Power management module system of underwater power supply equipment

Abstract

The utility model relates to the technical field of underwater power supply equipment, in particular to a power supply management module system of underwater power supply equipment, which comprises an electrical parameter acquisition unit, a power supply management module and a power supply management module, the intelligent management control unit is connected with the electrical parameter acquisition unit and is used for generating a PWM control signal according to the electrical parameters; the PWM isolation driving circuit is used for performing high-voltage isolation and amplification on the PWM control signal; the H-bridge conversion circuit is used for converting a high-voltage direct-current power supply into a high-frequency pulse power supply under the driving control of the PWM isolation driving circuit; the high-frequency high-voltage pulse transformer is used for converting the high-frequency pulse power supply; the rectifying and filtering circuit is used for rectifying and filtering the high-frequency pulse power supply to generate a stable high-voltage high-power direct-current power supply; according to the utility model, the problems of high-voltage isolation driving, electric energy long-distance transmission loss, voltage attenuation and unmanned monitoring of special power utilization scenes are solved for high-voltage conversion control over 1000VDC.

Description

Technical Field

[0001] This utility model relates to the field of underwater power supply equipment technology, and specifically to a power management module system for underwater power supply equipment. Background Technology

[0002] The power management module of the water equipment utilizes PWM control technology to achieve multiple functions, including power conversion and regulation, energy saving and efficiency improvement, circuit and load protection, and intelligent control. These functions are crucial for ensuring the normal operation of the water equipment, improving efficiency, and extending its lifespan.

[0003] PWM control technology is a widely used control technology in the field of DC power conversion. PWM drive is most commonly used for low-voltage conversion control below 600VDC. However, for high-voltage conversion control above 1000VDC, it cannot solve the problems of high-voltage isolation drive, power loss and voltage attenuation during long-distance power transmission, and unmanned monitoring in special power consumption scenarios.

[0004] Therefore, it is necessary to design a power management module system for underwater power supply equipment to solve the above problems. Summary of the Invention

[0005] To address the problems of existing technologies, this utility model provides a power management module system for underwater power supply equipment, including an electrical parameter acquisition unit for acquiring electrical parameters of the power management module;

[0006] Intelligent management and control unit: connected to the electrical parameter acquisition unit, used to generate PWM control signals based on electrical parameters;

[0007] PWM isolation drive circuit: The signal output terminal of the intelligent management and control unit is connected to the input terminal of the PWM isolation drive circuit, which is used to perform high voltage isolation and amplification of the PWM control signal;

[0008] H-bridge converter circuit: The output of the PWM isolation drive circuit is connected to the input of the H-bridge converter circuit, which is used to convert the high-voltage DC power supply into a high-frequency pulse power supply under the drive and control of the PWM isolation drive circuit.

[0009] High-frequency high-voltage pulse transformer: The H-bridge converter circuit is located on one side of the high-frequency high-voltage pulse transformer. The output terminal of the high-frequency pulse power supply converted by the H-bridge converter circuit is connected to one side of the high-frequency high-voltage pulse transformer for converting the high-frequency pulse power supply.

[0010] Rectifier and filter circuit: The rectifier and filter circuit is located on the other side of the high-frequency high-voltage pulse transformer and is connected to the other side of the high-frequency high-voltage pulse transformer; it is used to rectify and filter the high-frequency pulse power supply to generate a stable high-voltage high-power DC power supply.

[0011] Furthermore, the intelligent management control unit is equipped with a communication interface and an AD acquisition interface. The intelligent management control unit is connected to the power management module via the communication interface, and is connected to the electrical parameter acquisition unit via the AD acquisition interface. This unit is used to acquire the electrical parameters of the power management module, convert the electrical parameters into digital signals, and then analyze and process them to generate PWM control signals.

[0012] Furthermore, the PWM isolation drive circuit includes an isolation unit for achieving electrical isolation between the input side and the output side. The input side of the isolation unit receives the PWM control signal, and the output side transmits the isolated signal to the drive unit. The isolation unit adopts a two-stage opto-isolation structure to achieve effective isolation of high voltage conversion above 1000VDC, ensuring safe and stable signal transmission between the high voltage side and the low voltage side.

[0013] A driving unit, connected to the output side of the isolation unit, is used to amplify the isolated PWM signal to provide sufficient driving capability to drive the switching transistors in the H-bridge converter circuit. The driving unit controls the switching transistors in the H-bridge converter circuit to turn on and off according to the logic level changes of the input PWM signal. The output terminal of the driving unit is connected to the control terminal of the switching transistors in the H-bridge converter circuit.

