Design Of High Voltage Circuit For Electronic Safety And Initiation System Of Fuze

High voltage circuitry is an important part of the fuze electronic safety and detonation system.Mainly to achieve the 28 V on the bullet control system to provide a voltage of more than 1200 V detonation voltage.This design is based on the existing technology of high voltage converter circuit of fuze electronic safety and initiation System,and based on the requirements of GJB373B-2019 "Fuze Safety Design Criterion" and GJB6456-2008 "Fuze Electronic Safety and release device Design Criterion",analyzing and studying the high-voltage converter circuit.First of all,it analyzes both the research status of electronic safety system at home and abroad and the research status of high voltage conversion technology.Besides,it is determined that the main research content of high voltage conversion circuit is the study of transformer.Through the comparison of various boost principles,it is clear that the working principle of the high voltage conversion circuit adopted in this design is to use flyback PWM mode to drive DC/DC boost circuit,and the overall scheme of this design is designed.Secondly,the hardware of the high voltage circuit is designed according to the overall scheme.This paper not only introduces the design and selection of the main components(main control chip,DC/DC boost transformer,high voltage diode,transformer main switch,high voltage energy storage capacitor and high voltage pulse power switch),but also designs and analyzes the main circuit systems(isolated power supply circuit,microcontroller peripheral main circuit,control drive circuit,DC/DC boost circuit,high voltage feedback circuit).Thirdly,the software of the high-voltage circuit is designed according to the overall scheme.The safety logic of the high voltage circuit is designed,and the work flow of the control chip and the software program of the main control chip are introduced.Finally,conduct physical development and testing experiments on the high-voltage part of the electronic safety and detonation system of the fuse.Test the indicators such as boost voltage,boost time,and discharge current through experiments,and analyze the obtained data.Through a series of debugging,it was found that when the frequency is48 k HZ and the duty cycle is 30%,the charging time is 310 ms,the voltage can reach1256.3V,and the current can reach 1062 A.The test data meets the design indicators of the high-voltage circuit of the fuse electronic safety and detonation system.