Product Description:

The KDA 1.1-150-3-A00-W1/220 spindle drive is manufactured by Bosch Rexroth Indramat for the KDA Spindle Drives series. It serves as the power interface between a machine control and a spindle motor in metal-cutting and general automation equipment, translating controller reference values into regulated three-phase output. The product maintains motor speed and torque by monitoring current and voltage while relying on its integrated heatsink blower to remove switching losses during operation. As part of a modular multi-axis cabinet, it draws energy from a shared DC bus and returns regenerative power to the same link.

Its bus input is rated at 300 VDC, a level matched to standard Indramat supply modules, and the drive can deliver up to 150 A of continuous output current to the spindle phases. The heatsink blower uses a separate 220 V at 50/60 Hz supply, so cooling performance stays independent of the DC link. The power devices use forced cooling, with air pulled through the fin stack to keep junction temperatures within safe limits during rapid acceleration and sustained spindle operation. Speed reference enters the control electronics through an analog input, permitting straightforward interfacing with legacy CNC controllers and PLC analog outputs.

The cooling assembly directs airflow laterally, and the fan and ducting are supplied as a single mounted heatsink blower so no external ductwork is needed. Reliable operation is permitted at ambient temperatures from 5 to 45 °C, and altitude is limited to 1000 m above sea level to preserve air density for the blower and maintain dielectric spacing. Communication expansion is not provided; the unit carries a no additional interface option designation, and it also omits a secondary encoder channel, making it suitable for systems that already process feedback elsewhere.