In addition to the same winding direction and number of turns, the rated power of the motor should be considered to calculate the reasonable winding number and copper wire specification. The winding direction can be changed and adjusted according to the direction of current and movement.

Permanent magnet DC motor is a DC motor which uses permanent magnets to establish magnetic field. Permanent magnet DC motors are widely used in various portable electronic devices or appliances, such as tape recorders, VCD players, record players, electric massagers and various toys, as well as automobiles, motorcycles, electric bicycles, battery cars, ships, aviation, machinery and other industries. They are also widely used in some high-tech products, such as video recorders, photocopiers, cameras, mobile phones, precision machine tools, bank money counters, money binding machines and so on.