A high-voltage pulsed electric field generator system and modular drawer power switch network

Abstract

The application provides a high-voltage pulse electric field generator system and a modular drawer-type power switch network, the input end comprises at least one module, the output end comprises at least one module, a plurality of modules are included in each of the input end module, the input ends of all the modules are connected in parallel to the same low-voltage direct-current source, and the module of the output end is flexibly configured in parallel connection, series connection or any combination form according to the actual load impedance characteristics. By changing the number of modules and the combination of matching connection modes, the system can simultaneously work in the mode of high-voltage output, large-current output or balance of both, thereby actively adapting to the impedance change caused by different liquid types, flow rates and components, fundamentally solving the problem of pulse waveform distortion caused by load mismatch, reducing the necessary redundancy design, improving power conversion efficiency, reducing cost, and meeting the pulse electric field sterilization needs of various types of liquid food without changing the hardware configuration of the production line.

Description

Technical Field

[0001] This invention relates to a high-voltage pulse electric field generator, and more particularly to a high-voltage pulse electric field generator system and a modular drawer-type power switch network. Background Technology

[0002] In the field of liquid food processing, high-voltage pulsed electric field sterilization technology exhibits significant advantages due to its high efficiency under low-temperature conditions. However, the core bottleneck for the industrial application of this technology lies in the performance of its high-voltage pulsed power supply. Existing pulsed electric field generators mostly employ fixed topologies, which, when dealing with liquid food materials with complex compositions and varying conductivity, especially under dynamic flow conditions, generally suffer from a mismatch between the system output characteristics and the time-varying load impedance. Specifically, traditional power supply architectures lack flexible adjustment mechanisms for parameters such as output voltage, current, and power, making it difficult to adapt to the specific requirements of different liquid food media and their flow states for electric field strength. This insufficient adaptation directly leads to unstable system sterilization efficiency, reduced energy utilization efficiency, and deterioration of the output pulse waveform quality, specifically manifested as pulse edge hysteresis, voltage drop at the top, and waveform overshoot. These problems further affect the uniformity and consistency of sterilization, and may also adversely impact the sensory characteristics and nutritional components of the product due to enhanced Ohmic thermal effects.

[0003] Currently, high-voltage pulse generator implementations are mainly based on linear transformer-driven circuits and their derivative structures. Traditional single-module LTDs use multiple primary energy storage units connected in parallel for discharge, achieving voltage conversion through a pulse transformer. However, their output voltage amplitude is limited by the transformer turns ratio, making it difficult to meet the requirements of high field strength applications. To improve output capability, existing technologies often employ multi-module combined architectures, mainly including the following two typical schemes:

[0004] The series-connected architecture at the output end achieves arithmetic superposition of output voltages by connecting the secondary windings of multiple LTD modules in series. While this scheme can effectively improve the field strength, the equivalent leakage inductance of the system increases linearly with the number of series modules, resulting in significant hysteresis at the pulse waveform edges. Furthermore, the reduction in distributed capacitance exacerbates waveform overshoot. More importantly, the output current of this structure is limited by the capacity of a single module, making it difficult to meet the high current requirements of low-impedance loads.

[0005] The parallel output architecture directly connects the outputs of multiple modules in parallel, increasing the load-carrying capacity through current superposition. While this structure improves pulse edge characteristics, the output voltage remains limited to the level of a single module, failing to enhance the field strength. Furthermore, the circulating current between parallel modules leads to energy loss, and the increased equivalent distributed capacitance of the system causes voltage drops during the pulse peak phase, affecting the consistency of sterilization performance.

[0006] Both of these traditional architectures employ fixed output connections, lacking the ability to dynamically adjust output parameters based on load characteristics. When processing liquid foods with significantly different impedance characteristics, the system cannot achieve optimal matching between output voltage and current, resulting in reduced energy transfer efficiency, unstable sterilization effects, and output waveform quality easily affected by load variations. These limitations severely restrict the widespread application of high-voltage pulsed electric field technology in industrial continuous processing. Summary of the Invention

[0007] 1. The technical problem to be solved:

[0008] Existing all-solid-state LTD pulse generators cannot dynamically adapt to a wide range of varying load impedances due to their fixed output topology.

