High frequency inverter based on nanocrystalline magnetic core and its application in photovoltaic systems

Abstract

This invention relates to the field of crystalline magnetic core inverter technology, specifically to a high-frequency inverter based on a nanocrystalline magnetic core and its application in photovoltaic systems. The high-frequency inverter includes a housing and a boost inverter module disposed within it. The nanocrystalline material possesses excellent characteristics such as high saturation magnetic induction (≥1.25T), high initial permeability (>80,000), and low iron loss (≤70W / kg at 100kHz / 300mT). The high-frequency inverter of this invention achieves efficient and low-loss conversion of DC to high-frequency AC by integrating an input boost module, a nanocrystalline magnetic core coil, and an output voltage regulator module. Its application in photovoltaic systems includes system connection, parameter preset, DC boost, core inverter, waveform voltage regulation, thermal management, and status monitoring. This invention effectively solves the problems of low efficiency, large size, poor thermal stability, and insufficient electromagnetic compatibility of traditional ferrite core inverters, significantly improving the power generation efficiency, power density, and operational reliability of photovoltaic systems.

Description

Technical Field

[0001] This invention relates to the field of crystalline magnetic core inverter technology, and more specifically, to a high-frequency inverter based on nanocrystalline magnetic cores and its application in photovoltaic systems. Background Technology

[0002] With the rapid development of photovoltaic power generation technology, increasingly stringent requirements have been placed on the efficiency, power density, reliability, and electromagnetic compatibility (EMC) of photovoltaic inverters, which are the core energy conversion equipment. High-frequency inverters, by increasing the switching frequency (typically above 20kHz) to achieve miniaturization and weight reduction of magnetic components (such as transformers and inductors), represent the current mainstream direction of technological development. However, their performance is largely limited by the magnetic materials used. Currently, traditional high-frequency inverters commonly use manganese-zinc ferrite as the core material. Although ferrite has certain advantages in low loss at high frequencies, it also has a series of inherent drawbacks: First, its low saturation magnetic flux density (approximately 0.5T) makes it prone to magnetic saturation during high-power transmission, forcing designers to use larger cores and windings with more turns, severely limiting further increases in inverter power density and miniaturization. Second, ferrite's losses remain relatively high at higher frequencies, reducing overall conversion efficiency and putting pressure on the cooling system, impacting long-term reliability. Third, ferrite materials have a low Curie temperature (approximately 200-250℃), making their magnetic properties prone to degradation and temperature stability in the wide temperature variations encountered in outdoor photovoltaic applications. Furthermore, the limited permeability of traditional materials results in large or inefficient EMI filter components, making it difficult to meet increasingly stringent EMC standards.

[0003] Therefore, existing high-frequency inverters struggle to simultaneously achieve high efficiency, high power density, high reliability, and excellent EMC performance, failing to fully meet the extreme demands of modern photovoltaic systems, especially distributed rooftop power stations and large-scale photovoltaic power plants. A novel magnetic material solution is urgently needed to overcome these technological bottlenecks. Summary of the Invention

[0004] The purpose of this invention is to provide a high-frequency inverter based on a nanocrystalline magnetic core and its application in a photovoltaic system, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides a high-frequency inverter based on a nanocrystalline magnetic core and its application in a photovoltaic system, comprising a housing, wherein a boost inverter module is fixedly disposed inside the housing, the boost inverter module includes an inverter module, the inverter module includes a nanocrystalline magnetic core component; the nanocrystalline magnetic core component includes a nanocrystalline magnetic core coil, the nanocrystalline magnetic core coil being made of iron-based nanocrystalline material.

[0006] As a further improvement to this technical solution, the boost inverter module also includes a boost module, which includes an input boost module and an output voltage regulator module. The input boost module is electrically connected to the nanocrystalline magnetic core component and is used to boost the input DC voltage. The output voltage regulator module is electrically connected to the nanocrystalline magnetic core component and is used to regulate and shape the invertered AC power.

[0007] As a further improvement to this technical solution, an input / output module is also fixedly installed inside the housing. The input / output module is electrically connected to the input terminal located at the bottom of the housing and the output terminal located at the top of the housing, respectively.

[0008] As a further improvement to this technical solution, a display screen and an adjustment knob are also provided on the outer surface of the housing. The display screen and the adjustment knob are both communicatively connected to the input / output module and / or the boost inverter module for parameter setting and operating status display.

