High-voltage direct-current power supply system applying parallel resonance high-power load

Abstract

The utility model discloses a high-voltage direct-current power supply system applying a parallel resonance high-power load. Comprising a 380V three-phase power supply, a three-phase switch, a PFC circuit, an inverter circuit, an LC resonance circuit, a current detection module, a transformer, a rectification filtering module, a series switch, a parallel switch, an STM32 controller, a main circuit switch control module, a voltage detection module and an upper computer control and monitoring module, and the 380V three-phase power supply, the three-phase switch, the PFC circuit and the inverter circuit are connected in sequence. And the inverter circuit is also connected with the transformer through the LC resonance circuit. The design is suitable for power supply requirements of high-power loads such as solid-state extension sets. By optimizing the circuit design, high energy efficiency and stable voltage output of the high-voltage power supply are realized, so that the requirements of a specific application environment are met.

Description

Technical Field

[0001] The utility model relates to the technical field of power systems, in particular to a high-voltage direct current power supply system applying parallel resonance high-power loads. Background Art

[0002] With the rapid advancement of science and technology, high-voltage DC power supply systems are increasingly being used in modern industry, medicine, and scientific research. In particular, high-end applications such as solid-state devices and terahertz technology place increasing demands on power supply system performance. Traditional power supply design methods often struggle to meet the demands of modern equipment in terms of conversion efficiency, stability, and power output. In recent years, resonant power supply technology has become a research hotspot due to its advantages in improving energy conversion efficiency and reducing system size and weight.

[0003] Research has shown that high-voltage DC power supplies based on LCC resonant topology can effectively reduce switching losses and improve efficiency. By selecting the appropriate resonant frequency and switching control strategy, the output voltage can be precisely adjusted to meet the design requirements of high-voltage DC power supply systems.

[0004] Furthermore, the parallel-resonant high-voltage DC power supply design achieves high power density and a compact system layout, making it particularly suitable for high-power and high-frequency applications. This design effectively handles voltage fluctuations caused by load changes, improving system stability and reliability.

[0005] Existing high-voltage DC power supply systems typically use traditional rectification and filtering, which has limitations in conversion efficiency, stability, and adaptability. To improve efficiency, designers often incorporate PFC modules and high-efficiency DC-DC converter circuits. However, the introduction of these modules often complicates system design and increases the difficulty of debugging and maintenance.

[0006] Existing high-voltage DC power supply systems have the following shortcomings in design and application:

[0007] 1. Low conversion efficiency: Traditional rectification and filtering methods result in low energy conversion efficiency, especially when processing high-power loads, resulting in large energy losses and increased operating costs.

[0008] 2. Insufficient stability: When the load changes, the output voltage stability of the existing power supply system is poor, which can easily cause electronic equipment to work unstably or even be damaged.

[0009] 3. Complex control logic: The existing power supply system control logic is usually complex and difficult to debug and maintain, which affects the reliability and maintainability of the system.

[0010] 4. Thermal management issues: If the heat generated by high-power power supplies during operation cannot be effectively managed, it will affect the stability and life of the equipment.

[0011] 5. Lack of real-time monitoring and protection: Existing technologies often lack effective real-time monitoring mechanisms and are unable to respond promptly to abnormal changes in voltage and current, increasing the risk of system failure. Utility Model Content

[0012] In order to make up for the deficiencies of the prior art, the embodiments of the present application propose a high-voltage DC power supply system using parallel resonant high-power loads to solve the problems existing in the prior art.

[0013] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0014] A high-voltage direct current (HVDC) power supply system for a parallel resonant high-power load includes a 380V three-phase power supply, a three-phase switch, a power factor correction (PFC) circuit, an inverter circuit, an LC resonant circuit, a current detection module, a transformer, a rectifier and filter module, a series switch, a parallel switch, an STM32 controller, a main circuit switch control module, a voltage detection module, and a host computer control and monitoring module. The 380V three-phase power supply, the three-phase switch, the PFC circuit, and the inverter circuit are sequentially connected; the inverter circuit is further connected to the transformer via the LC resonant circuit; the transformer is further connected to the rectifier and filter module; the rectifier and filter module outputs a DC voltage of 800V to the high-voltage load via the series switch and the parallel switch; a current detection module is further provided between the inverter circuit and the transformer; the current detection module is connected to the STM32 controller; the PFC circuit is further connected to the STM32 controller via the voltage detection module; the STM32 controller is further connected to the three-phase switch, the series switch, and the parallel switch, respectively, to control the actions of the three switches.

