Energy-Efficient Control of Electric Motors for Industrial Applications
DOI:
https://doi.org/10.66238/jaeee35Keywords:
Electric motors, Energy efficiency, Variable frequency drives, Industrial automation, Motor controlAbstract
Electric motors are essential to industrial production, powering equipment such as pumps, fans, compressors, conveyors, and machine tools. Their widespread use and long operating hours make motor-driven systems an important opportunity for reducing industrial electricity consumption. This review examines control strategies that improve energy efficiency while maintaining the performance required by industrial processes. It discusses variable frequency drives, motor sizing, control methods, load management, monitoring, predictive maintenance, and economic assessment. Particular attention is given to matching motor speed and torque to actual process demand and assessing the complete motor-driven system rather than the motor alone. An illustrative graph demonstrates the ideal relationship between speed and shaft power for a fan or pump under the affinity laws. The review finds that the suitability and benefits of energy-efficient control depend on load characteristics, operating hours, equipment condition, and the requirements of the process. Effective implementation therefore requires measurement, appropriate equipment selection, commissioning, and continued performance verification.
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