CN117937974A - Multi-module superconducting inductance series charging and parallel discharging circuit capable of delaying parallel discharging - Google Patents

Multi-module superconducting inductance series charging and parallel discharging circuit capable of delaying parallel discharging Download PDF

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Publication number
CN117937974A
CN117937974A CN202410067069.XA CN202410067069A CN117937974A CN 117937974 A CN117937974 A CN 117937974A CN 202410067069 A CN202410067069 A CN 202410067069A CN 117937974 A CN117937974 A CN 117937974A
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switch
series
energy storage
parallel
storage inductor
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代天立
李海涛
秦经刚
赵博
高鹏
周超
吴亚楠
卢晶
金环
刘剑
关晓晖
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Shandong University of Technology
Hefei Institutes of Physical Science of CAS
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Shandong University of Technology
Hefei Institutes of Physical Science of CAS
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/0003—Details of control, feedback or regulation circuits
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
    • H02M1/088—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

A multi-module superconducting inductor series charge-parallel discharge circuit capable of delayed parallel discharge, comprising: the device comprises a primary power supply, a power switch, a superconducting energy storage inductor, a serial switch, a parallel discharge diode, a freewheel diode, an anti-backflow diode and a load. During charging, the superconducting energy storage inductor is connected in series with two ends of the primary power supply through the series switch and the power switch; during discharging, the superconducting energy storage inductor is connected in parallel with two ends of a load through a parallel discharging switch and a parallel discharging diode; when the superconducting energy storage inductor is discharged, after the parallel discharging switch is closed, the series switch is turned off simultaneously, so that the superconducting energy storage inductor can synchronously discharge the load in parallel, and the series switch is turned off in sequence in a delayed manner, so that the superconducting energy storage inductor can delay to discharge the load in parallel. The invention can regulate and control the output pulse of the multi-module superconducting inductance energy storage pulse power supply charged in series, thereby meeting the requirements of different loads on pulse waveforms.

Description

Multi-module superconducting inductance series charging and parallel discharging circuit capable of delaying parallel discharging
Technical Field
A multi-module superconducting inductor series charging and parallel discharging circuit capable of delaying parallel discharging belongs to the technical field of pulse power.
Background
Pulse power technology is an emerging discipline that has rapidly developed after the sixties of the last century, and its main research content is how to store energy at low cost and high efficiency, and then to rapidly and effectively transmit high-power, high-amplitude, steep-front pulses to a load through time compression and space compression links. The device has the characteristics of high energy density, strong magnetic field environment and large output pulse, and relates to a primary power supply technology, a switching technology, a pulse compression technology, a pulse forming technology and the like. Because of the diversity of application scenarios of the pulse power technology, requirements on rising time, pulse amplitude, pulse width, stability and the like of output pulses are continuously improved, so that the pulse power technology faces a plurality of new challenges.
The energy storage modes in the pulse power technology mainly comprise capacitive energy storage, inductive energy storage, mechanical energy storage and the like. Compared with capacitive energy storage, the energy density of inductive energy storage is higher by an order of magnitude; compared with mechanical energy storage, the inductive energy storage is used for storing energy in a static magnetic field mode, cooling is easy, only single required energy is needed to be stored, and the advantages enable the inductive energy storage type pulse power supply to have wide development prospect.
However, there are some disadvantages to inductive energy storage, such as the inability of the inductor to store energy for a long period of time, narrow pulse width, etc., due to coil losses. For coil loss, the superconducting inductor has zero resistance, and the problem that the common superconducting inductor cannot store energy and freewheel for a long time is well solved. The multi-module superconducting inductance energy storage series charging and parallel discharging mode mainly uses simple superposition of superconducting energy storage inductance modules to realize the increase of the amplitude of output pulse current. However, for different requirements of loads on output pulse width under actual complex working conditions, the simple parallel multi-module pulse power supply circuit cannot effectively modulate.
