전기추진함정의 Common Mode 전압 저감을 위한 PWM 기법

이대한¹ ; 이종혁² ; 김소연³^{, *}

1해군 소령/방위사업청 연구개발사업조정TF 핵심기술담당
2해군 중령/합동참모본부 전력기획부 해상전략무기담당
3해군 중령/해군사관학교 전자제어공학과 교수

PWM Techniques for Reducing Common-Mode Voltage in Electric Propulsion Ships

Dae Han Lee¹ ; Jong Hyuk Lee² ; So Yeon Kim³^{, *}

1LCDR, ROK Navy/Core technology officer, Research and Development Program Coordination TF, Defense Acquisition Program Administration
2CDR, ROK Navy/Navy strategic weapons officer, Dept. of Weapon planning, ROK Joint Chiefs of Staff
3CDR, ROK Navy/Professor, Dept. of Electronics and Control Engineering, Republic of Korea Naval Academy

Correspondence to: ^*So Yeon Kim Dept. of Electrical Engineering, Republic of Korea Naval Academy 1 Jungwon-ro, Jinhae-gu, Changwon-si, Gyungsangnam-do, 51704, Republic of Korea Tel: +82-55-907-5315 E-mail: ksy4rang@navy.ac.kr

초록

본 논문에서는 기존 기계식 추진체계를 대체할 수 있는 전기추진 방식의 적용 가능성과 그에 따른 전력 품질 및 전자기 간섭 문제를 다룬다. 특히, 전동기 구동 시스템에 포함된 PWM 인버터에서 발생하는 common mode 전압이 누설전류와 EMI의 주요 원인으로 작용함을 분석하였다. 이러한 문제 해결을 위해 다양한 PWM 기법을 비교하고, 각 방식의 특성과 효과를 평가하였다. 이를 통해 전기추진 함정 설계 시 효율적이고 안정적인 전력 운용 방안을 제시하고자 한다.

Abstract

This paper addresses the applicability of electric propulsion systems as an alternative to conventional mechanical propulsion in naval vessels, along with the resulting challenges in power quality and electromagnetic interference (EMI). In particular, it analyzes how common mode voltage generated by PWM inverters within motor drive systems becomes a major source of leakage current and EMI. To mitigate these issues, various PWM techniques are compared and their characteristics and effectiveness are evaluated. Based on this analysis, the study proposes efficient and reliable power operation strategies for the design of electric propulsion ships.

Keywords:

Electric Propulsion Ship, PWM inverter, Common Mode Voltage, Leakage Current

키워드:

전기추진함정, 전압폭변조 인버터, 공통모드 전압, 누설전류

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