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01 Jun 2021 by Carlo Gavazzi Automation
Industrial electric motors account for roughly 50% of the worldwide power consumption. Worldwide initiatives have been put in place by different countries in relation to the efficiency improvement of electric motors. Higher quality and more efficient motors have the potential to reduce energy use significantly. The challenge with higher efficiency induction motors (IE 3, IE 4 classes) is that of the higher starting current. Such current magnitudes may cause undesirable effects on the voltage network and may also cause protection circuits to trip. This paper covers the various challenges posed by high efficiency motors and how soft starters as well as variable frequency drives can help users overcome such issues.