[0014] The protection unit, connected between the drive unit and the H-bridge converter circuit, is used to monitor the electrical parameters in the H-bridge converter circuit. When an abnormal electrical parameter is detected, it cuts off the drive signal or adjusts the strength of the drive signal to protect the switching transistor and the H-bridge converter circuit from damage.

[0015] Furthermore, the rectifier and filter circuit is composed of a rectifier bridge, an inductor, and a first capacitor connected together; and a second capacitor is connected in parallel with the first capacitor, and a secondary winding is connected to the rectifier bridge for receiving high-frequency pulse power signals;

[0016] Furthermore, the H-bridge converter circuit includes a first group of series switches, a second group of series switches, a third group of series switches, and a fourth group of series switches;

[0017] The first group of series-connected switches includes a first switch Q1 and a second switch Q2 connected in series.

[0018] The second group of series-connected switching transistors includes a third switching transistor Q3 and a fourth switching transistor Q4 connected in series in sequence.

[0019] The third group of series-connected switches includes the fifth switch Q5 and the sixth switch Q6 connected in series in sequence.

[0020] The fourth group of series-connected switches includes the seventh switch Q7 and the eighth switch Q8 connected in series in sequence.

[0021] The first group of series-connected switching transistors and the third group of series-connected switching transistors are connected in parallel to the positive terminal of a high-voltage DC power supply; the second group of series-connected switching transistors and the fourth group of series-connected switching transistors are connected in parallel to the negative terminal of a high-voltage DC power supply.

[0022] Output 1 at the midpoint of the connection between the first group of series switches and the third group of series switches, and output 2 at the midpoint of the connection between the second group of series switches and the fourth group of series switches. The high-frequency pulse power supply obtained by the H-bridge converter circuit is connected to both ends of the primary winding of the high-frequency high-voltage pulse transformer.

[0023] The gate (G) terminals of the switching transistors Q1, Q2, Q3, Q4, Q5, Q6, Q7, and Q8 in the PWM isolation drive circuit and the H-bridge converter circuit are electrically connected respectively, and are used to transmit drive signals G1, G2, G3, G4, G5, G6, G7, and G8.

[0024] Furthermore, the drive signals G1, G2, G3, G4, G5, G6, G7, and G8 are all controlled by the drive unit to be turned on and off.

[0025] Furthermore, the high-frequency high-voltage pulse transformer includes a magnetic core for providing a magnetic field path;

[0026] The primary winding, wound on the magnetic core, is used to connect to a high-frequency pulse power supply.

[0027] The secondary winding, wound on the magnetic core, has at least three sets of rectifier and filter circuits connected in parallel to convert the electrical energy of the primary winding into corresponding three voltage outputs.

[0028] An insulating structure covers the magnetic core, primary winding, and secondary winding, enabling the high-frequency high-voltage pulse transformer to have a withstand voltage rating of 3500VDC or higher, ensuring safe and reliable operation in a high-voltage DC power conversion system. The insulating structure includes at least one layer of insulating tape and an insulating varnish coating. The insulating tape is wrapped between the winding and the magnetic core, as well as between the winding layers, and the insulating varnish coating covers the entire exterior of the transformer.

[0029] Furthermore, the primary winding adopts a single-winding structure;

[0030] Furthermore, the two-stage opto-isolation structure includes a first optocoupler and a second optocoupler. The signal output terminal of the intelligent management control unit is connected to the input terminal of the first optocoupler to receive the PWM control signal from the intelligent management control unit and convert it into an optical signal. The optical emitting and receiving terminals of the first and second optocouplers have an insulation withstand voltage rating of over 1000VDC to meet the isolation requirements under high-voltage environments of over 1000VDC. The output terminal of the second optocoupler is connected to the drive unit to receive the optical signal from the first optocoupler and convert it back into an electrical signal to drive the drive unit, thus achieving electrical isolation between the intelligent management control unit and the drive unit.

[0031] The beneficial effects of this utility model are:

[0032] This invention uses an intelligent management and control unit to generate PWM control signals based on electrical parameters.