The multi-module inductance series charging and parallel discharging circuit is surrounded, the advantages of the multi-module inductance series charging and parallel discharging circuit are fully exerted, and several research methods are proposed in the current literature:
The ICCOS commutated XRAM topology proposed in document Dedie P,Brommer V,Scharnholz S.Experimental realization of an eight-stage XRAM generator based on ICCOS semiconductor opening switches,fed by a magnetodynamic sorage system[J].IEEE Transactions on Magnetics,2009,45(1):266-271.. Based on an XRAM circuit mode, the circuit introduces a thyristor countercurrent turn-off technology, can turn off larger current and withstand larger voltage, but only can synchronously discharge an energy storage inductor during discharge, and the discharge waveform is not adjustable.
A superconducting energy storage pulse power supply disclosed in patent application number 201010225070.9 adopts a primary power supply to realize amplification output current pulse by firstly charging a superconducting inductor in series and then discharging the superconducting inductor in parallel, the electric energy in the mode can only be charged and discharged immediately, no follow current can be generated to wait for a discharging instruction, in addition, the mode can only realize synchronous discharging, realize output of large current pulse and cannot modulate pulse width.
Disclosure of Invention
The invention aims to solve the technical problems that: the circuit of the existing pulse power supply is improved, a multi-module superconducting inductor series charging and parallel discharging circuit capable of delaying parallel discharging is provided, and modulation of the amplitude and width of output pulses is achieved. When the number of the unit modules is 5 during series charging, the power switch K s is turned on, the series switch K s1～Ks5 is turned on, and the primary power Us, the power switch K s, the series switch K s1～Ks5 and five groups of single-module pulse power sources are connected in series to form a charging loop; when synchronous parallel discharging is performed, the parallel discharging switch K p1～Kp5 is turned on, the power switch K s and the series switch K s1～Ks5 are turned off, and superconducting energy storage inductors in each group of modules are sequentially connected in series through the parallel discharging switch, the anti-backflow diode and the parallel discharging diode to form a discharging loop; when the delay parallel discharge is carried out, the parallel discharge switch K p1～Kp5 is turned on, the power switch Ks is turned off, the series switch K s1～Ks5 of each module is sequentially delayed to be turned off, and the superconducting energy storage inductor in each module is sequentially delayed to be sequentially connected with a load in series through the parallel discharge switch, the anti-backflow diode and the parallel discharge diode to form a discharge loop. In the discharging process, superconducting energy storage inductors in the modules which are not turned off by the series switch are connected in series, and a freewheel loop is formed through a freewheel diode. The discharge mode can modulate the amplitude and width of the output pulse, and meets the requirements of different loads on different pulse waveforms.
The invention provides a multi-module superconducting inductance series charging and parallel discharging circuit capable of delaying parallel discharging, which comprises a primary charging power supply Us, a power switch Ks, a load and a plurality of groups of superconducting energy storage inductance unit modules M 1-Mn which are sequentially connected in series, wherein the unit modules M 1-Mn respectively comprise a superconducting energy storage inductance L 1～Ln, a serial switch K s1～Ksn, a parallel discharging switch K p1～Kpn, a parallel discharging diode, a freewheeling diode D x1～Dxn and an anti-backflow diode; the power switch, the series switch and the parallel discharging switch are formed by reversely connecting an IGBT in parallel with a diode; the positive electrode and the negative electrode of the primary charging power supply Us are sequentially connected with n groups of unit modules in series to form a loop, and the n groups of unit modules are connected in parallel to two sides of a load; the collector of the power switch Ks is connected with the positive electrode of the power supply Us, and the emitter is connected with the superconducting energy storage inductor of the module M n.
Further, an anode of the freewheel diode D x1～Dxn is connected with a cathode of the power supply Us, and a cathode of the freewheel diode D x1～Dxn is sequentially connected with the superconducting energy storage inductor L 1～Ln; the superconducting energy storage inductor L 1～Ln and the series switch K s1～Ksn are sequentially connected in series on two sides of the power supply; in each unit module, a superconducting energy storage inductor, a parallel discharge switch, an anti-backflow diode and a parallel discharge diode are sequentially connected in series to form a discharge loop.
