Product Description:

The KMS02.1B-A018-P-D7-ET-ENH-NN-NN-FW near-motor servo drive is built by Bosch Rexroth Indramat for the KMS Electronic Drives series. Positioned directly on the machine frame, it feeds a compact servo motor with conditioned three-phase power derived from a shared DC link. By relocating the power electronics to the axis, the device shortens motor cables and supports decentralized automation tasks that demand tight velocity and torque control. Because the drive is installed close to the motor, the layout can also help reduce electrical stress on long motor leads in distributed machine designs.

The unit taps a common bus that can reach 750 V DC, and from this source the inverter delivers phase voltage at a fixed ratio to the link. A rated input current of 7.3 A matches cabinet supply wiring, while motion peaks are handled by a maximum phase current of 18 A. Thermal management is passive because the housing uses natural convection, so no fans or filters are required. The housing has an IP65 rating that prevents dust ingress and resists water jets, allowing the drive to be mounted in washdown areas. For control integration, its Multi-Ethernet master interface exchanges cyclic setpoints, and a dedicated Hiperface port closes the feedback loop with the motor encoder. This arrangement keeps the shared DC bus in the cabinet while placing the axis electronics near the driven load.

DC-link storage is provided by an internal capacitor bank rated at 0.02 mF, supplemented by 118 + 100 nF that references switching transients to the housing. This internal capacitance helps stabilize the link during rapid load changes and switching events. During regenerative braking, the electronics dissipate up to 50.00 W, a heat load compatible with passive cooling. The aluminum enclosure weighs 2.50 kg, which limits the added mass when the drive is mounted on moving machine axes. A commanded voltage slew rate of 5.00 kV/µs lets the inverter maintain fast current control while staying within insulation limits. For fault tolerance, the power stage can withstand a short-circuit current of 42000 A rms, allowing upstream protective devices time to clear severe electrical faults.