[0009] As a further improvement to this technical solution, a heat dissipation structure is also provided on the outer surface of the housing, the heat dissipation structure including heat dissipation fins and a heat dissipation fan.

[0010] As a further improvement to this technical solution, a control connector is also provided on the outer surface of the housing. The control connector is communicatively connected to the input / output module and is used to connect to external monitoring equipment.

[0011] As a further improvement to this technical solution, the saturation magnetic induction intensity of the iron-based nanocrystalline material is not less than 1.25T, and the initial magnetic permeability is greater than 80,000.

[0012] As a further improvement to this technical solution, the iron-based nanocrystalline material has an iron loss of no more than 70 W / kg under the conditions of 100 kHz frequency and 300 mT magnetic flux density.

[0013] As a further improvement to this technical solution, the high-frequency inverter operates in a frequency range of 20kHz to 150kHz.

[0014] A high-frequency inverter based on a nanocrystalline magnetic core in a photovoltaic system includes the following steps: The S1 system connects and integrates the DC output cables generated by the photovoltaic array to the input terminals at the bottom of the inverter, while connecting the AC cables leading to the grid or load to the output terminals at the top. It can also optionally connect to a remote monitoring network via a control connector to complete the physical link from the power generation end to the power consumption end. The S2 operating parameters are preset and self-tested. Operators set output voltage, frequency, and other parameters according to local power grid standards by adjusting the knobs and confirm and monitor them through the display screen. After the system is powered on, the internal input / output modules and control units perform a comprehensive self-test to ensure that all components are in normal initial condition, laying the foundation for efficient and stable operation. The S3 DC boost converter and energy preprocessing system automatically starts the inverter when sunlight conditions are met. Photovoltaic DC power enters the boost inverter module via the input terminals. The internal input boost module first raises the voltage to an ideal level suitable for inversion, preparing for subsequent high-efficiency energy conversion. The S4 core high-frequency inverter (where the nanocrystalline magnetic core's efficiency is fully utilized) is the essence of the entire process. The boosted DC power is fed into the nanocrystalline magnetic core component, and the nanocrystalline magnetic core coil, driven by a high-frequency switching signal, completes a precise DC-to-high-frequency AC inversion. At this instant, the high saturation magnetic induction (1.25T) and extremely low high-frequency loss (as low as 70W / kg at 100kHz / 300mT) characteristics of the nanocrystalline material are fully utilized, achieving minimal energy loss conversion. The S5 output waveform purification and voltage regulation: the high-frequency AC power generated by the inverter is not in its final form. It is then finely processed by the output voltage regulation module 1103. Through filtering and voltage regulation, the waveform is shaped into a pure and stable standard power frequency sine wave, ensuring that the output power quality fully meets the grid connection or load requirements. S6 dynamic thermal management and reliability assurance ensure that despite the low heat generation of the nanocrystalline magnetic core itself, the system continues to operate with active cooling. A cooling fan guides airflow across the large heat dissipation surface formed by the heat sink fins, promptly removing excess heat generated by the boost inverter module and other power components. Combined with the high Curie temperature (560℃) and excellent thermal stability of the nanocrystalline material, this ensures the equipment's ultra-high reliability during long-term continuous operation. The S7 provides real-time status monitoring and data interaction, with the display screen continuously updating real-time operating data throughout the entire operating cycle. Simultaneously, key information such as system operating status, power generation efficiency, and fault alarms can be uploaded to the monitoring center via control connectors, enabling remote, visualized, and intelligent operation and maintenance management. S8 Comprehensive Performance Evaluation and Advantage Consolidation: After long-term operation, the system can undergo a comprehensive performance evaluation. Compared with traditional solutions, its advantages have been solidified: the extremely high conversion efficiency brought by the nanocrystalline magnetic core directly improves power generation revenue; the inherent high reliability of the materials and excellent thermal management reduce maintenance costs; and the superior EMC performance based on high magnetic permeability ensures grid-friendly operation.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. This high-frequency inverter based on nanocrystalline magnetic cores and its application in photovoltaic systems achieves iron losses as low as 70W / kg under high-frequency operating conditions (e.g., 100kHz / 300mT), far lower than that of traditional ferrite materials. This significantly reduces the energy consumption and heat generation of the magnetic components themselves during the core energy conversion process of the inverter, thereby significantly improving the overall energy conversion efficiency and directly increasing the power generation revenue of the photovoltaic system.

