PM motors are suitable for nearly all applications, like pumps, elevators, compressors, blowers, extruders, generators, electric vehicles, servodrives, cooling towers, household appliances, etc. This paper will present some applications where the use of PM motors allowed for enhancements in energy efficiency and process quality.
Introduction
According to recent studies [1], electric motor-driven systems (EMDS) account for between 43% and 46% of all global electricity consumption. Induction motors have been the most used drives in industry, due to its robustness, reliability and simple operation (direct connection to the mains, without electronic control). However, in many applications variable-speed drives offer significant energy saving potential [2]. In this scenario, permanent magnet motors are competing technologies for the induction motors, because they present higher efficiency and do not need forced ventilation neither over sizing.
Carlos Eduardo G. Martins, Sebastião Lauro Nau
WEG Equipamentos Elétricos, S.A.
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