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CN-122001339-A - Full-bridge bipolar pulse generator driven by magnetic isolation

CN122001339ACN 122001339 ACN122001339 ACN 122001339ACN-122001339-A

Abstract

The application provides a full-bridge bipolar pulse generator driven by magnetic isolation, which comprises a synchronous control signal generation module, a magnetic isolation module, a full-bridge Marx circuit module and a load, wherein the synchronous control signal generation module is used for generating a control signal 1 and a control signal 2 which are input into the magnetic isolation module, the magnetic isolation module is used for isolating high-potential suspension of a solid-state switch in the full-bridge Marx circuit module and converting the control signal 1 and the control signal 2 into the control signal of the solid-state switch, and the full-bridge Marx circuit module is used for generating a square wave pulse with adjustable positive polarity and a square wave pulse with adjustable negative polarity according to the control signal of the solid-state switch and inputting the square wave pulse into the load. The application has simple circuit topology structure, reduces the application of power supply, capacitor and switching device, outputs square wave pulse with adjustable polarity, pulse width and pulse interval, adopts modularized design, can switch driving modes and improves output voltage through series superposition.

Inventors

  • FU ZHUANG
  • FU PENGYU

Assignees

  • 上海交通大学

Dates

Publication Date
20260508
Application Date
20260114

Claims (10)

