Product Description:

The KDA 3.2-100-3-DQ0-W1 is a spindle drive module manufactured by Bosch Rexroth Indramat for the KDA Spindle Drives series. It is used in machining centers and other CNC equipment, where it converts regulated DC-bus energy into variable three-phase power for high-speed spindle motors. The series 3 platform includes version 2 diagnostic and fault-handling updates, helping the unit follow programmed torque and speed profiles during cutting, drilling, and grinding operations. It can be paired with spindle motors that need repeatable acceleration and stable running speed during automated cycles.

The drive operates from a DC link of 300 VDC, which sets the available inverter supply for the motor. It can deliver a continuous phase current of 100 A, allowing it to control large asynchronous or synchronous spindles. Speed commands are received through a 16-bit parallel digital input, which provides fine command resolution for closed-loop control. This input structure supports accurate transfer of command values from the CNC. Thermal energy is removed by a heat sink-mounted blower that provides forced cooling to keep the power semiconductors within their intended temperature range. The blower uses an auxiliary supply of 220 V, 50 to 60 Hz, so it can run from a common single-phase source inside the cabinet.

The unit is intended for ambient temperatures from 5 to 45 °C, and operation outside that range requires derating or climate control. This matters in enclosed cabinets, where internal air temperature can rise above the surrounding room temperature. Full current output is supported up to 1000 m above sea level; above that altitude, lower air density reduces cooling effectiveness. The drive has no additional interface option, so field wiring is limited to the standard command bus and power terminals.