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.