[0009] 2. Technical Solution:

[0010] To address the above problems, this invention provides a high-voltage pulsed electric field generator system. The input end includes at least one module, and the output end includes at least one module. Each input module contains multiple modules. The input ends of all modules are connected in parallel to the same low-voltage DC source. The output modules can be flexibly configured in parallel, series, or any combination thereof according to the actual load impedance characteristics. The control section uses PWM technology for regulation. The number of modules is the same as the number of PWM signals, which are converted into N synchronization signals through an optical fiber isolation circuit to ensure synchronous operation of all modules.

[0011] The connection method and number of modules for the output ports are determined by the user based on actual application requirements, such as different processing chamber structures, types of liquid food, food flow rates, processing temperatures, and required field strength parameters, to match the appropriate number of power modules and the cascading structure.

[0012] The outputs of all modules in a single input module are connected in parallel. In this configuration, the system output voltage remains the same as the output voltage of a single module, while the total output current is the sum of the currents of all modules, i.e., I0. total = ∑I i .

[0013] With all modules connected in series at their outputs, the system output current remains constant, while the total output voltage is the sum of the voltages of each module, i.e., U. total = ∑U i .

[0014] This invention also provides a high-voltage pulse electric field modular drawer-type power switch network, including multiple drawers, each containing one of the aforementioned modules. Each module has two output terminals: a high-voltage terminal and a low-voltage terminal. These terminals are connected to different busbars or directly interconnected via controllable switches. The switch network includes a total positive output bus and a total negative output bus, which are connected to the load. The switch network is equipped with a preset interface and an impedance matching function unit for receiving real-time monitored liquid parameters (Z, F) and a customer-preset target (Z). x , F x ), dynamically calculates the optimal sterilization parameters (E) through a built-in algorithm. x , I pulse_x ) and the corresponding power matching parameters (N) x M x It also includes a preset interface and impedance matching function unit for receiving real-time monitored liquid parameters (Z, F) and customer preset targets (Z). x , F x ), dynamically calculates the optimal sterilization parameters (E) through a built-in algorithm. x , I pulse_x ) and the corresponding power matching parameters (N) x M x (P / S).

[0015] The built-in algorithm specifically works as follows: based on the flow velocity parameter F of the liquid food in the production line and the impedance parameter Z of the target liquid (i.e., the type of liquid food), and according to the customer's preset liquid impedance and flow velocity (Z... x F x ), calculate the pulse electric field intensity value E that achieves sterilization. x and pulse power current value I pulse_x According to (E) x I pulse_x The value N matches the number of modules N connected in parallel within the group of the MIP-MOM pulse electric field generator. x Number of modules M x And the module external matching method (P / S), i.e., power matching parameters (N x M x (P / S), the system automatically matches the system module according to the matching instruction and outputs the optimal sterilization pulse electric field parameters.

[0016] For the parallel connection mode of the output modules: close the switch between the positive terminals of all modules and the total positive output bus, i.e., P of each module _i Connect to P _out Close the switches between the negative terminals of all modules and the total negative output bus, and the N_ of each module i Connect to N _out At this point, all modules are connected in parallel.

[0017] For the output module series mode: close the switch between the positive terminal of the i-th module and the total positive output bus, P1 is connected to P... _out Close the switch between the negative terminal of module M and the total negative output bus, N_M connected to N _out For i from 1 to M-1, close the switch between the negative terminal of the i-th module and the positive terminal of the (i+1)-th module, N _i P {i+1} At this point, all modules are connected in series.

[0018] For the output module hybrid mode, taking the parallel connection of two modules and then the series connection of a third module as an example: Assume that the first and second modules are connected in parallel, and then connected in series with the third module; the specific steps are as follows: Connect the first and second modules in parallel: close the switches P1 and P2 to a sub-positive bus, and close the switches N1 and N2 to a sub-negative bus; connect the sub-positive bus to the total positive output bus or as the starting point of the series chain; connect the sub-negative bus to the positive terminal of the third module, that is, connect the connection point of N1 and N2 to P3; connect the negative terminal of the third module to the total negative output bus.

[0019] 3. Beneficial effects:

[0020] This invention solves the fundamental problem of mismatch between power supply structure and load characteristics in high-voltage pulse electric field sterilization systems. It focuses on overcoming the problems of unstable sterilization performance, low energy efficiency, and insufficient food quality assurance caused by the inability of existing generators to dynamically adapt to varying load impedances due to their fixed output modes. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the MIP-MOM system architecture.