Further, the number of modules charged in parallel is adjusted by controlling the on-off of the series switch K s1～Ksn, and the width of the output pulse is modulated.
Further, when the number of the unit modules is 5, the synchronous parallel discharging mode working process of the circuit is as follows:
A, triggering and conducting a power switch K s and a series switch K s1～Ks5 to charge a primary power Us to the superconducting energy storage inductor L 1～L5, wherein the positive electrode of the primary power U s sequentially passes through the power switch K s -superconducting energy storage inductor L 1 -series switch K s1 -superconducting energy storage inductor L 2 -series switch K s2 -superconducting energy storage inductor L 3 -series switch K s3 -superconducting energy storage inductor L 4 -series switch K s4 -superconducting energy storage inductor L 5 -series switch K s5 and the negative electrode of the primary charging power Us to form a charging loop;
Stage b, turning off the power switch K s, turning on the parallel discharge switch K p1～Kp5, and simultaneously turning off the series switch K s1～Ks5, wherein the superconducting energy storage inductor, the parallel discharge switch, the load and the parallel discharge diode in each module are sequentially connected in series to form a discharge loop;
the group delay parallel discharging mode works as follows, the modules M1 and M2 are a group, and the other modules are a group respectively:
A, triggering and conducting a power switch K s and a series switch K s1～Ks5 to charge a primary power Us to the superconducting energy storage inductor L 1～L5, wherein the positive electrode of the primary power U s sequentially passes through the power switch K s -superconducting energy storage inductor L 1 -series switch K s1 -superconducting energy storage inductor L 2 -series switch K s2 -superconducting energy storage inductor L 3 -series switch K s3 -superconducting energy storage inductor L 4 -series switch K s4 -superconducting energy storage inductor L 5 -series switch K s5 and the negative electrode of the primary charging power Us to form a charging loop;
stage b, turning off the power switch K s, turning on the parallel discharge switch K p1～Kp5, turning off the serial switch K s1～Ks2, connecting the modules M1 and M2 in parallel at two sides of the load for discharging, and sequentially connecting the superconducting energy storage inductor, the parallel discharge switch, the load and the parallel discharge diode in series to form a discharge loop; the series switch K s3～Ks5 is kept on, the superconducting energy storage inductor L 3 -series switch K s3 -superconducting energy storage inductor L 4 -series switch K s4 -superconducting energy storage inductor L 5 -series switch K s5 -freewheel diode D x3 are sequentially connected in series to form a freewheel loop, and after delay is 2ms, the phase c is entered;
A stage c, controlling to turn off a series switch K s3, connecting modules M1, M2 and M3 in parallel at two sides of a load to discharge the load, keeping the series switch K s4～Ks5 on, sequentially connecting a superconducting energy storage inductor L 4 -series switch K s4 -superconducting energy storage inductor L 5 -series switch K s5 -freewheel diode D x3 in series to form a freewheel loop, and entering a stage D after delaying for 2 ms;
A stage D, controlling to turn off a series switch K s4, enabling modules M1, M2, M3 and M4 to be connected in parallel at two sides of a load to discharge the load, keeping the series switch K s5 on, sequentially connecting a superconducting energy storage inductor L 5, the series switch K s5 and a freewheel diode D x3 in series to form a freewheel loop, and entering a stage e after delaying for 1.5 ms;
And e, controlling to turn off the series switch K s5, and discharging the load by connecting the modules M1, M2, M3, M4 and M5 in parallel at two sides of the load.
The multi-module superconducting inductor series charging and parallel discharging circuit capable of delaying parallel discharging provided by the invention realizes series charging and parallel discharging by controlling the on-off of a power switch K s, a series switch K s1～Ksn and a parallel discharging switch K p1～Kpn, and can realize the adjustment of the peak value and the pulse width of an output pulse.
Drawings
Fig. 1 is a schematic diagram of a pulse power supply circuit according to the present invention.
Fig. 2 is a schematic diagram of a charging phase of the pulse power circuit according to the present invention.
FIG. 3 is a schematic diagram of a synchronous parallel discharge phase of the pulse power circuit of the present invention.
