The aim of new COMBILINE Z2 series output filters is to reduce the EMC load and increase the service life of motors in machines and systems. But there are also other factors since the KEB filters have been designed specifically for use in high speed applications.

Through the interaction of KEB drive controllers and EMC technology, plant and machine builders use the full potential of the drive. Against this background, the Z2 sinusoidal filters are characterised by the fact that a high degree of flexibility is provided by the combination of choke and capacitor.

For the individual combinations, the system is simulated and analysed in advance on the basis of motor, filter and system data. A new tool is also currently under development that will be integrated into KEB’s COMBIVIS Wizard software, which will allow users to specify all the required characteristics for the application so that COMBIVIS parameters for the system are automatically filled in correctly.

The motor is supplied with a sinusoidal voltage, which prevents additional losses due to ripple currents of the drive converter switching frequency in the stator and rotor. The result is reduced heating of the magnets in the rotor and a longer service life of the motor. With the Z2 sinusoidal filters and the standard drive converters from KEB, fast rotating machines up to 100,000 rpm can be operated in the power range from 750W to 450kW. Last but not least, motor noise is reduced and the EMC behaviour of the overall drive is improved by the filters. Therefore, the sinusoidal filters, designed with a low-loss core material and a particularly high efficiency, are designed as “high speed filters” that significantly reduce losses in the motor.

KEB