The application of switching power supplies is no longer limited to industry. With the rapid development of information technology, electronic devices are increasingly used in the field of education. In particular, the popularity of network laptops (Chromebooks, laptops, etc.) in classroom teaching and daily learning has increased the demand for charging them. Traditional charging methods can no longer meet the efficiency, convenience and safety requirements of modern education. At this time, the application of switching power supplies has become the key to solving this problem. This article will explore the application of switching power supplies in school network laptop charging cabinets, including its advantages, working principles and common application cases, and demonstrate its important role in improving the management efficiency of educational equipment and ensuring charging safety.

Advantages and characteristics of switching power supplies

24v switching power supply is just one of the many types of 24vdc power supply. The reason why the application of switching power supplies in charging cabinets has attracted much attention is mainly due to its many advantages and characteristics. First of all, the efficiency of switching power supplies is relatively high. Compared with traditional linear power supplies, switching power supplies achieve efficient power conversion through the control of high-frequency switching transistors. Its energy conversion efficiency can usually reach more than 85%, or even higher. For schools that need to frequently charge a large number of network laptops, this means that power consumption can be significantly reduced, thereby saving energy costs.

Secondly, the switching power supply is small in size and light in weight. Traditional linear power supplies require large-sized transformers and heat sinks, so they are large in size and weight. The switching power supply greatly reduces the size and weight of the transformer through high-frequency transformer technology, which makes the design of the charging cabinet more compact and beautiful, and also facilitates installation and movement.

In addition, the switching power supply has high stability and safety. In an educational environment, the stable operation and safe use of equipment are crucial. The switching power supply has multiple protection functions such as overcurrent, overvoltage, and short circuit, which can effectively prevent equipment damage and safety accidents caused by abnormal current and voltage. Its voltage output is stable, which can provide a stable and reliable charging power supply for network notebooks and ensure the normal service life of the equipment.

Finally, the switching power supply is also very scalable and adaptable. Network notebooks of different brands and models may have different power requirements. The switching power supply can adapt to the needs of different devices by adjusting the output voltage and current, and has strong flexibility and adaptability. This is of great significance for schools to manage a large number of diverse network notebook devices.

Working principle of switching mode power supply（SMPS）

Understanding the working principle of switching power supply helps to better understand its application value in network notebook charging cabinets. The core working principle of the switching power supply is to convert direct current into high-frequency alternating current through the rapid switching of high-frequency switching devices, and then convert the voltage through a high-frequency transformer, and finally rectify and output stable direct current.

Specifically, the working process of the switching power supply can be roughly divided into the following steps:

Rectification and filtering: First, the input alternating current is rectified by a rectifier bridge and converted into unstable direct current. Then, the ripple in the direct current is removed by a filter circuit (usually a capacitor filter) to obtain a smoother direct current.

High-frequency switch: The rectified direct current enters the high-frequency switching circuit. The high-frequency switching circuit is usually composed of a power switching device (such as a MOSFET) and a control circuit. Driven by the control circuit, the power switching device performs rapid switching operations at a frequency of tens of kilohertz to hundreds of kilohertz to convert direct current into high-frequency pulse current.

High-frequency transformer: The high-frequency pulse current is converted into voltage through a high-frequency transformer. Since the volume and weight of the high-frequency transformer are much smaller than those of the industrial frequency transformer, the switching power supply can be small in size and light in weight.

Rectification and filtering: The alternating current converted by the high-frequency transformer passes through the rectifier bridge and the filter circuit again, and finally outputs a stable direct current. In this step, the filter circuit usually uses higher performance capacitors and inductors to ensure the stability and purity of the output voltage.

Feedback and control: The switching power supply also includes a feedback control system, which detects the output voltage and adjusts the switching frequency and duty cycle of the switching device in real time to stabilize the output voltage. This feedback control mechanism can effectively cope with input voltage fluctuations and load changes to ensure the stability of the output voltage.

This series of working processes of the switching power supply ensures its efficient, stable and reliable power conversion performance, which is suitable for various application scenarios, including network laptop charging cabinets.

Practical application of switch mode power supply in school network laptop charging cabinet

In the actual application of the school, the network laptop charging cabinet plays an important role, not only providing the function of centralized storage and management of equipment, but also ensuring the charging efficiency and safety of the equipment. The following is an example of the actual application of switching power supply in network laptop charging cabinet.

Charging cabinet upgrade project in middle school

A middle school originally used traditional chargers to charge students' network laptops, but with the increase in the number of devices and the increase in frequency of use, the traditional charging method exposed problems such as low efficiency, high energy consumption and poor safety. In order to solve these problems, the school decided to upgrade the charging cabinet and use switching power supply as a charging solution.

