The high-speed deep well pump of DC brushless permanent magnet synchronous motor is the first synchronous motor product developed by our company. At present, this technology has won the invention patent of the State Intellectual Property Office, and was awarded the 2014 international pump and valve industry technology innovation by Rongge Industrial Media. prize. Subsequently, we obtained 13 utility model patents in the application of permanent magnet synchronous motors in the pump (there are several inventions and international patents in the declaration). When the entire pump industry has not applied synchronous motors, we have achieved so many patented technologies and are in the leading position in the pump industry.