Product Description:

The HMF01.1N-S0K1-M0600-N-480-NNNN is a motor output filter produced by Bosch Rexroth Indramat and assigned to the HMF Motor Filters series. Installed between a servo drive and an induction or synchronous motor, the filter shapes the pulse-width-modulated output into a near-sinusoidal voltage, reducing dV/dt stress on insulation and limiting electromagnetic interference in automated machinery. Its design allows free installation inside a cabinet with forced convection, and surrounding air is the only cooling medium required to dissipate the thermal losses generated during continuous service.

The unit is classified as a sinusoidal filter, meaning its inductance and capacitance are tuned to deliver low-harmonic motor voltage at up to 3 × AC 480 V. Within that supply range, it carries a continuous phase current of 600 A, so it can be paired with high-power axes without saturation. The filter preserves motor torque control up to a fundamental frequency of 100 Hz, matching the speed range offered by most Rexroth inverters. To protect windings, its output never exceeds a crest value of 1000 V, and the rate of voltage change is limited to 1 kV/µs. Free-installation brackets simplify positioning, and natural airflow around the heat sinks maintains operating temperature when cabinet ventilation is present.

The electrical elements are sized for ambient conditions up to 60 °C; above this point, derating is required to prevent core saturation. During short production surges, the filter tolerates an overload of 150% for 60 s and a brief spike of 165% for 2 s, giving the drive time to clear acceleration peaks without tripping. Because the unit has an IP00 protection class, all live parts must be housed inside a grounded enclosure, especially when the installation site is at the permitted altitude of 3000 m, where air density drops and convective cooling efficiency falls.