Magnetic core reverse excitation system and method for multi-pulse linear induction accelerator

Abstract

The invention discloses a magnetic core reverse excitation system and method applied to a multi-pulse linear induction accelerator. The magnetic core reverse excitation system comprises a comprehensive control module, a program power supply unit, a constant current source unit, a switching control unit and a plurality of reverse excitation modules. The comprehensive control module is connected with an external industrial personal computer, the comprehensive control module is further connected with signal ends of the program power supply unit, the constant current source unit and the switching control unit through communication lines, and the switching control unit is connected with power supply ends of the multiple reverse excitation modules. A low-voltage steady-current reverse excitation power supply is output to a magnetic core of the multi-pulse linear induction accelerator through the constant-current source, strong electromagnetic interference cannot be generated to the outside, low-voltage data acquisition is adopted, integration and control intelligence of the whole system are facilitated, and multi-path switching control of the constant-current source is achieved. Reverse excitation is sequentially carried out on the magnetic cores of the multiple multi-pulse linear induction accelerators in an automatic full-closed-loop mode, a constant current source is efficiently utilized, the magnetic core reverse excitation efficiency of the accelerators is improved, and high-precision and high-efficiency reverse excitation magnetic cores are achieved.

Description

Technical Field

[0001] The invention relates to the field of linear induction accelerators, and in particular to a magnetic core reverse excitation system and method for a multi-pulse linear induction accelerator. Background Art

[0002] A constant current source is a power source that can provide a stable current to the reverse excitation module. It has the advantages of high constant current accuracy, stability and fast response. It is widely used in fields such as communication technology and defense industry. Through the multi-channel switching control of the constant current source, a single constant current source can be used as the power source for multiple reverse excitation modules, thereby realizing efficient use of the constant current source. The Hall sensor is an important electronic component of the constant current source multi-channel switching control unit. The Hall sensor measures the current of a single switching control circuit as a feedback signal to quickly switch the reverse excitation module circuit. However, due to individual production and manufacturing errors, the zero drift of the Hall sensor brings about measurement current errors, reduces the control accuracy of the switching control unit, and thus increases the error of the entire circuit system. Summary of the invention

[0003] The present invention aims to provide a magnetic core reverse excitation system and method for a multi-pulse linear induction accelerator. A low-voltage and steady-current reverse excitation power supply is output to the magnetic core of the multi-pulse linear induction accelerator through a constant current source, which does not generate strong electromagnetic interference to the outside, is safe and reliable, has strong anti-interference performance, uses low-voltage data acquisition, is convenient for the integration of the whole system and intelligent control, and reversely excites the magnetic cores of multiple multi-pulse linear induction accelerators in sequence in an automatic full-closed loop through multi-channel switching control of a constant current source, efficiently utilizes the constant current source, improves the reverse excitation efficiency of the magnetic core of the accelerator, and realizes reverse excitation of the magnetic core with high precision and high efficiency.

[0004] The purpose of the present invention is achieved through the following technical solutions:

[0005] First aspect:

[0006] A magnetic core reverse excitation system for a multi-pulse linear induction accelerator comprises an integrated control module, a program power supply unit, a constant current source unit, a switching control unit, and a plurality of reverse excitation modules. The first signal port of the integrated control module is connected to an external industrial computer through an optical fiber; the second signal port of the integrated control module is respectively connected to the signal ends of the program power supply unit, the constant current source unit, and the switching control unit through a communication line; the power output end of the program power supply unit is respectively connected to the power input ends of the constant current source unit and the switching switch unit through a power line; the power output end of the constant current source unit is connected to the power input end of the switching switch unit 4 through a power line; and the switching control unit is connected to the power ends of a plurality of reverse excitation modules through a power line.

[0007] Furthermore, the first signal port of the integrated control module is connected to an external industrial computer through an optical fiber, receives and converts instructions issued by the upper software of the external industrial computer, and outputs control signals to the program power supply unit, the constant current source unit and the switching control unit, thereby controlling the power output of the program power supply unit and the constant current source unit, and the switch conduction of the switching control unit; at the same time, the feedback signals collected by the constant current source unit and the switching control unit are input to the second signal port of the integrated control module through the communication line.

[0008] Furthermore, the integrated control unit is independently developed and manufactured using domestic high-performance chips, and the communication interface uses photoelectric isolation, which has strong anti-electromagnetic interference capabilities.

[0009] Furthermore, the program power supply unit is externally connected to a 380V mains input, outputs a 110V power supply to provide power for all control units, and outputs two 380V power supplies to the constant current source unit.

[0010] Furthermore, the constant current source unit inputs the 380V power supply output by the program power supply unit, and the core reverse excitation power supply parameters (conduction time T 设 , voltage U 设 、Current I 设 ) as a reference, fast voltage control and rectification, output low voltage DC current I 恒 , and real-time monitoring of the output current I 恒 , voltage U 恒 And the conduction time T 恒 , uploaded to the upper software, and through data comparison and analysis, it is used to accurately determine whether the reverse excitation of the core is completed, forming a fully closed-loop precise control.

[0011] Furthermore, the constant current source unit provides a stable and reliable low-voltage DC reverse excitation current for the magnetic core of the magnetic core reverse excitation module, which is safe and reliable and will not generate strong electromagnetic interference to the outside.

[0012] Furthermore, the switching control unit outputs the low-voltage DC current I in sequence according to the automatic or manual reverse excitation instruction given by the external industrial computer and the control signal converted and distributed by the integrated control module according to the program-set timing or manual control. 恒 To each reverse excitation module, and in the set time period, only one low-voltage DC reverse excitation current can be output, and the output current I 切 , voltage U 切 , conduction time T 切 and output port number J i, uploaded to the upper software, through data comparison and analysis, to accurately determine whether the reverse excitation of the core is completed, forming a fully closed-loop precise control, and realizing a single constant current source as the power supply for multiple reverse excitation modules, realizing automatic reverse excitation of multiple cores in turn, and realizing efficient utilization of constant current sources.

[0013] Furthermore, during the process of switching the control unit to connect the reverse excitation module, the integrated control module disconnects the 380V power output of the program power supply unit. After the switching is completed, the integrated control module turns on the 380V power output of the program power supply unit, switches the current output of the constant current source unit to the next reverse excitation module, and reversely excites the magnetic core in turn, plugging and unplugging without power, thereby increasing the service life of electrical components and providing independent power supply.

[0014] Furthermore, the reverse excitation module is composed of a magnetic core and a reverse excitation coil in a multi-pulse linear induction accelerator.

