KDA 3.1-100-3-DQI-W1 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat KDA 3.1-100-3-DQI-W1 spindle drive is part of the KDA Spindle Drives series and features a rated current of 100 Amps. It has a forced cooling system with a mounted heatsink blower using a 220V AC source, and operates within an ambient temperature range of 5 to 45 degrees Celsius. The drive supports digital 16-bit parallel speed command values and provides incremental encoder output.
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Product Description:
The KDA 3.1-100-3-DQI-W1 is a spindle drive developed by Bosch Rexroth Indramat within the KDA Spindle Drives series. Acting as a closed-loop power module, it links machine-tool controllers to high-speed spindle motors by converting a constant DC bus into a modulated three-phase output. Through precise frequency and current regulation, it sustains commanded revolutions, enables rapid acceleration, and maintains torque during heavy milling, grinding, or drilling operations in industrial automation. Closed-loop control also helps the spindle respond smoothly to changing cutting loads during demanding machining cycles.
The drive uses a regulated bus of 300 VDC. Upstream converters must supply a stable source at that level for reliable inverter operation. Under continuous duty, the power stage can deliver 100 A, supporting large synchronous or induction spindles without thermal derating. Speed references arrive through a Digital (16-bit parallel) interface, allowing the controller to transmit RPM commands with fine binary resolution rather than analog scaling. Internal heat generated by switching devices is removed through forced cooling, and airflow is provided by a mounted heat sink blower that directs air across the finned heat plate to keep junction temperatures within safe limits at maximum load.
The blower runs from an auxiliary source of 220 V/50-60 Hz, so cabinet wiring must furnish a single-phase feed that remains active whenever the drive is enabled. Continuous operation is permitted in ambient temperatures from 5 to 45 °C, while elevations up to 1000 m above sea level are acceptable before reduced air density affects cooling performance. These limits support use in standard machine enclosures that provide steady ventilation and a dependable auxiliary supply. For feedback or cascaded control tasks, the unit supplies an incremental encoder output, passing spindle position pulses to PLCs or coordinated axes without additional signal converters. This output can also support external control functions that rely on spindle-related position data during synchronized machine motion.
Frequently Asked Questions about KDA 3.1-100-3-DQI-W1:
Q: What type of cooling system does the KDA 3.1-100-3-DQI-W1 spindle drive use?
A: The KDA 3.1-100-3-DQI-W1 is cooled using a mounted heatsink blower that relies on forced cooling.
Q: What is the rated current of the KDA 3.1-100-3-DQI-W1 spindle drive?
A: This spindle drive is rated for a continuous current of 100 A, supporting demanding motor loads.
Q: What power source does the KDA 3.1-100-3-DQI-W1 heatsink blower use?
A: The heatsink blower for this model requires a 220V AC input at 50-60Hz for operation.
Q: What is the ambient temperature range for safe use of the KDA 3.1-100-3-DQI-W1?
A: Operation is supported in environments with temperatures from 5 to 45 degrees Celsius.
Q: What type of additional interface is available on the KDA 3.1-100-3-DQI-W1?
A: This product features an incremental encoder output as an additional interface.
