Linear motor and transport system using the same

A linear motor, comprising:

• a primary member including a plurality of armature modules, each armature module including a magnet core including two or more protruding portions and a coil which is wound around the magnet core and through which a current of a single phase flows;
• and
• a secondary member including at least one magnet module, the magnet module including a plurality of magnets poles of which are alternated in a moving direction and being arranged between two neighboring protruding portions,
• wherein power having a predetermined phase difference is supplied to the coil of each armature module such that a thrust according to a traveling magnet field is generated by using as one unit a P number of permanent magnets that are a multiple of 2 and the armature modules arranged in a section corresponding to a first length in which the P number of permanent magnets are aligned in the moving direction,
• wherein the primary member is fixed and a movable member composed of the secondary member moves by the generated thrust, and
• wherein, along the moving direction, a first interval between first armature modules disposed in a first section is different from a second interval between second armature modules disposed in a second section after the first section.