Product Description:

The HMF01.1A-N0K2-D0073-A-500-NNNN is a motor filter manufactured by Bosch Rexroth Indramat and supplied within the HMF Motor Filters series. The device is installed between an HCS drive inverter and its connected servo motor, where it shapes the pulse-width-modulated output so that voltage stress on motor insulation and attached cabling is reduced. By limiting steep voltage edges and suppressing common-mode currents, the filter protects motors used in large automation cells with long cable runs and high switching frequencies.

The filter is matched to a continuous load of 73 A, allowing it to handle the steady RMS phase current supplied by the inverter without overheating. Its design corresponds to a motor rated at 30 kW, while the associated DC bus can deliver up to 43 kW of continuous power. For installations where the drive is several rooms away from the actuator, a maximum lead length of 200 m is accepted, provided the rate of voltage rise at the motor terminals remains below < 5 kV/µs. Within those limits, the filter keeps reflected wave amplitudes low and helps avoid partial discharge inside the stator windings.

For dynamic events such as rapid acceleration, the unit accommodates the assigned drive type HCS03.1E-W0100, which can momentarily raise phase current to 100 A. Under this short-term loading, the filter passes a peak DC bus power of 59 kW without saturation, maintaining the same attenuation profile seen at nominal load. The allowable crest voltage at the motor end is constrained to < 1500 V, preventing insulation breakdown when cable impedance and inverter switching overlap. By positioning the filter directly at the motor output of HCS drives, the installation can use longer cable runs while keeping electromagnetic interference and voltage stress within the stated limits.