Since the emergence of electronic devices, especially computers, the issue of continuous power supply has always been a concern for people. Regarding some important equipment in special directions, people not only care about the stability of their power supply, but also pay more attention to the quality of the power supply, that is, the integrity and uninterrupted nature of the power supply. Once the power supply of these devices becomes unstable or disappears, it will result in significant loss, even irreversible loss. Fortunately, the introduction of uninterruptible power supply (UPS) provides a broad vision for addressing this issue The rectifier circuit is responsible for converting AC-DC current and requires the installation of a filtering circuit to achieve stable output. It is understood that the inverter circuit is responsible for converting DC-AC current and requires the installation of a PWM pulse width modulation circuit to achieve stable output. By adding an inverter circuit and a filtering circuit, a current of DC12V-AC220V can be achieved, which can drive household appliances (AC220V) through the current conversion of the vehicle power supply (DC12V). It has strong practicality. Installing a battery in the rectifier circuit can complete the charging process of the battery, and through the operation of a single-chip machine, it can discharge the entire circuit during power outage and complete the power outage continuation process.
In the understanding of electronic components required in circuits, understanding the operating principles and characteristics of different components, and being able to observe the operating characteristic curves, laid a theoretical and practical foundation for future operations. In component soldering, proficient in the use of welding, and in drawing circuit schematics, learned the use of software PROTEL. Together, we learned how to convert schematics into PCB wiring diagrams, adjust wiring diagrams together, reduce the presence of flying wires, and make layouts more reasonable and beautiful. The combination of theory and practice, the integration of ordinary theoretical accumulation in practical application, deepens the understanding of ordinary theories, and also gives practical value to theoretical knowledge. In fact, theoretical knowledge that seems elusive and far away from us is actually around us. However, it is necessary to connect it in the preface and apply it to daily life. Electrical engineering is actually a discipline that is relatively close to daily life, from mobile phone charging to lighting up the international community. Electronics are constantly active in daily life, which is the basic discipline of society and the cutting-edge discipline of development. In this golden age of electrical research and development, rapid and continuous development has brought tremendous changes to industry and society that are indescribable and unimaginable. As a method of energy supply, the multiple advantages of electricity mean that its usefulness is almost unlimited.