As a permanent magnet synchronous motor that is developed by Hiest for air pumps of NEVs based on the operation requirements of air compressor, the electric blast pump (also known as electric air compressor unit) of NEVs can provide gas source required for gas braking, gasbag lifting and pneumatic door opening/closing of electric buses and trucks. It is a core part of electric gas pump for electric bus. Featured by simple structure, small size, reliable performance, energy conservation, long life and high efficiency, optimization and simulation design, the series product can reach energy-saving efficiency for over 10% compared with the rivals, to extend the cruising ability of electric bus and increase the service life of batteries.