This series of motors has the characteristics of beautiful appearance design, strong reliability, small size, low vibration, low noise, and energy saving. The outdoor (W), humid tropical (H), outdoor humid tropical (WTH), and anti-corrosion types (F1F2, WF1, WF2) derived from YB2 can also be derived from the YB2-H series explosion-proof three-phase asynchronous motors for marine use, with their performance indicators. The installation and external dimensions are the same as the basic series.