[0015] As a further technical solution of the present invention: the STM32 controller is also connected to a host computer control and monitoring module.

[0016] As a further technical solution of the present invention: the model of the STM32 controller is STM32F407.

[0017] As a further technical solution of the present invention: the STM32 controller also collects the voltage signal and current signal output by the rectifier and filter module.

[0018] As a further technical solution of the present invention: a temperature relay is provided in the PFC circuit, which cuts off the circuit when the temperature exceeds a set value; and connects the circuit when the temperature drops below the set value.

[0019] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

[0020] 1. Improve conversion efficiency: By adopting LC resonance technology and optimized DC-DC conversion design, the present invention can significantly improve energy conversion efficiency and reduce energy loss in high-power applications.

[0021] 2. Enhanced stability: The present invention ensures the stability of the output voltage through real-time voltage monitoring and dynamic adjustment of control strategies to meet the needs of load changes.

[0022] 3. Simplified control logic: Through integrated signal processing logic and PWM drive signals, the present invention simplifies the control circuit and improves the debuggability and maintainability of the system.

[0023] 4. Optimized thermal management: The chassis designed by the present invention includes a water-cooling plate, which effectively manages the heat generated during operation and improves the stability and service life of the equipment.

[0024] 5. Real-time monitoring and protection: The present invention introduces a protection signal feedback mechanism and real-time monitoring of voltage and current to ensure that the system can respond promptly under abnormal circumstances and reduce the risk of failure. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a circuit diagram of a high-voltage DC power supply system that uses parallel resonant high-power loads. DETAILED DESCRIPTION

[0026] The following is a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] Example 1, as Figure 1 As shown in the figure, a high-voltage DC power supply system using parallel resonant high-power loads has the following basic structure and working process:

[0028] 1. Input module:

[0029] (1) Use 380V three-phase AC power supply and connect it to the main circuit.

[0030] (2) A two-phase switch is set at the input end to realize the control of the power supply.

[0031] 2. Rectifier module:

[0032] (1) A full-bridge rectifier circuit is used to convert 380V AC into DC. High-power rectifier diodes are used to ensure stability under heavy load conditions.

[0033] (2) Output preliminary DC voltage after rectification.

[0034] 3. PFC module (power factor correction):

[0035] (1) Optimize the power factor of the power supply through the PFC circuit, reduce the impact of harmonics, and improve the power quality.

[0036] (2) Use adaptive control algorithms to adjust the input current waveform in real time to best match the load.

[0037] 4. Inverter circuit:

[0038] (1) Make necessary adjustments to the rectified DC voltage to provide a stable intermediate voltage.

[0039] (2) The output stability of the output voltage after passing through the transformer is an important factor in the quality of the control system.

[0040] 5. Voltage monitoring and control:

[0041] (1) Set up a voltage feedback circuit to monitor the voltage values of the inverter circuit and high-voltage load in real time, and feed the data back to the main control circuit.

[0042] (2) This module ensures that the system can respond promptly in abnormal situations and protect the safe operation of the equipment.

[0043] 6. LC resonance module:

[0044] (1) This module utilizes LC resonance characteristics to enhance energy transfer efficiency. The design of the resonant circuit ensures stability at high power output.

[0045] (2) The device includes current monitoring and voltage regulation links to effectively control the resonant state.

[0046] 7. Main control circuit (STM32F407):

[0047] (1) As the control center of the system, it is responsible for monitoring and controlling the entire circuit, including real-time sampling and processing of voltage and current, and generation of PWM signals.

[0048] (2) Output control signals to the drive circuit through the PWM module to adjust the output characteristics of the DC power supply.

[0049] 8. Driving circuit:

[0050] (1) Receive the PWM signal from the main control circuit and accurately control the solid-state extension to ensure the timeliness and accuracy of the pulse during its operation.

[0051] (2) The circuit can adapt to different load conditions and provide flexible pulse output parameters.

[0052] 9. Output module:

[0053] (1) The 800V DC power is output to the solid-state extension through the rectifier circuit to provide it with bias power to ensure its normal operation.

[0054] (2) The module is designed with high load and short circuit protection schemes in mind to ensure the safe operation of the equipment.

