A suggestion for space harmonic injection into motor current to reduce propeller vibration

IF 2.3 3区 工程技术 Q2 ENGINEERING, MARINE International Journal of Naval Architecture and Ocean Engineering Pub Date : 2024-01-01 DOI:10.1016/j.ijnaoe.2024.100618
Yeojin Hyun , Kwang-Jun Paik , Soyoung Sung , Junghyung Park , Soon-Hyun Lee , Jinyeong Park
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Abstract

Propellers produce fluctuating thrust and torque as they rotate in a non-uniform wake field. They contribute most of the vibration and noise generated by the propeller and can lead to mechanical damage to shafts and bearings. Recently, the demand for electric propulsion ships has increased. As the torque and speed fluctuations are generated in marine propellers, harmonic components in the current and voltage of the propulsion motor occur and lead to increased losses, device degradation, and torque pulsations. In this study, a harmonic injection method is proposed to reduce the impact of motor and mechanical vibration caused by the fluctuating load torque of the propeller. A harmonic component is applied to the current of the motor to generate a motor torque with a different phase of the same magnitude as the variation of the load torque of the motor. In this study, a computational fluid dynamics simulation was performed to obtain the torque of the target vessel, medium range tanker, and a MATLAB Simulink was used to model the motor simulation. It was found that the harmonic injection method can reduce the mechanical torque fluctuation of the motor by 87%.

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向电机电流注入空间谐波以减少螺旋桨振动的建议
螺旋桨在不均匀的尾流场中旋转时会产生波动的推力和扭矩。螺旋桨产生的大部分振动和噪音都是由它们造成的,并可能导致轴和轴承的机械损坏。最近,对电力推进船舶的需求有所增加。由于船用推进器会产生扭矩和速度波动,推进电机的电流和电压中会出现谐波成分,从而导致损耗增加、设备性能下降和扭矩脉动。本研究提出了一种谐波注入方法,以减少螺旋桨负载扭矩波动对电机和机械振动的影响。谐波分量被应用到电机的电流中,以产生与电机负载转矩变化幅度相同的不同相位的电机转矩。本研究通过计算流体动力学仿真获得了目标船(中程油轮)的扭矩,并使用 MATLAB Simulink 建立了电机仿真模型。研究发现,谐波注入方法可将电机的机械扭矩波动降低 87%。
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来源期刊
CiteScore
4.90
自引率
4.50%
发文量
62
审稿时长
12 months
期刊介绍: International Journal of Naval Architecture and Ocean Engineering provides a forum for engineers and scientists from a wide range of disciplines to present and discuss various phenomena in the utilization and preservation of ocean environment. Without being limited by the traditional categorization, it is encouraged to present advanced technology development and scientific research, as long as they are aimed for more and better human engagement with ocean environment. Topics include, but not limited to: marine hydrodynamics; structural mechanics; marine propulsion system; design methodology & practice; production technology; system dynamics & control; marine equipment technology; materials science; underwater acoustics; ocean remote sensing; and information technology related to ship and marine systems; ocean energy systems; marine environmental engineering; maritime safety engineering; polar & arctic engineering; coastal & port engineering; subsea engineering; and specialized watercraft engineering.
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