[0022] Figure 2 This is a schematic diagram of a single-module multi-turn ratio LTD circuit structure.

[0023] Figure 3 It is a block diagram of the parallel structure within the group.

[0024] Figure 4 This is a block diagram of the external series structure.

[0025] Figure 5 This is a block diagram of the external series structure of the MIP-MOM group.

[0026] Figure 6 This is a schematic diagram of a modular drawer-type power switch network.

[0027] Figure 7 This is the functional flowchart of the load matching control logic.

[0028] Figure 8This is a schematic diagram of the sterilization process.

[0029] Figure 9 This is a schematic diagram showing the dynamic sterilization results at different treatment times.

[0030] Figure 10 This is a schematic diagram showing the dynamic sterilization results at different treatment times. Detailed Implementation

[0031] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0032] like Figure 1 As shown, this invention provides a high-voltage pulse electric field generator system, which is a module input parallel-module output matching (MIP-MOM) high-voltage pulse electric field generator system architecture. Multiple module input terminals are connected in parallel. This invention adopts an intra-group parallel structure, so even if a single module fails, the remaining parallel modules can continue to work, resulting only in a moderate decrease in the system output capability rather than complete failure, which significantly improves the continuous operation reliability of the sterilization production line.

[0033] The output terminals of this invention can be arbitrarily combined and connected. The number of MIP-MOM modules is N (N>1), and the input ports of each module are connected in parallel, with the same DC voltage amplitude U input. dc DC voltage U dc Adjustable, the power level can be adjusted according to the user's actual pulse requirements. The connection method and number of modules for the output ports are determined by the user based on actual application requirements, such as different processing chamber structures, types of liquid food, food flow rates, processing temperatures, and required field strength, matching the appropriate number of power modules and cascading structures. The control part of this topology uses PWM technology for regulation. In the MIP-MOM system, N modules require N PWM signals, which are input through external PWM technology and converted into N synchronization signals through fiber optic isolation circuits to ensure that all modules work synchronously, achieving pulse voltage superposition and improving power output. Its output terminals can be arbitrarily connected to match the load, including parallel connection, series connection, and any combination of parallel and series connections.

[0034] This invention achieves an optimal balance between paralleling modules to reduce equivalent inductance (improving pulse edge) and series connecting modules to reduce equivalent capacitance (reducing pulse drop), based on the target output. This design effectively alleviates common quality issues in pulse waveforms, such as edge hysteresis, pulse drop, and overshoot, inherent in traditional single-architecture designs.

[0035] In one embodiment, processing fruit juice (high resistance) → switching to multi-module series mode (high voltage); processing concentrated soup (low resistance) → switching to multi-module parallel mode (high current); processing intermediate characteristic materials → using a mixing mode (balance).

[0036] Addressing the variable load impedance characteristics in liquid food sterilization applications, this invention breaks through the limitations of traditional generators with fixed output modes. Based on the load variation characteristics and the modular combination of power units, a novel system architecture is proposed, featuring parallel connection of internal modules and external matching. By changing the number N of parallel modules within the module, the output power and current capability can be adjusted. By changing the combination of the number M of modules and the matching connection method, the system can simultaneously operate in high-voltage output, high-current output, or a balance between the two modes, thereby actively adapting to impedance changes caused by different liquid types, flow rates, and compositions. This fundamentally solves the problem of pulse waveform distortion caused by load mismatch.

[0037] In this invention, the module is a single-module multi-turn ratio LTD, which is the basic power unit of the system. It includes an energy storage capacitor, a switching transistor, a multi-turn ratio pulse transformer, etc., and is responsible for generating high-voltage pulses. The circuit structure is as follows: Figure 2 As shown in the figure. An adjustable DC source is used to provide energy U to the entire system. dc That is, all the energy storage capacitors C1~C n All modules are powered by the same DC source, ensuring consistency across all modules and providing the necessary stability for subsequent transient pulse power. R1~R n The charging resistor for the energy storage capacitor prevents U dc Excessive surge current during charging shortens the lifespan of the energy storage capacitor and affects system stability. Diodes D1~D n The main function is to utilize the unidirectional conduction characteristic of diodes to protect the adjustable DC source, preventing energy from flowing back into the DC source and causing power supply damage. Switching transistors Q1~Q n Controlling the charging and discharging of the energy storage capacitor, when the switching transistor is in the off state, the DC source U dc All energy storage capacitors are charged, and when the switching transistor is turned on, all energy storage capacitors discharge together, and the energy is superimposed onto the liquid load through the transformer. The transformer is optimized from the 1:1 structure of the traditional LTD to a multi-turn ratio transformer. The energy released by multiple parallel energy storage capacitors is applied together to the primary side of the transformer, and then stepped up by the transformer and applied to the load terminals. Compared with the traditional LTD, higher voltage can be achieved in a smaller size and weight.