[0033] This invention utilizes an intelligent management and control unit to generate a PWM control signal based on electrical parameters. This PWM control signal undergoes 1500VDC high-voltage isolation and amplification via a PWM isolation drive circuit, directly driving the switches of the H-bridge converter circuit to turn on and off as needed. Under PWM control, the switches convert the high-voltage DC power supply into a high-frequency pulse power supply. After further conversion by a high-frequency high-voltage pulse transformer and rectification and filtering by a rectifier and filter circuit, a stable 900VDC power supply is generated. For high-voltage conversion control above 1000VDC, this invention solves the problems of high-voltage isolation drive, power loss and voltage attenuation during long-distance power transmission, and unmanned monitoring in special power consumption scenarios. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the power management module system connection of the underwater power supply equipment of this utility model;

[0035] Figure label:

[0036] In the diagram: 1-Intelligent management and control unit, 2-PWM isolation drive circuit, 3-H-bridge converter circuit, 4-High-frequency high-voltage pulse transformer, 5-Rectifier and filter circuit. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] Please see Figure 1This utility model provides a power management module system for underwater power supply equipment, comprising:

[0039] Electrical parameter acquisition unit: used to acquire electrical parameters of the power management module;

[0040] The electrical parameter acquisition unit consists of a current sensor and a voltage sensor, which acquire the current / voltage signals from the power management module.

[0041] Intelligent management and control unit 1: connected to the electrical parameter acquisition unit, used to generate PWM control signals based on electrical parameters;

[0042] The intelligent management control unit is equipped with a communication interface and an AD acquisition interface. The intelligent management control unit is connected to the power management module via the communication interface and to the electrical parameter acquisition unit via the AD acquisition interface. The intelligent management control unit is used to acquire the electrical parameters of the power management module, and convert the electrical parameters into digital signals for analysis and processing to generate PWM control signals.

[0043] It should be noted that the electrical parameter acquisition unit includes a current sensor and a voltage sensor; the electrical parameters are current / voltage signals; the intelligent management control unit is connected to the power management module via an RS422 or CAN bus through a communication interface; and the intelligent management control unit is connected to the power management module via the communication interface to acquire the current / voltage signals of the power management module of the electrical equipment, and converts the electrical parameters into digital signals for analysis and processing to generate PWM control signals; thus solving the problem of unattended operation in special scenarios;

[0044] PWM isolation drive circuit 2: The signal output terminal of the intelligent management and control unit 1 is connected to the input terminal of the PWM isolation drive circuit 2, which is used to perform high voltage isolation and amplification of the PWM control signal;

[0045] The PWM isolation drive circuit 2 includes an isolation unit for achieving electrical isolation between the input side and the output side. The isolation unit adopts a two-stage opto-isolation structure to achieve effective isolation of the DC 1500V high voltage conversion, ensuring safe and stable signal transmission between the high voltage side and the low voltage side. The input side of the isolation unit receives the PWM control signal, and the output side transmits the isolated signal to the drive unit.

[0046] A driving unit, connected to the output side of the isolation unit, is used to amplify the isolated PWM signal to provide sufficient driving capability to drive the switching transistors in the H-bridge converter circuit. The driving unit controls the switching transistors in the H-bridge converter circuit to turn on and off according to the logic level changes of the input PWM signal. The output terminal of the driving unit is connected to the control terminal of the switching transistors in the H-bridge converter circuit.

[0047] The protection unit, connected between the drive unit and the H-bridge converter circuit, is used to monitor the electrical parameters in the H-bridge converter circuit. When an abnormal electrical parameter is detected, it cuts off the drive signal or adjusts the strength of the drive signal to protect the switching transistor and the H-bridge converter circuit from damage.

[0048] The two-stage opto-isolation structure includes a first optocoupler and a second optocoupler. The signal output terminal of the intelligent management control unit is connected to the input terminal of the first optocoupler to receive the PWM control signal from the intelligent management control unit and convert it into an optical signal. The optical emitting and receiving terminals of the first and second optocouplers have an insulation withstand voltage rating of over 1000VDC to meet the isolation requirements under high-voltage environments of over 1000VDC. The output terminal of the second optocoupler is connected to the drive unit to receive the optical signal from the first optocoupler and convert it back into an electrical signal to drive the drive unit. This achieves electrical isolation between the intelligent management control unit and the drive unit while maintaining signal integrity and accuracy.

[0049] H-bridge converter circuit 3: The output terminal of PWM isolation drive circuit 2 is connected to the input terminal of H-bridge converter circuit 3, which is used to convert high-voltage DC power supply into high-frequency pulse power supply under the drive control of PWM isolation drive circuit 2.

