| 摘要 |
PURPOSE: An apparatus for calibrating the location of an object is provided to stably transfer an object by including electromagnets which form a magnetic path to be overlap to or be separated from a magnetic force from a permanent magnet. CONSTITUTION: An object has a ring shape. A support unit supports the object to be transferable. A rod type core(12) is installed to the inside of the object and is fixed by a fixing unit. An air gap is formed between the core and the inner wall of the object. A permanent magnet(13) is installed to the center of the core. Electromagnets(14) are installed on the both side of the permanent magnet and generate magnetic force.
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