[0055] 10. Water cooling system:

[0056] (1) The chassis design integrates a water cooling plate to prevent performance degradation of modules in the chassis due to overheating.

[0057] (2) The water cooling system design needs to be equipped with a temperature sensor to monitor the temperature in real time and automatically adjust the water flow.

[0058] Example 2: Based on Example 1, a fuse is added to the output end, which will automatically disconnect when the current is greater than a preset current, thereby protecting the circuit.

[0059] Example 3, based on Example 1, incorporates a temperature relay at a strategic location within the PFC. When the temperature reaches a set point, the bimetallic strip bends, pushing or releasing the contacts, thereby switching the circuit. Typically, when the temperature exceeds the set point, the contacts open, breaking the circuit; when the temperature drops below the set point, the contacts close, completing the circuit.

[0060] Here’s how it works:

[0061] The input is a three-phase 380V power supply. Two phases (LA and LB) are randomly selected and connected to the power module. These two phases are then connected to the PFC circuit, which performs power factor correction on the incoming AC power to optimize energy efficiency. The PFC circuit converts the AC power to DC using an AC / DC rectifier. The rectified DC power is then boosted by a boost circuit to generate an intermediate voltage. The boosted DC power is then fed into an inverter circuit for DC / AC conversion. This inverter circuit monitors the input current in real time to ensure output waveform quality. The inverted AC power passes through an LC resonant circuit, which facilitates signal energy transfer. The resonant state is monitored in real time by a current monitoring module, and this data is fed back to the STM32F407 main control circuit for better output regulation. The current signal after LC resonance is fed into a transformer for boosting, which raises the voltage to 800V. The 800V AC output is converted to DC by the rectifier, and the output voltage is smoothed by a filter circuit to ensure stability. After rectification and filtering, voltage and current sampling modules are installed to collect real-time voltage and current data from the system output and feed this data back to the main control circuit for processing. The STM32F407, serving as the core control unit, processes the voltage and current data and generates corresponding PWM control signals. It also receives reverse feedback signals to control the inverter circuit and LC resonance. The system incorporates a protection circuit to monitor the overall operating status. If an anomaly is detected, the protection module immediately generates a protection signal, shutting off the output to prevent damage. The rectified and filtered 800V DC power is then output to the solid-state extension, serving as its bias power supply and ensuring stable power supply. Finally, a water cooling system was designed to maintain the appropriate operating temperature for each module during high-power operation, preventing malfunctions.

[0062] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations that come within the meaning and range of equivalents of the claims be embraced within the present invention.

[0063] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment have also been appropriately combined to form other implementation methods that are easy for those skilled in the art to understand.

Claims

1. A high-voltage DC power supply system for parallel resonant high-power loads, comprising a 380V three-phase power supply, a three-phase switch, a PFC circuit, an inverter circuit, an LC resonant circuit, a current detection module, a transformer, a rectifier and filter module, a series switch, a parallel switch, an STM32 controller, a main circuit switch control module, a voltage detection module, and a host computer control and monitoring module, characterized in that: The 380V three-phase power supply, three-phase switch, PFC circuit and inverter circuit are connected in sequence. The inverter circuit is also connected to the transformer through an LC resonant circuit. The transformer is also connected to the rectifier and filter module. The rectifier and filter module also outputs a DC 800V voltage to the high-voltage load through a series switch and a parallel switch. A current detection module is also provided between the inverter circuit and the transformer. The current detection module is connected to the STM32 controller. The PFC circuit is also connected to the STM32 controller through a voltage detection module. The STM32 controller is also respectively connected to the three-phase switch, the series switch and the parallel switch to control the action of the three switches.

2. A high voltage DC power supply system using parallel resonant high power load according to claim 1, characterized in that: The STM32 controller is also connected to a host computer control and monitoring module.

3. The high-voltage DC power supply system using parallel resonant high-power load according to claim 1, characterized in that: The model of the STM32 controller is STM32F407.

4. The high-voltage DC power supply system using parallel resonant high-power load according to claim 1, characterized in that: The STM32 controller also collects the voltage signal and current signal output by the rectifier and filter module.

5. The high-voltage DC power supply system using parallel resonant high-power load according to claim 1, characterized in that: The PFC circuit is provided with a temperature relay, which cuts off the circuit when the temperature exceeds a set value, and connects the circuit when the temperature drops below the set value.

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