FIG. 4 is a schematic diagram of the synchronous parallel discharge output load current of the pulse power circuit of the present invention.
Fig. 5 is a schematic diagram of a parallel discharge phase of two modules of the pulse power circuit of the present invention.
Fig. 6 is a schematic diagram of a three-module parallel discharge phase of the pulse power circuit of the present invention.
Fig. 7 is a schematic diagram of a parallel discharge phase of four modules of the pulse power circuit of the present invention.
Fig. 8 is a schematic diagram of a five-module parallel discharge phase of the pulse power circuit of the present invention.
FIG. 9 is a schematic diagram of a three-module delayed parallel discharge output load current of the pulse power circuit of the present invention;
Detailed Description
In order to make the objects, technical solutions and technical effects of the present invention more apparent, the present invention will be further described with reference to fig. 1. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Referring to fig. 1, the invention provides a multi-module superconducting inductor series charging and parallel discharging circuit capable of delaying parallel discharging, which comprises a primary power Us, a power switch Ks, a load and a plurality of groups of superconducting energy storage inductor unit modules which are sequentially connected in series, wherein the number of the superconducting energy storage inductor unit modules is preferably 5. The following is selected as 5 based on the unit modules.
The power switch Ks, the series switch K s1～Ks5 and the parallel discharging switch K p1～Kp5 are formed by reversely connecting an IGBT in parallel with a diode; the positive electrode and the negative electrode of the primary power supply Us are sequentially connected in series with five groups of superconducting energy storage inductance modules to form a loop, and the five groups of modules are connected in parallel to two sides of a load; and the collector of the IGBT in the power switch Ks is connected with the positive electrode of the power supply, and the emitter of the IGBT is connected with the superconducting energy storage inductor.
The superconducting energy storage inductance module consists of a superconducting energy storage inductance L 1～L5, a series switch K s1～Ks5, a parallel discharge switch K p1～Kp5, a parallel discharge diode D 1～D5, a freewheel diode D x1～Dx5 and an anti-backflow diode D f1～Df5; the anode of the freewheel diode D x1～Dx5 is connected with the cathode of the power supply Us, and the cathode is sequentially connected with the superconducting energy storage inductor L 1～L5; the superconducting energy storage inductor L 1～L5 and the series switch K s1～Ks5 are sequentially connected in series on two sides of the power supply; in each group of modules, the superconducting energy storage inductor, the parallel discharge switch, the anti-backflow diode and the parallel discharge diode are sequentially connected in series to form a discharge loop.
The working process of the multi-module superconducting inductance series charging and parallel discharging circuit capable of delaying parallel discharging provided by the invention is described in detail below with reference to figure 1, and the working process can be divided into a synchronous parallel discharging mode and a delayed parallel discharging mode due to different discharging modes:
The working process of the synchronous parallel discharge mode comprises the following steps:
In the stage a, as shown in fig. 2, the power switch K s and the series switch K s1～Ks5 are triggered to be turned on, so that the primary power Us charges the superconducting energy storage inductor L 1～L5, and the positive electrode of the primary power U s sequentially passes through the power switch K s -the superconducting energy storage inductor L 1 -the series switch K s1 -the superconducting energy storage inductor L 2 -the series switch K s2 -the superconducting energy storage inductor L 3 -the series switch K s3 -the superconducting energy storage inductor L 4 -the series switch K s4 -the superconducting energy storage inductor L 5 -the series switch K s5 and the negative electrode of the primary charging power Us to form a charging loop;
Stage b, as shown in fig. 3, the power switch K s is turned off, the parallel discharge switch K p1～Kp5 is turned on, the series switch K s1～Ks5 is turned off, the superconducting energy storage inductor, the parallel discharge switch, the load and the parallel discharge diode in each module are sequentially connected in series to form a discharge loop, and the discharge waveform is shown in fig. 4;
The working process of the delayed parallel discharge mode (taking group delayed parallel discharge as an example, the modules M1 and M2 are in one group, and the rest modules are in one group respectively):