[0050] The H-bridge converter circuit 3 includes a first group of series-connected switches, a second group of series-connected switches, a third group of series-connected switches, and a fourth group of series-connected switches.

[0051] The first group of series-connected switches includes a first switch Q1 and a second switch Q2 connected in series.

[0052] The second group of series-connected switching transistors includes a third switching transistor Q3 and a fourth switching transistor Q4 connected in series in sequence.

[0053] The third group of series-connected switches includes the fifth switch Q5 and the sixth switch Q6 connected in series in sequence.

[0054] The fourth group of series-connected switches includes the seventh switch Q7 and the eighth switch Q8 connected in series in sequence.

[0055] The first group of series-connected switching transistors and the third group of series-connected switching transistors are connected in parallel to the positive terminal of a high-voltage DC power supply; the second group of series-connected switching transistors and the fourth group of series-connected switching transistors are connected in parallel to the negative terminal of a high-voltage DC power supply.

[0056] Output 1 at the midpoint of the connection between the first group of series-connected switching transistors and the third group of series-connected switching transistors, and output 2 at the midpoint of the connection between the second group of series-connected switching transistors and the fourth group of series-connected switching transistors. The high-frequency pulse power supply obtained by the H-bridge converter circuit 3 is connected to both ends of the primary winding of the high-frequency high-voltage pulse transformer 4.

[0057] The gates (G) of the switching transistors Q1, Q2, Q3, Q4, Q5, Q6, Q7, and Q8 in the PWM isolation drive circuit 2 and the H-bridge converter circuit 3 are electrically connected to each other, and are used to transmit drive signals G1, G2, G3, G4, G5, G6, G7, and G8 respectively.

[0058] Furthermore, the drive signals G1, G2, G3, G4, G5, G6, G7, and G8 are all controlled by the intelligent management control unit 1 to be turned on and off.

[0059] It should be noted that each switching transistor has a control terminal for receiving PWM control signals to realize switching action. The PWM control signals are provided by the PWM isolation drive circuit 2. The PWM isolation drive circuit 2 performs high-voltage isolation and amplification on the redundant PWM control signals from the intelligent management control unit 1 to drive the control terminals of each switching transistor.

[0060] Among them, the high-frequency high-voltage pulse transformer 4 includes a magnetic core for providing a magnetic field path;

[0061] The primary winding is wound on the magnetic core and is used to connect to a high-frequency pulse power supply. The primary winding adopts a single winding structure.

[0062] The secondary winding, wound on the magnetic core, has at least three sets of rectifier and filter circuits connected in parallel to convert the electrical energy of the primary winding into corresponding three voltage outputs.

[0063] An insulating structure covers the magnetic core, primary winding, and secondary winding, enabling the high-frequency high-voltage pulse transformer 4 to have a withstand voltage rating of 3500VDC or higher, ensuring safe and reliable operation in a high-voltage DC power conversion system. The insulating structure includes at least one layer of insulating tape and an insulating varnish coating. The insulating tape is wrapped between the winding and the magnetic core, as well as between the winding layers, and the insulating varnish coating covers the entire exterior of the transformer.

[0064] High-frequency high-voltage pulse transformer 4: H-bridge conversion circuit 3 is located on one side of the high-frequency high-voltage pulse transformer 4. The high-frequency pulse power output terminal converted by H-bridge conversion circuit 3 is connected to one side of the high-frequency high-voltage pulse transformer 4 for converting the high-frequency pulse power.

[0065] Rectifier and filter circuit 5: The rectifier and filter circuit 5 is located on the other side of the high-frequency high-voltage pulse transformer 4 and is connected to the other side of the high-frequency high-voltage pulse transformer 4; it is used to rectify and filter the high-frequency pulse power supply to generate a stable high-voltage high-power DC power supply.

[0066] The rectifier and filter circuit consists of a rectifier bridge, an inductor, and a first capacitor connected together; a second capacitor is connected in parallel with the first capacitor; and a secondary winding is connected to the rectifier bridge for receiving high-frequency pulse power signals.

