永磁风力发电机短路时磁钢受力的研究

Research about Stressed Magnetic Steel of Permanent Magnet Wind-Driven Generator in Short Circuit

文章根据电磁场原理建立了金风62型(1.2MW)永磁同步风力发电机的电磁场二维模型,给出了基本假设和边界条件,以电机的一对磁极为计算区域分析了最为恶劣的短路条件下的电磁场。计算结果表明:在三相绕组发生突然短路时,磁钢会受到最强的去磁性质的电磁力作用。计算了受到的切向和径向的电磁力,与粘接胶的额定数据进行比较,证明粘接胶的强度能够满足要求。计算结果为粘接强度校核和机组设计提供了依据。

Base on the electromagnetism field theory, the paper constituted Jinfeng 62 （1 2. MW） 2-D model about permanent magnet synchronous wind-driven generator, presented basic hypothesis and boundary condition, calculated the most abominable electromagnetic field under the condition of short-circuit taking a pair of pole as the solution domain. The results indicate that magnetic steel would get the strongest demagnetized electromagnetic force when three-phase winding suddenly happen short-circuited, the tangential and radial electromagnetic force is calculated, compared with the given rating ,data, the results show that the pastern intension can fulfill request. The calculation results provided evidence for strength check and unit design.