[0015] Furthermore, the program power supply unit includes a first control unit, a first transformer, a second transformer, a first analog switch, a second analog switch, and a third analog switch; the power input terminals of the first transformer and the second transformer are connected to 380V AC power, and the output terminal of the first transformer is connected to the power input terminal of the first analog switch and the power input terminal of the first control unit through a power line; the output terminal of the second transformer is connected to the power input terminal of the second analog switch and the input terminal of the third analog switch through a power line; the third signal terminal of the first control unit is connected to the second signal terminal of the integrated control module through a communication line to receive and process control signals; the fourth signal terminal of the first control unit is connected to the signal terminals of the first analog switch, the second analog switch, and the third analog switch through a communication line to control the shutdown of the analog switch.

[0016] Furthermore, the 380V AC power outputs a 110V current through the first transformer to provide 110V power for the second control unit and the third control unit, and the first control unit receives the control signal of the integrated control module to control the on and off of the first analog switch, thereby controlling the 110V power output.

[0017] Furthermore, the 380V AC power can output two 380V power supplies to the constant current source unit through the second transformer, and the first control unit receives the control signal of the integrated control module to control the on and off of the second analog switch and the third analog switch, thereby controlling the 380V power supply to be output to the constant current source unit.

[0018] Furthermore, the first analog switch, the second analog switch and the third analog switch adopt all-solid-state devices, which have strong anti-electromagnetic interference capability, can avoid the space electromagnetic field interference generated by the high-voltage discharge of the accelerator and the false triggering caused by the increase of the ground potential, and can ensure stable operation after power-on.

[0019] Furthermore, the constant current source unit includes a second control unit, a third transformer, a variable silicon module, and a first acquisition unit; the power port of the second control unit is connected to the power output end of the first analog switch through a power line and connected to a 110V power supply, the fifth signal end of the second control unit is connected to the second signal end of the receiving integrated control module through a communication line, the sixth signal end of the second control unit is connected to the signal end of the variable silicon module through a communication line, and the seventh signal end of the second control unit is connected to the signal end of the first acquisition unit through a communication line; the power input end of the third transformer is connected to the power output end of the second analog switch or the third analog switch through a power line and connected to a 380V power supply, and the power output end of the third transformer is connected to the power input end of the variable silicon module through a power line; the power output end of the variable silicon module 330 is connected to the power end of the switching control unit 400 through a power line.

[0020] Furthermore, the 380V power supply output by the access program power supply unit of the constant current source unit is transformed by the third transformer according to the core reverse excitation power supply parameters (conduction time T 设 , voltage U 设 、Current I 设 ), after the conversion and distribution control signal of the integrated control module is input to the second control unit, the second control unit receives and outputs the control signal to the variable silicon module, the variable silicon module quickly controls the voltage and rectifies, and outputs a stable and reliable low-voltage DC reverse excitation current I 恒 To the power input terminal of the switching control unit, providing a stable and reliable low-voltage DC current I for the magnetic core reverse excitation system 恒 , safe and reliable, and will not generate strong electromagnetic interference to the outside, and adopts low-voltage data collection, which is convenient for the integration of the whole system and intelligent control.

[0021] Furthermore, the first acquisition unit monitors the output current I in real time 恒 , voltage U 恒 And the conduction time T 恒 The collected signal data is input into the integrated control module through the second control unit, and the integrated control module feeds back to the external industrial computer to determine whether the reverse excitation of the core is completed in this time period, so as to determine whether to switch the reverse excitation module to form a fully closed-loop precise control.

[0022] Furthermore, the first acquisition unit monitors the output current size I of the constant current source unit in real time through a current Hall sensor with high zero sensitivity. 恒 , current recovery accuracy ≤1A.

[0023] Furthermore, the second control unit inputs a 110V power supply output by the first analog switch as a working power supply for the control unit.

[0024] Further, the switching control unit includes a third control unit, a fourth analog switch, a fifth analog switch, an nth analog switch, and a second acquisition unit; the power supply end of the third control unit is connected to the power supply output end of the first analog switch through a power line and connected to a 110V power supply, the eighth signal end of the third control unit is connected to the second signal end of the receiving integrated control module through a communication line, the ninth signal end of the third control unit is connected to the signal ends of the fourth analog switch, the fifth analog switch and the sixth analog switch through a communication line, and the tenth signal end of the third control unit is connected to the signal end of the second acquisition unit through a communication line; the power supply input end of the fourth analog switch, the fifth analog switch and the sixth analog switch is connected to the power supply output end of the variable silicon module 330 through a power line, and the low-voltage DC current I output by the constant current source unit is input. 恒 The fourth analog switch power supply output terminal is connected to the power supply input terminal of the reverse excitation module 1 through a power line, the fifth analog switch power supply output terminal is connected to the power supply input terminal of the reverse excitation module through a power line, and the nth analog switch power supply output terminal is connected to the power supply input terminal of the reverse excitation module m through a power line.

[0025] Furthermore, the switching unit inputs the low voltage direct current I output by the constant current source unit. 恒 According to the automatic reverse excitation instruction given by the external industrial computer, the control signal is converted and distributed to the third control unit through the integrated control module. The third control unit outputs the control signal to the fourth analog switch, the fifth analog switch and the nth analog switch in sequence according to the program setting timing, and turns on and off the analog switches in sequence to ensure that only one reverse excitation module is always working in the set time period, thereby outputting the low-voltage DC current I in sequence. 恒 To each reverse excitation module, reverse excitation of multiple multi-pulse linear induction accelerator cores can be fully automatically realized, which improves the efficiency of the accelerator reverse excitation core, realizes a single constant current source as the power supply of multiple reverse excitation modules, and realizes efficient utilization of constant current source; DC reverse excitation uses low voltage, which is safe and reliable, and will not generate strong electromagnetic interference to the outside, and uses low voltage to collect data, which is convenient for the integration of the whole system and intelligent control.

[0026] Furthermore, the switching unit inputs the low voltage direct current I output by the constant current source unit. 恒 According to a manual reverse excitation instruction given by an external industrial computer, the integrated control module 100 converts and distributes the control signal to the third control unit, and the third control unit outputs the control signal to the corresponding analog switch, turns on and off the analog switch, and outputs a low-voltage DC current I 恒 To the corresponding reverse excitation module.

[0027] Furthermore, during the process of switching the analog switch by the switching switch unit, when the reverse excitation of the previous reverse excitation module is completed, the second acquisition unit feeds back the current data signal to the third control unit, the integrated control module receives the signal data fed back by the third control unit, disconnects the 380V power output of the program power supply unit, and plugs in and out without power, thereby increasing the service life of electrical components and providing independent power supply.

