LEARN QUALITY VFD PANELS FOR EFFICIENT MOTOR VELOCITY COMMAND IN UAE

As an example, with a normal 480 VAC three-phase enter voltage, the DC bus will keep a charge of about 650 VDC, with precise bus voltage depending on the line voltage level and motor load. The reason the DC bus voltage is increased than the nominal input line voltage is due to root-suggest-squared measurements of AC sine waves (the “peaks” of a