1. III. Draw the halfsectional front elevation and half sectional end view of a 25 kVA, 400 V, 1500 r.p.m. 3cp alternator with the following dimensions.

(i) Outside diameter of the stator stamping =400.

(ii) Inside diameter of the stator stamping =290.

(iii) Thickness of the stator stamping =36.

(iv) Stator core length =135.

(v) Slot type = open type.

(vi) No. of slots = 48.

(vii) Slots size = 32 x 12

(viii) Air gap = 2.

(ix) Pole axial length = 135.

(x) Pole width =70.

(xi) Pole height with shoe =75

(xii) Pole shoe height =18.

(xiii) Shaft diameter at centre =70.

(xiv) Shaft diameter at bearing = 55.

Other missing dimensions may be assumed.

(All dimensions are in mm.)