Frequency Inverter DF51... - Moeller.com.tr

Appendix04/07 AWB8230-1541GBSine-wave filterU 2Uh200 V/div 1 ms/divFigure 211:Sine-wave filter SFB 400/…Block Transformatoren-Elektronik GmbH &amp; Co. KGFigure 213: Output voltage to motorU 2 : <strong>Inverter</strong> output voltageU~: Sinusoidal voltage to be simulatedPostfach 117027261 VerdenMax-Planck-Strasse 36–46Phone: +49 (0)4231 6780Fax: +49 (0)4231 678177E-mail: info@block-trafo.deInternet: www.block-trafo.defaSine-wave filter SFB filters high-frequency <strong>com</strong>ponents above theset resonance frequency from the frequency inverter outputvoltage (a figure 212). The sine-wave filter’s output voltage(a figure 213) has a sine-wave shape with a low overlaid ripplevoltage. The sine-wave voltage’s total harmonic distortion istypically 5 to 10 %. This significantly reduces the noise generatedby the motor.Advantages of the sine-wave filter:• Long screened motor supply cables possible.– max. 200 m on supply voltages up to 480 V +10 %– max. 400 m on supply voltages up to 240 V +10 %• Extended lifespan like that of a mains-operated motor.• Low noise generation.b05 10 15 20 25 30 35 40 45nFigure 212: High frequency <strong>com</strong>ponents of the output voltagea Without sine-wave filterb With sine-wave filterf: Rotating field frequencyn: Harmonics ordinal224