Theory and analysis of magnetic-wedge adjustable reactor
Wei Xin-la · Dianji yu kongzhi xuebao · 2015
A new kind of adjustable reactor principle was presented which achieves the inductance value changed by adjusting the air gap. In the adjustable reactor,a form of single-phase and double-winding were adopted,a controlled moveable magnetic-wedge was set in the upper yoke,by adjusting the depth of magnetic-wedge inserted in upper yoke the air gap size was changed in the magnetic circuit,and the continuous stepless adjustment of the inductance value was achieved. Combined with the analogy electric circuits its magnetic circuit was analyzed,and its inductance formula was deduced; the main design formula was optimized for applying on this magnetic-wedge adjustable reactor,and a design program was made;an experimental prototype was produced,and its adjustable inductance curve was plotted. The result shows that the relationship between inductance value and the depth of magnetic-wedge inserted is a linear function; the inductance value is maximum,when magnetic-wedge is fully inserted; while the inductance value becomes the minimum one,when magnetic-wedge is fully pulled out; when magnetic-wedge is close to the upper yoke but not inserted,the position of magnetic-wedge can also affect inductance value.