[0067] It should be noted that this power management module system solves the problems of high-voltage input conversion, high-power high-voltage conversion, and long-distance telemetry and control. Specifically, the high-voltage DC-DC conversion utilizes a PWM isolation drive circuit 2 (the PWM control signal is provided by the PWM isolation drive circuit 2, which performs high-voltage isolation and amplification on the redundant PWM control signal from the intelligent management control unit 1 before driving the control terminals of each switching transistor) and an H-bridge converter circuit 3. By employing multi-switch superposition and PWM redundancy control technology (the PWM isolation drive circuit drives and controls the 8 switches of the H-bridge converter circuit), the input voltage of the DC-DC converter can be boosted to 2000V DC. The working principle of the DC-DC converter mainly utilizes the energy storage characteristics of capacitors and inductors, through high-frequency switching via controllable switches. When the switch is on, the input power charges the inductor, storing electrical energy in it; when the switch is off, the energy stored in the inductor is released to the load, thus providing a stable voltage output. This process is achieved by controlling the on / off time and period of the switch, i.e., the duty cycle, to regulate the output voltage.

[0068] High-voltage high-power conversion: In the power transfer conversion, the high-frequency pulse power obtained by the H-bridge converter circuit is output in parallel by three sets of rectifier and filter circuits of high-frequency isolation transformer, which increases the applied high-voltage output power to more than 15kW.

[0069] Long-distance telemetry and remote control: The high-frequency isolation transformer adopts a parallel output mode of three sets of rectifier and filter circuits. The three sets of rectifier and filter circuits can be turned on simultaneously or at different times, and multi-stage voltage reduction can be achieved through different combinations. The filtering is achieved by using inductors and capacitors in the rectifier and filter circuit to eliminate or reduce the AC component of DC power. Practical verification has shown that the telemetry and remote control distance of the power management module can be increased to more than 3,500 meters. This solves the problems of power loss and voltage attenuation during long-distance power transmission.

[0070] It should be noted that the intelligent management control unit 1 completes the acquisition, processing, and transmission of electrical parameters of the power management module. Based on upgrade instructions (voltage, current setpoints, etc.), the intelligent management unit generates redundant PWM control signals C1 to C8. These signals are then subjected to high-voltage isolation and amplification (above 1000V) by the PWM isolation drive circuit 2, directly driving the eight switches of the H-bridge to turn on and off as required. Under PWM control, the H-bridge switches convert the high-voltage DC power supply into a high-frequency pulse power supply. After further conversion by the high-frequency high-voltage pulse transformer 4 and rectification and filtering, a stable 900V DC power supply is generated.

[0071] The power management module system is a DC 900V-1500V input to DC 900V voltage regulator. The H-bridge converter circuit 3 uses a first, second, third, and fourth group of series-connected switches. By employing a multi-switch superposition conversion mode, the input DC voltage can be increased to DC 2000V. The H-bridge converter circuit 3 uses a four-stage superposition of switches instead of the traditional two-stage superposition. The high-frequency isolation transformer uses a parallel output of three rectifier and filter circuits. These three circuits can be operated simultaneously or in a time-sharing manner, allowing for multi-stage voltage reduction through different combinations. Filtering, achieved through inductors and capacitors in the rectifier and filter circuits, eliminates or reduces the AC component of the DC voltage. This increases the telemetry and remote control distance of the power management module to over 3500 meters and improves the overall redundancy of the power management module. The primary winding of the high-frequency isolation transformer uses a single winding and is directly driven by the drive signal output from the H-bridge converter circuit 3. This solution addresses the challenges of high-voltage DC-DC high-power conversion from 1500VDC to 900VDC / 15KW, along with high-voltage isolation drive, ensuring the operation of underwater DC power equipment. The high-frequency isolation transformer is manufactured and tested to a withstand voltage of 3500VDC, guaranteeing the safety and reliability of the power management module.

[0072] The intelligent management control unit 1 in the power management module system adopts an embedded computer management control unit, with an additional communication interface and AD acquisition interface. It addresses the issue of unattended operation in special scenarios, such as power supply areas where personnel have difficulty reaching the site, including water-using equipment, high-altitude equipment, aerial equipment, and equipment in desert / Gobi (uninhabited areas). This is achieved through the intelligent management unit. The power management module embeds a small computer system that intelligently analyzes, processes, saves, and transmits the power management module's operating status, input / output parameters, and remote control commands. Data transmission can be accomplished via CAN bus or a dedicated interface, or through a wireless receiver or existing communication network. The key challenges in this application are high-voltage isolation and interference. High-voltage isolation employs a multi-stage step-down DC-DC converter: a 900V–1500V high-voltage DC input is converted to a 48V regulated DC power supply, which is then converted by a general-purpose DC-DC converter module into ±12VDC, 5VDC, and 3VDC to provide operating power for the internal circuitry of the power management module. The solution to high-voltage interference is achieved through enhanced filtering and noise suppression circuitry at the input and output ports of the operating power supply, as well as shielding and isolation measures. Through practical testing, the power management module has been verified to operate safely and reliably at a depth of 3500 meters underwater.

