KDA 3.1-150-3-D0I-U1 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat KDA 3.1-150-3-D0I-U1 is a spindle drive from the KDA Spindle Drives series. It features a rated current of 150 Amps and operates with a 300 VDC supply voltage. The unit uses forced cooling through a mounted heatsink blower, and is equipped with a digital 16 bit parallel speed command value interface.
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Product Description:
The KDA 3.1-150-3-D0I-U1 spindle drive is manufactured by Bosch Rexroth Indramat and belongs to the KDA Spindle Drives series. It works as a power stage in modular machine-tool cabinets, converting cabinet bus power into controlled three-phase output for high-speed spindle motors. Through the series-standard parallel velocity port, it exchanges setpoints and feedback with upper-level numerical controllers for accurate speed regulation in milling, drilling, and grinding applications. This arrangement lets the cabinet share a common power source across multiple axes while the drive concentrates on spindle current and speed control.
The drive is supplied from a common bus at 300 VDC and can deliver a continuous output of 150 A, providing the current needed for rapid acceleration and heavy material removal. Thermal energy is removed by a mounted heat sink blower that uses forced cooling, so airflow remains consistent even when the cabinet enclosure restricts passive ventilation. The blower is powered by an auxiliary line rated at 115 V/50–60 Hz, which keeps the fan supply separate from the high-power section. This cooling arrangement supports sustained torque output during long machining cycles and helps maintain stable internal operating conditions.
The permissible ambient range is 5 to 45 °C, and installation is approved up to 1000 m above sea level without additional cooling equipment. Velocity reference data arrive through a 16-bit parallel digital interface, allowing fine speed adjustments within a single command cycle and clear coordination with CNC commands. For position referencing, the drive retransmits an incremental encoder output. This interface layout keeps speed command handling separate from the returned position signal, which simplifies coordination with external control hardware during spindle operation.
Frequently Asked Questions about KDA 3.1-150-3-D0I-U1:
Q: What is the rated current for the KDA 3.1-150-3-D0I-U1 spindle drive?
A: The KDA 3.1-150-3-D0I-U1 spindle drive is rated for a current of 150 A, allowing for high-power spindle operations.
Q: How is the KDA 3.1-150-3-D0I-U1 spindle drive cooled?
A: This drive is equipped with a forced cooling system that includes a mounted heatsink blower.
Q: What is the required DC supply voltage for the KDA 3.1-150-3-D0I-U1 spindle drive?
A: The KDA 3.1-150-3-D0I-U1 operates with a DC supply voltage of 300 VDC.
Q: What type of speed command value does the KDA 3.1-150-3-D0I-U1 spindle drive accept?
A: Speed command input on this drive is digital and uses a 16-bit parallel value format.
Q: Does the KDA 3.1-150-3-D0I-U1 spindle drive have a second encoder input?
A: There is an incremental encoder output provided, but no second encoder input is included on this drive.
