A ball AC fan is an AC fan supported by ball bearings, driven by alternating current and commutated by brushes and commutator to obtain DC electromotive force. Compared with traditional AC fans, ball AC fans have better cooling performance and lower energy consumption. Specifically, the structural design of the ball AC fan and the use of ball bearing supports enable it to maintain stability during high-speed rotation, while also effectively reducing vibration and noise. Therefore, ball AC fans have good application prospects in environments that require high-speed operation, such as servers and computer mainframes and other equipment. In addition, ball AC fans have a longer lifespan because their rolling parts last much longer than traditional sliding parts. Although they are relatively expensive, their high efficiency, low noise and long life make them cost-effective in applications where high performance cooling is required.