  1. 1. The full-bridge bipolar pulse generator driven by magnetic isolation is characterized by comprising a synchronous control signal generation module, a magnetic isolation module, a full-bridge Marx circuit module and a load; The synchronous control signal generation module is used for generating a control signal 1 and a control signal 2 which are input into the magnetic isolation module, the control signal 1 is used for controlling the on or off of a first part of solid-state switches in the full-bridge Marx circuit module, and the control signal 2 is used for controlling the on or off of a second part of solid-state switches in the full-bridge Marx circuit module; The magnetic isolation module is used for isolating high-potential suspension of the solid-state switch in the full-bridge Marx circuit module and converting the control signal 1 and the control signal 2 into control signals of the solid-state switch; The full-bridge Marx circuit module is used for generating positive-polarity square wave pulses with adjustable pulse width and negative-polarity square wave pulses with adjustable pulse width according to the control signals of the solid-state switches and inputting the square wave pulses into the load.
  2. 2. The magnetically isolated drive full-bridge bipolar pulse generator of claim 1, further comprising a host computer for generating circuit parameters and transmitting the circuit parameters to the synchronous control signal generation module, wherein the synchronous control signal generation module generates the control signal 1 and the control signal 2 according to the circuit parameters.
  3. 3. The full-bridge bipolar pulse generator driven by magnetic isolation according to claim 2, wherein the synchronous control signal generating module comprises a field programmable gate array, a first half-bridge circuit and a second half-bridge circuit, the first half-bridge circuit is used for generating the control signal 1, the second half-bridge circuit is used for generating the control signal 2, the input quantity of the synchronous control signal generating module is a time sequence control signal output by the field programmable gate array, and the control signal 1 and the control signal 2 output by the synchronous control signal generating module are connected into a common primary winding of a magnetic isolation driving coil of the magnetic isolation module.
  4. 4. The magnetically isolated full-bridge bipolar pulse generator of claim 1, wherein the full-bridge Marx circuit module comprises a plurality of cascaded full-bridge Marx circuit units, a power supply Load and method for manufacturing the same Each full-bridge Marx circuit unit comprises a switch tube Switch tube Switch tube Switch tube Diode Diode Capacitance I=1, 2,3,..n, n represents the number of full-bridge Marx circuit units, i represents the i-th full-bridge Marx circuit unit; the power supply The positive electrode of (a) represents the A terminal, the power supply And the negative electrode of (2) represents the B terminal, the power supply Is grounded; the power supply Capacitance between positive electrode of (a) and first full-bridge Marx circuit unit Is connected with the positive electrode of the power supply Is connected with the negative electrode of the capacitor Is connected with the negative electrode of the battery; The switch tube Drain electrode of (d) and the capacitor Is connected with the positive electrode of the switch tube Capacitance between source of (C) and next full-bridge Marx circuit unit Is connected with the negative electrode of the battery; The switch tube Drain electrode of (d) and the capacitor Is connected with the positive electrode of the switch tube Drain electrode of (d) and said diode Is connected with the anode of the diode Cathode of (d) and said capacitor Is connected with the positive electrode of the battery; The switch tube Source of (d) and said capacitor Is connected with the negative electrode of the switch tube Drain electrode of (d) and said diode Cathode connection of the tube, the diode Anode of (c) and said capacitor Is connected with the negative electrode of the battery; The switch tube Source of (d) and said capacitor Is connected with the negative electrode of the switch tube Drain electrode of (d) and the capacitor Is connected with the positive electrode of the battery; The load is provided with Is connected with the power supply Is connected with the negative pole of the load The capacitance of the other end and the last full-bridge Marx circuit unit Is connected to the positive electrode of the battery.
  5. 5. The magnetically-isolated full-bridge bipolar pulse generator of claim 4, wherein the first portion of solid state switches comprises the switching tube in each of the full-bridge Marx circuit cells And the switch tube The second part of the solid state switch comprises the switch tube in each full-bridge Marx circuit unit And the switch tube 。
  6. 6. The magnetically isolated driven full-bridge bipolar pulse generator of claim 5, wherein the magnetic isolation module comprises a magnetic loop Magnetic ring Coil of wire Coil of wire Coil of wire Coil of wire ; The coil And the coil Respectively symmetrically wound on the magnetic rings Is provided with a coil And the coil Is opposite in winding direction, the coil Is denoted as D-terminal, the coil The other end of (2) is denoted as E-terminal, the coil Is denoted as F-terminal, the coil The other end of the (E) is represented as a G end, the D end and the G end are the same-name ends, and the E end and the F end are the same-name ends; the coil And the coil Respectively symmetrically wound on the magnetic rings Is provided with a coil And the coil Is opposite in winding direction, the coil Is denoted as the J-terminal, the coil The other end of (2) is denoted as the K end, the coil Is denoted as H-terminal, the coil The other end of the (C) is expressed as an I end, the H end and the K end are homonymous ends, and the J end and the I end are homonymous ends.
  7. 7. The magnetically isolated driven full-bridge bipolar pulser according to claim 6, wherein in the magnetically isolated module: Switch tube Source of (d) and said coil D end of the switch tube is connected with Gate and resistor of (c) Is connected with one end of the resistor Is connected with the other end of the switch tube Is connected with the source electrode of the transistor; The switch tube Source of (d) and said coil E end connection of the switch tube Gate and resistor of (c) Is connected with one end of the resistor Is connected with the other end of the switch tube Is connected with the drain electrode of the transistor; The switch tube Drain and resistance of (c) Is connected with one end of the resistor And the other end of the diode Is connected with the anode of the battery; The switch tube The drain of (2) is also connected with a resistor Is connected with one end of the resistor And the other end of the diode Is connected with the cathode of the battery; The diode Cathode of (d) and said diode Is connected with the capacitor after the anode of (C) Is connected with one end of the capacitor Is connected with the other end of the switch tube Drain connection of the