<-- Back Items 18 - 23

Item 24. Slot Dimensions, s
Use: s = l_final - t_end
Rounded to the nearest three decimals.

Slot Tolerance, s_t
Use: s_t = 0.04 s
Usually, slot tolerance is about 4% of the slot width.

Item 24a. Available Slot Space, s_s
Use: s_s = s - s_t.

Item 24b. Slot Conductor Space, s_c
Use: s_c = s_s - 2 d_l
Where d_l = Item 28a. Rounded to the nearest three decimals.

Item 24b. Slot Opening, w_A
Use: w_A = d / 10
Where d = slot depth, Item 28. Rounded to the nearest three decimals.

Item 25. Current Density, amp per square in, D
Use: D_trial = (k / q ) + (v / 4 ),
where: k = 700,000 to 1,000,000, common value = 500,000.
Use: D_final = Ic / CS_final
D_final should be within 1,500 to 3,300 A/sq.in.
Rounded to the nearest 100.

Item 26. Cross Section Area of Winding, CS
Use: CS_trial = Ic / D_trial
Use: CS_final = AWG_sq.in. / a
where AWG_sq.in. = Area of the chosen AWG from Table 1 in square inches.
where a = Number of parallel paths.

Item 27. Dimensions of Wire, a × AWG
Number of Parallel Paths, a
Use: a_trial = 1, 2, 3
Use: a_final = s_c / f_dcc
Where: s_c = slot conductor space, Item 24b
f_dcc = diameter of wire in dcc for the selected AWG No. from Table 1.
Cross Sectional Area of Conductor per Parallel Path, AWG
Use: AWG_trial = CS_trial / a
For the final value, select the most suitable AWG No. from Table 1 on p. 431. The selected wire, AWG_table, should be LESS THAN the AWG_trial.

Item 28. Stator Slot Depth, d
Use: d = 2 d_l + d_c + d_w + d_t + d_a + d_x
Where: d is usually between 1 to 4 inches.

Item 28a. Stator Slot Lining, d_l
Use: d_l = 27 + ( Vt / 30 ) mills.
Item 28b. Depth of Conductors, d_c
Use: d_c = CS_final × f_dcc
Item 28c. Depth of Wedge, d_w
Use: d_w = 25 + ( Vt / 45 ) + ( HP / 100 ) mills.
This value: d_w is usually about 3% of d_c. Should the above formula gives a smaller value, use 3% d_c, instead.
Item 28d. Tooth Thickness, d_t
Use: d_t = approx. 2 d_l.
Item 28e. Allowances for Spaces Between Wires, d_a
Use: d_a = approx. 58% f_dcc.

Item 28f. Ratio of Slot depth and Slot Width, d/s
d/s = 3.5 to 4.5 inches.
If d/s is out of range, add an extra depth, d_x, to make the depth at least equal to 1 inch, else change Slot per Pole per Phase: n_s, or Stator Internal Diameter: D, or add a multiple of 1/8" to pole pitch, t.

Items 29 - 32

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