| 摘要 |
PURPOSE:To stop without contact by providing a main pole on which a single-phase AC coil is wound and an auxiliary pole magnetically coupled with the main pole, and operating a magnetic force generated by an eddy current generated on a conductor plate moving toward the poles and a magnetic force of the pole. CONSTITUTION:Steel plates having grooves 3 are laminated to form a core 1. Coils 6 are wound on narrow-width portions of both sides of the grooves 3 to form main poles 4, a wide-width portions are magnetically coupled with the poles 4 to form auxiliary poles 5 to generate an alternating magnetic path F as designated by a broken line in the drawings. When a platelike conductor 2 is inserted into an air gap 8, an eddy current is generated on the plate 2, and the plate 2 is attracted in a direction A by the magnetic force generated by the eddy current and the magnetic force of the poles 5. When the end of the plate 2 approaches an air gap 7, the magnetic force of the end of the plate 2 approaches an air gap 7, the magnetic force of the poles 4 acts the magnetic force generated by the eddy current on the plate 2 to repel the plate 2 in the direction A'. The plate 2 is stopped without contact at the position balanced with the forces inthe directions A and A'. Thus, it is stopped without the heat by the friction nor metal powder. This is adapted for a linear motor. |
