| 摘要 |
This invention first presents winding methods to make multiple printed coils on a thin multi-layered PCB. Multiple thin magnets can be laterally installed on a thin magnet board, too. Then, this invention presents variant but similar conceptual models of thin linear, rotary, and step motors and electromagnetic driver using such thin coil PCBs and magnet boards or just coil PCBs as the stators and the actuator. All models share similar innovation. Each printed coil or magnet of the actuator has the same polarity with the printed coils or magnets of the stators at its leading edge and/or has the opposite polarity with the printed coils or magnets of the stators at its tailing edge in the moving direction. So that each printed coil or magnet of the actuator is pulled by the printed coils or magnets of the stators at its leading edge and/or pushed by the printed coils or magnets of the stators at its tailing edge. The electromagnetic force that the actuator moves receives is the summation of the force that all printed coils or magnets of the actuator receive. As the result, the actuator moves in the desired direction. The electromagnetic polarities of the printed coils of the actuator or the stators may need to be changed during the operation to assure that this happens. Then the motor can be a step motor by counting the number of times that some printed coils change the electromagnetic polarities. The motors and the electromagnetic drivers are so thin that the apparatus using them can be comfortably carried under the user's clothes or attached to the user's skin.
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