[0028] Furthermore, the second acquisition unit monitors the output current I in real time 切 , voltage U 切 , conduction time T 切 and output port number J i The collected signal data is input into the integrated control module through the third control unit, and the integrated control module feeds back to the external industrial computer to determine whether the reverse excitation module works effectively during the time period, thereby determining whether to switch the reverse excitation module to form a fully closed-loop precise control.

[0029] Furthermore, the second acquisition unit monitors the output current in real time through a current Hall sensor with high zero sensitivity, and the current acquisition accuracy is ≤1A.

[0030] Furthermore, the third control unit inputs the 110V power supply output by the first analog switch as a working power supply for the control unit.

[0031] Furthermore, the fourth analog switch, the fifth analog switch, and the nth analog switch are all-solid-state devices, which have strong anti-electromagnetic interference capabilities, can avoid the space electromagnetic field interference generated by the accelerator's high-voltage discharge and the false triggering caused by the increase in ground potential, and can ensure stable operation after power-on.

[0032] Second aspect:

[0033] A magnetic core reverse excitation method for a multi-pulse linear induction accelerator, wherein the reverse excitation system is divided into automatic reverse excitation mode and manual reverse excitation mode, and comprises the following steps:

[0034] S1. Set the reverse excitation core time T of the reverse excitation system 设 , voltage U 设 、Current I 设 To the external industrial computer;

[0035] S2, select automatic / manual reverse excitation mode. If automatic mode is selected, proceed to the next step. If manual mode is selected, adjust to S;

[0036] S3, the integrated control module converts and distributes instructions to the program power supply unit and the constant current source unit;

[0037] S4, the program power supply unit receives the control instruction of the integrated control module, outputs two 380V power supplies to the constant current source unit, and outputs one 110V power supply to provide power for all downstream control units;

[0038] S5, constant current source unit quickly controls voltage and rectifies 380V current, outputting standard set power;

[0039] S6, the switching control unit turns on and off each branch in turn, and provides power to each branch reverse excitation module in turn;

[0040] S7, the reverse excitation current Icut, voltage Ucut, conduction time Tcut and output port number Ji collected by the switching control unit are fed back to the external industrial computer through the integrated control module, and the conduction time T 设 , voltage U 设 , Current I Set up comparative analysis, if it meets the standard, proceed to the next step, if it does not meet the standard, adjust to S10, and re-reverse excitation of the shunt core separately;

[0041] S8, the switching control unit 400 collects the branch channel number J i , through the integrated control module to the external industrial computer, through the reverse excitation circuit number J m Compare and analyze. If the standard is met, proceed to the next step. If not, channel number i=i+1, adjust to S6, switch the control unit to connect to the next reverse excitation module J i ;

[0042] S9, the reverse excitation of the magnetic core is completed, and the system is shut down;

[0043] S10, when a branch magnetic core needs to be manually reversely excited, the external industrial computer records the branch channel number J;

[0044] S11, the integrated control module converts and distributes instructions to the program power supply unit and the constant current source unit;

[0045] S12, the program power supply unit receives the control instruction of the integrated control module, outputs 380V power to the constant current source unit, and outputs a 110V power supply to provide power for all downstream control units;

[0046] S13, constant current source unit quickly controls voltage and rectifies 380V current, outputting standard set power;

[0047] S14, the switching control unit turns on the branch to provide power to the reverse excitation module of the branch;

[0048] S15, the reverse excitation current Icut, voltage Ucut, conduction time Tcut and output port number Ji collected by the switching control unit are fed back to the external industrial computer through the integrated control module, and compared with the set conduction time Tset, voltage Uset and current Iset. If they meet the standards, jump to S9; if not, adjust to S14 and continue to reverse excite the shunt core again.

[0049] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0050] 1. Use standard constant current source to reverse excite the magnetic core and output low voltage and steady current power supply, which will not generate strong electromagnetic interference to the outside, and is safe and reliable;

[0051] 2. DC reverse excitation collects data at low voltage, facilitating the integration of the entire system and intelligent control

[0052] 3. Through the multi-channel switching control of the constant current source, a single constant current source can be used as the power supply for multiple reverse excitation modules, and multiple magnetic cores can be reversely excited in sequence automatically, thus realizing efficient utilization of the constant current source;

[0053] 4. Through the constant current source multi-channel switching control, the core of the multi-pulse linear induction accelerator is automatically reversely excited in full closed loop in sequence, which improves the reverse excitation efficiency of the accelerator's core and realizes high-precision and high-efficiency reverse excitation of the core. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Figure 1 It is a structural schematic diagram of a magnetic core reverse excitation system applied to a multi-pulse linear induction accelerator according to the present invention;

[0055] Figure 2 It is a structural schematic diagram of a program power supply unit of a magnetic core reverse excitation system applied to a multi-pulse linear induction accelerator according to the present invention;

[0056] Figure 3 It is a structural schematic diagram of a constant current source of a magnetic core reverse excitation system applied to a multi-pulse linear induction accelerator according to the present invention;

[0057] Figure 4 It is a schematic diagram of the structure of a switching control unit of a magnetic core reverse excitation system applied to a multi-pulse linear induction accelerator according to the present invention;

[0058] Figure 5 The present invention is a schematic diagram of the working process of the magnetic core reverse excitation system applied to a multi-pulse linear induction accelerator.

[0059] Figure 6 The present invention is a schematic diagram of a 96-channel magnetic core reverse excitation structure of a magnetic core reverse excitation system applied to a multi-pulse linear induction accelerator.

[0060] The figure numbers are as follows: integrated control module 100, program power supply unit 200, constant current source unit 300, switching control unit 400, reverse excitation module 500, first control unit 210, first transformer 220, second transformer 221, first analog switch 230, second analog switch 231, third analog switch 232, second control unit 310, third transformer 320, variable silicon module 330, first acquisition unit 340, third control unit 410, fourth analog switch 420, fifth analog switch 421, sixth analog switch 422, second acquisition unit 430. DETAILED DESCRIPTION

[0061] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0062] The detailed implementation of the present invention is further described below in conjunction with the accompanying drawings and technical solutions.

[0063] like Figure 1 As shown, the present invention is applied to the magnetic core reverse excitation system of the multi-pulse linear induction accelerator, comprising an integrated control module 100, a program power supply unit 200, a constant current source unit 300, a switching control unit 400, and a plurality of reverse excitation modules 500. The first signal port of the integrated control module 100 is connected to an external industrial computer through an optical fiber; the second signal port of the integrated control module 100 is respectively connected to the signal ends of the program power supply unit 200, the constant current source unit 300 and the switching control unit 400 through a communication line; the power output end of the program power supply unit 200 is respectively connected to the power input end of the constant current source unit 300 and the switching switch unit 400 through a power line; the power output end of the constant current source unit 300 is connected to the power input end of the switching switch unit 400 through a power line; and the switching control unit 400 is connected to the power end of the plurality of reverse excitation modules 500 through a power line.

