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What Filters Are Used For The Vfd? |
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Answer» Line-side filters are sometimes INSTALLED to reduce EMI, although modern PWM drives are much less likely to generate significant noise. On the load side, output chokes can be installed to reduce drive generated HARMONICS in the motor leads. MANY drives have some output filtration ALREADY installed and harmonics are generally not a PROBLEM as long as wiring is correctly segregated, properly grounded, and the motor leads are not excessively long (typically less than 100 meters). Line-side filters are sometimes installed to reduce EMI, although modern PWM drives are much less likely to generate significant noise. On the load side, output chokes can be installed to reduce drive generated harmonics in the motor leads. Many drives have some output filtration already installed and harmonics are generally not a problem as long as wiring is correctly segregated, properly grounded, and the motor leads are not excessively long (typically less than 100 meters). |
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