Product Description:

The HMF01.1N-N0K2-D0230-A-500-NNNN motor-side filter is produced by Bosch Rexroth Indramat as part of the HMF Motor Filters series. It is installed between an inverter and a synchronous or induction motor to moderate steep voltage edges, extend insulation life, and minimize bearing currents in industrial automation drives. The component also fits standardized cabinet layouts used in modular servo systems, and its compact busbar connection helps keep power wiring organized in high-current applications. This placement lets the filter act directly on the waveform leaving the drive before the voltage reaches the motor terminals.

It carries a continuous line current of 230 A, so it can be paired with large servo axes without derating. The permissible supply network for the filter is 3 × 500 VAC, and when connected at this level the inductor-capacitor stage restricts the peak phase-to-phase voltage to 1000 V. The internal limiter shapes the voltage edge to less than 1 kV/µs, which helps protect motor windings from partial discharge and reduces electrical stress on connected cable runs. For compatibility with high-speed PWM, the design supports up to 4 kHz switching frequency while still holding insertion loss within expected operating limits. A molded housing certified to IP10 offers basic touch protection once the unit is locked into the cabinet busbar system.

The filter is a dv/dt filter with limiter, making it a suitable match for converters such as HCS03 and HCS04. In these drive chains it maintains sinusoidal motor voltage up to a fundamental output frequency of 200 Hz, so high-speed spindle or positioning motors can run with lower acoustic noise and reduced electrical stress at the motor connection. Proper operation depends on installing the device in a vertical orientation to support natural convection across the laminated core and keep thermal resistance within the intended range. This arrangement also helps the filter dissipate heat without requiring additional active cooling hardware.