[0073] This application uses an intelligent management control unit to generate PWM control signals based on electrical parameters. The PWM control signals are then isolated and amplified by a PWM isolation drive circuit. The output of the PWM isolation drive circuit is connected to the input of an H-bridge converter circuit, used to convert high-voltage DC power into high-frequency pulse power under the drive control of the PWM isolation drive circuit. The H-bridge converter circuit is located on one side of the high-frequency high-voltage pulse transformer, and the output of the high-frequency pulse power converted by the H-bridge converter circuit is connected to one side of the high-frequency high-voltage pulse transformer for conversion. A rectifier and filter circuit is located on the other side of the high-frequency high-voltage pulse transformer and connected to the other side of the high-frequency high-voltage pulse transformer; it is used to rectify and filter the high-frequency pulse power to generate a stable high-voltage high-power DC power supply. The intelligent management control unit 1 generates redundant PWM control signals C1 to C8 based on upgrade instructions (voltage, current settings, etc.), which are then isolated and amplified by the PWM isolation drive circuit 2 at 1500VDC high voltage, directly driving the eight switches of the H-bridge converter circuit 3 to turn on and off as needed. Under PWM control, the H-bridge switches convert the high-voltage DC power into high-frequency pulse power. After passing through the high-frequency high-voltage pulse transformer 4 and the rectifier and filter circuit 5, a stable 900V DC power supply is generated, realizing high-voltage DC high-power conversion from 1500VDC to 900VDC / 15KW, high-power high-voltage conversion, and long-distance telemetry and control, providing a guarantee for the operation of underwater DC power equipment. For high-voltage conversion control above 1000VDC, it solves the problems of high-voltage isolation drive, power loss and voltage attenuation in long-distance power transmission, and unmanned monitoring in special power consumption scenarios.

[0074] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A power management module system for an underwater power supply device, characterized in that, Includes an electrical parameter acquisition unit: used to acquire electrical parameters of the power management module; Intelligent management and control unit: connected to the electrical parameter acquisition unit, used to generate PWM control signals based on electrical parameters; PWM isolation drive circuit: The signal output terminal of the intelligent management and control unit is connected to the input terminal of the PWM isolation drive circuit, which is used to perform high voltage isolation and amplification of the PWM control signal; H-bridge converter circuit: The output of the PWM isolation drive circuit is connected to the input of the H-bridge converter circuit, which is used to convert the high-voltage DC power supply into a high-frequency pulse power supply under the drive and control of the PWM isolation drive circuit. High-frequency high-voltage pulse transformer: The H-bridge converter circuit is located on one side of the high-frequency high-voltage pulse transformer. The output terminal of the high-frequency pulse power supply converted by the H-bridge converter circuit is connected to one side of the high-frequency high-voltage pulse transformer for converting the high-frequency pulse power supply. Rectifier and filter circuit: The rectifier and filter circuit is located on the other side of the high-frequency high-voltage pulse transformer and is connected to the other side of the high-frequency high-voltage pulse transformer; it is used to rectify and filter the high-frequency pulse power supply to generate a stable high-voltage high-power DC power supply.

2. The power management module system for underwater power supply equipment according to claim 1, characterized in that, The intelligent management control unit is equipped with a communication interface and an AD acquisition interface. The intelligent management control unit is connected to the power management module via the communication interface, and is connected to the electrical parameter acquisition unit via the AD acquisition interface. The intelligent management control unit is used to acquire the electrical parameters of the power management module, and convert the electrical parameters into digital signals for analysis and processing to generate PWM control signals.