[0016] 2. This high-frequency inverter based on nanocrystalline magnetic cores and its application in photovoltaic systems utilizes nanocrystalline magnetic cores with a saturation magnetic induction intensity of up to 1.25T, which is 2.5 times that of traditional ferrite cores (approximately 0.5T). This characteristic allows for the use of smaller and lighter magnetic cores while transmitting the same power, significantly improving the inverter's power density. This makes the invention particularly suitable for space-constrained applications, such as rooftop distributed photovoltaics and new energy vehicle drive systems.

[0017] 3. This high-frequency inverter based on nanocrystalline magnetic core and its application in photovoltaic systems utilizes nanocrystalline materials, which possess a high Curie temperature (560℃) and excellent temperature stability. The rate of change in its magnetic properties is less than 10% over a wide temperature range of -50℃ to 150℃. This characteristic ensures that the inverter can operate stably for extended periods in harsh outdoor temperature environments without significant degradation of its magnetic properties, greatly extending the equipment's lifespan and reducing maintenance requirements.

[0018] 4. This high-frequency inverter based on nanocrystalline magnetic cores and its application in photovoltaic systems utilizes the extremely high initial permeability (>80,000) of nanocrystalline materials. This allows EMI filtering components, such as common-mode inductors made from them, to provide extremely high impedance in a very small size, thereby effectively suppressing switching noise and ensuring that the inverter easily passes stringent EMC standards. Simultaneously, its excellent soft magnetic characteristics contribute to obtaining a lower distortion and purer sinusoidal output voltage, improving power supply quality.

[0019] 5. This high-frequency inverter based on nanocrystalline magnetic core and its application in photovoltaic systems, through the cooperation of display screen, adjustment knob and control connector, realizes flexible setting of inverter operating parameters, real-time status monitoring and remote data interaction, which facilitates preventive maintenance and energy efficiency analysis, reduces operation and maintenance costs and improves the intelligence level of the system. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the process of the present invention; Figure 2 This is a schematic diagram of the shell structure in this invention; Figure 3 This is a schematic diagram of the cooling fan structure in this invention; Figure 4 This is a schematic diagram of the input / output module in this invention; Figure 5 This is a schematic diagram of the nanocrystalline magnetic core coil in this invention.

[0021] The labels in the diagram represent the following: 1. Housing; 2. Display screen; 3. Adjustment knob; 4. Output terminal; 5. Heat sink fins; 6. Cooling fan; 7. Control connector; 8. Input terminal; 9. Input / output module; 10. Boost inverter module; 11. Nanocrystalline magnetic core component; 1101. Nanocrystalline magnetic core coil; 1102. Input boost module; 1103. Output voltage regulator module. Detailed Implementation

[0022] The technical solutions in 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.

[0023] Example 1 Please see Figures 1-5 As shown, this embodiment provides a high-frequency inverter with a nanocrystalline magnetic core, including a housing 1 and a display screen 2 fixedly disposed on the outer surface of the housing 1. An adjustment knob 3 is rotatably disposed on the outer surface of the housing 1. The inverter effect of the high-frequency inverter can be adjusted through the display screen 2 and the adjustment knob 3, thereby converting the DC output voltage generated by the photovoltaic module into an AC sinusoidal voltage. In traditional high-frequency inverters, pulse width modulation (PWM) technology is used to drive the switching transistors at frequencies much higher than the power frequency. This allows the transistors to alternately turn on and off at extremely high speeds, "chopping" the smooth DC current into a series of high-frequency AC square wave pulses. This is the first crucial transformation: the conversion from DC to high-frequency AC. In progress.

[0024] However, the losses of traditional ferrite materials at 100kHz are much higher than those of iron-based nanocrystalline materials (the latter can have losses as low as 70W / kg at 100kHz / 300mT). These losses are directly converted into heat, leading to a significant increase in inverter temperature. This not only reduces the overall conversion efficiency but also places higher demands on the heat dissipation system, increasing system complexity and cost. This efficiency bottleneck limits its competitiveness in applications requiring extreme energy efficiency, such as large-scale photovoltaic power plants. Traditional ferrite cores have a low saturation magnetic flux density (typically around 0.5T), far lower than the 1.25T of iron-based nanocrystalline cores. This means that to prevent core saturation when transmitting the same power, ferrite transformers require a larger core cross-sectional area and more winding turns, making further reductions in size and weight difficult. This puts traditional inverters at a disadvantage in space-constrained applications (such as drive systems for new energy vehicles and rooftop inverters for distributed photovoltaic systems), failing to meet the growing demand for compact designs in modern power electronic equipment.

