Abstract： Permanent magnet synchronous motors play an important role in industrial automation，

automotive，aerospace，household appliances，and other fields due to their high efficiency，high power density，

good torque performance，and ease of control. However，in the field of electrical transmission，it is not only

necessary to accurately control its operating status，but also to have complex industrial communication and humanmachine interfaces. Traditional electrical drives mostly use proportional integral components for speed control，which may lead to integrator saturation issues，resulting in slower integration response after disturbance disappears.Complex industrial communication and human-machine interfaces require a large amount of chip resources and chip IO，resulting in high control costs. By improving the traditional proportional integrator and introducing output feedforward control，the response delay caused by integrator saturation was solved. By improving the external communication protocol and external human-machine interface hardware circuit，it solved the problem of resource and IO occupation that traditional transmission system design can only solve by increasing the number of chips.The improved system can complete all functions on a single chip 280039C DSP. Due to the absence of inter chip communication，the communication speed and response speed is greatly improved，and the on-site use is good.

      Key words：C2000 serise DSP ；vector control ；loop control