Explanation: The minimum value of the current density in the damper bars is given to be 3 A per mm2. The maximum value of the current density in the damper bars is given to be 4 A per mm2.

Explanation: The slot pitch of damper windings is 20% of the stator slot pitch. This is because to reduce the current induced in damper windings by tooth ripples.

Explanation: The number of bars per pole is calculated along with the stator slot pitch. Next, all the values are multiplied by 0.8 and the pole arc value is obtained.

Explanation: Length of each damper bar = 1.1 * axial length is the formula for the length of each damper bar for small machines. length of each damper bar = axial length + 0.1 is the formula for the length of each damper bar for large machines.

Explanation: The total area of bars per pole is first obtained. Next the number of damper bars per pole is calculated and the ratio gives the area of cross section of each damper bar.

Explanation: First the area of damper bars is calculated first. Next the area of damper bars is multiplied by a value between 0.8-1 to obtain the area of each ring short-circuiting the bars.

Area of each bar = 473/8 = 59 mm2.

Explanation: First the diameter of the damper bars is calculated. It is then multiplied by 2 to get the height of pole shoe.

Explanation: The pole profile drawing is essential to obtain the design characteristics of the rotor. It helps in the process of obtaining the various dimensions of the pole.

Explanation: The pole shoe surface can be drawn with the armature surface being fixed. The pole shoe drawing is completed by fixing the height of pole shoe.