3. The power management module system for underwater power supply equipment according to claim 1, characterized in that, The PWM isolation drive circuit includes an isolation unit for achieving electrical isolation between the input side and the output side. The input side of the isolation unit receives the PWM control signal, and the output side transmits the isolated signal to the drive unit. The isolation unit adopts a two-stage opto-isolation structure to achieve effective isolation of high voltage conversion above 1000VDC, ensuring safe and stable signal transmission between the high voltage side and the low voltage side. A driving unit, connected to the output side of the isolation unit, is used to amplify the isolated PWM signal to provide sufficient driving capability to drive the switching transistors in the H-bridge converter circuit. The driving unit controls the switching transistors in the H-bridge converter circuit to turn on and off according to the logic level changes of the input PWM signal. The output terminal of the driving unit is connected to the control terminal of the switching transistors in the H-bridge converter circuit. The protection unit, connected between the drive unit and the H-bridge converter circuit, is used to monitor the electrical parameters in the H-bridge converter circuit. When an abnormal electrical parameter is detected, it cuts off the drive signal or adjusts the strength of the drive signal to protect the switching transistor and the H-bridge converter circuit from damage.

4. The power management module system for underwater power supply equipment according to claim 1, characterized in that, The rectifier and filter circuit consists of a rectifier bridge, an inductor, and a first capacitor connected together; and a second capacitor is connected in parallel with the first capacitor. The secondary winding is connected to the rectifier bridge to receive high-frequency pulse power signals.

5. The power management module system for underwater power supply equipment according to claim 3, characterized in that, The H-bridge converter circuit includes a first group of series switches, a second group of series switches, a third group of series switches, and a fourth group of series switches. The first group of series-connected switches includes a first switch Q1 and a second switch Q2 connected in series. The second group of series-connected switching transistors includes a third switching transistor Q3 and a fourth switching transistor Q4 connected in series in sequence. The third group of series-connected switches includes the fifth switch Q5 and the sixth switch Q6 connected in series in sequence. The fourth group of series-connected switches includes the seventh switch Q7 and the eighth switch Q8 connected in series in sequence. The first group of series-connected switching transistors and the third group of series-connected switching transistors are connected in parallel to the positive terminal of a high-voltage DC power supply; the second group of series-connected switching transistors and the fourth group of series-connected switching transistors are connected in parallel to the negative terminal of a high-voltage DC power supply. Output 1 at the midpoint of the connection between the first group of series switches and the third group of series switches, and output 2 at the midpoint of the connection between the second group of series switches and the fourth group of series switches. The high-frequency pulse power supply obtained by the H-bridge converter circuit is connected to both ends of the primary winding of the high-frequency high-voltage pulse transformer. The gate (G) terminals of the switching transistors Q1, Q2, Q3, Q4, Q5, Q6, Q7, and Q8 in the PWM isolation drive circuit and the H-bridge converter circuit are electrically connected respectively, and are used to transmit drive signals G1, G2, G3, G4, G5, G6, G7, and G8. Furthermore, the drive signals G1, G2, G3, G4, G5, G6, G7, and G8 are all controlled by the drive unit to be turned on and off.

6. The power management module system for underwater power supply equipment according to claim 5, characterized in that, A high-frequency, high-voltage pulse transformer includes a magnetic core to provide a magnetic field path; The primary winding is wound on the magnetic core and is used to connect to a high-frequency pulse power supply; The secondary winding, wound on the magnetic core, has at least three sets of rectifier and filter circuits connected in parallel to convert the electrical energy of the primary winding into corresponding three voltage outputs. An insulating structure covers the magnetic core, primary winding, and secondary winding, enabling the high-frequency high-voltage pulse transformer to have a withstand voltage rating of 3500VDC or higher, ensuring safe and reliable operation in a high-voltage DC power conversion system. The insulating structure includes at least one layer of insulating tape and an insulating varnish coating. The insulating tape is wrapped between the winding and the magnetic core, as well as between the winding layers, and the insulating varnish coating covers the entire exterior of the transformer.

7. The power management module system for underwater power supply equipment according to claim 6, characterized in that, The primary winding adopts a single winding structure.

8. The power management module system for underwater power supply equipment according to claim 3, characterized in that, The two-stage opto-isolation structure includes a first optocoupler and a second optocoupler. The signal output terminal of the intelligent management control unit is connected to the input terminal of the first optocoupler to receive the PWM control signal from the intelligent management control unit and convert it into an optical signal. The optical emitting and receiving terminals of the first and second optocouplers have an insulation withstand voltage rating of over 1000VDC to meet the isolation requirements under high-voltage environments of over 1000VDC. The output terminal of the second optocoupler is connected to the drive unit to receive the optical signal from the first optocoupler and convert it back into an electrical signal to drive the drive unit, thus achieving electrical isolation between the intelligent management control unit and the drive unit.

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