The YBF series high-efficiency fan uses a high-voltage explosion-proof three-phase asynchronous motor, which has the characteristics of reasonable structure, reliable performance, high process level, low noise, high efficiency, and long service life. It is suitable for driving equipment such as fans, water pumps, compressors, etc. in places where explosive gas mixtures exist. This series of motors is suitable for high-voltage explosion-proof three-phase asynchronous motors used in high-efficiency fans with a power range of 185kW~140OkW, synchronous speed of 500~1000r/min, and machine base size of 560~710. Can be used as a matching motor for coal mine shafts and mine fans. The explosion-proof mark is ExdI Mb.