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Abstract

In the context of sustainable development, energy-efficient conversion technologies play an important role in reducing energy consumption and minimizing environmental impact. High-efficiency line-start permanent-magnet synchronous motors (LSPMSM) have emerged as a promising alternative to conventional motors. This study investigates the potential of LSPMSM as a viable solution for sustainable industrial development. An integrated approach combining motor design optimization, performance analysis, and environmental impact assessment is applied to evaluate the benefits of replacing conventional low-efficiency IE1 squirrel-cage induction motors (SCIM) with the proposed solution. A proposed step-skewed permanent magnet (PM) configuration of LSPMSM 2.2 kW, 4 poles is introduced. The proposed motor which achieves an International Efficiency Class 4 (IE4) efficiency level (η ≥ 89.5%) along with an improved THDph value of 0.095, demonstrated superior performance compared with conventional IE1 motors. Beyond technical improvements, this research quantifies the environmental benefits of replacing large-scale motors. The results show that replacing 100,000 IE1 motors with IE4 LSPMSM motors can reduce approximately 53,400 tons of CO₂ emissions per year, along with significant reductions in SO₂, NOx, and CO emissions. In addition, the economic analysis indicates a short payback period of approximately 2.1 years, confirming the financial feasibility of the proposed solution. Overall, the proposed LSPMSM provides a practical solution for improving industrial energy efficiency while supporting carbon emission reduction and sustainable industrial development.

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Jacek F. G.  &  Mitchell Wing. 

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