Loss component analysis of flywheel energy storage system with mechanical bearings

被引：2

作者：

Feng, Yi ^{[1
]}

Lin, Heyun ^{[1
]}

Yan, Jianhu ^{[1
]}

Huang, Yunkai ^{[1
]}

机构：

[1] Engineering Research Center for Motion Control of Ministry of Education, Southeast University

来源：

Dongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Southeast University (Natural Science Edition) | 2013年 / 43卷 / 01期

关键词：

Brushless DC motor; Energy utilization ratio; Flywheel energy storage system; Loss;

D O I：

10.3969/j.issn.1001-0505.2013.01.014

中图分类号：

学科分类号：

摘要：

In order to study the performance of flywheel energy storage system (FESS), an FESS with mechanical bearings driven by a brushless DC motor (BLDCM) was designed and manufactured and the loss of BLDCM and the system under 10000 r/min were tested, respectively. The three main losses including electrical loss, wind loss and bearing loss were analyzed. The least square method was adopted to fit the relationship between the electrical loss and the rotation speed by exponential function and the relationship between the wind loss and bearing loss and the rotation speed by polynomial function, thus separating the three main losses. The discharging time by constant power under different stand-by speeds and the energy utilization ratio through different stand-by time were calculated and analyzed. The result reveals that the magnetic bearings and vacuum environment are extremely important to improve the efficiency of the FESS. Besides, the constant-power discharging time is proportional to the 1.8th power of the stand-by speed, and the energy utilization ratio is significantly affected by both stand-by speed and stand-by time. The research results provide a theoretical basis for the decision of FESS in renewable generation system.

引用

页码：71 / 75

页数：4

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