Permanent magnet synchronous motor based on natural air cooling, has mature radial magnetic field design, and motor power density is higher. The permanent magnet material of high performance grade and standard guarantee working reliably in a higher temperature environment. The high quality of material, and the higher coil space factor make the motor output more torque. The unitary modular position sensor can make the motor more anti-interference and more accurate and reliable control. With the series design of 8kw motor, it makes the production process and supply match more consistent, and the system quality guarantee is more reliable.