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(Solved): A simple electromagnetic device for lifting a U-shapped steel beam is shown in the diagram below. T ...



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A simple electromagnetic device for lifting a U-shapped steel beam is shown in the diagram below. The U-shapped steel beam being lifted is solid material having a relative permeability of with a depth. The magnetic core is also -shaped with a depth, but it is built out of high-grade magnetic material having a relative permeability of . Assume that the relative permeability of both materials are infinitive. The coil has a DC resistance of , and a DC voltage of is applied to the coil. The air gaps between the core and the steel beam are . Calculate the MMF, the net reluctance of the magnetic circuit, and the total magnetic flux. Use . The magnetic motive force is The total reluctance is The magnetic flux for this circuit is A.t 1.t/Wb


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