High-power high-voltage magnetic switch

Abstract

The invention relates to an efficient and simple high-power high-voltage magnetic switch. The high-power high-voltage magnetic switch comprises an insulating bracket, an iron core and a coil, wherein the coil surrounds the insulating bracket and the iron core. The high-power high-voltage magnetic switch is characterized in that the iron core is an annular iron core group formed by overlapping a plurality of small annular iron cores; the insulating bracket is positioned at the two ends of the annular iron core group; the center of the insulating bracket is hollow; a front side of the insulating bracket is provided with a plurality of concave coil clamping grooves; the coil clamping grooves are distributed circumferentially and radially by taking the hollow part as a center; concave inner-edge clamping grooves are formed in positions which are on an inner edge of the insulating bracket and aligned with the coil clamping grooves; and concave outer-edge clamping grooves are formed in positions being on an outer edge of the insulating bracket and aligned with the coil clamping groove. Through adoption of the annular iron core and the insulating bracket, higher-power and higher-voltage pulse compression is ensured; a small size and a high compression ratio are realized; and the high-power high-voltage magnetic switch can work under a high voltage.

Description

technical field [0001] The invention relates to the technical field of pulse power application, in particular to an efficient and simple high-power and high-voltage magnetic switch for realizing greater power pulse compression. Background technique [0002] In the magnetic pulse compression system, the magnetic switch is the most critical core component. The magnetic switch is mainly composed of an iron core and a coil. The ferromagnetic material of the iron core has a very large difference in permeability before and after saturation, showing switching characteristics. The non-linearity and restorability of magnetic properties can conveniently change the circuit state. Theoretically, pulse compression sources based on magnetic switches can achieve pulse compression from microsecond to nanosecond time through single-stage or multi-stage compression. [0003] According to the theoretical formula of the magnetic switch, the energy transmission time t of the magnetic pulse comp...

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Problems solved by technology

[0004] In actual engineering, to realize the compression of high-power and high-voltage pulse sources, the main technical problem is that the rising edge time of the pulse waveform output by the high-power pulse source will reach tens to hundreds of microseconds. At this time, the magnetic switch is required The magnetic saturation time t also needs to reach tens to hundreds of microseconds. In order to meet the time requirement, one solution is to increase the effective cross-sectional area Sc or the number of coil turns N. The increase in the effective cross-sectional area Sc will cause the volume of the magnetic switch to expand rapidly , increasing the number of coil turns will lead to excessive inductance after saturation, affecting the pulse rise rate; another solution is to use multiple magnetic switches to form a multi-stage compression circuit to achieve pulse compression, but this increases the complexity of the circuit and reduces the circuit reliability

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