Product Description:

Bosch Rexroth Indramat builds the KDA 3.2-100-3-DY0-W1 for machine-tool applications that need direct spindle regulation. Part of the KDA Spindle Drives series, this drive converts a constant intermediate-circuit voltage into three-phase output for high-speed motor operation. In an automation cell, it provides closed-loop speed and torque control so the spindle follows controller commands during cutting, drilling, or grinding cycles. It is intended for spindle axes that must accelerate smoothly, hold commanded speed under varying cut conditions, and respond quickly to control changes.

The power section is supplied from a 300 VDC link and can deliver up to 100 A of continuous current to the motor. This current capacity supports sustained spindle duty in demanding machine cycles. Heat produced by switching elements is removed by a heat sink that relies on forced cooling; the integral blower receives 220 V AC at 50–60 Hz. Forced airflow moves heat away from the power section so switching components can remain within their normal operating range during continuous use. Reliable service is specified for ambient conditions from 5 to 45 °C, and installation is permitted up to 1000 m above sea level.

The velocity loop accepts a digital 16-bit parallel command, so the numerical control can send high-resolution setpoints without analog drift. The digital command path also avoids the drift and noise sensitivity associated with analog setpoint transmission in long cable runs. A dedicated channel marked as the second encoder input reads synchronous feedback from the spindle sensor, enabling position-related functions such as rigid tapping or spindle orientation without extra motion modules. The unit uses a fixed interface set and belongs to Series 3, which corresponds to revision 2 in the part number.