Check patentability & draft patents in minutes with Patsnap Eureka AI!

A crowbar circuit and its waveform adjustment method for measuring the direct effect of aircraft lightning

A waveform adjustment and aircraft technology, which is applied in the direction of emergency protection circuit devices, circuit devices, emergency protection circuit devices, etc. for limiting overcurrent/overvoltage, can solve problems such as poor waveform quality and large oscillations, and achieve improved transient Effects of interference, amplitude reduction, and quality improvement

Active Publication Date: 2018-04-17
XI AN JIAOTONG UNIV
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the output current waveform of the existing CROWBAR circuit has a particularly large oscillation at the moment of switching between the main discharge switch and the CROWBAR discharge switch, and the waveform quality is poor.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A crowbar circuit and its waveform adjustment method for measuring the direct effect of aircraft lightning
  • A crowbar circuit and its waveform adjustment method for measuring the direct effect of aircraft lightning
  • A crowbar circuit and its waveform adjustment method for measuring the direct effect of aircraft lightning

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0020] The structural principle and working principle of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0021] see figure 1 , the CROWBAR circuit for aircraft lightning direct effect test of the present invention includes energy storage capacitor 1, main discharge switch 2, CROWBAR discharge switch 3, waveform forming inductance 4, load 5 and CROWBAR loop output pulse current detection coil 6.

[0022] see figure 2 , the equivalent circuit of the CROWBAR circuit of the aircraft lightning direct effect test of the present invention, in the mesh loop formed by the energy storage capacitor 1, the main discharge switch 2, and the CROWBAR discharge switch 3, the equivalent inductance Lr1 includes the energy storage capacitor 1 high-voltage end The equivalent inductance of the electrical connection A-B between the main discharge switch 2 high voltage end, the electrical connection equivalent inductan...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a CROWBAR circuit for measuring the direct effect of aircraft lightning and a waveform adjustment method thereof. The circuit of the invention includes an energy storage capacitor, a main discharge switch, a CROWBAR discharge switch, a waveform forming inductance and a load. By reducing the residual inductance of the mesh loop formed by the energy storage capacitor, the main discharge switch and the CROWBAR discharge switch, the oscillation of the output current waveform of the CROWBAR loop at the current peak can be significantly improved; reducing the amplitude of the trigger pulse of the CROWBAR discharge switch can significantly improve The transient interference of the output current waveform of the CROWBAR loop at the current peak; the damping resistor is connected in series in the mesh loop formed by the energy storage capacitor, the main discharge switch and the CROWBAR discharge switch, but the damping resistor is not included in the CROWBAR discharge switch and the waveform forming inductance In the mesh loop formed. The above methods can effectively improve and improve the quality of the output current waveform of the CROWBAR loop.

Description

technical field [0001] The invention belongs to the technical field of lightning protection in aerospace, and relates to a CROWBAR circuit for testing the direct effect of aircraft lightning, in particular to a waveform adjustment method for the CROWBAR circuit for testing the direct effect of aircraft lightning. Background technique [0002] With the improvement of aircraft design and the advancement of carbon fiber composite material technology, the use of carbon fiber reinforced polymer composite material CFRP (Carbon Fiber Reinforced Polymers) in large civil aircraft, military aircraft, drones and stealth aircraft continues to grow. The proportion of CFRP materials on Airbus A350XWA reached 53%. Compared with the traditionally used aluminum, steel and titanium alloy materials, the electrical conductivity of CFRP is poor, so that CFRP laminates cannot quickly transfer or diffuse the accumulated charge in a short time like metal materials in the case of lightning strikes. ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H02H9/02
Inventor 姚学玲陈景亮许雯珺孙晋茹
Owner XI AN JIAOTONG UNIV
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com