[0064] The first signal port of the integrated control module 100 is connected to an external industrial computer through an optical fiber, receives and converts instructions issued by the upper software of the external industrial computer, and outputs control signals to the program power supply unit 200, the constant current source unit 300 and the switching control unit 400, thereby controlling the power output of the program power supply unit 200 and the constant current source unit 300 and the switch conduction of the switching control unit 400; at the same time, the feedback signals collected by the constant current source unit and the switching control unit are input to the second signal port of the integrated control module through the communication line.

[0065] The integrated control unit 100 is independently developed and manufactured using domestic high-performance chips, and the communication interface uses photoelectric isolation, which has strong anti-electromagnetic interference capabilities.

[0066] The program power supply unit 200 is externally connected to a 380V mains input, outputs a 110V power supply to provide power for all control units, and outputs two 380V power supplies to the constant current source unit 300.

[0067] The constant current source unit 300 inputs the 380V power supply output by the program power supply unit 200, and the core reverse excitation power supply parameters (on time T 设 , voltage U 设 、Current I 设 ) as a reference, fast voltage control and rectification, output low voltage DC current I 恒 , and real-time monitoring of the output current I 恒 , voltage U 恒 And the conduction time T 恒 , uploaded to the upper software, and through data comparison and analysis, it is used to accurately determine whether the reverse excitation of the core is completed, forming a fully closed-loop precise control.

[0068] The constant current source unit 300 provides a stable and reliable low-voltage DC reverse excitation current for the magnetic core of the magnetic core reverse excitation module 500, which is safe and reliable and will not generate strong electromagnetic interference to the outside.

[0069] The switching control unit 400 converts the control signal distributed by the integrated control module 100 according to the automatic or manual reverse excitation command given by the external industrial computer, and outputs the constant current source unit 300 output low-voltage DC current I in sequence according to the program-set timing or manual control. 恒 To each reverse excitation module 500, and in the set time period, only one low-voltage DC reverse excitation current can be output, and the output current I is monitored in real time. 切 , voltage U 切 , conduction time T 切 and output port number J i , uploaded to the upper software, through data comparison and analysis, to accurately determine whether the reverse excitation of the magnetic core is completed, forming a fully closed-loop precise control, and realizing a single constant current source as the power supply of multiple reverse excitation modules 500, realizing full-automatic reverse excitation of multiple magnetic cores in turn, and realizing efficient utilization of constant current sources.

[0070] During the process of switching the control unit 400 to connect the reverse excitation module 500, the integrated control module 100 disconnects the 380V power output of the program power supply unit. After the switching is completed, the integrated control module 100 turns on the 380V power output of the program power supply unit, switches the current output of the constant current source unit 300 to the next reverse excitation module 500, and reversely excites the magnetic core in turn, plugs in and out without power, thereby increasing the service life of electrical components and providing independent power supply.

[0071] The reverse excitation module 500 is composed of a magnetic core and a reverse excitation coil in a multi-pulse linear induction accelerator.

[0072] like Figure 2 As shown, the program power supply unit 200 includes a first control unit 210, a first transformer 220, a second transformer 221, a first analog switch 230, a second analog switch 231, and a third analog switch 232; the power input terminals of the first transformer 220 and the second transformer 221 are connected to 380V AC power, and the output terminal of the first transformer 220 is connected to the power input terminal of the first analog switch 230 and the power input terminal of the first control unit 210 through a power line; the output terminal of the second transformer 221 is connected to the power input terminal of the second analog switch 231 and the input terminal of the third analog switch 232 through a power line; the third signal terminal of the first control unit 210 is connected to the second signal terminal of the integrated control module 100 through a communication line to receive and process control signals; the fourth signal terminal of the first control unit 210 is connected to the signal terminals of the first analog switch 230, the second analog switch 231, and the third analog switch 232 through a communication line to control the shutdown of the analog switch.

[0073] The 380V AC power outputs a 110V current through the first transformer 220 to provide 110V power for the second control unit 310 and the third control unit 410, and the first control unit 210 receives the control signal of the integrated control module 100 to control the on and off of the first analog switch 230, thereby controlling the 110V power output.

[0074] The 380V AC power can output two 380V power supplies to the constant current source unit 300 through the second transformer 221, and the first control unit 210 receives the control signal of the integrated control module 100 to control the on and off of the second analog switch 231 and the third analog switch 232, thereby controlling the 380V power supply to be output to the constant current source unit 300.

[0075] The first analog switch 230, the second analog switch 231 and the third analog switch 232 are all solid-state devices, which have strong anti-electromagnetic interference capabilities, can avoid the space electromagnetic field interference generated by the high-voltage discharge of the accelerator and the false triggering caused by the increase of the ground potential, and can ensure stable operation after power-on.

[0076] like Figure 3As shown, the constant current source unit 300 includes a second control unit 310, a third transformer 320, a variable silicon module 330, and a first acquisition unit 340; the power port of the second control unit 310 is connected to the power output end of the first analog switch 230 through a power line, and is connected to a 110V power supply. The fifth signal end of the second control unit 310 is connected to the second signal end of the receiving integrated control module 100 through a communication line, and the sixth signal end of the second control unit 310 is connected to the signal end of the variable silicon module 330 through a communication line. The seventh signal end of the second control unit 310 is connected to the signal end of the first acquisition unit 340 through a communication line; the power input end of the third transformer 320 is connected to the power output end of the second analog switch 231 or the third analog switch 232 through a power line, and is connected to a 380V power supply. The power output end of the third transformer 320 is connected to the power input end of the variable silicon module 330 through a power line; the power output end of the variable silicon module 330 is connected to the power end of the switching control unit 400 through a power line.

[0077] The 380V power supply output by the program power supply unit 200 of the constant current source unit 300 is transformed by the third transformer 320 according to the core reverse excitation power supply parameters (on time T 设 , voltage U 设 、Current I 设 ), after the conversion distribution control signal of the integrated control module 100 is input to the second control unit 310, the second control unit 310 receives and outputs the control signal to the variable silicon module 330, the variable silicon module 310 quickly controls the voltage and rectifies, and outputs a stable and reliable low-voltage DC reverse excitation current I 恒 To the power input terminal of the switching control unit 400, a stable and reliable low-voltage DC current I is provided for the magnetic core reverse excitation system. 恒 , safe and reliable, and will not generate strong electromagnetic interference to the outside, and adopts low-voltage data collection, which is convenient for the integration of the whole system and intelligent control.

