温度对非晶合金卷形铁心磁特性及振动的影响分析

Effects of temperatures on magnetic properties and vibration of amorphous alloy roll-core

非晶合金作为新型节能铁心材料,其低损耗特性使其在铁心电力设备中拥有广泛的应用前景。非晶合金变压器实际运行环境复杂,铁心工作温度会随环境温度而升高,同时铁心自身也存在温升效应,因此铁心温度对非晶材料磁特性和振动特性的影响不能忽视。为更准确分析非晶铁心振动,本文首先对未退火的非晶带材进行了磁特性测量,并对比分析不同温度下退火后的非晶卷形铁心的磁化特性;在此基础上考虑磁致伸缩效应,建立非晶卷形铁心的磁-机械耦合有限元模型,对非晶铁心磁通密度和应力进行了仿真计算。最后,利用振动分析仪测量铁心振动加速度验证计算值,并研究分析了该铁心在不同温度下的振动加速度变化。

Amorphous alloy as a new type of energy-saving core material has a wide application prospect in electrical equipment because of its low loss characteristic.The actual operating environment of amorphous transformer is complex,and the operating temperature of the core will increase with the ambient temperature.Meanwhile,the core itself has a temperature rise effect,so the influence of the core temperature on the magnetic properties and vibration characteristics of amorphous materials cannot be ignored.In order to analyze the vibration of amorphous core more accurately,the magnetic properties of amorphous steel strip without annealing are measured first,and the magnetization characteristics of amorphous roll-core after annealing at different temperatures are compared and analyzed.Based on the magnetostrictive effect,the magneto-mechanical coupled finite element model of amorphous roll-core is established,and the magnetic density and stress of amorphous core are simulated.Finally,the vibration acceleration of the amorphous core is measured by a vibration analyzer,and the vibration acceleration changes of the amorphous core at different temperatures are analyzed.