KDF 1.1-100-300-W1-220 Rexroth AC Spindle Drive

The Bosch / Rexroth / Indramat KDA/CDM Series AC Spindle Drives are a high performance asynchronous AC motor speed regulator capable of operating motors up to about 25 hp (kw). Unrestricted four-quadrant operation, as well as positioning, is possible with the AC Spindle Drive. Speed range is from 0 to 8000 RPM. the AC Spindle is provided with one of the following interfaces, allowing operation by any control system:
• Differential Analog Command Input
• 16 bit Parallel Digital Command Input

Speed control is highly accurate, benefiting from a microprocessor based digital velocity loop, rather than conventional variable frequency control. When the digital velocity command is employed, no drift is present. Use of the analog velocity command reduces the precision of the speed control proportional to the analog tolerance, and drift may be present. At zero speed, considerable stiffness is present. The motor will resist any attempt to change its speed thru load variation providing up to the peak system torque, if required.

The control principle used provides the highest stiffness and stability known for standard induction motors. The system is well suited for spindle velocity control but does not approach the stiffness and stability know from Bosch / Rexroth / Indramat KDA/CDM Series AC Spindle Drives. Speeds may be utilized dow to zero RPM, but the lowest usable speed depends ultimately upon the load variation present.

The AC Spindle Drive has been designed so that it may be operated along with Bosch / Rexroth / Indramat's modular AC servo controllers, sharing a common power supply. This allows a complete brushless machine to be constructed at a very reasonable price.