[0078] The first acquisition unit 340 monitors the output current I in real time. 恒 , voltage U 恒 And the conduction time T 恒 The collected signal data is input into the integrated control module 100 through the second control unit 310, and the integrated control module 100 feeds back to the external industrial computer to determine whether the reverse excitation of the core is completed in this time period, so as to determine whether to switch the reverse excitation module to form a fully closed-loop precise control.

[0079] The first acquisition unit 340 monitors the current magnitude Iconstant of the output constant current source unit 300 in real time through a current Hall sensor with high zero sensitivity, and the current acquisition accuracy is ≤1A.

[0080] The second control unit 310 inputs the 110V power supply output by the first analog switch 230 as the working power supply of the control unit.

[0081] like Figure 4 As shown, the switching control unit 400 includes a third control unit 410, a fourth analog switch 420, a fifth analog switch 421, an nth analog switch 42i, and a second acquisition unit 430; the power supply end of the third control unit 410 is connected to the power supply output end of the first analog switch 230 through a power line, and is connected to a 110V power supply, the eighth signal end of the third control unit 410 is connected to the second signal end of the receiving integrated control module 100 through a communication line, the ninth signal end of the third control unit 410 is connected to the signal ends of the fourth analog switch 420, the fifth analog switch 421 and the sixth analog switch 42i through a communication line, and the tenth signal end of the third control unit 410 is connected to the signal end of the second acquisition unit 430 through a communication line; the power supply input end of the fourth analog switch 420, the fifth analog switch 421 and the sixth analog switch 42i is connected to the power supply output end of the variable silicon module 330 through a power line, and the low-voltage DC current I output by the constant current source unit 300 is input. 恒 The power output terminal of the fourth analog switch 420 is connected to the power input terminal of the reverse excitation module 1 through a power line, and the power output terminal of the nth analog switch 42i is connected to the input terminal of the reverse excitation module m through a power line.

[0082] The switching unit 400 inputs the low voltage DC current I output by the constant current source unit. 恒 According to the automatic reverse excitation instruction given by the external industrial computer, the control signal is converted and distributed to the third control unit 410 through the integrated control module. The third control unit 410 outputs the control signal to the fourth analog switch 420, the fifth analog switch 421 and the nth analog switch 42i in sequence according to the program-controlled timing, and turns on and off the analog switches in sequence, ensuring that only one reverse excitation module is always working in the set time period, thereby outputting the low-voltage DC current I in sequence. 恒 To each reverse excitation module, reverse excitation of multiple multi-pulse linear induction accelerator cores can be fully automatically realized, which improves the efficiency of the accelerator reverse excitation core, realizes a single constant current source as the power supply of multiple reverse excitation modules, and realizes efficient utilization of constant current source; DC reverse excitation uses low voltage, which is safe and reliable, and will not generate strong electromagnetic interference to the outside, and uses low voltage to collect data, which is convenient for the integration of the whole system and intelligent control.

[0083] The switching unit 400 inputs the low voltage DC current I output by the constant current source unit 300. 恒According to a manual reverse excitation instruction given by an external industrial computer, the integrated control module 100 converts and distributes the control signal to the third control unit 410, and the third control unit 410 outputs the control signal to the corresponding analog switch, turns on and off the analog switch, and outputs a low-voltage DC current I 恒 To the corresponding reverse excitation module 500.

[0084] During the process of switching the analog switch by the switching unit 400, when the reverse excitation of the previous reverse excitation module 500 is completed, the second acquisition unit 430 feeds back the current data signal to the third control unit 410, and the integrated control module 100 receives the signal data fed back by the third control unit 410, disconnects the 380V power output of the program power supply unit 200, and plugs in and out without power, thereby increasing the service life of electrical components and providing independent power supply.

[0085] The second acquisition unit 430 monitors the output current I in real time. 切 , voltage U 切 , conduction time T 切 and output port number J i The collected signal data is input into the integrated control module 100 through the third control unit 410, and the integrated control module 100 feeds back to the external industrial computer to determine whether the reverse excitation module works effectively during the time period, thereby determining whether to switch the reverse excitation module to form a fully closed-loop precise control.

[0086] The second acquisition unit 430 monitors the output current in real time through a current Hall sensor with high zero sensitivity, and the current acquisition accuracy is ≤1A.

[0087] The third control unit 410 inputs the 110V power supply output by the first analog switch 230 as the working power supply of the control unit.

[0088] Among them, the fourth analog switch 420, the fifth analog switch 421, and the nth analog switch 42i adopt all-solid-state devices, which have strong anti-electromagnetic interference capabilities, can avoid the space electromagnetic field interference generated by the high-voltage discharge of the accelerator and the false triggering caused by the increase of the ground potential, and can ensure stable operation after power-on.

[0089] like Figure 5 As shown, a magnetic core reverse excitation method for a multi-pulse linear induction accelerator, the reverse excitation system is divided into automatic reverse excitation mode and manual reverse excitation mode, including the following steps:

[0090] S1. Set the reverse excitation core time T of the reverse excitation system 设 , voltage U 设 、Current I 设 To the external industrial computer;

[0091] S2, select automatic / manual reverse excitation mode. If automatic mode is selected, proceed to the next step. If manual mode is selected, adjust to S;

[0092] S3, the integrated control module 100 converts and distributes instructions to the program power supply unit 200 and the constant current source unit 300;

[0093] S4, the program power supply unit 200 receives the control instruction of the integrated control module 100, outputs two 380V power supplies to the constant current source unit 300, and outputs one 110V power supply to provide power for all downstream control units;

[0094] S5, constant current source unit 300 quickly controls voltage and rectifies 380V current, outputting standard set power;

[0095] S6, the switching control unit 400 turns on and off each branch in turn, and provides power to each branch reverse excitation module in turn;

[0096] S7, switching the reverse excitation current I collected by the control unit 400 切 , voltage U 切 , conduction time T 切 and output port number J i , is fed back to the external industrial computer through the integrated control module 100, and is connected to the set conduction time T 设 , voltage U 设 、Current I 设 Compare and analyze. If the standard is met, proceed to the next step. If not, adjust to S10 and re-reverse excite the shunt core separately.