[0038] This invention uses a standardized multi-turn ratio LTD module as the basic unit of the system. By increasing or decreasing the number of modules and adjusting their output connection methods, the system's output power level can be linearly expanded while maintaining the consistency of the internal structure of each module. This standardized design greatly simplifies the system's design, manufacturing, and maintenance processes, providing a unified hardware platform for sterilization applications of different scales.

[0039] like Figure 3 As shown, the parallel structure within the group connects the output terminals of all modules in parallel. In this configuration, the system output voltage remains the same as the output voltage of a single module, while the total output current is the sum of the currents of all modules, i.e., I0. total = ∑I i This mode is suitable for low-impedance, high-current load scenarios. Its advantage lies in reducing the current-carrying pressure on a single switch by sharing the current, thereby improving system reliability.

[0040] External series structure such as Figure 4 As shown, it connects the output terminals of all modules in series. In this mode, the system output current remains constant, while the total output voltage is the sum of the voltages of each module, i.e., U. total = ∑U i This structure is particularly suitable for high-voltage pulse requirements of high-impedance loads, but its pulse edge speed is significantly affected by the cumulative effect of leakage inductance.

[0041] To achieve a balance between high voltage and high current output, the MIP-MOM composite architecture of this invention, such as... Figure 5 As shown in the diagram, this architecture first connects some modules in parallel to form a group, and then connects multiple parallel modules in series to form a "parallel-then-series" topology. This design combines the advantages of voltage superposition and current sharing, and its output voltage and current can be expressed as follows: and Where b is the number of series groups and f is the total number of switches. By flexibly adjusting the series-parallel ratio, the system can adaptively match loads with different impedance characteristics, maximizing energy transfer efficiency while ensuring waveform quality.

[0042] This invention also provides a high-voltage pulse electric field modular drawer-type power switch network, such as... Figure 6 As shown, the system includes multiple drawers 1, each containing a module. Each module in each group has two output terminals: a high-voltage terminal and a low-voltage terminal. These terminals are connected to different busbars or directly interconnected via controllable switches. The switch network includes a total positive output bus and a total negative output bus, which are connected to the load. The switch network is equipped with a preset interface and an impedance matching function unit 2, used to receive real-time monitored liquid parameters (Z, F) and customer preset targets (Z0, F1, F2). x , F x), dynamically calculates the optimal sterilization parameters (E) through a built-in algorithm. x , I pulse_x ) and the corresponding power matching parameters (N) x M x It also includes a preset interface and impedance matching function unit 3, used to receive real-time monitored liquid parameters (Z, F) and customer preset targets (Z). x , F x ), dynamically calculates the optimal sterilization parameters (E) through a built-in algorithm. x , I pulse_x ) and the corresponding power matching parameters (N) x M x (P / S).

[0043] For the parallel connection mode of the output modules: close the switch between the positive terminals of all modules and the total positive output bus, i.e., P of each module _i Connect to P _out Close the switches between the negative terminals of all modules and the total negative output bus, and the N_ of each module i Connect to N _out At this point, all modules are connected in parallel.

[0044] For the output module series mode: close the switch between the positive terminal of the i-th module and the total positive output bus, P1 is connected to P... _out Close the switch between the negative terminal of module M and the total negative output bus, N_M connected to N _out For i from 1 to M-1, close the switch between the negative terminal of the i-th module and the positive terminal of the (i+1)-th module, N _i P {i+1} At this point, all modules are connected in series.