In the stage a, as shown in fig. 2, the power switch K s and the series switch K s1～Ks5 are triggered to be turned on, so that the primary power Us charges the superconducting energy storage inductor L 1～L5, and the positive electrode of the primary power U s sequentially passes through the power switch K s -the superconducting energy storage inductor L 1 -the series switch K s1 -the superconducting energy storage inductor L 2 -the series switch K s2 -the superconducting energy storage inductor L 3 -the series switch K s3 -the superconducting energy storage inductor L 4 -the series switch K s4 -the superconducting energy storage inductor L 5 -the series switch K s5 and the negative electrode of the primary charging power Us to form a charging loop;
Stage b, as shown in fig. 5, the power switch K s is turned off, the parallel discharge switch K p1～Kp5 is turned on, the series switch K s1～Ks2 is turned off, the modules M1 and M2 are connected in parallel to discharge at two sides of the load, and the superconducting energy storage inductor-parallel discharge switch-load-parallel discharge diode in the module are sequentially connected in series to form a discharge loop; the series switch K s3～Ks5 is kept on, the superconducting energy storage inductor L 3 -series switch K s3 -superconducting energy storage inductor L 4 -series switch K s4 -superconducting energy storage inductor L 5 -series switch K s5 -freewheel diode D x3 are sequentially connected in series to form a freewheel loop, and after delay is 2ms, the phase c is entered;
In the stage c, as shown in fig. 6, the series switch K s3 is controlled to be turned off, the modules M1, M2 and M3 are connected in parallel at two sides of the load to discharge the load, the series switch K s4～Ks5 is kept on, the superconducting energy storage inductor L 4 -series switch K s4 -superconducting energy storage inductor L 5 -series switch K s5 -freewheel diode D x3 are sequentially connected in series to form a freewheel loop, and after 2ms of delay, the stage D is entered;
In the stage D, as shown in fig. 7, the series switch K s4 is controlled to be turned off, the modules M1, M2, M3 and M4 are connected in parallel to discharge the load at two sides of the load, the series switch K s5 is kept on, the superconducting energy storage inductor L 5 -series switch K s5 -freewheel diode D x3 are sequentially connected in series to form a freewheel loop, and after delay is 1.5ms, the stage e is entered;
Stage e, as shown in fig. 8, the control turns off the series switch K s5, and the modules M1, M2, M3, M4, M5 are connected in parallel across the load to discharge the load.
The discharge waveform of the delayed parallel discharge mode is shown in fig. 9.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the invention in any way, and any person skilled in the art may make modifications or alterations to the disclosed technical content to the equivalent embodiments. However, any simple modification, equivalent variation and variation of the above embodiments according to the technical substance of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims (4)

1. A multi-module superconducting inductance series charging and parallel discharging circuit capable of delaying parallel discharging is characterized in that: the device comprises a primary charging power Us, a power switch Ks, a load and a plurality of groups of superconducting energy storage inductance unit modules M 1-Mn which are sequentially connected in series, wherein each unit module M 1-Mn comprises a superconducting energy storage inductance L 1～Ln, a serial switch K s1～Ksn, a parallel discharging switch K p1～Kpn, a parallel discharging diode D 1～Dn, a freewheeling diode D x1～Dxn and an anti-backflow diode D f1～Dfn; the power switch, the series switch and the parallel discharging switch are formed by reversely connecting a diode in parallel with an IGBT; the positive electrode and the negative electrode of the primary charging power supply Us are sequentially connected with n groups of unit modules in series to form a loop, and the n groups of unit modules are connected in parallel to two sides of a load; the collector of the power switch Ks is connected with the positive electrode of the power supply Us, and the emitter is connected with the superconducting energy storage inductor of the module M n.
2. The multi-module superconducting inductor series charging and parallel discharging circuit capable of delaying parallel discharging according to claim 1, wherein an anode of the freewheel diode D x1～Dxn is connected with a cathode of a power supply Us, and a cathode of the freewheel diode D x1～Dxn is sequentially connected with the superconducting energy storage inductor L 1～Ln; the superconducting energy storage inductor L 1～Ln and the series switch K s1～Ksn are sequentially connected in series on two sides of the power supply; in each unit module, a superconducting energy storage inductor, a parallel discharge switch, an anti-backflow diode and a parallel discharge diode are sequentially connected in series to form a discharge loop.
