Electromagnetic actuator

An electromagnetic actuator comprising:

• a driven member installed free of sway centering a supporting point,
• a first electromagnetic driving element installed at one end of said driven member to the supporting point for driving said driven member, and
• a second electromagnetic driving element installed at the other end of said driven member to the supporting point for driving said driven member,
• said first electromagnetic driving element and said second electromagnetic driving element respectively includes a movable component fixed to said driven member and a fixed component opposing to its corresponding movable component,
• each movable component has a movable magnet with the first magnetic pole of the first magnetic polarity and the second magnetic pole of the second magnetic polarity,
• each fixed component has a fixed magnet with the first magnetic pole of the first magnetic polarity and the second magnetic pole of the second magnetic polarity installed wherein the first magnetic pole of said fixed magnet opposes to the first magnetic pole of its corresponding movable magnet so as to give an electromagnetic repulsive force to its corresponding movable magnet, and
• each fixed component also has a control coil for generating an electromagnetic controlling force according to an exciting current, said each control coil is installed between the first magnetic pole of said fixed magnet and the first magnetic pole of its corresponding movable magnet,
• wherein each movable magnet of said first and second electromagnetic elements is controlled by a totalized electromagnetic force of said electromagnetic repulsive force and said electromagnetic controlling force.