Features: 6-level three-phase motor drive, large starting torque, stable operation; Multi-pole permanent magnet rotor, large flow, low noise; Single-chip computer control, with current, voltage abnormal protection, over temperature and Stall protection function; Automatic speed control adaptive DC frequency conversion technology, high efficiency and energy saving; Both fresh water and sea water are suitable for amphibious use. The motor is completely sealed, no copper element is exposed; Wear-resistant ceramic shaft and bushing are used, corrosion resistance and long service life.