磁悬浮储能飞轮高速永磁电机设计及优化

The Design and Optimization of High-speed Permanent Magnet Machines for Maglev Flywheel Energy Storage System

高速磁悬浮储能飞轮是一种新型高比功率储能装置,其中高速大功率电机是能量转换与传输控制的核心。本文针对所研究的300kW磁悬浮飞轮储能系统的应用特性提出了一种轴式永磁同步电机方案,从电磁、结构和控制等方面进行综合分析与设计;在此基础上,为了适应高速稳定运行、高功率放电对高速电机提出的新要求,从转子的结构强度、电机损耗、运行区间的效率、转矩波动等方面出发对电机的设计参数进行优化分析。结果表明:优化后的电机结构强度高,能够满足储能飞轮在高转速、高功率连续充放电等工况下的使用要求,15000~30000r/min工作转速范围内电机效率达到90%以上。

High-speed magnetic suspension flywheel is a new type of high specific power energy storage device, in which high speed and high power motor is the core of energy conversion and transmission control. According to the application characteristics of 300 kW magnetic suspension flywheel energy storage system, a scheme of axial permanent magnet synchronous motor was proposed, and the comprehensive analysis and design was carried out from the electromagnetic, structure and control aspects in this article. On this basis, in order to adapt to the new requirements of high-speed motor put forward by high-speed stable operation and high power discharge, the design parameters of the motor were optimized and analyzed from the aspects of rotor structural strength, motor loss, efficiency of operation interval, torque fluctuation, etc. The results show that the motor structure strength is high, which can meet the requirements of the energy storage flywheel under the working conditions of high speed and high power continuous charging and discharging, and the motor efficiency can reach more than 90% within the working speed range of 15000~30000 r/min.