Measurement method for switching-on/off of secondary coil of Tesla transformer

Abstract

The invention provides a measurement method for switching-on / off of a secondary coil of a Tesla transformer. The measurement method comprises the following steps: leading out a low-voltage end of the secondary coil at a low-voltage end assembling position of the secondary coil of the Tesla transformer through a sealing and insulating structure; when the Tesla transformer works normally, connecting the low-voltage end of the secondary coil of the Tesla transformer with a Tesla transformer shell through a short circuit terminal; when the switching-on / off of the secondary coil of the Tesla transformer is measured, taking off the short circuit termina of the secondary coil from the outer part; measuring a resistance curve of a secondary loop under different frequencies in a switching-on / off process; applying sine signals with different frequencies between the low-voltage end of the secondary coil of the Tesla transformer and the Tesla transformer shell; with regard to the normal secondary coil of the Tesla transformer, the secondary loop of the Tesla transformer being at a low-resistance state nearby a resonance frequency fr and being at a high-resistance state for other frequencies; with regard to the broken secondary coil of the Tesla transformer, the secondary loop of the Tesla transformer being at the high-resistance state in a whole measurement process; judging whether the coil is switched on or off through the occurring or not of the low-resistance state under different frequencies. The method provided by the invention is simple to implement.

Description

technical field [0001] The invention belongs to the technical field of pulse power, and in particular relates to a method for measuring the on-off of a secondary coil of a Tesla transformer. Background technique [0002] Tesla transformer is a pulse step-up device commonly used in pulse power technology. Tesla transformer is usually a double-resonant pulse transformer with coaxial structure. The coaxial structure makes the voltage distribution on the secondary coil very close to the potential distribution in the coaxial line, which greatly reduces the distributed capacitance of the high-voltage secondary coil to the ground. In addition, the Tesla transformer can work independently of the magnetic core, and its step-up ratio is not affected by the nonlinear effect of the magnetic core. Therefore, Tesla transformers avoid the defects of conventional pulse transformers to a certain extent, and thus are widely used. [0003] The secondary working voltage of a Tesla transformer...

AI Technical Summary

Problems solved by technology

One end of the secondary coil of the Tesla transformer is connected to the metal casing, while the other end (high voltage end) is connected to the inner metal cylinder, which makes it impossible to directly measure the on-off state of the secondary coil after the system is assembled.

Due to the characteristics of Tesla transformers to achieve high transformation ratio, the secondary coil is usually wound by thin enameled wire, and it is in a high-voltage electric field. It is easy to disconnect due to breakdown and other reasons during operation, especially in the state of repetition frequency.

The disconnected secondary coil will still generate high voltage under the excitation of the primary current, and the disconnected part will be broken down and turned on, and the secondary charging voltage waveform of the capacitor has no obvious change, so it is impossible to visually judge whether the secondary coil is on or off

However, the breakdown at the disconnection will pollute the insulating medium such as transformer oil in the transformer and reduce the insulation capacity, which will easily cause further breakdown, enlarge the fault, reduce the output pulse voltage or burn the electronic control system, etc.

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