KDA 2.1-150-3-DQI-W1 Bosch Rexroth Indramat
Wake Industrial LLC is not an authorized distributor of this product.
Wake Industrial LLC is not an authorized distributor of this product.
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.
Internal Product Review
The KDA 2.1-150-3-DQI-W1 spindle drive by Bosch Rexroth Indramat features a rated current of 150 A and operates with a 300 VDC supply voltage, making it well-suited for high-power machining applications. A mounted heatsink blower with forced cooling ensures stable operation within ambient temperatures of 5 to 45 degrees Celsius. The integrated incremental encoder output and digital 16-bit parallel speed command input further enhance versatility and precision in demanding environments.
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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.
