KDA 2.1-150-3-DQI-W1 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat KDA 2.1-150-3-DQI-W1 is part of the KDA Spindle Drives series and functions as a spindle drive with a rated current of 150 Amps. It uses a 220V AC heatsink blower for forced cooling and operates at a DC supply voltage of 300 VDC. The unit includes an incremental encoder output and supports digital speed command values in 16-bit parallel format.
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Product Description:
The KDA 2.1-150-3-DQI-W1 spindle drive is produced by Bosch Rexroth Indramat as part of the KDA Spindle Drives series. It functions as the power stage between a CNC controller and a synchronous or induction spindle motor, converting the fixed DC bus voltage from the supply module into a regulated three-phase output. By doing so, it enables precise speed and torque control that is essential for machining centers, lathes, and grinding machines that must maintain stable spindle behavior under variable cutting loads.
This unit can deliver a continuous motor phase current of 150 A, giving it the headroom required for demanding acceleration and deceleration cycles. Internally it is supplied from a DC link held at 300 VDC, so the connected motor receives consistent energy even when the mains fluctuates. Spindle speed is commanded through a digital 16-bit parallel interface, allowing the controller to issue exact setpoints without analog drift. Temperature rise in the power electronics is managed by forced cooling; a dedicated heatsink blower evacuates heat and keeps semiconductor junctions below their thermal limits. Power for that blower is taken from an auxiliary feed of 220 V 50-60 Hz, separating fan operation from the main DC bus and ensuring airflow remains constant during braking events.
The drive is specified for ambient temperatures from 5 to 45 °C, so cabinet air conditioning is only needed in hotter environments. Installation is permitted up to 1000 m above sea level without output derating, matching the elevation limits of most production plants. A built-in diagnostics channel exposes an incremental encoder output; this replica signal can be routed to auxiliary meters or safety relays for overspeed supervision. Mechanical mounting is simplified because the cooling assembly is a single mounted heatsink blower, eliminating the need for external ductwork while keeping the enclosure footprint compact.
Frequently Asked Questions about KDA 2.1-150-3-DQI-W1:
Q: What method is used to cool the KDA 2.1-150-3-DQI-W1 spindle drive?
A: The KDA 2.1-150-3-DQI-W1 spindle drive uses a mounted heatsink blower for cooling.
Q: What is the rated current of the KDA 2.1-150-3-DQI-W1 spindle drive?
A: This spindle drive operates with a rated current of 150 A for demanding spindle applications.
Q: What is the operating ambient temperature range for the KDA 2.1-150-3-DQI-W1?
A: The acceptable ambient temperature range for this model is 5 to 45 degrees Celsius.
Q: What DC supply voltage does the KDA 2.1-150-3-DQI-W1 require?
A: The DC supply voltage requirement for this spindle drive is 300 VDC.
Q: What additional interface does the KDA 2.1-150-3-DQI-W1 provide?
A: It features an incremental encoder output for additional feedback capabilities.
