KDA 3.1-150-3-LQS-W1 Bosch Rexroth Indramat
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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.
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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.
Frequently Asked Questions about KDA 3.1-150-3-LQS-W1:
Q: What cooling system does the KDA 3.1-150-3-LQS-W1 spindle drive use?
A: The KDA 3.1-150-3-LQS-W1 spindle drive is equipped with a mounted heatsink blower for effective cooling.
Q: What is the rated current for the KDA 3.1-150-3-LQS-W1 spindle drive?
A: This spindle drive operates with a rated current of 150 A for delivering high output power.
Q: What is the required DC supply voltage for the KDA 3.1-150-3-LQS-W1?
A: The KDA 3.1-150-3-LQS-W1 accepts a DC supply voltage of 300 VDC for its operation.
Q: What AC source powers the heatsink blower on the KDA 3.1-150-3-LQS-W1?
A: The blower for the KDA 3.1-150-3-LQS-W1 operates on a 220V AC source at 50 to 60 Hz.
Q: What is the allowable ambient temperature range for the KDA 3.1-150-3-LQS-W1 spindle drive?
A: The ambient temperature range for this spindle drive is 5 to 45 degrees Celsius.
