The EGR system is a critical solution for NOx emissions in marine diesel engines. A key component of this system is the driving motor for the EGR blower, which must satisfy demanding operational requirements, including enhanced efficiency, improved rotor shaft stability during high-speed operation, and strict saturation temperature limits. In this study, a high-speed IPMSM utilizing SmCo permanent magnets is proposed to achieve high efficiency and a compact, lightweight design. The proposed IPMSM is designed with rated speed of 9,000rpm, max speed of 12,500rpm, and rated output-power of 150kW. The electromagnetic characteristics were analyzed using the FEM. To validate the design, a prototype IPMSM was fabricated and integrated into an EGR blower system. Finally, the performance characteristics were evaluated and discussed in relation to key electrical and mechanical design parameters.
Jo et al. (Thu,) studied this question.
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