[0097] S8, the switching control unit 400 collects the branch channel number J i , is fed back to the external industrial computer through the integrated control module 100, and is connected to the set reverse excitation path number J m Compare and analyze, if the standard is met, execute the next step, if not, channel number i=i+1, adjust to S6, switch control unit 400 to switch to the reverse excitation module J i ;

[0098] S9, the reverse excitation of the magnetic core is completed, and the system is shut down;

[0099] S10, when a branch core needs to be manually reversed, the external industrial computer records the branch channel number J 设 ;

[0100] S11, the integrated control module 100 converts and distributes instructions to the program power supply unit 200 and the constant current source unit 300;

[0101] S12, the program power supply unit 200 receives the control instruction of the integrated control module 100, outputs 380V power to the constant current source unit 300, and outputs a 110V power to provide power for all downstream control units;

[0102] S13, the constant current source unit 300 quickly controls the voltage and rectifies the 380V current, and outputs the standard set power;

[0103] S14, the switching control unit 400 turns on the branch to provide power to the reverse excitation module of the branch;

[0104] S15, switching the reverse excitation current I collected by the control unit 400 切 , voltage U 切 , conduction time T 切 and output port number J i , is fed back to the external industrial computer through the integrated control module 100, and the set conduction time T 设 , voltage U 设 、Current I 设 Compare and analyze. If the standard is met, jump to S9. If the standard is not met, adjust to S14 and continue to reversely excite the shunt core.

[0105] like Figure 6As shown, a 96-channel magnetic core reverse excitation system for a multi-pulse linear induction accelerator is mainly composed of 2 constant current sources, 8 switching control boxes, 1 integrated control module 100, and 1 program power supply unit 200. The integrated control module 100 receives and converts instructions issued by the upper software of the external industrial computer, and outputs control signals to the program power supply unit 200, the 2 constant current sources and the 8 switching control boxes, thereby controlling the power output of the program power supply unit 200, the constant current source 1 and the constant current source 2. The program power supply unit outputs a 110V power supply to provide power for all control units, and outputs 2 380V power supplies to the constant The current source unit 300, the constant current source unit 300 is composed of a constant current source 1 and a constant current source 2, the switching control unit 400 is composed of 8 switching control boxes, each constant current source is connected to 4 switching control boxes, each switching control box corresponds to 12 reverse excitation modules, the constant current source 1 provides reverse excitation current for reverse excitation modules No. 1 to 48, and the constant current source 2 provides reverse excitation current for reverse excitation modules No. 49 to 96. One constant current source can only reset the magnetic core of one reverse excitation module at the same time. The two constant current sources work independently, and the entire system can reverse excite two magnetic cores at the same time, thereby improving the reverse excitation efficiency. When the magnetic core reverse excitation system is working, the command issued by the upper software of the industrial computer is automatically converted and distributed by the integrated control unit 100, and the constant current source 1 and constant current source 2 and the corresponding switching control box are input respectively. The analog switch in the switching control box is turned on and off in sequence according to the program-set timing to ensure that only one current can be output in the set time period. At the same time, the switching control box collects the port number, conduction time and output current value of the current output end, and feeds back to the upper software through the integrated control unit 100; at the same time, the output current, voltage and time data of the constant current source 1 and the constant current source 2 are also uploaded to the upper software. Through comparative analysis with the set magnetic core reverse excitation data, a judgment is made as to whether the reverse excitation module corresponding to the time period is effectively reversely excited, and a signal of whether the magnetic core is reversely excited or not is given on the software side, forming a full closed-loop precise control to achieve high-precision reverse excitation magnetic core. A 96-channel magnetic core reverse excitation system for a multi-pulse linear induction accelerator. The system fully automatically and fully closed-loop realizes reverse excitation of multiple magnetic cores of multi-pulse linear induction accelerators, thereby improving the efficiency of reverse excitation of the accelerator magnetic cores. The reverse excitation adopts low voltage, which is safe and reliable, and will not generate strong electromagnetic interference to the outside. Low voltage is used for data collection, which is convenient for the integration of the whole system and intelligent control.

[0106] The present invention aims to provide a magnetic core reverse excitation system for a multi-pulse linear induction accelerator, which outputs a low-voltage and stable-current power supply to a reverse excitation module through a constant current source, does not generate strong electromagnetic interference to the outside, is safe and reliable, and automatically reverse excites multiple magnetic cores in sequence through multi-channel switching control of the constant current source, realizes a single constant current source as a power supply for multiple reverse excitation modules, improves the reverse excitation efficiency of the accelerator, realizes efficient utilization of the constant current source, and reverse excites multiple magnetic cores with high precision and high efficiency.

[0107] Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. Any technician familiar with the art can make many possible changes and modifications to the technical solution of the present invention by using the technical content disclosed above without departing from the scope of the technical solution of the present invention, or modify it into an equivalent embodiment of equivalent changes. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention should fall within the scope of protection of the technical solution of the present invention.

Claims

1. A magnetic core reverse excitation system for a multi-pulse linear induction accelerator, characterized in that: It includes an integrated control module, a program power supply unit, a constant current source unit, a switching control unit and multiple reverse excitation modules. The first signal port of the integrated control module is connected to an external industrial computer through an optical fiber; the second signal port of the integrated control module is respectively connected to the signal ends of the program power supply unit, the constant current source unit and the switching control unit through a communication line; the power output end of the program power supply unit is respectively connected to the power input ends of the constant current source unit and the switching switch unit through a power line; the power output end of the constant current source unit is connected to the power input end of the switching switch unit through a power line; and the switching control unit is connected to the power ends of multiple reverse excitation modules through a power line.

2. The magnetic core reverse excitation system for a multi-pulse linear induction accelerator according to claim 1, characterized in that: The first signal port of the integrated control module is connected to an external industrial computer through an optical fiber, receives and converts instructions issued by the upper software of the external industrial computer, and outputs control signals to the program power supply unit, the constant current source unit and the switching control unit, thereby controlling the power output of the program power supply unit and the constant current source unit and the switch conduction of the switching control unit; at the same time, the feedback signals collected by the constant current source unit and the switching control unit are input to the second signal port of the integrated control module through the communication line.

3. The core reverse excitation system for a multi-pulse linear induction accelerator according to claim 1, characterized in that: The program power supply unit is externally connected to a 380V mains input, outputs a 110V power supply to provide power for all control units, and outputs two 380V power supplies to the constant current source unit.

4. A magnetic core reverse excitation system for a multi-pulse linear induction accelerator according to claim 1 or 3, characterized in that: The constant current source unit inputs the program power supply unit output power, and according to the core reverse excitation power supply parameters of the multi-pulse linear induction accelerator set by the external industrial computer as a reference, quickly controls the voltage and rectifies, and outputs a low-voltage DC current I 恒 , and real-time monitoring of the output current I 恒 , voltage U 恒 And the conduction time T 恒 , uploaded to the upper software, and through data comparison and analysis, it is determined whether the reverse excitation of the core is completed, forming a full closed-loop precise control.