[0025] Due to the limitations of the materials mentioned above, the use of more advanced iron-based nanocrystalline materials can enable more stable operation during the inverter processing of DC power generated by photovoltaic modules. Therefore, an output terminal 4 is fixedly installed on the top of the housing 1, an input terminal 8 is fixedly installed on the bottom of the housing 1, and an input / output module 9 and a boost inverter module 10 are fixedly installed inside the housing 1. The input / output module 9 is used to electrically connect with the input terminal 8 and the output terminal 4. The input terminal 8 and the output terminal 4 are fixedly connected to the top and bottom of the housing 1, respectively. The input terminal 8 and the output terminal 4 include multiple sets of push-conductive elements, and the inverter is electrically connected to the external circuit through the input terminal 8 and the output terminal 4. Since the voltage generated by the photovoltaic module is low, a boost inverter module 10 also needs to be integrated in the inverter housing 1. The boost inverter module 10 includes a boost module and an inverter module, wherein the inverter module includes a nanocrystalline magnetic core component 11. Furthermore, the nanocrystalline magnetic core component 11 includes a nanocrystalline magnetic core coil 1101, and the boost module includes an input boost module 1102 and an output voltage regulator module 1103; The nanocrystalline magnetic core coil 1101 can achieve the effect of inverter processing of DC photovoltaic power.

[0026] When a high-frequency alternating current is applied to the nanocrystalline magnetic core coil 1101, a high-frequency alternating magnetic field is generated inside the core. Due to the presence of nanocrystals, the resistance (i.e., coercivity) experienced by the domain walls in moving and rotating under the alternating magnetic field is extremely low. This means that the magnetization and demagnetization processes are very rapid and easy, with extremely low energy loss. Simultaneously, the large number of nanocrystals and their interfaces effectively suppress the generation of eddy currents, further reducing losses at high frequencies. This is the fundamental reason why it can operate efficiently in the inverter boost module 1102 and the inverter module. Its high saturation magnetic induction intensity (up to 1.25T) means that the core can withstand a larger magnetic flux per unit cross-sectional area without saturation, providing a solid foundation for the inverter to handle high power. Traditional ferrite materials exhibit significantly higher losses at 100kHz than iron-based nanocrystalline materials (the latter can achieve losses as low as 70W / kg at 100kHz / 300mT). The extremely low iron losses and coercivity of nanocrystalline magnetic cores mean that the heat generated by magnetization and eddy currents in the magnetic components themselves is greatly reduced during the DC-AC conversion process in the inverter. This not only directly improves the overall energy conversion efficiency, but more importantly, the lower temperature rise reduces the stringent requirements on the heat dissipation system (such as heat sink fins 5 and cooling fan 6), thus improving the long-term operational stability and reliability of the system.

[0027] Secondly, nanocrystalline magnetic cores bring about a significant increase in inverter power density, enabling miniaturization and weight reduction of the equipment. Traditional ferrite cores have low saturation magnetic induction (typically only 0.5T), about 40% of that of nanocrystalline cores. This means that to transmit the same power, ferrite transformers require a larger core cross-sectional area and more winding turns to prevent core saturation. Nanocrystalline cores, with their high saturation magnetic induction, allow the core to operate safely at higher magnetic flux densities, thus achieving the same power handling capacity in a smaller volume. This allows high-frequency inverters, as described in Example 1, to better adapt to space-constrained applications, such as rooftop inverters for distributed photovoltaic systems or drive systems for new energy vehicles, meeting the urgent need for compact designs in modern power electronic equipment.

[0028] Nanocrystalline materials possess extremely high initial permeability (>80,000), enabling EMI filtering components such as common-mode inductors made from them to provide extremely high impedance in a very small size. This effectively suppresses high-frequency common-mode noise generated by high-speed switching of transistors. This ensures that the inverter generates extremely low electromagnetic interference and can successfully pass stringent industry EMC standard tests. Simultaneously, its excellent soft magnetic properties contribute to obtaining a purer, lower-distortion output sinusoidal voltage. Nanocrystalline materials possess a high Curie temperature (560℃) and excellent temperature stability, exhibiting a magnetic property change rate of less than 10% over a wide temperature range of -50℃ to 150℃. This characteristic is crucial for photovoltaic inverters that require long-term stable operation in harsh outdoor temperature environments, ensuring that the inverter's magnetic properties do not significantly degrade due to ambient temperature fluctuations, thereby extending the equipment's lifespan.

