Test method and device of magnetization characteristic of magnetic core under fast pulse voltage

Abstract

The invention relates to a test method and device of the magnetization characteristic of a magnetic core under a fast pulse voltage. By adopting the primary pulse voltage gradient, i.e., Vp/(n.Se.tr) of a unit area single-turn feed-in induction cavity as a characteristic parameter for representing the magnetization field intensity characteristic of the magnetic core and by changing the charging voltage or the winding turn of a fast front edge pulse voltage generator, the hysteresis loop of the magnetic core under the fast pulse voltage with different characteristic parameters can be acquired through testing. The test device disclosed by the invention comprises a low-induction capacitor C, a fast pulse resistance voltage divider RD1/RD2, a short-gap gas switch Gap, a primary winding, a secondary winding, a current coil and an outer cylinder. The test device can generate a fast front edge pulse voltage with the front edge being less than 20ns and the amplitude being 20-80kV and reaches the magnetization field intensity characteristic parameter value under actual working conditions of an FLTD (Fast Linear Transformer Driver) and an IVA (Ideal Voltage Amplifier).

Description

technical field [0001] The invention provides a method and device for testing the magnetization performance of a magnetic core under a fast pulse voltage, using a single turn per unit area to feed the primary pulse voltage gradient of the induction cavity, namely V p / (n·S e ·t r ) is used as a characteristic parameter to characterize the magnetic field intensity characteristics of the magnetic core. By changing the charging voltage or the number of winding turns of the fast frontier pulse voltage generator, the hysteresis loop of the magnetic core under different characteristic parameters of the fast pulse voltage is tested and obtained. technical background [0002] Inductive Voltage Adder (IVA for short) and Fast Linear Transformer Driver (FLTD for short) are useful in fields such as fast Z-pinch, flash photography, strong laser, high-power microwave and particle beam generation. Broad application prospects. What IVA and LTD have in common: They are essentially fast pul...

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Problems solved by technology

[0004] At present, there is a lack of characteristic parameters and test devices to characterize the magnetic field strength characteristics of the magnetic core under fast pulse voltage. The geometric parameters, cross-sectional area, number of magnetic rings and primary applied voltage pulses of the magnetic core are different during the performance test of the magnetic core. The characteristic parameters of the magnetic field intensity characteristics of the core magnetization make it impossible to infer the pulse magnetization performance of the large-sized magnetic ring of the same material and process under the same working conditions through the test results of the small sample magnetic ring, and the test results of the magnetic core under different test conditions cannot be inferred. Compare

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