3. The multi-module superconducting inductor series charging and parallel discharging circuit capable of delaying parallel discharging according to claim 1, wherein the number of modules charged in parallel is regulated by controlling the on-off of a series switch K s1～Ksn, and the width of output pulse is modulated.
4. A multi-module superconducting inductor series charge and parallel discharge circuit capable of delayed parallel discharge according to claim 3, wherein when the number of unit modules is 5, the synchronous parallel discharge mode operation process of the circuit is as follows:
A, triggering and conducting a power switch K s and a series switch K s1～Ks5 to charge a primary power Us to the superconducting energy storage inductor L 1～L5, wherein the positive electrode of the primary power U s sequentially passes through the power switch K s -superconducting energy storage inductor L 1 -series switch K s1 -superconducting energy storage inductor L 2 -series switch K s2 -superconducting energy storage inductor L 3 -series switch K s3 -superconducting energy storage inductor L 4 -series switch K s4 -superconducting energy storage inductor L 5 -series switch K s5 and the negative electrode of the primary charging power Us to form a charging loop;
Stage b, turning off the power switch K s, turning on the parallel discharge switch K p1～Kp5, and simultaneously turning off the series switch K s1～Ks5, wherein the superconducting energy storage inductor, the parallel discharge switch, the load and the parallel discharge diode in each module are sequentially connected in series to form a discharge loop;
the group delay parallel discharging mode works as follows, the modules M1 and M2 are a group, and the other modules are a group respectively:
A, triggering and conducting a power switch K s and a series switch K s1～Ks5 to charge a primary power Us to the superconducting energy storage inductor L 1～L5, wherein the positive electrode of the primary power U s sequentially passes through the power switch K s -superconducting energy storage inductor L 1 -series switch K s1 -superconducting energy storage inductor L 2 -series switch K s2 -superconducting energy storage inductor L 3 -series switch K s3 -superconducting energy storage inductor L 4 -series switch K s4 -superconducting energy storage inductor L 5 -series switch K s5 and the negative electrode of the primary charging power Us to form a charging loop;
stage b, turning off the power switch K s, turning on the parallel discharge switch K p1～Kp5, turning off the serial switch K s1～Ks2, connecting the modules M1 and M2 in parallel at two sides of the load for discharging, and sequentially connecting the superconducting energy storage inductor, the parallel discharge switch, the load and the parallel discharge diode in series to form a discharge loop; the series switch K s3～Ks5 is kept on, the superconducting energy storage inductor L 3 -series switch K s3 -superconducting energy storage inductor L 4 -series switch K s4 -superconducting energy storage inductor L 5 -series switch K s5 -freewheel diode D x3 are sequentially connected in series to form a freewheel loop, and after delay is 2ms, the phase c is entered;
A stage c, controlling to turn off a series switch K s3, connecting modules M1, M2 and M3 in parallel at two sides of a load to discharge the load, keeping the series switch K s4～Ks5 on, sequentially connecting a superconducting energy storage inductor L 4 -series switch K s4 -superconducting energy storage inductor L 5 -series switch K s5 -freewheel diode D x3 in series to form a freewheel loop, and entering a stage D after delaying for 2 ms;
A stage D, controlling to turn off a series switch K s4, enabling modules M1, M2, M3 and M4 to be connected in parallel at two sides of a load to discharge the load, keeping the series switch K s5 on, sequentially connecting a superconducting energy storage inductor L 5, the series switch K s5 and a freewheel diode D x3 in series to form a freewheel loop, and entering a stage e after delaying for 1.5 ms;
And e, controlling to turn off the series switch K s5, and discharging the load by connecting the modules M1, M2, M3, M4 and M5 in parallel at two sides of the load.
CN202410067069.XA 2024-01-17 2024-01-17 Multi-module superconducting inductance series charging and parallel discharging circuit capable of delaying parallel discharging Pending CN117937974A (en)

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