CN-121984481-A - Inductive energy storage type pulse power supply with magnetic coupling energy injection mechanism and working method

CN121984481ACN 121984481 ACN121984481 ACN 121984481ACN-121984481-A

Abstract

The invention discloses an inductive energy storage type pulse power supply with a magnetic coupling energy injection mechanism and a working method thereof, which relate to the technical field of pulse power, and introduce a multi-primary-side single-secondary-side mutual inductance coupling energy injection mechanism to enable all levels of inductive current changes in a parallel discharging stage to generate homodromously superposed induced voltage and current on a common secondary-side coil at a load side, wherein the inductive energy is injected into the load side through a magnetic coupling energy injection circuit, so that load end voltage superposition can be realized by secondary-side serial energy injection, injection current superposition can be realized by secondary-side rectification parallel energy injection, and an energy injection window is limited through a load gate device to avoid false energy injection in a charging stage. The invention improves the rising edge, peak current and energy utilization rate of the output pulse and reduces the switching stress and loop oscillation risk on the premise of not increasing the number of stages or not improving the withstand voltage of the main switch, and is suitable for electromagnetic emission, strong pulse magnetic field and pulse power experimental systems.

Inventors

LI PENGYU
CHENG JUNSHENG
WANG QIULIANG
XIONG LING
QI WEI

Assignees

中国科学院电工研究所

Dates

Publication Date: 20260505
Application Date: 20260401

Claims (10)

1. An inductive energy storage type pulse power supply with a magnetically coupled energy injection mechanism, comprising: a direct current power supply; The n-level inductance energy storage units form an XRAM topology, the inductance energy storage units at all levels are in equivalent series connection in a charging stage and in equivalent parallel connection in a discharging stage, and each level of inductance energy storage unit comprises an energy storage inductance, a controllable switch and a unidirectional conduction device and is used for forming a serial and reconstruction structure; the ICCOS conversion branch is arranged at each stage of the inductive energy storage unit and is used for providing reverse conversion current and voltage for the controllable switch in the reconstruction process of switching from serial charging to parallel discharging; The load branch comprises a public secondary side coil, a magnetic coupling energy injection circuit and a gate control device, wherein the public secondary side coil is in mutual inductance coupling with each stage of energy storage inductor and is configured according to the same-direction polarity, so that the inductance current of each stage of parallel discharging stage is changed to generate the same-direction superposed induced voltage on the public secondary side coil; and the control unit is used for controlling the on-off time sequence of the controllable switches and the gate control devices at all levels.
2. The inductive energy storage type pulse power supply with the magnetic coupling energy injection mechanism according to claim 1, wherein the magnetic coupling energy injection circuit comprises a diode rectifier bridge, a port of the common secondary side coil is connected into the diode rectifier bridge, a rectification output end of the diode rectifier bridge is connected in parallel with an output bus or a load end, the rectification output end of the diode rectifier bridge is connected in series with a current limiting inductor, and a buffer capacitor is connected in parallel between the injection node and the output bus or the load end.
3. The inductive energy storage type pulse power supply with magnetic coupling energy injection mechanism as claimed in claim 1, wherein the magnetic coupling energy injection circuit connects the common secondary coil in series with the load loop, and the gate control device performs gate control to enable the induced voltage to be superimposed in series at the load end.
4. An inductive energy storage type pulse power supply with magnetic coupling energy injection mechanism according to any one of claims 1 to 3, characterized in that the magnetic coupling energy injection circuit is a reconfigurable network, and can switch between a secondary side rectifying parallel energy injection mode and a secondary side series energy injection mode or enable the secondary side rectifying parallel energy injection mode and the secondary side series energy injection mode in parallel in the same discharging process.
5. An inductive energy storage type pulse power supply with magnetic coupling energy injection mechanism according to claim 1, wherein the gating device is turned on by the control unit after triggering and completing the commutation by a delay to turn on the energy coupling window and turned off when the load current reaches a threshold value to limit the secondary side reverse current.
6. The inductive energy storage type pulse power supply with magnetic coupling energy injection mechanism as claimed in claim 1, wherein the ICCOS commutation branch comprises a commutation capacitor and a unidirectional conduction device, and the unidirectional conduction device is used for absorbing leakage inductance energy and clamping overvoltage at two ends of the controllable switch.
7. An inductive energy storage pulsed power supply with magnetically coupled energy injection mechanism according to claim 1, wherein the control unit is configured to adjust the energy injection window of the gating device in dependence on the load current rise rate, the output bus voltage and the change in load terminal voltage.
8. A method of operating an inductive energy storage pulsed power supply having a magnetically coupled energy injection mechanism as claimed in any one of claims 1 to 7, comprising the steps of: the n-level inductance energy storage units are connected in series with a direct current power supply in an equivalent way to store energy; triggering ICCOS commutation branches, and applying reverse commutation to corresponding controllable switches to complete serial reconstruction; the n-level energy storage inductors of the n-level inductance energy storage units are equivalently connected in parallel to discharge to an output bus to form current superposition; During parallel discharge, inductive energy which is superposed in the same direction is generated on the common secondary coil by utilizing mutual inductance coupling between each stage of energy storage inductor and the common secondary coil, and the inductive energy is coupled to a load side in a manner of secondary side series energy injection and/or secondary side rectification parallel energy injection through a magnetic coupling energy injection circuit, wherein current multiplication output formed by parallel discharge forms a main energy channel, inductive energy generated by mutual inductance coupling forms a secondary side energy injection channel, and the main energy channel and the secondary side energy injection channel are superposed in the same parallel discharge stage to supply energy to the load side.
9. The method of claim 8, wherein the gating device is kept off or unidirectional isolated during series charging to isolate the secondary side energy injection channel from the load.
10. The method of claim 8, wherein reverse oscillations and voltage spikes caused by commutation conduction are suppressed by the current limiting and snubber legs during secondary commutation parallel charging.

