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US 12,679,701 B2Granted
Lifting magnet and steel plate lifting apparatus, and steel plate conveying method
AssigneeJfe Steel Corporation
InventorsYuki Takaki, Yusuke Yoshinari, Kyohei Ishida, Masami Tate, Takeshi Taki
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Abstract
A lifting magnet including a plurality of electromagnetic coils that are disposed in a nesting arrangement and capable of being independently ON/OFF-controlled and voltage-controlled. By using the plurality of electromagnetic coils in a selective or appropriately combined manner, the lifting magnet secures a sufficient magnetic flux penetration depth during conveyance of steel plates, and can easily and highly precisely control the magnetic flux penetration depth in accordance with the number of steel plates to be lifted.
Claims10
A lifting magnet comprising:
- a plurality of electromagnetic coils disposed in a nested arrangement and configured to be independently ON/OFF-controlled and voltage-controlled;
- an inner pole disposed inside an innermost coil of the plurality of electromagnetic coils;
- an intermediate pole interposed between adjacent coils of the plurality of electromagnetic coils;
- an outer pole disposed outside an outermost coil of the plurality of electromagnetic coils;
- and
- a yoke disposed in contact with upper ends of the inner pole, the intermediate pole, and the outer pole;
- wherein a maximum amount of magnetic flux of the innermost coil is smaller than a maximum amount of magnetic flux of all other electromagnetic coils.
4 more elements
Dependencies are inferred from the claim text.