By introducing the switching power supply, the new charging cabinet has significantly improved the charging efficiency. The efficient energy conversion of the switching power supply greatly shortens the charging time, and students can fully charge their laptops in a shorter time. At the same time, the new charging cabinet is compact in design and occupies little space, which is convenient for flexible deployment in different places such as classrooms and libraries.

In terms of safety, the new charging cabinet effectively prevents electrical accidents such as overcurrent and overvoltage through the multiple protection functions of the switching power supply. In actual use, the school has no safety accidents such as equipment damage and fire caused by charging, which greatly improves the safety of the charging process.

Centralized charging management system of university libraries

When a university library opens its study rooms and public areas, it faces the need for a large number of students to charge their network laptops at the same time. The traditional socket charging method is not only messy, but also has safety hazards. To this end, the library introduced a centralized management charging cabinet system with switching power supply technology to meet large-scale charging needs.

The new charging management system realizes centralized management and efficient use of multiple charging devices through intelligent control and time-sharing charging technology. The application of switching power supply enables each charging port to provide stable and sufficient power, avoiding problems such as circuit tripping caused by socket overload.

In addition, the library's charging management system also realizes real-time monitoring and management of charging status through the intelligent control function of the switching power supply. Administrators can view the working status, charging current and voltage of each charging port in real time through the management platform, so as to timely discover and handle abnormal situations and ensure the smooth progress of the charging process.

Application of switched mode power supply in other educational scenarios

The application of switching power supply in school network notebook charging cabinets is not limited to ordinary classrooms and libraries. In different educational scenarios, switching power supply also shows its unique advantages and wide applicability.

Laboratory and multimedia classroom

In laboratories and multimedia classrooms, students need to frequently use network notebooks for experimental data processing, programming and multimedia production. Traditional charging methods are difficult to meet the high-frequency and high-load charging needs. The efficient energy conversion and intelligent control functions of the switching power supply can provide continuous and stable power supply for these scenarios to ensure the normal operation of the equipment.

Distance education and online learning center

With the rise of distance education and online learning, the charging needs of network notebooks have become more complex and diverse. In distance education centers and online learning centers, students need to study and interact online for a long time, which puts higher requirements on the battery life of the equipment. The efficient charging capacity of the switching power supply can charge a large number of devices in a short time, ensuring that students are not troubled by insufficient power during the learning process.

School activities and outdoor teaching

School activities and outdoor teaching are an indispensable part of the education process. In these scenarios, the portability and stability of charging equipment are particularly important. The switching power supply is small in size, light in weight, easy to carry and install, and can provide reliable power support for network notebooks in outdoor environments. In addition, the waterproof and dustproof design of the switching power supply ensures that it can work stably in various environments and ensure the smooth progress of teaching activities.

Development trend of switching power supply technology

With the continuous advancement of science and technology, switching power supply technology is also constantly developing and innovating. In the future, the application of switching power supplies in the field of education will be more extensive and in-depth, mainly reflected in the following aspects:

1. High frequency and miniaturization

With the development of electronic components and semiconductor technology, the operating frequency of the switching power supply will be further improved, thereby achieving more efficient energy conversion and smaller size. This will make the design of the charging cabinet more compact, able to accommodate more charging ports, while reducing the production and maintenance costs of the equipment.

2. Intelligence and networking

The future switching power supply will be combined with the Internet of Things (IoT) technology to achieve intelligent and networked management. Through built-in sensors and communication modules, the switching power supply can monitor the charging status, environmental parameters and equipment health in real time, and upload the data to the cloud management platform. Administrators can remotely control and manage charging equipment through mobile devices or computers to improve management efficiency and response speed.

3. Green environmental protection and sustainable development

In the context of global energy shortage and environmental protection, the green and environmental protection design of switching power supplies will become an important development direction. By adopting more efficient energy conversion technology and renewable energy (such as solar energy and wind energy) charging solutions, switching power supplies will significantly reduce energy consumption and carbon emissions, and help the sustainable development of the education field.

4. Modularity and scalability

The future switching power supply will pay more attention to modular design and scalability. Through modular design, power modules of different specifications and functions can be flexibly combined to adapt to charging scenarios of different scales and needs. At the same time, the scalable design enables the system to be flexibly adjusted and upgraded according to actual needs, extending the service life of the equipment and reducing the total cost of ownership.

Conclusion

The application of switched-mode power supply in school network laptop charging cabinet not only improves the efficiency and safety of equipment charging, but also significantly improves the convenience and intelligence level of school equipment management. Through the analysis of specific cases, we can see the important value and broad application prospects of switching power supply in modern educational equipment management. In the future, with the continuous development and innovation of switching power supply technology, its application in the field of education will be more extensive and in-depth, providing schools with more efficient, safe and intelligent charging solutions, and helping to further advance the process of educational informatization. In this process, switching power supply will continue to play its important role, promote the continuous development of educational modernization, and provide students with a better learning environment.