APower input to an electric generator rotates at 180 rpm is 200 kW. Equivalent load at the centre of the shaft due to the weight of armature and magnetic pulls is 80 kN. Length of the shaft is Im between bearings. The shaft mate- rial has an ultimate shear strength of 380 MN/m2. Diameter of the shaft based on equivalent torsional moment is (A) 122 mm (C) 148 mm (B) 135 mm (D) 156 mm

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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APower input to an electric generator rotates at
180 rpm is 200 kW. Equivalent load at the centre of the shaft
due to the weight of armature and magnetic pulls is 80 kN.
Length of the shaft is Im between bearings. The shaft mate-
rial has an ultimate shear strength of 380 MN/m2. Diameter
of the shaft based on equivalent torsional moment is
(A) 122 mm
(C) 148 mm
(B) 135 mm
(D) 156 mm
Transcribed Image Text:APower input to an electric generator rotates at 180 rpm is 200 kW. Equivalent load at the centre of the shaft due to the weight of armature and magnetic pulls is 80 kN. Length of the shaft is Im between bearings. The shaft mate- rial has an ultimate shear strength of 380 MN/m2. Diameter of the shaft based on equivalent torsional moment is (A) 122 mm (C) 148 mm (B) 135 mm (D) 156 mm
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