Does a Sine Wave Filter Affect Torque Measurement on Altivar Drives?
Resolution:
No. Installing a sine wave filter between the drive and the motor does not negatively affect the drive's torque measurement. In many cases, it can actually improve measurement accuracy.
A sine wave filter smooths the drive output current, producing a waveform that is closer to a true sinusoidal signal. Without a sine wave filter, the output current contains switching peaks and harmonics that can reduce current measurement accuracy.
Since motor torque is directly proportional to motor current (Torque ∝ Current), a cleaner current waveform can result in a more accurate torque calculation.
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Frequently Asked Questions - Schneider Electric (se.com)
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