Product Description:

The RZM01.1-6-099 is a three-phase motor filter built by Bosch Rexroth Indramat and placed within the RZM Motor Filters series. The device is installed between a drive and its connected servo motor to attenuate voltage spikes and high-frequency switching harmonics, thereby reducing motor insulation stress and electromagnetic interference in automated production lines. By smoothing the output waveform from pulse-width-modulated inverters, it helps protect nearby control electronics and reduce electrical stress on the motor in packaging machines, conveyors, and assembly stations. This placement also helps limit steep voltage edges at the motor terminals when the drive output is switched rapidly.

This filter is designed for supply systems rated at 3 x AC 380 to 400 V ±15%, so it tolerates moderate line-supply variation without affecting normal operation. Under continuous duty, the unit carries a maximum line current of 99 A, matching medium-power drives used on large servo axes. At the drive’s standard switching frequency of 4 kHz, the filter can operate at its full current rating without derating. Internal copper and core losses total 280 W of heat, which must be removed by cabinet ventilation to keep winding temperature within limits. The unit is intended for use in ventilated enclosures where heat from the magnetic core and windings can dissipate without creating localized hot spots.

In applications where high-speed IGBT drives switch at 8 kHz, the filter’s allowable current falls to 82 A, reflecting the additional losses created by the higher carrier frequency. Hardware option coding shows it is configured as Design 1, a layout that places terminals on the front face for straightforward busbar connection. It also belongs to Line 1, where the inductive cells use a single-stage topology suitable for standard motor-cable lengths. Front-access terminals can also simplify conductor routing in cabinets where the drive and motor connections enter from the same side.