With the development of technology, various industries have increasingly high requirements for power continuity and power quality. The market demand for flywheel UPS has grown significantly. Compared to traditional chemical battery UPS, flywheel UPS technology has gained a foothold in Europe and America due to its environmental friendliness and long lifespan. The domestic market is also accelerating the replacement process. The flywheel UPS host adopts online double conversion technology, and the overall equipment is installed in cabinet form. The full power discharge time can reach 30 seconds (minutes-level products can be optimized through parallel operation). The application areas mainly include data centers, semiconductors, medical services, industrial production, telecommunications, large gatherings, important events, outdoor power protection, etc.