From the basic application principle, UPS is a power protection device that contains energy storage devices, with inverters as the main components, and stabilizes voltage and frequency output. It mainly consists of several parts, including rectifier, battery, inverter, and static switch.

 1. Rectifier: A rectifier is a rectifier device that converts alternating current (AC) into direct current (DC). It has two main functions: first, to convert alternating current (AC) into direct current (DC), which is filtered and supplied to the load, or to the inverter; Secondly, provide charging voltage to the battery. Therefore, it also serves as a charger;

 2. Battery: A battery is a device used by UPS to store electrical energy. It is composed of several batteries connected in series, and its capacity determines the duration of discharge (power supply). Its main function is to convert electrical energy into chemical energy and store it inside the battery when the mains power is normal. When there is a mains power failure, convert chemical energy into electrical energy and provide it to the inverter or load;

 3. Inverter: Simply put, an inverter is a device that converts direct current (DC) into alternating current (AC). It consists of an inverter bridge, control logic, and filtering circuit;

 4. Static switch: Static switch, also known as static switch, is a contactless switch that is an AC switch composed of two thyristor (SCR) in reverse parallel. Its closing and opening are controlled by a logic controller. It is divided into two types: conversion type and parallel type. The conversion switch is mainly used in systems powered by two power sources, and its function is to achieve automatic switching from one circuit to the other; The parallel type switch is mainly used for parallel inverters and utility inverters or multiple inverters.