AC Lap Winding

AC LAP WINDING

AIM:

Design and draw a developed winding diagram of a double layer Lap winding for a three phase, 6 poles, 18 slots machine. Assume that the winding is full pitched.

PROCEDURE:

         The following general commands are used to draw the developed AC lap winding diagram using Auto cad.

Step 1: Set the limits of the drawing screen.

Step 2: PUT ORTHO ON where ever necessary.

Step 3: Using OSNAP function.

Step 4: Draw conductors of appropriate dimension using LINE Command

Step 5: Use rectangular Array Command for making rows and columns of conductors

Step 6: Use p-line command for making arrows.

Step 7: Use Rectangular command for making poles.

Step 8: Make the numbers on the conductors using TEXT Command.

Step 9: Use Copy, Hatch, Donut, Arc Commands.

Step 10: Command: – q Save.

Solution:

Slots/pole/phase (spp)= 18/(6 x 3)  =  1 slot

For full pitched coils, coil span= pole pitch =18/6=3 slots.

Top coil side 1 in slot 1 is connected to bottom coil side 8 in slot 4. Top coil side 3 in slot 2 is connected to bottom coil side 10 in slot 5 and so on.

Pole pitch corresponding to 180^o electrical

Here, the no of slots in one pole pitch=3 slots

Thus one pole phase group consists of two slots.

Angle between consecutive slots = 180^o /3 =60^o electrical

We know that the phase one displaced by 120^o electrical

No of slots by which the phase are displaced= 120^o/60^o = 2 slots

RESULT:

                  The AC Lap winding is drawn by using AutoCAD software.