Differential pulsed magnet insulation fault detection device

Abstract

The invention discloses a differential pulsed magnet insulation fault detection device. The differential pulse magnet insulation fault detection device comprises a first detection coil, a second detection coil, a resistance voltage divider, a high-pass filter and a high-sampling rate oscilloscope; the two detection coils are arranged along the central axis of a pulsed magnet, wherein one detection coil is arranged in the of the pulsed magnet and is adjacent to the upper port of the pulsed magnet, the other detection coil is arranged outside the pulsed magnet; two fixed ends of the resistance voltage divider are connected with the positive end and negative end of the first detection coil; the negative end of the second detection coil is connected with the negative end of the first detection coil; the input positive end of the high-pass filter is connected with the movable end of the resistance voltage divider; the input negative end of the high-pass filter is connected with the positive end of the second detection coil; the two detection coils and the resistance voltage divider form a differential structure; differential processing is performed on two detection signals; output signals are filtered and sampled; partial discharge signals are acquired; an insulation fault point is determined according to the partial discharge signals. With the differential pulsed magnet insulation fault detection device of the invention adopted, acquisition of the weak local signals of the insulation fault of the pulsed magnet can be realized. The differential pulsed magnet insulation fault detection device is advantageous in high sensitivity detection.

Description

technical field [0001] The invention belongs to the technical field of pulse magnet insulation fault detection, and more specifically relates to a differential pulse magnet insulation fault detection device. Background technique [0002] The strong magnetic field provides extreme experimental conditions for modern scientific research and is an important scientific experiment platform. Strong magnetic fields are divided into pulsed strong magnetic fields and steady-state strong magnetic fields. The pulsed strong magnetic field can provide a higher intensity magnetic field, which can better meet the requirements of some experiments for high-intensity magnetic fields. However, as the magnetic field strength continues to increase, the extreme conditions of electricity, heat, and force generated under strong magnetic field conditions may damage the insulation of the magnet; the insulation fault is often relatively small at the beginning of the germination, if it is not found in ...

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Problems solved by technology

[0004] In view of the above defects or improvement needs of the prior art, the present invention provides a differential pulse magnet insulation fault detection device, the purpose of which is to solve the problem that the prior art cannot effectively detect the weak partial discharge signal at the initial stage of the pulse magnet insulation fault

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