It consists of a rectifier, DC link capacitor and an inverter. A VFD is an electrical device that controls motors that run in adjustable speeds. The easiest way is by using a variable frequency drive (VFD). Fortunately, there are ways in which a three-phase motor can be “tweaked” to run on a single-phase supply. This creates problems when an application requires a three-phase motor or when only a three-phase motor is available. Unfortunately, most structures are wired on single-phase power.Īlthough more than one phase often supplies a building, only one phase can be used at a time. These motors do not generate vibrations and are less noisy than single-phase motors. They are self-starting as they generate a rotating magnetic field. Three-phase motors typically have over 150% more power than their single-phase counterparts. Fig 1: Parts of a three-phase motor | image: electricalengineeringtoolbox
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