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It is required to design a low-voltage, high-current, shunt-excited DC motor for hoisting drive in industrial overhead crane system. The output power of the machine is expected to be between (20+X) hp. The copper losses in the machine should be between 4% and 7% of the output power. The brush losses in the machine should be between 2% and 5% of the copper losses. The no load power should not exceed 6% of the output power. The motor speed is available between 900 and1200 rpm. The supply voltage is 240V. The brush voltage drop is 2V each. The magnetization curve is linear and given as ? (Wb) =0.025x(A). The flux per pole should not exceed 25 m Wb. The number of polesis up to 8 poles. The armature resistance is between (0.05 to 0.12) ?.Explain all your design steps and give all the machine parametersand variables ( , speed, armature current, armaturevoltage, , ).Assume any missing data and tabulate them in your report.(Note that "X" is your serial number, e.g., 01, 02, 10, 12, 20, ..etc?
metals are usually crystalline and seldom amorphous. most ceramics are crystalline but there are significant examples
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