[0029] First, correctly connect the DC output cable generated by the photovoltaic modules to the input terminal 8 at the bottom of the inverter. Simultaneously, connect the AC cable leading to the grid or load to the output terminal 4 at the top of the inverter. If needed, an external monitoring system can also be connected via control connector 7 to prepare for remote control and data communication. After completing the physical connection, the user can set the operating parameters (such as output voltage, frequency, etc.) through the adjustment knob 3 on the front of the inverter, and observe key information such as input voltage, output power, current frequency, and device status in real time through the display screen 2. After setting, the user starts the inverter, and its internal core workflow begins. DC power enters the inverter through the input terminal 8, is first managed by the input / output module 9, and the power is guided to the core boost inverter module 10; The core stage of energy conversion is completed in the boost inverter module 10. This module first boosts the relatively low DC voltage generated by the photovoltaic module to a suitable level through its input boost module 1102. Then, the most critical step is the inversion operation performed by the nanocrystalline magnetic core component 11.

[0030] Specifically, the nanocrystalline magnetic core coil 1101, under the control of a high-frequency switching signal, inverts the boosted direct current into high-frequency alternating current. During this process, the superior characteristics of the nanocrystalline material—high saturation magnetic induction, high permeability, and low loss—are fully utilized, resulting in extremely high energy conversion efficiency and generating significantly less heat than traditional solutions. The inverted alternating current is then finely adjusted by the output voltage regulator module 1103 to ensure a stable and pure output waveform that meets grid connection or load requirements.

[0031] Throughout the energy conversion process, the inverter's thermal management system operates synchronously and efficiently. Due to the low-loss characteristics of the nanocrystalline magnetic core, the heat generated from the boost inverter module 10 is relatively small. The heat sink fins 5 provide a large heat dissipation surface area, while the cooling fan 6 actively guides airflow to quickly remove excess heat generated inside the casing (especially around the magnetic components and power switching transistors), ensuring that all components (including the core nanocrystalline magnetic core coil 1101) always operate at a safe temperature, guaranteeing the long-term reliability of the equipment. Finally, the pure AC power, after precise conversion and voltage regulation, is output through the output terminal 4 to supply the load or feed into the grid. Simultaneously, the operating status of the entire system, including voltage, current, power, and any fault information, is continuously updated on the display screen 2, providing users with an intuitive monitoring interface. Advantages of using nanocrystalline materials in inverters compared to traditional ferrite materials: 1. A qualitative leap has been achieved in the crucial energy conversion efficiency, which is the most direct and significant advantage of nanocrystalline materials. Traditional ferrite materials have high core losses (iron losses) at high frequencies (such as 100kHz). These losses are directly converted into heat, leading to increased inverter temperature rise. This not only lowers the overall conversion efficiency but also places stringent demands on the heat dissipation system, increasing system complexity and cost. As the document states, iron-based nanocrystalline materials can achieve losses as low as 70W / kg under the same conditions (100kHz / 300mT), far lower than ferrite. This extremely low core loss means that the heat generated by the magnetic material itself is greatly reduced during high-frequency "chopping" and energy conversion in the inverter, thus significantly improving the overall energy conversion efficiency. This is a crucial breakthrough for large-scale photovoltaic power plants that pursue ultimate energy efficiency.

[0032] 2. Nanocrystalline cores offer overwhelming advantages in power density and miniaturization. Traditional ferrite cores have low saturation magnetic induction (approximately 0.5T), which is a major bottleneck for inverter miniaturization. To prevent core saturation during high power transmission, designers must use cores with larger cross-sectional areas and more winding turns, making it difficult to reduce transformer size and weight. In contrast, nanocrystalline cores boast a saturation magnetic induction of up to 1.25T, 2.5 times that of ferrite. This means that, while transmitting the same power, nanocrystalline cores can operate safely and stably within a smaller volume, significantly increasing the inverter's power density (power per unit volume). This advantage perfectly aligns with the urgent need for compact and lightweight designs in modern power electronic devices, such as distributed rooftop photovoltaic inverters and electric drive systems for new energy vehicles.