5. The magnetic core reverse excitation system for a multi-pulse linear induction accelerator according to claim 4, characterized in that: The switching control unit outputs the low-voltage DC current I in sequence according to the automatic or manual reverse excitation command given by the external industrial computer and the control signal converted and distributed by the integrated control module according to the program-controlled timing or manual control. 恒 To each reverse excitation module, and in the set time period, there is always only one low-voltage DC reverse excitation current output, and through real-time monitoring of the output current I 切 , voltage U 切 , conduction time T 切 and output port number J i , uploaded to the upper software, through data comparison and analysis, to accurately determine whether the reverse excitation of the core is completed, forming a fully closed-loop precise control, and realizing a single constant current source as the power supply for multiple reverse excitation modules, realizing automatic reverse excitation of multiple cores in turn, and realizing efficient utilization of constant current sources.

6. The magnetic core reverse excitation system for a multi-pulse linear induction accelerator according to claim 1, characterized in that: During the process of switching the control unit to connect the reverse excitation module, the integrated control module disconnects the power output of the program power supply unit. After the switching is completed, the integrated control module turns on the power output of the program power supply unit, switches the current output of the constant current source unit to the next reverse excitation module, and reversely excites the magnetic core in turn, plugs in and out without power, thereby increasing the service life of electrical components and providing independent power supply.

7. The magnetic core reverse excitation system for a multi-pulse linear induction accelerator according to claim 1, characterized in that: The reverse excitation module is composed of a magnetic core and a reverse excitation coil in a multi-pulse linear induction accelerator.

8. The magnetic core reverse excitation system for a multi-pulse linear induction accelerator according to claim 1, characterized in that: The program power supply unit includes a first control unit, a first transformer, a second transformer, a first analog switch, a second analog switch, and a third analog switch; the power input ends of the first transformer and the second transformer are connected to 380V mains electricity, and the output end of the first transformer is connected to the power input end of the first analog switch and the power input end of the first control unit through a power line; The output end of the second transformer is connected to the power input end of the second analog switch and the input end of the third analog switch through a power line; the third signal end of the first control unit is connected to the second signal end of the integrated control module through a communication line to receive and process the control signal; the fourth signal end of the first control unit is connected to the signal ends of the first analog switch, the second analog switch, and the third analog switch through a communication line to control the shutdown of the analog switch.

9. The magnetic core reverse excitation system for a multi-pulse linear induction accelerator according to claim 8, characterized in that: The 380V AC power can output two 380V power supplies to the constant current source unit through the second transformer, and the first control unit receives the control signal of the integrated control module to control the on and off of the second analog switch and the third analog switch, thereby controlling the 380V power supply to be output to the constant current source unit.

10. The magnetic core reverse excitation system for a multi-pulse linear induction accelerator according to claim 9, characterized in that: The constant current source unit includes a second control unit, a third transformer, a variable silicon module, and a first acquisition unit; the power port of the second control unit is connected to the power output end of the first analog switch through a power line and connected to a 110V power supply, the fifth signal end of the second control unit is connected to the second signal end of the receiving integrated control module through a communication line, the sixth signal end of the second control unit is connected to the signal end of the variable silicon module through a communication line, and the seventh signal end of the second control unit is connected to the signal end of the first acquisition unit through a communication line; the power input end of the third transformer is connected to the power output end of the second analog switch or the third analog switch through a power line and connected to a 380V power supply, the power output end of the third transformer is connected to the power input end of the variable silicon module through a power line; the power output end of the variable silicon module is connected to the power end of the switching control unit through a power line.

11. The magnetic core reverse excitation system for a multi-pulse linear induction accelerator according to claim 10, characterized in that: The access program power supply unit outputs power supply of the constant current source unit, and after being transformed by the third transformer, the control signal is input to the second control unit through the conversion distribution control signal of the integrated control module according to the core reverse excitation power supply parameters of the multi-pulse linear induction accelerator given by the external industrial computer. The second control unit receives and outputs the control signal to the variable silicon module, and the variable silicon module quickly controls the voltage and rectifies to output a stable and reliable low-voltage DC reverse excitation current I 恒 To the power input terminal of the switching control unit, providing a stable and reliable low-voltage DC current I for the magnetic core reverse excitation system 恒 , safe and reliable, and will not generate strong electromagnetic interference to the outside, and adopts low-voltage data collection, which is convenient for the integration of the whole system and intelligent control.

12. The magnetic core reverse excitation system for a multi-pulse linear induction accelerator according to claim 11, characterized in that: The 380V AC power outputs a 110V current through the first transformer to provide a 110V power supply for the second control unit, and the first control unit receives a control signal from the integrated control module to control the on and off of the first analog switch, thereby controlling the 110V power output.

13. The magnetic core reverse excitation system for a multi-pulse linear induction accelerator according to claim 11, characterized in that: The first acquisition unit monitors the output current I in real time 恒 , voltage U 恒 And the conduction time T 恒 The collected signal data is input into the integrated control module through the second control unit, and the integrated control module feeds back to the external industrial computer to determine whether the reverse excitation of the core is completed in this time period, so as to determine whether to switch the reverse excitation module to form a fully closed-loop precise control.

14. The magnetic core reverse excitation system for a multi-pulse linear induction accelerator according to claim 13, characterized in that: The first acquisition unit monitors the output current size I of the constant current source unit in real time through a high zero sensitivity current Hall sensor 恒 , current recovery accuracy ≤1A.

15. The magnetic core reverse excitation system for a multi-pulse linear induction accelerator according to claim 12, characterized in that: The second control unit inputs the 110V power supply output by the first analog switch as a working power supply for the control unit.

16. The magnetic core reverse excitation system for a multi-pulse linear induction accelerator according to claim 11, characterized in that: The switching control unit includes a third control unit, a fourth analog switch, a fifth analog switch, an nth analog switch, and a second acquisition unit; the power supply end of the third control unit is connected to the power supply output end of the first analog switch through a power line, and is connected to a 110V power supply; the eighth signal end of the third control unit is connected to the second signal end of the receiving integrated control module through a communication line; the ninth signal end of the third control unit is connected to the signal ends of the fourth analog switch, the fifth analog switch, and the sixth analog switch through a communication line; the tenth signal end of the third control unit is connected to the signal end of the second acquisition unit through a communication line; the power supply input end of the fourth analog switch, the fifth analog switch, and the sixth analog switch is connected to the power supply output end of the variable silicon module 330 through a power line, and the low-voltage DC current I output by the constant current source unit is input. 恒 The fourth analog switch power supply output terminal is connected to the power supply input terminal of the reverse excitation module 1 through a power line, the fifth analog switch power supply output terminal is connected to the power supply input terminal of the reverse excitation module through a power line, and the nth analog switch power supply output terminal is connected to the power supply input terminal of the reverse excitation module m through a power line.

