KDA 3.2-050-3-DQD-U1 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat KDA 3.2-050-3-DQD-U1 is a spindle drive from the KDA Spindle Drives series, featuring a rated current of 50 Amps and a DC supply voltage of 300 VDC. It includes a forced cooling system with a mounted heatsink blower powered by 115V at 50-60Hz and operates within an ambient temperature range of 5 to 45 degrees Celsius. The drive supports digital position and speed command values, with a maximum installation elevation of 1000 meters above sea level.
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Product Description:
The KDA 3.2-050-3-DQD-U1 is a spindle drive manufactured by Bosch Rexroth Indramat and supplied within the KDA Spindle Drives series. Acting as a closed-loop power module, it regulates high-speed motor spindles used in machining centers, grinders, and other automated machines by converting DC bus energy from the supply unit into precisely timed three-phase currents. In an automation cell, the drive accepts digital speed and position references from the CNC controller and adjusts spindle torque and velocity to match the required cutting or finishing process. This arrangement allows the spindle to respond quickly to changing load conditions during acceleration, constant-speed operation, and controlled orientation.
The drive delivers a continuous motor phase current of 50 A from a shared bus voltage of 300 VDC. Thermal stability is supported by a heatsink blower powered from an auxiliary source rated at 115 V/50–60 Hz, allowing the fan to operate independently of the main DC link. Air is moved through the fins by forced cooling, which helps limit semiconductor temperature during extended operation. High-resolution speed regulation is achieved through a 16-bit parallel digital interface, giving the CNC controller fine command resolution without the drift associated with analog references. This control method supports accurate spindle speed changes in applications that require repeatable response during machining cycles.
The cooling assembly uses a mounted heatsink blower, which helps maintain airflow across the power modules while keeping the installation compact. Reliable operation is permitted at ambient temperatures from 5 to 45 °C, and installation is allowed up to 1000 m above sea level without derating. For positioning functions, the control electronics also process a digital position command value, allowing spindle orientation for tool changes or thread-cutting sequences. This combination of cooling support and digital command handling makes the unit suitable for spindle tasks that require both stable speed control and controlled angular positioning.
Frequently Asked Questions about KDA 3.2-050-3-DQD-U1:
Q: What type of cooling does the KDA 3.2-050-3-DQD-U1 spindle drive use?
A: The KDA 3.2-050-3-DQD-U1 spindle drive operates with a forced cooling system using a mounted heatsink blower.
Q: What AC source is needed for the heatsink blower on the KDA 3.2-050-3-DQD-U1?
A: This spindle drive requires a 115V AC source at 50-60Hz for the heatsink blower.
Q: What is the rated current of the KDA 3.2-050-3-DQD-U1 spindle drive?
A: The rated current for the KDA 3.2-050-3-DQD-U1 is 50 A.
Q: What is the required DC supply voltage for the KDA 3.2-050-3-DQD-U1?
A: A DC supply voltage of 300 VDC is required for the KDA 3.2-050-3-DQD-U1 spindle drive.
Q: What type of speed command value input does the KDA 3.2-050-3-DQD-U1 accept?
A: Digital 16-bit parallel speed command values are supported by this spindle drive for precise control.