[0045] For the output module hybrid mode, taking the parallel connection of two modules and then the series connection of a third module as an example: Assume that the first and second modules are connected in parallel, and then connected in series with the third module; the specific steps are as follows: Connect the first and second modules in parallel: close the switches P1 and P2 to a sub-positive bus, and close the switches N1 and N2 to a sub-negative bus; connect the sub-positive bus to the total positive output bus or as the starting point of the series chain; connect the sub-negative bus to the positive terminal of the third module, that is, connect the connection point of N1 and N2 to P3; connect the negative terminal of the third module to the total negative output bus.

[0046] Built-in algorithms such as Figure 7As shown, specifically: based on the flow velocity parameter F of the liquid food in the production line and the impedance parameter Z of the target liquid, i.e., the type of liquid food, and according to the customer's preset liquid impedance and flow velocity (Zx, Fx), the pulse electric field intensity value Ex and the pulse power current value Ipulse_x for sterilization are calculated. Based on the (Ex, Ipulse_x) values, the number of parallel modules Nx, the number of modules Mx, and the external matching method (P / S) of the MIP-MOM pulse electric field generator are matched, i.e., the power matching parameters (Nx, Mx, P / S). The system automatically matches the system modules according to the matching instructions, outputs the optimal sterilization pulse electric field parameters, and at the same time reduces necessary redundant design, improves power conversion efficiency, reduces costs, and is compatible with the pulse electric field sterilization requirements of various types of liquid food without changing the production line hardware configuration.

[0047] Using Saber circuit simulation software, the pulse characteristics of the MIP-MOM architecture were simulated. The simulation software was used according to... Figure 2 The single-module structure is based on Figure 5 The MIP-MOM architecture simulation topology was built. The outputs of two LTD modules were connected in parallel. Each module was considered a new module after being grouped together by four-stage energy storage unit modules in parallel. The outputs of the three newly formed modules were then connected in series to form a parallel group followed by a series connection. This resulted in a MIP-MOM structure with parallel-then-series connections. The DC input voltage was set to 1000V, and the PWM signal was set to a frequency of 1kHz and a pulse width of 5μs. A purely resistive 200Ω resistor was used as the load.

[0048] The voltage and current parameters of the new module formed by three parallel connections are compared with the overall system output. The variation of its output voltage conforms to the voltage superposition principle of multi-module series connection, while the output current characteristics are consistent with the current distribution relationship under the external parallel architecture. To comprehensively evaluate the performance of different architectures, the output voltage waveforms of three system architectures—intra-parallel connection, external parallel connection, intra-parallel connection, and external series connection—are compared.

[0049] When the output voltage amplitude is the same, the pulse rise and fall times are shortest for parallel connections within and outside the group, followed by MIP-MOM, while the pulse edges are slowest for parallel connections within and outside the group. Therefore, the architecture of the MIP-MOM high-voltage pulse electric field generator system within the group aims to control the influence of distributed parameters as much as possible during the series-parallel connection process, ensuring high-quality waveform output and power equivalence, thereby meeting the needs of certain specific applications.

[0050] Example

[0051] Bacteria are sterilized using a high-voltage pulsed electric field. The specific operating procedure is as follows: First, according to... Figure 8As shown, the original bacterial culture sample was diluted to a preset concentration. It was then thoroughly shaken to ensure uniform bacterial distribution in the sample solution. Next, the homogeneous solution to be treated was introduced into a pre-designed treatment chamber, while an untreated control group was also included. Before treatment, 100 μL of the control group sample was spread onto a petri dish. The treatment chamber was then sealed with plastic screws to prevent contamination from airborne bacteria. The high-voltage and low-voltage electrodes within the treatment chamber were then connected to a high-voltage pulsed electric field generator. The generator parameters were set, and the generator was activated, subjecting the sample to sterilization under a uniform pulsed electric field. After sterilization, 100 μL of both the treated and control samples were spread onto petri dishes. The dishes were incubated at 37°C for 24 hours. Finally, the colony counts in the petri dishes of the experimental and control groups were observed, and the sterilization effect of the high-voltage pulsed electric field treatment was evaluated using the plate count method.

