Three Phase Variable Speed Drive (VSD) Complete Guide 2025: Working Principle, Benefits & Applications
Introduction to Three Phase Variable Speed Drives A three phase variable speed drive (VSD), also commonly referred to as a variable frequency drive (VFD) or adjustable frequency drive (AFD), is a sophisticated electronic device that controls the speed of three-phase AC motors by precisely regulating the frequency and voltage of the power supplied to them. These advanced control systems have become essential components in modern industrial automation, HVAC systems, water treatment facilities, and various other applications where precise motor control and energy efficiency are critical.
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