[0033] 3. Superior temperature stability and long-term reliability: Nanocrystalline materials possess a high Curie temperature (up to 560℃) and excellent temperature stability. Their magnetic properties exhibit very low variation (<10%) over a wide temperature range of -50℃ to 150℃. This characteristic is crucial for photovoltaic inverters that require long-term stable operation in harsh outdoor temperature environments. It ensures that the performance of the inverter's core magnetic components does not significantly degrade due to drastic temperature fluctuations, thus guaranteeing long-term operational stability and a longer service life. In contrast, traditional ferrite materials have relatively poor temperature characteristics, with more pronounced performance degradation at high temperatures.

[0034] 4. It offers superior electromagnetic compatibility (EMC) and output waveform quality. Nanocrystalline materials possess extremely high initial permeability (typically >80,000), enabling EMI filtering components such as common-mode inductors made from them to provide extremely high impedance in a very small size. This effectively suppresses high-frequency common-mode noise generated by the high-speed switching of the switching transistors. This ensures extremely low electromagnetic interference generated by the inverter, making it easier to pass stringent EMC standard tests. Simultaneously, its excellent soft magnetic characteristics contribute to obtaining a purer, lower-distortion output sinusoidal voltage, improving power supply quality.

[0035] Example 2 Please see Figures 1-5 As shown, this embodiment provides a photovoltaic system based on a nanocrystalline magnetic core and a high-frequency inverter, including the following steps: The S1 system connects and integrates the DC output cable generated by the photovoltaic array to the input terminal 8 at the bottom of the inverter, and connects the AC cable leading to the grid or load to the output terminal 4 at the top. It can also be connected to a remote monitoring network via the control connector 7 to complete the physical link from the power generation end to the power consumption end. The S2 operating parameters are preset and self-checked. Operators set output voltage, frequency, and other parameters according to local power grid standards by adjusting knob 3, and confirm and monitor them through display screen 2. After the system is powered on, the internal input / output modules 9 and control units perform a comprehensive self-check to ensure that all components are in normal initial condition, laying the foundation for efficient and stable operation. S3 DC boost and energy preprocessing: When the sunlight conditions are met, the inverter automatically starts. Photovoltaic DC power enters the boost inverter module 10 through input terminal 8. Its internal input boost module 1102 first boosts the voltage to an ideal level suitable for inversion, which prepares for subsequent high-efficiency energy conversion. The S4 core high-frequency inverter (where the nanocrystalline magnetic core's efficiency is fully utilized) is the essence of the entire process. The boosted DC power is fed into the nanocrystalline magnetic core component 11, and the nanocrystalline magnetic core coil 1101, driven by a high-frequency switching signal, completes a precise DC-to-high-frequency AC inversion. At this instant, the high saturation magnetic induction (1.25T) and extremely low high-frequency loss (as low as 70W / kg at 100kHz / 300mT) characteristics of the nanocrystalline material are fully utilized, achieving minimal energy loss conversion. S5 Output Waveform Purification and Stabilization. The high-frequency AC power generated by the inverter is not in its final form. It is then finely processed by the output voltage regulator module 1103. Through filtering and voltage regulation, the waveform is shaped into a pure and stable standard power frequency sine wave, ensuring that the output power quality fully meets the grid connection or load requirements. S6 dynamic thermal management and reliability assurance ensure that despite the low heat generation of the nanocrystalline magnetic core itself, the system continues to operate with active cooling. The cooling fan 6 guides airflow across the large heat dissipation surface formed by the heat sink fins 5, promptly removing excess heat generated by the boost inverter module 10 and other power components. Combined with the high Curie temperature (560℃) and excellent thermal stability of the nanocrystalline material, this ensures the equipment's ultra-high reliability during long-term continuous operation. The S7 provides real-time status monitoring and data interaction. Throughout the entire operating cycle, display screen 2 continuously updates and displays real-time operating data. Simultaneously, through control connector 7, key information such as system operating status, power generation efficiency, and fault alarms can be uploaded to the monitoring center, enabling remote, visualized, and intelligent operation and maintenance management. S8 Comprehensive Performance Evaluation and Advantage Consolidation: After long-term operation, the system can undergo a comprehensive performance evaluation. Compared with traditional solutions, its advantages have been solidified: the extremely high conversion efficiency brought by the nanocrystalline magnetic core directly improves power generation revenue; the inherent high reliability of the materials and excellent thermal management reduce maintenance costs; and the superior EMC performance based on high magnetic permeability ensures grid-friendly operation.

