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<p>The electrification of marine propulsion systems has garnered continuous attention due to greenhouse gas reduction policies. This paper presents the coupled electromagnetic–mechanical analysis of direct-drive propulsion motors intended for podded propulsion systems in marine applications. The rated output power and rotational speed of the propulsion motors are 50&#xa0;kW and 1800 rpm, respectively. Three different configurations of the propulsion motors—surface-mounted permanent magnet synchronous motor (SPMSM), flat-type interior permanent magnet synchronous motor (IPMSM), and V-type IPMSM—are analyzed in a comparative study. Thermal, stress, and structure-borne noise (SBN) analyses are performed as part of the coupled electromagnetic–mechanical analysis for the designed motors. Thermal analysis is evaluated using lumped parameter thermal network. The stress analysis of the rotor core bridge of the IPMSMs is evaluated by considering centrifugal forces, thermal expansion, and electromagnetic force. Subsequently, SBN, which can predict the radiated noise as defined by the equivalent radiated power level, is evaluated for the designed motors. The design and analysis are conducted using a finite element method.</p>

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A Comparative Study of Rotor Topology of PMSM for Podded Propulsion in Marine Applications

  • 期刊论文

  • 发表日期：

    2025年5月23日

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  • Jang-Hyun Park,
  • Jae-Gil Lee,
  • Do-Kwan Hong

摘要

The electrification of marine propulsion systems has garnered continuous attention due to greenhouse gas reduction policies. This paper presents the coupled electromagnetic–mechanical analysis of direct-drive propulsion motors intended for podded propulsion systems in marine applications. The rated output power and rotational speed of the propulsion motors are 50 kW and 1800 rpm, respectively. Three different configurations of the propulsion motors—surface-mounted permanent magnet synchronous motor (SPMSM), flat-type interior permanent magnet synchronous motor (IPMSM), and V-type IPMSM—are analyzed in a comparative study. Thermal, stress, and structure-borne noise (SBN) analyses are performed as part of the coupled electromagnetic–mechanical analysis for the designed motors. Thermal analysis is evaluated using lumped parameter thermal network. The stress analysis of the rotor core bridge of the IPMSMs is evaluated by considering centrifugal forces, thermal expansion, and electromagnetic force. Subsequently, SBN, which can predict the radiated noise as defined by the equivalent radiated power level, is evaluated for the designed motors. The design and analysis are conducted using a finite element method.