This 36 minute education video will walk you through definitions to solutions. Low Voltage drive Senor Application Engineer Jeff Fell discusses what cause harmonics and what kind of problems can they cause? Learn about this important issue and how to solve the problems. Harmonic distortion is measured by applying a spectrally pure sine wave to the amplifier in a defined circuit configuration (i.e., bias conditions, output amplitude or output power level, frequency, etc.) and observing the output spectrum. Harmonics: What are they, why do I care, how do I solve? One method to characterize the linearity of an amplifier is to measure its total harmonic distortion (THD). However, keeping low THD values on a system will further ensure proper operation of equipment and a longer equipment life span. It is important to note that the suggestions and values given in this standard are purely voluntary. The limits on voltage harmonics are thus set at 5% for THD and 3% for any single harmonic. Higher levels of harmonics result in erratic, sometimes subtle, malfunctions of the equipment that can, in some cases, have serious consequences. Computers and allied equipment, such as programmable controllers, frequently require AC sources that have no more than 5% harmonic voltage distortion factor, with the largest single harmonic being no more than 3% of the fundamental voltage.
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