[0036] The direct current (DC) generated by the photovoltaic array is connected to the system through input terminal 8 and managed by input / output module 9. At this time, the user can set and monitor operating parameters by adjusting knob 3 and display screen 2. The system completes self-testing, laying the foundation for efficient operation. Subsequently, the process enters the core energy form conversion stage. The DC power is first boosted by input boost module 1102 within boost inverter module 10. Then, the most crucial step arrives: electrical energy is delivered to nanocrystalline magnetic core component 11. Under the drive of a high-frequency switching signal, nanocrystalline magnetic core coil 1101 inverts the DC power into high-frequency alternating current. In this core stage, the unique working principle of nanocrystalline materials is fully utilized: its internal nanocrystalline structure results in extremely low resistance to magnetic domain wall movement (low coercivity), rapid magnetization and demagnetization processes with extremely low energy consumption; simultaneously, the nanoscale structure effectively suppresses eddy current effects, jointly achieving extremely low high-frequency iron loss. Its high saturation magnetic induction intensity (1.25T) ensures that the magnetic core is not easily saturated during high-power transmission. The current after inversion is purified and regulated by the output voltage regulator module 1103, outputting a pure sine wave. Throughout the energy conversion process, the dynamic thermal management system S6 operates synchronously, with the cooling fan 6 and heat sink 5 working together to dissipate heat. The inherent low-loss characteristics of the nanocrystalline material reduce heat generation at the source, while its high Curie temperature (560℃) and excellent temperature stability form the cornerstone of reliability. Finally, through real-time monitoring and data interaction, the system status is fully understood, ultimately achieving comprehensive performance evaluation and solidifying its advantages. In terms of economic benefits, the extremely high conversion efficiency of nanocrystalline magnetic cores (thanks to their low-loss characteristics, such as losses as low as 70W / kg at 100kHz / 300mT) directly translates into higher power output, improving the overall lifecycle benefits of photovoltaic systems. Secondly, at the equipment and system level, miniaturization and high power density are achieved. The high saturation magnetic induction of nanocrystalline materials allows magnetic components to transmit the same power in a smaller volume, making the inverter itself more compact and easier to deploy in space-constrained scenarios such as rooftops, while also reducing material and transportation costs. Thirdly, the reliability and stability of the system have achieved a qualitative leap. This is not only due to the excellent thermal stability of nanocrystalline materials (performance change rate <10% from -50℃ to 150℃), ensuring stable performance under harsh outdoor temperature differences, but also thanks to their superior electromagnetic compatibility (EMC). High initial permeability (>80,000) allows common-mode inductors to effectively suppress noise, ensuring grid-friendliness and reducing interference to the power grid. Finally, at the operation and maintenance level, higher initial reliability and intelligent monitoring reduce reliance on manual inspections and maintenance frequency, effectively controlling operating costs.

[0037] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-frequency inverter with a nanocrystalline magnetic core, comprising a housing (1), characterized in that: The housing (1) is fixedly provided with a boost inverter module (10), the boost inverter module (10) includes an inverter module, the inverter module includes a nanocrystalline magnetic core component (11); the nanocrystalline magnetic core component (11) includes a nanocrystalline magnetic core coil (1101), the nanocrystalline magnetic core coil (1101) is made of iron-based nanocrystalline material.

2. The high-frequency inverter with a nanocrystalline magnetic core according to claim 1, characterized in that: The boost inverter module (10) further includes a boost module, which includes an input boost module (1102) and an output voltage regulator module (1103). The input boost module (1102) is electrically connected to the nanocrystalline magnetic core component (11) and is used to boost the input DC voltage. The output voltage regulator module (1103) is electrically connected to the nanocrystalline magnetic core component (11) and is used to regulate and shape the AC power after inversion.

3. The high-frequency inverter with a nanocrystalline magnetic core according to claim 2, characterized in that: An input / output module (9) is also fixedly installed inside the housing (1). The input / output module (9) is electrically connected to the input terminal (8) at the bottom of the housing (1) and the output terminal (4) at the top of the housing (1).

4. The high-frequency inverter with a nanocrystalline magnetic core according to claim 3, characterized in that: The outer surface of the housing (1) is also provided with a display screen (2) and an adjustment knob (3). The display screen (2) and the adjustment knob (3) are both connected to the input / output module (9) and / or the boost inverter module (10) for parameter setting and operation status display.

