Defining the Stator Windings for a Single-Phase Induction Motor

Define the wires, conductors, insulation, and windings of the stator.

To define the wires and windings:

To open the Stator Winding Properties window, double-click the Machine-Stator-Winding entry in the Project Manager tree on the desktop. You can also enter values in the Properties section of the desktop without opening a separate window.
Click the Winding tab.
Enter the thickness of the slot liner in the Slot Liner field.
Enter the thickness of the wedge insulation in the Wedge Thickness field.
Enter the limited slot fill factor for the wire design in the Limited Fill Factor field. The slot fill factor is the ratio between the cross-sectional area of all conductors in one slot and the entire slot area.
Select or clear the Include Series Winding check box. This option sets whether or not to include the series winding in the speed adjustment. When this option is selected, a third tab, Series (C), appears in the Properties window.
Enter the number of layers in the Winding Layers field.
Enter the number of slots in the Coil Pitch field.
Select a Winding Type:

Click the button for Winding Type.
The Winding Type window appears.

Select from one of the following types of winding:

Lap
Sin_1
Sin_2
Editor

When you place the mouse cursor over a winding button, an outline of the selected winding appears. The following table describes the four types of windings that are possible:

Editor	A user-defined one or two-layer winding arrangement, determined by your Winding Layers selection. Enables the Winding Editor, where you can specify a different winding arrangement for each slot.
Lap	90 deg phase belt 2-layer coil for both single and double layer
Sin_1	A first-class sinusoidal coil for double layer only. The Conductors per Layer field defines the maximum number of conductors in the slot. The software will determine the winding distribution in the slots to get the sinusoidal current distribution.
Sin_2	A second-class sinusoidal coil for double layer only. The Conductors per Layer field defines the maximum number of conductors in the slot. The software will determine the winding distribution in the slots to get the sinusoidal current distribution.

Once you have clicked a button to select a winding, click OK to close the Winding Type window and return to the Properties window.

Click the Main (A) tab.

Enter the end length adjustment of the main stator coil in the End Extension field. The end adjustment is the distance one end of the conductor extends vertically beyond the end of the stator.
Enter the number of conductors per layer of main winding in the Conductors per Layer field.
Enter the number of parallel branches in the main stator winding in the Parallel Branches field.
Enter the number of wires per conductor in the Number of Strands field. Enter 0 to have RMxprt auto-design the value.
Enter the thickness of the double-sided wire wrap in the Wire Wrap field. Enter 0 to automatically obtain this value from the wire library.
To select the Wire Size: Click the button for Wire Size.
The Wire Size window appears.
Select a value from the Wire Diameter drop-down menu.

Select a wire gauge from the Gauge drop-down menu. You can select from the following options:

<*number*>	You can select a specific gauge number. When you select a gauge number, the Wire Diameter field is automatically updated.
USER	This option allows you to manually enter the Wire Diameter. This is useful when you want to enter a diameter that does not correspond to a particular wire gauge.
AUTO	This option sets the Wire Diameter to zero, and RMxprt automatically calculates the optimal value. The diameter information is then written to the output file when you analyze the design.
MIXED	This option allows you to define a conductor that is made of different size wires. For example, a single conductor may consist of five wires: three wires with a diameter of 0.21 mm and two wires with a diameter of 0.13 mm.

The gauge number is based on AWG settings. You can create your own wire table using Machine > Wire, and then you can select this wire table using Tools > Options > General Options> Machines.

Enter the inner radius of the base corner in the Base Inner Radius field.
Enter the inner diameter of the coil tip in the Tip Inner Diameter field.
Enter the distance between two stator coils in the End Clearance field.
Enter the thickness of the slot liner insulation in the Slot Liner field.
Enter the thickness of the wedge insulation in the Wedge Thickness field.
Enter the thickness of the insulation layer in the Layer Insulation field.
Enter the limited slot fill factor for the wire design in the Limited Fill Factor field. The slot fill factor is the ratio between the cross-sectional area of all conductors in one slot and the entire slot area.
When you are done setting the wire size, click OK to close the Wire Size window and return to the Properties window.

Click the Aux (B) tab.

Enter the end length adjustment of the auxiliary stator coil in the End Extension field.
Enter the number of conductors per layer of auxiliary winding in the Conductors per Layer field.
Enter the number of parallel branches in the auxiliary stator winding in the Parallel Branches field.
Enter the number of wires per conductor in the Number of Strands field. Enter 0 to have RMxprt auto-design the value.
Enter the thickness of the double-sided wire wrap in the Wire Wrap field. Enter 0 to automatically obtain this value from the wire library.
To select the Wire Size: Click the button for Wire Size.
The Wire Size window appears.
Select a value from the Wire Diameter drop-down menu.

Select a wire gauge from the Gauge drop-down menu. You can select from the following options:

<*number*>	You can select a specific gauge number. When you select a gauge number, the Wire Diameter field is automatically updated.
USER	This option allows you to manually enter the Wire Diameter. This is useful when you want to enter a diameter that does not correspond to a particular wire gauge.
AUTO	This option sets the Wire Diameter to zero, and RMxprt automatically calculates the optimal value. The diameter information is then written to the output file when you analyze the design.
MIXED	This option allows you to define a conductor that is made of different size wires. For example, a single conductor may consist of five wires: three wires with a diameter of 0.21 mm and two wires with a diameter of 0.13 mm.

When you are done setting the wire size, click OK to close the Wire Size window and return to the Properties window.

Click OK to close the Properties window.