Product Description:

Bosch Rexroth Indramat builds the KDA 1.1-100-300-W1-220 as part of the KDA Spindle Drives series. The unit is an inverter-based drive tailored to control machine-tool spindles, converting the DC bus energy of an Indramat supply module into regulated three-phase power for high-speed cutting heads. Within an automation cell, it links CNC commands to the motor windings, allowing speed and torque modulation that matches machining cycles while isolating the motor from line disturbances. This arrangement supports precise spindle control during changing machining loads and helps the CNC maintain stable cutting speed as process demand shifts.

Electrically, the drive handles a rated output current of 100 A, permitting rapid spindle acceleration without saturating the power stage. A shared DC bus delivers 300 VDC, and the internal control circuits draw 160 mA from the 15 V measurement rail while auxiliary logic consumes 1.4 A at 24 V to support feedback processing, fault monitoring, and protective interlocks. Thermal stability comes from forced cooling provided by a cabinet-mounted blower that operates from a 220 VAC supply at 50/60 Hz. Indramat specifies a minimum ground conductor of 10 mm² to keep fault voltages within safety limits, and humidity class F helps varnished components resist moisture during daily temperature changes inside the cabinet.

Mechanical and operating limits determine where the drive can be mounted and how the cabinet should be arranged around it. The housing weighs 17.1 kg, so it requires a rigid panel, and continuous duty is approved between 5 to 45 °C. Operation remains stable up to 1000 m above sea level, and the enclosure carries an IP10 rating, so it must be installed inside a closed electrical cabinet. The model is series 1 and version 1, and blower wiring must follow the stated conductor and voltage requirements.