Description

Inductive energy storage type pulse power supply with magnetic coupling energy injection mechanism and working method Technical Field The invention relates to the technical field of pulse power, in particular to an inductance energy storage type pulse power supply with a magnetic coupling energy injection mechanism and a working method. Background The inductance energy storage type pulse power supply is widely applied to the scenes of electromagnetic emission, strong pulse magnetic field, pulse power experiment and the like because of high power density and realization of large current output. The XRAM (dual topology of Markov circuit) inductance energy storage circuit realizes higher output current multiplication capacity on the premise of not remarkably improving the withstand voltage of a single-stage device by series charging and parallel discharging, and meanwhile, the ICCOS (semiconductor reverse commutation) module is combined to improve the switching-on and switching-off process, so that controllable commutation and switching stress reduction are realized. However, the existing XRAM type inductive tank circuit generally only depends on parallel discharge current superposition of the main loop to supply energy to the load, and voltage driving capability and current rising rate di/dt of the load end are limited by output equivalent inductance and loop distribution parameters, wherein i represents current and t represents time, and if the output is increased by increasing the number of stages or increasing the power supply voltage, the stress of a switching device, the system volume and the cost are obviously increased, and stronger overvoltage risks are introduced. In addition, on the premise of not changing the number of stages of the main loop and the withstand voltage of the device, if an additional energy injection channel can be introduced to enable the injection current and the main discharge current to be superposed in the same direction, the effective driving capability can be improved and di/dt can be improved in the key rising edge stage, and meanwhile, the transfer efficiency of the stored energy to the load side can be improved. Therefore, an additional magnetic coupling energy injection channel is introduced outside a main energy channel of a switch reconstruction parallel discharge output on the basis of maintaining the advantages of XRAM serial charge-parallel discharge and ICCOS controllable commutation, so that the current multiplication of a main loop and secondary side induction energy injection can cooperate, and the driving capability and the energy utilization rate of a load side are further improved. Disclosure of Invention In order to solve the technical problems, the invention provides an inductance energy storage type pulse power supply with a magnetic coupling energy injection mechanism and a working method thereof, wherein the inductance energy storage of each stage is output to a load in a current multiplication mode through a parallel discharging main channel realized by XRAM switch reconstruction, meanwhile, inductive energy which is overlapped in the same direction is generated in a parallel discharging stage through mutual inductance coupling auxiliary channels of the inductance energy storage of each stage and a common auxiliary side coil of the load side, and the inductive energy is injected into the load side, so that the dual-channel cooperative energy supply of parallel discharging and magnetic coupling energy injection is realized, and the rising rate of output current, the peak current and the energy utilization rate are improved, and the switching stress is reduced. In order to achieve the above purpose, the invention adopts the following technical scheme: An inductive energy storage type pulsed power supply with a magnetically coupled energy injection mechanism, comprising: a direct current power supply; The n-level inductance energy storage units form an XRAM topology, the inductance energy storage units at all levels are in equivalent series connection in a charging stage and in equivalent parallel connection in a discharging stage, and each level of inductance energy storage unit comprises an energy storage inductance, a controllable switch and a unidirectional conduction device and is used for forming a serial and reconstruction structure; the ICCOS conversion branch is arranged at each stage of the inductive energy storage unit and is used for providing reverse conversion current and voltage for the controllable switch in the reconstruction process of switching from serial charging to parallel discharging; The load branch comprises a public secondary side coil, a magnetic coupling energy injection circuit and a gate control device, wherein the public secondary side coil is in mutual inductance coupling with each stage of energy storage inductor and is configured according to the same-direction polarity, so that the inductance current of each stage of para