The inverter converts DC power (batteries, storage batteries) into current (typically 220V, 50Hz sine wave). It consists of an inverter bridge, control logic, and filter circuits. Widely used in air conditioners, home theaters, electric grinding wheels, electric tools, sewing machines, DVDs, VCDs, computers, televisions, washing machines, range hoods, refrigerators, video recorders, massagers, fans, lighting, etc. In foreign countries, due to the high popularity of automobiles, when working or traveling, inverters can be used to connect batteries to drive electrical appliances and various tools to work. The vehicle inverter output through the cigarette lighter is in the power specifications of 20W, 40W, 80W, 120W to 150W. A higher power inverter power supply needs to be connected to the battery through a connecting wire. Connecting a household appliance to the output of a power converter allows various appliances to be used in a car. The available electrical appliances include: mobile phones, laptops, digital cameras, cameras, lighting lamps, electric razors, CD players, game consoles, handheld computers, electric tools, car refrigerators, and various travel, camping, medical emergency appliances.
The inverter is the brain and heart of a photovoltaic power generation system. In the process of solar photovoltaic power generation, the electrical energy generated by photovoltaic arrays is DC power, but many loads require AC power. DC power supply systems have significant limitations, such as inconvenient voltage conversion, and limited load application. Except for special electrical loads, inverters are required to convert DC power to AC power. Photovoltaic inverters are the heart of solar photovoltaic power generation systems, which convert DC power generated by photovoltaic modules into AC power and transmit it to local loads or power grids. They are power electronic devices with related protection functions. Photovoltaic inverters are mainly composed of power modules, control circuit boards, circuit breakers, filters, reactors, transformers, contactors, and cabinets. The production process includes electronic parts pre processing, complete machine assembly, testing, and complete machine packaging. Its development depends on the development of power electronics technology, semiconductor device technology, and modern control technology.