(Brushless DC Motor, BLDCM) with the development of new power electronics and permanent magnet materials and matured a new motor, it belongs to the category of synchronous motors, AC motors have both advantages and reliable operation, but also has a traditional brush DC superior speed performance, so it has broad application prospects.

With the continuous improvement of people's living standards and environmental awareness, named "green" development concept of new electric vehicles will be popular all over the world, electric motorcycles will become one of humanity's major means of transport. Brushless DC motor electric motorcycle as green transport, simple operation, riding comfort, easy maintenance, less pollution and noise is low.