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Theory and analysis of magnetic-wedge adjustable reactor
Author(s): 
Pages: 32-38
Year: Issue:  11
Journal: Electric Machines and Control

Keyword:  reactormagnetic-wedgeadjustableair gapinductance;
Abstract: 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 con-tinuous stepless adjustment of the inductance value was achieved. Combined with the analogy electric cir-cuits 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.
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