capacitor One end of (1) is connected with the switch tube through a terminal P1 Is connected with the source electrode of the capacitor Through the terminal P1 and the switch tube Is connected with the grid electrode; Switch tube Source of (d) and said coil F end connection of the switch tube Gate and resistor of (c) Is connected with one end of the resistor The other end of the (B) is connected with the switch tube Is connected with the source electrode of the transistor; The switch tube Source of (d) and said coil G end of the switch tube is connected with Gate and resistor of (c) Is connected with one end of the resistor Is connected with the other end of the switch tube Is connected with the drain electrode of the transistor; The switch tube Drain and resistance of (c) Is connected with one end of the resistor Another end and diode Is connected with the anode of the battery; The switch tube The drain of (2) is also connected with a resistor One end is connected with the resistor And the other end of the diode Is connected with the cathode of the battery; The diode Cathode of (d) and said diode Is connected with the capacitor after the anode of (C) Is connected with one end of the capacitor Is connected with the other end of the switch tube Drain connection of the capacitor One end of (3) is connected with the switch tube through a terminal P3 Is connected with the source electrode of the capacitor Through the terminal P3 and the switch tube Is connected with the grid electrode; Switch tube Source of (d) and said coil Is connected with the H end of the switch tube Gate and resistor of (c) Is connected with one end of the resistor Is connected with the other end of the switch tube Is connected with the source electrode of the transistor; The switch tube Source of (d) and said coil Is connected with the I end of the switch tube Gate and resistor of (c) Is connected with one end of the resistor Is connected with the other end of the switch tube Is connected with the drain electrode of the transistor; The switch tube Drain and resistance of (c) One end of the resistor Another end and diode Is connected with the anode of the battery; The switch tube The drain of (2) is also connected with a resistor Is connected with one end of the resistor And the other end of the diode Is connected with the cathode of the battery; The diode Cathode and diode Anode is connected with capacitor Is connected with one end of the capacitor Is connected with the other end of the switch tube Drain connection of the capacitor One end of (a) is connected with the switch tube through a terminal P4 Is connected with the source electrode of the capacitor The other end is connected with the switch tube through a terminal P4 Is connected with the grid electrode; Switch tube Source of (d) and said coil J-terminal connection of the switch tube Gate and resistor of (c) Is connected with one end of the resistor Is connected with the other end of the switch tube Is connected with the source electrode of the transistor; The switch tube Source of (d) and said coil K end of the switch tube is connected with Gate and resistor of (c) Is connected with one end of the resistor Is connected with the other end of the switch tube Is connected with the drain electrode of the transistor; The switch tube Drain and resistance of (c) Is connected with one end of the resistor Another end and diode Is connected with the anode of the battery; The switch tube The drain of (2) is also connected with a resistor Is connected with one end of the resistor And the other end of the diode Is connected with the cathode of the battery; The diode Cathode of (d) and said diode Is connected with the capacitor after the anode of (C) Is connected with one end of the capacitor Is connected with the other end of the switch tube Drain connection of the capacitor One end of (2) is connected with the switch tube through a terminal P2 Is connected with the source electrode of the capacitor Through the other end of the terminal P2 and the switch tube Is connected to the gate of the transistor.
  8. 8. The magnetically isolated drive full-bridge bipolar pulse generator of claim 7, wherein all of the magnetic rings of the magnetically isolated modules Magnetic rings sharing primary sides and all magnetic isolation modules The magnetic rings of all the magnetic isolation modules are connected with a first half-bridge circuit of the synchronous control signal generation module through wires Magnetic rings sharing primary sides and all magnetic isolation modules The second half-bridge circuit is connected with the synchronous control signal generation module through a wire; the magnetic ring The transferred control signal 1 is used for controlling the switch tube The switch tube Is reversed when the switch tube The voltage between the grid electrode and the source electrode is positive driving voltage, the switch tube In an on state when the switch tube The voltage between the grid electrode and the source electrode is a negative driving voltage, and the switch tube In an off state; the magnetic ring The transferred control signal 2 is used for controlling the switch tube The switch tube Is reversed when the switch tube The voltage between the grid electrode and the source electrode is positive driving voltage, the switch tube In an on state when the switch tube The voltage between the grid electrode and the source electrode is a negative driving voltage, and the switch tube In the off state.
  9. 9. The magnetically isolated full-bridge bipolar pulse generator of claim 8, wherein the operation of the magnetically isolated full-bridge bipolar pulse generator comprises a positive polarity output process, a charging process, and a negative polarity output process.
  10. 10. The magnetically isolated full-bridge bipolar pulse generator of claim 9, wherein the switching tube when the magnetically isolated full-bridge bipolar pulse generator is in positive polarity output And the switch tube In a conducting state, the switch tube And the switch tube In an off state, a current flows through the switching tube The capacitance of each full-bridge Marx circuit unit The load Forming a discharge loop, the diode Blocking the capacitance Through the switching tube The switch tube Is provided; when the full-bridge bipolar pulse generator driven by magnetic isolation is in a charging state, the switching tube And the switch tube In a conducting state, the switch tube And the switch tube In an off state, a current flows through the switching tube The capacitance of each full-bridge Marx circuit unit Switch tube Forming a charging loop, the power supply To the capacitor of each full-bridge Marx circuit unit Charging without passing through the load Is a loop of (2); when the full-bridge bipolar pulse generator driven by magnetic isolation is in a negative polarity output process, the switching tube And the switch tube In a conducting state, the switch tube And the switch tube In an off state, a current flows through the switching tube The capacitance of each full-bridge Marx circuit unit The load is provided with Forming a discharge loop, the diode Blocking the capacitance Through the switching tube And the switch tube And a discharge loop is formed.

