Product Description:

The KDA 3.2-050-3-DQ0-W1 is a spindle drive module built by Bosch Rexroth Indramat within the KDA Spindle Drives series. The unit converts a fixed DC link into three-phase output for precise speed control of machine-tool spindles used in automated production lines. Integrated logic coordinates with the associated CNC controller so the drive accelerates, holds speed, or decelerates the spindle according to program demands without mechanical gear changes. It is intended for spindle axes that need repeatable speed changes across varying process loads.

The power section is supplied from a DC bus at 300 VDC, and the converter can deliver a continuous phase current of 50 A; together these values indicate the sustained electrical capability available to the coupled spindle motor during machining. A dedicated auxiliary input rated at 220 V/50-60 Hz powers the cooling blower that removes switching and copper losses from the heat sink assembly. Because the cooling method is forced cooling, thermal stability is maintained even when cabinet airflow is limited. The unit uses a mounted heat sink blower, so no external ducting is required and the semiconductors can remain within their normal operating temperature range during prolonged high-load cycles.

Acceptable site conditions span an ambient range of 5 to 45 °C, and operation is permitted up to 1000 m above sea level before output derating is required, which matches typical shop-floor elevations. Speed reference data reaches the control electronics as a 16-bit digital parallel word, letting the CNC issue precise velocity commands without analog drift. Communication expansion is not provided because of the lack of an additional interface option, so integration focuses on the standard KDA bus connectors. The 3.2 designation identifies the third series and second version of the module, placing it in a later design revision of the platform.