Product Description:

The HMF01.1N-N0K2-M0012-A-500-NNNN is a motor-side filter produced by Bosch Rexroth Indramat for the HMF Motor Filters series. Positioned between an IndraDrive power stage and its synchronous motor, the unit limits dv/dt and lowers common-mode disturbances to help protect winding insulation in automated machining centers and material-handling lines. Its compact housing, which is 92 mm deep, 155 mm wide, and 162 mm high, fits beside other cabinet components and connects with 14 AWG conductors routed to the drive output terminals. This placement allows the filter to condition the inverter output before the voltage reaches the motor, which helps reduce electrical stress during continuous operation.

The filter carries a continuous output capability of 12 A, allowing it to handle the steady-state current drawn by midsize servo axes. Three inductors rated at 3 × 900 µH form the core of the network, and this inductance smooths the pulse-width-modulated voltage produced by inverters that switch at selectable 4, 8, 12, or 16 kHz. To guard motor insulation, the slope of each phase voltage is held below <1 kV/µs. Internal copper losses and core heating are limited to a power dissipation of 25 W, so the device can be mounted in enclosures where airflow is restricted. Installation requires only 14 AWG wiring and standard M4 terminal screws, which keeps the connection layout simple and easy to read.

For short-term accelerations or regenerative events, the filter tolerates a peak load of 28 A, so transient currents are less likely to saturate its magnetic elements. It supports inverter output frequencies up to 200 Hz, which covers high-speed spindle and linear motor applications without adding excessive impedance to the motor circuit. An insulation resistance of 600 MΩ indicates that the winding-to-ground path remains highly resistive, helping maintain low leakage current over prolonged service life. The assembly weighs 5.1 kg, which gives the unit a rigid mechanical form for cabinet mounting. This balance of electrical filtering and compact construction suits drive systems that need cleaner motor-side waveforms in a limited installation space.