Sine wave filters are dU/dt filters which reduce the dU/dt values on the motor terminal phase-to-phase voltage. This improves phase-to-phase voltage ensuring its correct sinusoidal signal. The unwanted phenomena such as bearing currents or pulse voltage negative impact on the motor’s winding insulation are minimised, particularly for motors over 50kW.
Prevent disturbing pulses
The motor voltage sinusoidal signal reduces hysteresis motor heat losses and thus, the motor’s temperature increases. The temperature has a significant influence on the service life and durability of the motor’s insulation. In this way, the sinusoidal filters extend the motor’s service life. As mentioned previously, the motor voltage sinusoidal signal reduces bearing currents. In this way, the sinusoidal filter significantly reduces the damage caused to the bearings, extending the motor’s service life and intervals between maintenances.
Features and advantages
Quality and performance
Protects the motor against dU/dt stress which prolongs the service life and increases the motor’s efficiency. The enclosures are specially designed and made to match the frequency converters from the FC series not only due to their design but also quality and functionality.