KDA 3.1-150-3-LQS-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 3.1-150-3-LQS-W1 is a spindle drive from the KDA Spindle Drives series that features a rated current of 150 Amps and operates at a DC supply voltage of 300 VDC. It offers a forced cooling system with a mounted heatsink blower and supports a speed command value through the SERCOS interface. The drive includes a serial interface RS 232 C and is designed to operate in ambient temperatures from 5 to 45 degrees Celsius.
Internal Product Review
The KDA 3.1-150-3-LQS-W1 spindle drive from Bosch Rexroth Indramat delivers strong performance with a rated current of 150 A and a DC supply voltage of 300 VDC. Its mounted heatsink blower with forced cooling ensures reliable operation in demanding environments. The drive stands out for its advanced serial and SERCOS interface options, making it a versatile solution for high-capacity spindle control.
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Product Description:
The KDA 3.1-150-3-LQS-W1 spindle drive is manufactured by Bosch Rexroth Indramat within the KDA Spindle Drives series. Designed for high-current induction or synchronous spindle motors, the unit converts a fixed DC bus voltage into a variable three-phase output that follows speed commands from a CNC or motion controller. In automated machinery, it regulates spindle torque and speed so machining, grinding, or drilling operations can maintain repeatable surface finish and cycle time. Its role is to keep motor response stable during load changes that occur in cutting applications. The module is intended for installation inside a closed control cabinet with other compatible power units.
During continuous duty, the inverter can deliver a rated output of 150 A, allowing it to handle large-frame spindles without current limiting. The DC bus connection expects 300 VDC, typically supplied by a shared power supply module. A dedicated heat sink blower uses an auxiliary supply of 220 V at 50/60 Hz, so cooling can continue independently of the DC link. Thermal energy is removed by a mounted heat sink blower that provides forced cooling, which helps keep internal components within their permitted temperature range during rapid acceleration and deceleration. This arrangement supports consistent thermal management while the spindle follows changing speed demands.
The drive is suitable for ambient air from 5 to 45 °C, permitting installation on factory floors that are neither refrigerated nor exposed to extreme heat. Installation altitude is limited to 1000 m above sea level; above this height, lower air density can reduce cooling performance and may require derating. For diagnostics and parameter loading, the unit offers a serial interface (RS-232C), allowing direct data exchange with external setup equipment. Real-time speed commands are transmitted through the SERCOS interface, supporting coordinated spindle operation with motion axes and tool-changing sequences. This combination of interfaces allows both local access and synchronized control within the same machine system.
