Product Description:

The RZM01.1-5-008 is a motor-side sine-wave filter in the RZM Motor Filters series manufactured by Bosch Rexroth Indramat. Installed between an inverter and an induction or synchronous motor, it smooths pulse-width-modulated output into a waveform that is much closer to sine. This reduces voltage stress at the motor terminals and can lower audible noise in automation equipment. By rounding the steep voltage edges from the inverter, the filter also helps limit reflected-wave effects that can develop on motor cables. It is intended for applications where cleaner motor voltage is needed without changing the basic drive topology.

The filter is intended for three-phase drives operating on 3 × AC 500 V ±10 %. Under continuous duty, it carries a rated current of 8 A, and its thermal losses can reach 140 W, so enclosure ventilation must remove that heat during operation. The unit uses design code 1, indicating the first mechanical arrangement of this filter type. Its laminated magnetic core and distributed winding capacitance provide the inductive behavior needed to smooth inverter pulses without making the assembly unnecessarily large. This layout supports stable operation on motor circuits where the inverter output would otherwise apply very steep switching transitions to the winding insulation.

When the switching frequency is set to 8 kHz, the allowable RMS load is reduced to 6 A. This reduction helps limit the extra heating that rises with carrier frequency, while lower switching rates permit higher continuous current. The unit is assigned to line 1 and is classified as a Motor Filter, which distinguishes it from mains-side components used for supply conditioning. It is installed on the motor side of the drive system, where dv/dt reduction supports smoother voltage delivery to the connected motor. The stated operating limits should be observed so the filter can maintain its intended electrical performance during continuous service.