17. The magnetic core reverse excitation system for a multi-pulse linear induction accelerator according to claim 16, characterized in that: The 380V AC power outputs a 110V current through the first transformer to provide a 110V power supply for the third control unit, and the first control unit receives a control signal from the integrated control module to control the on and off of the first analog switch, thereby controlling the 110V power output.

18. The magnetic core reverse excitation system for a multi-pulse linear induction accelerator according to claim 16, characterized in that: The switching unit inputs the low voltage DC current I output by the constant current source unit 恒 According to the automatic reverse excitation instruction given by the external industrial computer, the control signal is converted and distributed to the third control unit through the integrated control module. The third control unit outputs the control signal to the fourth analog switch, the fifth analog switch and the nth analog switch in sequence according to the program setting timing, and turns on and off the analog switches in sequence to ensure that only one reverse excitation module is always working in the set time period, thereby outputting the low-voltage DC current I in sequence. 恒 To each reverse excitation module, reverse excitation of multiple multi-pulse linear induction accelerator cores can be fully automatically realized, which improves the efficiency of the accelerator reverse excitation core, realizes a single constant current source as the power supply of multiple reverse excitation modules, and realizes efficient utilization of constant current source; DC reverse excitation uses low voltage, which is safe and reliable, and will not generate strong electromagnetic interference to the outside, and uses low voltage to collect data, which is convenient for the integration of the whole system and intelligent control.

19. The magnetic core reverse excitation system for a multi-pulse linear induction accelerator according to claim 17, characterized in that: The switching unit inputs the low voltage DC current I output by the constant current source unit 恒 According to a manual reverse excitation instruction given by an external industrial computer, the integrated control module 100 converts and distributes the control signal to the third control unit, and the third control unit outputs the control signal to the corresponding analog switch, turns on and off the analog switch, and outputs a low-voltage DC current I 恒 To the corresponding reverse excitation module.

20. The magnetic core reverse excitation system for a multi-pulse linear induction accelerator according to claim 19, characterized in that: During the process of switching the analog switch by the switching switch unit, when the reverse excitation of the previous reverse excitation module is completed, the second acquisition unit feeds back the current data signal to the third control unit, the integrated control module receives the signal data fed back by the third control unit, disconnects the power output of the program power supply unit, and plugs in and out without power, thereby increasing the service life of the electrical components and providing independent power supply.

21. The magnetic core reverse excitation system for a multi-pulse linear induction accelerator according to claim 16, characterized in that: The second acquisition unit monitors the output current I in real time 切 , voltage U 切 , conduction time T 切 and output port number J i The collected signal data is input into the integrated control module through the third control unit, and the integrated control module feeds back to the external industrial computer to determine whether the reverse excitation module works effectively during the time period, thereby determining whether to switch the reverse excitation module to form a fully closed-loop precise control.

22. The magnetic core reverse excitation system for a multi-pulse linear induction accelerator according to claim 16, characterized in that: The second acquisition unit monitors the output current in real time through a high zero-sensitivity current Hall sensor, and the current acquisition accuracy is ≤1A.

23. The magnetic core reverse excitation system for a multi-pulse linear induction accelerator according to claim 17, characterized in that: The third control unit inputs the 110V power supply output by the first analog switch as a working power supply for the control unit.

24. The magnetic core reverse excitation system for a multi-pulse linear induction accelerator according to claim 16, characterized in that: The fourth analog switch, the fifth analog switch and the nth analog switch are all-solid-state devices, which have strong anti-electromagnetic interference capability, can avoid the space electromagnetic field interference generated by the high-voltage discharge of the accelerator and the false triggering caused by the increase of the ground potential, and can ensure stable operation after power-on.

25. A magnetic core reverse excitation method for a multi-pulse linear induction accelerator, characterized in that: The reverse excitation system is divided into automatic reverse excitation and manual reverse excitation modes, including the following steps: S1. Set the reverse excitation core time T of the reverse excitation system 设 , voltage U 设 、Current I 设 To the external industrial computer; S2, select automatic / manual reverse excitation mode. If automatic mode is selected, proceed to the next step. If manual mode is selected, adjust to S; S3, the integrated control module converts and distributes instructions to the program power supply unit and the constant current source unit; S4, the program power supply unit receives the control instruction of the integrated control module, outputs two 380V power supplies to the constant current source unit, and outputs one 110V power supply to provide power for all downstream control units; S5, constant current source unit quickly controls voltage and rectifies 380V current, outputting standard set power; S6, the switching control unit turns on and off each branch in turn, and provides power to each branch reverse excitation module in turn; S7, the reverse excitation current Icut, voltage Ucut, conduction time Tcut and output port number Ji collected by the switching control unit are fed back to the external industrial computer through the integrated control module, and the conduction time T 设 , voltage U 设 , Current I Set up comparative analysis, if it meets the standard, proceed to the next step, if it does not meet the standard, adjust to S10, and re-reverse excitation of the shunt core separately; S8, the switching control unit 400 collects the branch channel number J i , through the integrated control module to the external industrial computer, through the reverse excitation circuit number J m Compare and analyze. If the standard is met, proceed to the next step. If not, channel number i=i+1, adjust to S6, switch the control unit to connect to the next reverse excitation module J i ; S9, the reverse excitation of the magnetic core is completed, and the system is shut down; S10, when a branch magnetic core needs to be manually reversely excited, the external industrial computer records the branch channel number J; S11, the integrated control module converts and distributes instructions to the program power supply unit and the constant current source unit; S12, the program power supply unit receives the control instruction of the integrated control module, outputs 380V power to the constant current source unit, and outputs a 110V power supply to provide power for all downstream control units; S13, constant current source unit quickly controls voltage and rectifies 380V current, outputting standard set power; S14, the switching control unit turns on the branch to provide power to the reverse excitation module of the branch; S15, the reverse excitation current Icut, voltage Ucut, conduction time Tcut and output port number Ji collected by the switching control unit are fed back to the external industrial computer through the integrated control module, and compared with the set conduction time Tset, voltage Uset and current Iset. If they meet the standards, jump to S9; if not, adjust to S14 and continue to reverse excite the shunt core again.

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