에너지 절감을 위한 소형 선박용 전기 추진체인 고효율·고토크용 다상 BLDC 모터 설계에 관한 연구
Design of High-Efficiency and High-Torque Multiphase Motor with Electric Propulsion System for Small Vessels for Energy Saving
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초록
본 논문은 소형 전기 추진 선박에 사용되는 고효율 다상 BLDC(Multi-phase Brushless Direct Current)개발로전기 추진 선박은 디젤엔진을 이용하여 추진하는 기계식 추진방식에 비해 승선감이 뛰어나고 조정 성능이 우수하며, 선박 내부 배치 및 선형 설계의 유연성이 매우 높기 때문에 고효율 선박 설계가 가능하다. 이에 환경적 측면에서 클린 에너지가 사용되어야 하며 에너지 저장과 원가절감을 위하여 소형 전기 선박용으로 전기 추진체인 모터는 필수적이며 저소음을 가지는 BLDC 추진체 개발과 에너지 절감을 가지는 고효율 모터가 필수적이다. 그래서 본논문에서는 저소음·고효율·고토크를 가지는 다상 BLDC 모터 및 제어기와 알고리즘으로 시간영역에서의 비례, 적분 및 미분상수를 결정하는 Ziegles–Nichols법을 설계하고 FOC제어를 통한 전기 추진체의 추진 모터 속도 제어를 실측을 통하여 이를 검증하고자 한다.
Abstract
In this study, a high-efficiency multiphase brushless direct current (BLDC) used in small electric thrusters is developed. It enables high-efficiency ship design because electric-propulsion ships possess a better sense of boarding and offer better adjustment than mechanical propulsion methods used for diesel engines, as well as because of the high flexibility of ship internal arrangement and linear design. Therefore, clean energy should be used from an environmental perspective. Meanwhile, for energy saving and cost reduction, an electric-propulsion chain motor is essential for small electric ships, in addition to a high-efficiency motor with low noise BLDC propellant development and energy saving. Therefore, this study proposes the Ziegles–Nichols method, which determines proportionality, integration, and differential constants in the time domain with a multiphase BLDC motor and controller with low noise, high efficiency, and high torque. Subsequently, this method is verified through the actual measurement of the propulsion motor speed of the electric propellant via FOC control.
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