Rotary electric arch pulse power switch

Abstract

A rotary electric arc impulse power switch belongs to a high current impulse power closing switch, which is to make electric arc rotate at a high speed under the control of axial magnetic field to lower electrode ablation and prolong switch service life, so as to adapt to operations of high current. The invention includes an internal electrode, an external electrode, an upper circuit and a lower coil respectively, and an upper cover plate and a lower cover plate respectively. The internal electrode is a column with the cross section like a Chinese character wang; the external electrode is two semi-discs, which constitute a coaxial column structure outside the internal electrode; the upper and the lower ends of the internal electrode are connected with the upper and the lower circuits mechanically and electrically; the coiling direction of the upper and the lower circuits ensures the same rotation direction of current; the upper and the lower covers fix the internal and external electrodes and upper and the lower circuits through insulated materials. The working gas of the invention is the air of atmospheric pressure, and needs not to be sealed particularly; when the switch is turned on, electric arc rotates along the internal electrode at a high speed under the control of the axial magnetic field, thus lowering the ablation of switch electrode and prolonging service life of the switch.

Description

technical field [0001] The invention belongs to a large current pulse power closing switch, in particular to a rotary arc pulse power switch controlled by an axial magnetic field. Background technique [0002] In the pulse power system, the switching element plays a pivotal role, because the parameters and characteristics of the switching element have the most direct and sensitive influence on the rise time and amplitude of the pulse. Pulse power switches generally work under high voltage and high current, and the conditions are very harsh. The breakdown phenomenon in the switch and the physical process of discharge on the switch electrode are very complicated. The ablation of the switch electrode material during breakdown will directly affect the switch. performance and lifespan. Therefore, the development of various switching elements that can withstand high voltage and high current, short breakdown time delay and small dispersion, small inductance and resistance, slight ...

AI Technical Summary

Problems solved by technology

Although this kind of rotary arc switch can realize the rotation of the arc, but because the magnetic field driving the arc rotation is weak, the speed of the arc movement is not fast, which does not play a good role in reducing electrode ablation, and this switch cannot work in large current situation, therefore, it is necessary to improve the switch

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