Question

DO NOT COPY FROM PREVIOUS SOLUTIONS

Design a low-voltage, high-current, shunt-excited DC motor for an industrial facility.

The motor should have the following specifications:

• The output power of the machine is expected to be between (50) 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 and 1200 rpm.
• The supply voltage is 240V.
• The brush voltage drop is 2V each.
• The magnetization curve is linear and given as ϕ (Wb) =0.025x (A).
• The flux per pole should not exceed 25 mWb.
• The number of poles is up to 8 poles.
• The armature resistance is between (0.05 to 0.12) Ω.

Fill the table below with the values of the parameters.

Parameter	Value	Unit
Pout		hp
Pout		Watt
Ka
Z
Number of Poles
Ipath
Ra
Vt
It
If
Ia
Ea
Tdev
Motor Speed
Pdev
Pcopper
Pbrush
Pno-load
Prot
Pinput
Tout
efficiency

Answer 1