[0052] High-voltage pulsed electric field sterilization technology is mainly used to target pathogenic bacteria such as Escherichia coli, Listeria, and Staphylococcus aureus in flowing liquid foods. To verify the sterilization effect of the pulsed electric field generator studied in this paper, this section uses Escherichia coli as the target bacterium and experimentally verifies the sterilization effect of the liquid in a static state. Escherichia coli (E. coli) is a Gram-negative short rod-shaped bacterium with a size of 0.5 μm × (1~3) μm (diameter × length) and no spores. Since it is widely present in liquid foods such as various fruit juices and dairy products, choosing E. coli as the target bacterium for sterilization is representative.

[0053] The proposed MIP-MOM structure was used to generate high-voltage pulses for sterilization experiments, maximizing system output power while maintaining the required output voltage level. The entire system consisted of ten single-module LTDs, with each module's output terminal connected in parallel and then in series. The input voltage was set to 600V, the repetition frequency to 1kHz, and the pulse width to 5μs. Sterile water was used to dilute the E. coli concentration in deionized water to 5×10⁶ CFU / mL before loading it into the treatment chamber. During static treatment, the liquid to be treated was only contained within the cylindrical region. A water pump circulated sterile water through the interlayer between the cube and the cylinder to help cool the reactor and eliminate the thermal effect on E. coli activity. The distance between the high-voltage and low-voltage electrodes in the treatment chamber was controlled at 1cm, and the treatment time ranged from 0 to 50s.

[0054] For each time gradient, 100 μL of the treated liquid was evenly spread onto the surface of the culture medium and then incubated at 37°C for 24 hours. Figure 9As can be seen, the number of colonies on the surface of the untreated control group culture medium was densely distributed and could not be counted. After 10 seconds of treatment, a significant effect was observed, with a significant reduction in the number of colonies. After 20 seconds, the number of colonies on the culture dishes of the experimental group had been greatly reduced. After 30 seconds, the number of colonies on the culture dishes of the experimental group had been further reduced, and after 40 seconds, almost all the colonies had disappeared.

[0055] The pulsed electric field generator proposed in this invention exhibits varying bactericidal effects on flowing liquids. From an energy perspective, the longer the pulsed electric field is applied to the liquid, the higher the mortality rate of pathogenic bacteria. Eventually, a bottleneck is reached; further increasing the pulse treatment time gradually increases the ohmic heat in the liquid, thus amplifying the thermal effect on sterilization. While a certain degree of temperature increase contributes to enhanced sterilization, exceeding a certain range can also affect the properties of the liquid itself.

[0056] For dynamic sterilization, the MIP-MOM load-matched system architecture is still selected, with other parameters set the same as in static treatment: input voltage 600V, repetition frequency 1kHz, pulse width 5μs, and initial E. coli concentration in the liquid to be treated 5×10⁶ CFU / mL. During dynamic treatment, the entire treatment chamber can hold approximately 300mL of liquid. A circulation pump circulates the liquid throughout the chamber, ensuring all liquid to be treated flows into the pulsed electric field region. The sterilization effect over time is shown below. Figure 10 As shown.

[0057] Using the control group, i.e., the untreated liquid culture dish, as a reference, the sterilization effect was already evident after 60 seconds of flow treatment. The number of colonies on the culture dish was significantly reduced after 120 seconds, less than 100 colonies on the culture dish after 180 seconds, less than 20 colonies on the culture dish after 240 seconds, and the sterilization effect was basically 100% after 300 seconds.

[0058] This invention combines the advantages of current superposition in parallel connections within a group with the advantages of voltage superposition in series connections outside the group through a composite structure such as "parallel first, then series". This architecture enables a single generator platform to cover a wide range of loads from high impedance to low impedance, ensuring high voltage output while providing the ability to deliver large current, significantly improving the application range and energy efficiency of pulse generators.

Claims

1. A high-voltage pulse electric field generator system with in-group parallel connection and out-of-group matching, comprising at least one module at the input end and at least one module at the output end, characterized in that: Each input module includes multiple modules. The input terminals of all modules are connected in parallel to the same low-voltage DC source. The output modules can be flexibly configured in parallel, series, or any combination thereof according to the actual load impedance characteristics. The control part adopts PWM technology for regulation. The number of modules and the number of PWM signals are the same. They are converted into N synchronization signals through fiber optic isolation circuits to ensure that all modules work synchronously.

