STEEL PLATE LIFTING METHOD WITH USE OF LIFTING MAGNET, LIFTING MAGNET, AND METHOD FOR MANUFACTURING STEEL PLATE BY USING LIFTING MAGNET
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United States of America Patent
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Issued Date -
Mar 28, 2024
app pub date -
Dec 15, 2021
filing date -
Feb 26, 2021
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Abstract
A method for using a lifting magnet and a lifting magnet. The lifting magnet includes a plurality of electromagnet coils that are each independently ON/OFF-controllable and voltage-controllable, and a magnetic pole that is excited by application of a voltage to the electromagnet coils. An electromagnet coil to be used for lifting steel plates is determined based on a total thickness of the steel plates to be lifted. An amount of passing magnetic flux Φr in the magnetic pole in a case where magnetic flux passes through only the steel plates to be lifted when the electromagnet coil is used is calculated. An application voltage to be applied to the electromagnet coil used for lifting the steel plates is determined based on the amount of passing magnetic flux Φr. The application voltage is applied to the electromagnet coil.
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