Variable speed drive (VSD) can provide reliable dynamic systems and essential savings in energy usage and costs of the electrical motors. A variable speed drive (VSD) is a device that regulates the rotational force and speed of mechanical equipment. VSDs are effective in energy savers in fan and pump applications; they strengthen process operations, especially where flow control is involved. VSDs provide accurate soft-start capabilities, which decrease line voltage sags and electrical stresses associated with complete voltage motor start-ups, particularly when driving high-inertia loads. Variable speed drive technology and the significance of controlling the speed of existing electrical motors have attracted many attentions in the recent years with the advent of new magnetic materials and power devices. Thus, this paper highlights a comprehensive review on applications of VSD in electrical motors energy savings and energy use. The purpose is to identify incorporated costs of applying variable speed drives and energy saving opportunities to the existing applications of electrical motors. Author hopes to provide convenient information for future variable speed drive applications like pumps, chillers, fans, heaters and ventilators.

Full text: IJEIR-1478_Final.pdf