5. The high-frequency inverter with a nanocrystalline magnetic core according to claim 4, characterized in that: The outer surface of the housing (1) is also provided with a heat dissipation structure, which includes heat dissipation fins (5) and a heat dissipation fan (6).

6. The high-frequency inverter with a nanocrystalline magnetic core according to claim 5, characterized in that: The outer surface of the housing (1) is also provided with a control connector (7), which is communicatively connected to the input / output module (9) and used to connect to external monitoring equipment.

7. The high-frequency inverter with a nanocrystalline magnetic core according to claim 6, characterized in that: The saturation magnetic induction intensity of the iron-based nanocrystalline material is not less than 1.25T, and the initial magnetic permeability is greater than 80,000.

8. The high-frequency inverter with a nanocrystalline magnetic core according to claim 7, characterized in that: The iron-based nanocrystalline material has an iron loss of no more than 70 W / kg under the conditions of 100 kHz frequency and 300 mT magnetic flux density.

9. The high-frequency inverter with a nanocrystalline magnetic core according to claim 8, characterized in that: The high-frequency inverter operates in the frequency range of 20kHz to 150kHz.

10. A high-frequency inverter based on a nanocrystalline magnetic core in a photovoltaic system, applied according to claims 1-9 above, characterized in that: Includes the following steps: The S1 system connects and integrates the DC output cable generated by the photovoltaic array to the input terminal (8) at the bottom of the inverter, and connects the AC cable to the grid or load to the output terminal (4) at the top. It can also be connected to the remote monitoring network via the control connector (7) to complete the physical link from the power generation end to the power consumption end. S2 operating parameters are preset and self-checked. The operator sets the output voltage, frequency and other parameters according to the local power grid standard by adjusting the knob (3), and confirms and monitors them through the display screen (2). After the system is powered on, the internal input and output modules (9) and control unit perform a full self-check to ensure that the initial state of each component is normal, laying the foundation for efficient and stable operation; S3 DC boost and energy preprocessing: When the light conditions are met, the inverter starts automatically. Photovoltaic DC power enters the boost inverter module (10) through the input terminal (8). Its internal input boost module (1102) first boosts the voltage to the ideal level suitable for inversion. This step prepares for the subsequent high-efficiency energy conversion. In the core high-frequency inverter stage of S4, the efficiency of the nanocrystalline magnetic core is fully utilized, which is the essence of the entire process. The boosted DC power is sent to the nanocrystalline magnetic core component (11), and the nanocrystalline magnetic core coil (1101) completes the precise inversion from DC to high-frequency AC under the drive of the high-frequency switching signal. At this moment, the characteristics of the nanocrystalline material, such as high saturation magnetic induction (1.25T) and extremely low high-frequency loss (as low as 70W / kg at 100kHz / 300mT), are brought into full play, realizing the conversion of energy with minimal loss. S5 Output Waveform Purification and Stabilization. The high-frequency AC power generated by the inverter is not in its final form. It is then finely processed by the output voltage regulator module (1103). Through filtering and voltage regulation, the waveform is shaped into a pure and stable standard power frequency sine wave, ensuring that the output power quality fully meets the grid connection or load requirements. S6 dynamic thermal management and reliability assurance ensure that, despite the low heat generation of the nanocrystalline magnetic core itself, the system continues to operate with active heat dissipation. The cooling fan (6) guides airflow across the large heat dissipation surface formed by the heat dissipation fins (5), promptly removing the residual heat generated by the boost inverter module (10) and other power components. Combined with the high Curie temperature (560℃) and excellent thermal stability of the nanocrystalline material, the system ensures ultra-high reliability during long-term continuous operation. S7 real-time status monitoring and data interaction: throughout the entire operating cycle, the display screen (2) continuously updates and displays real-time operating data. At the same time, through the control connector (7), key information such as system operating status, power generation efficiency, and fault alarms can be uploaded to the monitoring center to realize remote, visualized intelligent operation and maintenance management; S8 Comprehensive Performance Evaluation and Advantage Consolidation: After long-term operation, the system can be evaluated for comprehensive performance. Compared to traditional solutions, its advantages are solidified: the extremely high conversion efficiency brought by the nanocrystalline magnetic core directly improves power generation revenue; the inherent high reliability and excellent thermal management of the material reduce maintenance costs; and the superior EMC performance achieved based on the high magnetic permeability ensures grid-friendly operation.

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