A novel design methodology for the compliance of single phase induction motors with recent industrial premium efficiency standards

• Published in: Engineering reports (Hoboken, N.J.) N.J.), 2020-11, Vol.2 (11), p.n/a
• Main Authors: Chasiotis, Ioannis D., Karnavas, Yannis L.
• Format: Article
• Language: English
• Subjects: electrical machine design and manufacturing; high performance motor; premium efficiency standards; single‐phase induction motor
• ISSN: 2577-8196; 2577-8196
• DOI: 10.1002/eng2.12265

The single‐phase induction motors (SPIMs) are widely used in several household and industrial applications and thus millions of them are produced every year. Despite the fact that their output power is low, their efficiency enhancement could lead to significant energy savings. The SPIMs are included to the new industrial efficiency standards for commercial motors. Consequently, the minimum efficiency that the SPIMs have to present is that of IE3 (premium‐efficiency). The already conducted research efforts have not provided a robust and acceptable—from economical and manufacturing point of view—design procedure toward their efficiency improvement. For this purpose, a novel design methodology is proposed here. It is proven that the required efficiency ratings are achievable with the increment of the motor's axial length, the proper design of the rotor bar slot and the careful selection of the auxiliary to main winding turns ratio along with the value of the used capacitor. Aiming to verify its effectiveness, the presented methodology has been applied to SPIMs with different output power ratings. Moreover, the derived results are compared to the corresponding ones obtained from other design strategies. The motor's nominal performance and its behavior during the start‐up phase have been determined through finite element analysis. According to recent International Standards the minimum efficiency of single phase induction motors should be at least of IE3 category (premium‐efficiency). Up to now, the already conducted research efforts have not provided a robust and acceptable—from economical and manufacturing point of view—design procedure toward this efficiency improvement. For this purpose, a novel design methodology is proposed in the article satisfying the Standards requirements compliance.