Practical research on mechanical adjustable reactor

This paper presents a Mechanical Adjustable Reactor (MAR), which provides a magnetic circuit and device whose reluctance could be controlled by provision of a rotatable iron core. The main difference between MAR and conventional single-phase reactor is that a rotatable iron core is inserted in the upper yoke. Its reactance adjustment in a wide range can be obtained because of the rotatable iron core. Besides, The driving system, which consists of stepping motor, over-running clutch and reducer, brings great improvement on anti-electromagnetic torque. The model of MAR is established and studied in the MAXWELL software, and a prototype of 315kVA/10kV adjustable reactor has also been manufactured to study the magnetic characteristics of the MAR. The actual measurement values match well with the theoretical calculations, and the inductance could be continuously varied within 32% ~ 100%, which indicates a promising prospect for industrial application.