2. The high-voltage pulse electric field generator system with intra-group parallel connection and inter-group matching as described in claim 1, characterized in that: The connection method and number of modules for the output ports are determined by the user based on actual application requirements, such as different processing chamber structures, types of liquid food, food flow rates, processing temperatures, and required field strength parameters, to match the appropriate number of power modules and the cascading structure.

3. The high-voltage pulse electric field generator system with intra-group parallel connection and inter-group matching as described in claim 2, characterized in that: With all the output terminals of a single input module connected in parallel, the system output voltage remains the same as the output voltage of a single module, while the total output current is the sum of the currents of each module, i.e., I0. total = ∑I i .

4. The high-voltage pulse electric field generator system with intra-group parallel connection and inter-group matching as described in claim 3, characterized in that: With all modules connected in series at their outputs, the system output current remains constant, while the total output voltage is the sum of the voltages of each module, i.e., U. total = ∑U i .

5. A modular drawer-type power switch network with intra-group parallel connection and inter-group matching of high-voltage pulse electric field, characterized in that: The system includes multiple drawers (1), each drawer containing a module as described in any one of claims 1-4. Each module has two output terminals: a high-voltage terminal and a low-voltage terminal. These terminals are connected to different busbars or directly to each other via controllable switches. The switching network includes a total positive output bus and a total negative output bus, which are connected to the load. The switching network is equipped with a preset interface and an impedance matching function unit (2) for receiving real-time monitored liquid parameters (Z, F) and customer preset targets (Z). x , F x ), dynamically calculates the optimal sterilization parameters (E) through a built-in algorithm. x , I pulse_x ) and the corresponding power matching parameters (N) x M x It also includes a preset interface and impedance matching function unit (3), used to receive real-time monitored liquid parameters (Z, F) and customer preset targets (Z). x , F x ), dynamically calculates the optimal sterilization parameters (E) through a built-in algorithm. x , I pulse_x ) and the corresponding power matching parameters (N) x M x (P / S).

6. The modular drawer-type power switch network with intra-group parallel-external matching high-voltage pulse electric field as described in claim 5, characterized in that: The built-in algorithm specifically works as follows: based on the flow velocity parameter F of the liquid food in the production line and the impedance parameter Z of the target liquid (i.e., the type of liquid food), and according to the customer's preset liquid impedance and flow velocity (Z... x F x ), calculate the pulse electric field intensity value E that achieves sterilization. x and pulse power current value I pulse_x According to (E) x I pulse_x The value N matches the number of modules N connected in parallel within the group of the MIP-MOM pulse electric field generator. x Number of modules M x And the module external matching method (P / S), i.e., power matching parameters (N x M x (P / S), the system automatically matches the system module according to the matching instruction and outputs the optimal sterilization pulse electric field parameters.

7. The modular drawer-type power switch network with intra-group parallel-external matching high-voltage pulse electric field as described in claim 5, characterized in that: For the parallel connection mode of the output modules: close the switch between the positive terminals of all modules and the total positive output bus, i.e., P of each module _i Connect to P _out Close the switches between the negative terminals of all modules and the total negative output bus, and the N_ of each module i Connect to N _out At this point, all modules are connected in parallel.

8. The modular drawer-type power switch network with intra-group parallel-external matching high-voltage pulse electric field as described in claim 5, characterized in that: For the output module series mode: close the switch between the positive terminal of the i-th module and the total positive output bus, P1 is connected to P... _out Close the switch between the negative terminal of module M and the total negative output bus, N_M connected to N _out For i from 1 to M-1, close the switch between the negative terminal of the i-th module and the positive terminal of the (i+1)-th module, N _i P {i+1} At this point, all modules are connected in series.

9. The modular drawer-type power switch network with intra-group parallel-external matching high-voltage pulse electric field as described in claim 5, characterized in that: For the output module hybrid mode, taking the parallel connection of two modules and then the series connection of a third module as an example: Assume that the first module and the second module are connected in parallel, and then connected in series with the third module; The specific steps are as follows: Connect the first module and the second module in parallel: Close the switches P1 and P2 to a sub-positive bus, and close the switches N1 and N2 to a sub-negative bus; Connect the sub-positive bus to the total positive output bus or use it as the starting point of the series chain; Connect the sub-negative bus to the positive terminal of the third module, i.e., connect the connection point of N1 and N2 to P3; connect the negative terminal of the third module to the main negative output bus.

Images