Product Description:

Bosch Rexroth Indramat builds the KDA 3.2-100-3-AYS-W1 as part of its KDA Spindle Drives series. Classified as a spindle drive, it regenerates DC bus energy into a controlled three-phase output so machine tool spindles can accelerate, brake, and hold speed precisely during automated milling, drilling, or grinding operations. Stable spindle control is important in these applications because it helps maintain consistent cutting performance as the load changes. The unit is series 3 and version 2, and it fits into Indramat modular drive racks while linking to CNC controllers that supervise coordinated motion.

A regulated DC link of 300 VDC feeds the IGBT output stage, which is rated for a continuous spindle current of 100 A. Heat generated by those switching devices is removed by a mounted heat sink blower supplied from a separate 220 V at 50/60 Hz line, preventing thermal derating during long duty cycles. Command inputs use an analog speed reference, allowing straightforward connection to velocity channels on conventional or digital CNCs. For setup, trace capture, and parameter uploads, the unit provides a serial interface (RS-232C). Feedback flexibility is extended by a second encoder input that can accept synchronous position data from a spindle-mounted sensor, enabling dual-loop control when tighter speed regulation or position tracking is needed.

The drive is intended for ambient temperatures between 5 to 45 °C and for installations up to 1000 m above sea level without extra cooling equipment. Within these limits, the integral blower and its forced cooling system keep internal temperatures under control even when cabinet airflow is restricted. These operating conditions should be observed so the power section can remain stable during prolonged spindle duty. The stated limits apply to normal installation environments inside electrical enclosures used on machining equipment.