KDA 3.1-150-3-DPD-W1 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat KDA 3.1-150-3-DPD-W1 is a spindle drive from the KDA Spindle Drives series. This drive operates with a rated current of 150 Amps and a DC supply voltage of 300 VDC. It features forced cooling via a mounted heatsink blower and supports digital position and speed command values.
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Product Description:
Bosch Rexroth Indramat's KDA 3.1-150-3-DPD-W1 belongs to the KDA Spindle Drives series and is designed to energize and regulate machine-tool spindles in CNC cells and other automated cutting equipment. As a spindle drive, it converts the constant DC link voltage delivered by the power supply into variable three-phase output while monitoring load and velocity, so the machining process remains precise even during rapid speed changes. That control behavior supports stable spindle response during cutting, speed ramping, and controlled deceleration between machining steps. It also serves as the electronic link between the machine power supply, the spindle motor, and the CNC command structure.
The drive draws its intermediate energy from a regulated bus at 300 VDC, and its output section is rated for 150 A of continuous motor current, giving it the headroom needed to start and decelerate large-inertia spindles without current foldback. Thermal stability is sustained by a mounted heat sink blower; the fan receives power from an auxiliary line of 220 V/50-60 Hz, so spindle load does not influence cooling effectiveness. The housing uses forced cooling, which keeps internal semiconductor temperatures within their safe operating window during prolonged high-power cycles. Digital diagnostics travel through the series 3 backplane, and a dedicated position command value port accepts numerical setpoints from the CNC for fine positioning. This allows one unit to handle both power conversion and command tracking in applications that require accurate spindle speed control.
The unit is intended to operate in rooms kept between 5 and 45 °C, and it may be installed up to 1,000 m above sea level without current or voltage derating. For velocity regulation, the controller receives a 16-bit parallel speed command that provides granular resolution across the spindle's usable speed range, which helps the control system apply small command changes smoothly. Incremental or absolute motion feedback can also be routed through the second encoder input when an auxiliary motor or a high-precision spindle sensor is present. This is useful on spindles that incorporate secondary sensing for orientation or auxiliary drive elements.
Frequently Asked Questions about KDA 3.1-150-3-DPD-W1:
Q: What is the required DC supply voltage for the KDA 3.1-150-3-DPD-W1 spindle drive?
A: The KDA 3.1-150-3-DPD-W1 spindle drive operates with a DC supply voltage of 300 VDC.
Q: What type of position command value interface does the KDA 3.1-150-3-DPD-W1 support?
A: This model supports digital position command value input for precise spindle control.
Q: What is the rated current output of the KDA 3.1-150-3-DPD-W1 spindle drive?
A: The spindle drive provides a maximum rated current of 150 A.
Q: What cooling method is used for the KDA 3.1-150-3-DPD-W1 spindle drive?
A: The KDA 3.1-150-3-DPD-W1 is equipped with a mounted heatsink blower for forced cooling.
Q: What is the permissible ambient temperature range for the KDA 3.1-150-3-DPD-W1 during use?
A: Operation is supported within ambient temperatures from 5 to 45 degrees Celsius.
