gives the controller fine command resolution for accurate spindle speed matching during different machining operations. This helps the CNC maintain repeatable surface finish and process timing when spindle speed must track programmed setpoints closely.
Frequently Asked Questions about KDA 3.1-100-3-DQS-W1:
Q: What is the rated current for the KDA 3.1-100-3-DQS-W1 spindle drive?
A: The KDA 3.1-100-3-DQS-W1 spindle drive operates with a rated current of 100 A.
Q: How is the KDA 3.1-100-3-DQS-W1 spindle drive cooled?
A: This model uses a mounted heatsink blower for forced cooling to manage heat.
Q: What AC source is needed for the heatsink blower of the KDA 3.1-100-3-DQS-W1?
A: The AC source required for the heatsink blower on this drive is 220V at 50-60Hz.
Q: How does the KDA 3.1-100-3-DQS-W1 receive speed command values?
A: The KDA 3.1-100-3-DQS-W1 accepts digital speed command values through a 16-bit parallel interface.
Q: What type of additional interface is available on the KDA 3.1-100-3-DQS-W1 spindle drive?
A: A serial interface (RS 232 C) is included on this model for additional connectivity.