Description

Full-bridge bipolar pulse generator driven by magnetic isolation Technical Field The application relates to the technical field of pulse power devices, in particular to a full-bridge bipolar pulse generator driven by magnetic isolation. Background In recent years, pulse generators have been widely used in the fields of medicine, food processing, pollution control, and the like. In particular, in the medical field, pulsed electric field ablation (Pulse Field Ablation, PFA) techniques relying on high voltage pulsed electric fields generated by pulse generators are of great interest. The core mechanism of pulsed electric field ablation techniques is based on electroporation effects. When a high-intensity (1800-2000 v) very short-time (nanosecond to microsecond) electrical pulse is applied to the tissue, the high-voltage electric field instantaneously interferes with the homeostasis of intracellular and extracellular ions, resulting in the formation of nanoscale pores in the membrane lipid bilayer, i.e., electroporation. When the pulse intensity and the pulse quantity reach a certain threshold, irreversible hydrophilic pores are generated on the cell membrane, the permeability of the cell membrane is increased, normal ion gradients inside and outside the cell are destroyed, and the affected cell finally undergoes programmed apoptosis, so that ablation of lesion tissues is realized. As one of the core technologies of pulsed electric field ablation technology, the pulse generator parameter performance directly affects the final therapeutic effect. In order to realize high-voltage output, the problem of high-potential levitation driving of a switch in a circuit needs to be solved. Such driving is classified into active driving and passive driving. The active drive is mostly photoelectric isolation drive, and each switch is required to be provided with an isolation power supply and a photoelectric isolation module to realize isolation. The magnetic isolation drive belongs to passive drive, a magnetic core is utilized to transmit a drive signal, an additional isolation power supply module is not needed, the isolation voltage is high, the output amplitude is greatly improved, the pulse source cost is reduced, the magnetic isolation drive has good synchronism, the control thought can be greatly simplified, and the number of components is saved. The existing bipolar Marx circuit mostly adopts a double Marx type and a full bridge type. The voltage utilization rate of the double Marx topology switch is higher, but the capacitance required by the same voltage is twice that of a unipolar circuit, and the devices are more. The number of capacitors required by the full-bridge topology is the same as that of a unipolar circuit under the same voltage, but the number of switches is large, and the control is complex. In the patent application No. CN112540221a, a pulse voltage generating method, a pulse voltage detecting method and a corresponding device are provided, and although the output of a high-voltage narrow pulse and a low-voltage wide pulse is realized, the isolation driving is realized by adopting an optical fiber, and the number of used components is large. In the patent application number CN120546644a, a solid-state repetition frequency pulse generator driven by multiple synchronous fibers and a control method are provided, and although one path of signal control pulse generation is realized, only unipolar pulse output can be realized. In the patent application number CN116781042A, a bipolar pulse source based on novel magnetic isolation driving is provided, and although the control is simplified based on a magnetic isolation method, a double Marx configuration is adopted, two power supplies are needed, and two energy storage capacitors are needed for each stage. The field lacks a bipolar Marx circuit implementation scheme which does not double the number of capacitors and optimizes the number of switches and a control strategy. Disclosure of Invention Aiming at the defects in the prior art, the application aims to provide a full-bridge bipolar pulse generator driven by magnetic isolation. In a first aspect of the present application, there is provided a magnetically isolated driven full bridge bipolar pulse generator comprising: the system comprises a synchronous control signal generation module, a magnetic isolation module, a full-bridge Marx circuit module and a load; The synchronous control signal generation module is used for generating a control signal 1 and a control signal 2 which are input into the magnetic isolation module, the control signal 1 is used for controlling the on or off of a first part of solid-state switches in the full-bridge Marx circuit module, and the control signal 2 is used for controlling the on or off of a second part of solid-state switches in the full-bridge Marx circuit module; The magnetic isolation module is used for isolating high-potential suspension of the solid-state switch in