受控磁楔线性可调电抗器

Controlled Magnetic-wedge Linear Adjustable Reactor

提出一种以受控磁楔为电感调节方式的电抗器,利用磁楔插入的深度来改变工作磁路中等效气隙大小,从而实现电感值连续可调。详细分析3种调节情况下电抗器工作原理并推导电感计算模型;用ANSYS软件仿真验证电抗器磁场分布;制作一台实验样机及磁楔控制系统,测试电感调节特性;仿真和实验结果证实了该电抗器调节原理的正确性。研究结果表明:电感调节特性表征为分段函数,磁楔位于正区时,电感值与磁楔插入深度呈一次函数关系,磁楔完全插入时,电感值最大,磁楔完全抽出时,电感值最小;磁楔位于负区时,电感值与磁楔位置呈双指数函数关系,距离越近电感值对磁楔位置变化越敏感;正区的电感调节范围是负区的20倍,正区具有大范围快速调感的作用,负区具有微调电感的作用;磁楔具有控制磁路的功能,可抑制气隙边缘效应。

This paper proposed a reactor whose inductance adjustment was based on a controlled magnetic-wedge.By adjusting the depth of controlled magnetic-wedge inserted to change the equivalent air-gap in magnetic path which could lead to inductance value adjusted continuously,reactor’s working principles in 3 conditions were analyzed in detail and inductance’s mathematical models were provided.ANSYS was used to simulate the magnetic field in order to verify the analysis previously.An experimental prototype and magnetic-wedge controlling system were made in order to measure inductance adjustment curve.Simulations and experimental results confirmed the correctness of this reactor’s theory.Results showed that inductance’s adjustment curve was a piecewise function,when magnetic-wedge was in positive section,the relationship between inductance and depth of magnetic-wedge inserted was a linear function,if magnetic-wedge was totally inserted,the inductance was maximum,if magnetic-wedge was totally pulled out,the inductance was minimum.When magnetic-wedge was in negative section,the relationship between inductance and position of magnetic-wedge was a double-exponential function,the nearer magnetic-wedge’s position was,the more sensitively inductance changed.The range of inductance adjustment in positive section was 20 times as large as that in negative section.The controlled magnetic-wedge could adjust inductance widely and quickly in positive section,while it could only fine-tune the inductance in negative section.Magnetic-wedge could control magnetic path and restrain air-gap edge effect.