Polyphase Winding Editor

RMxprt provides a Winding Editor in order for users to design variety of special winding types according to their own needs, such as compound single- and double-layer winding, big- and small-phase-spread variable-pole multiple-speed winding, sine-wave three-phase winding, and so forth. The Winding Editor is available to the following types of electric machines:

• Three-phase Induction Motor
• Three-phase Synchronous Motor
• Three-phase Synchronous Generator
• Permanent-magnet Synchronous Generator
• Line-start Permanent-magnet Synchronous Motor
• Adjustable-speed Permanent-magnet Synchronous Motor
• Brushless Permanent-magnet DC Motor
• Claw-pole Alternator

You input data for Number of Poles in the Machine Properties window and data for the Number of Slots and Slot Type in the StatorProperties window. You set the Number of Slots in the Winding Properties window. RMxprt automatically arranges the winding layout and display the relevant information that has been specified in the Winding Editor tab of the RMxprt main window. As long as the edited winding data have been saved, the Winding Editor tab will display the last saved winding data whenever Winding Editor dialog is launched. The left top part of the Winding Editor tab shows the winding data, as does the Winding Editor dialog box. In this area, the total number of rows equals half the number of slots.

Enabling the Winding Editor

Setting the Winding Type property to Editor enables the Machine > Edit Layout command on the menu bar. To display the Winding Editor:

1. Open the Winding Properties window and set the Winding property to Editor.

To do this, double-click on the Winding property button to display the Winding Type selection window.

2. Select Editor as the Winding Type and click OK.

This closes the Winding Type window and sets the Winding Type property to Editor. It also enables the Machine > Edit Layout command on the menu bar.

3. Click Machine > Edit Layout.

This displays the Winding Editor window. The Winding Editor window includes functions that do not appear in the RMxprt main window Winding Editor tab.

Other ways to invoke the Winding Editor window:

1. Right-click on the data table section of the Winding Editor tab of the main window. This displays an Edit Layout button.
2. Click the Edit Layout button to display the Winding Editor window.

Or you can right-click in the Winding Editor tab main window display, and select Edit Layout from the context menu.

Each row of the winding data is identified with coil index in the Coil column. This information is displayed in the Winding Editor tab in the RMxprt Main window, and it editable in the Winding Editor window.

• Column Phase is for the phase to which the coil belongs.
• Column Turns is for the number of turns of coil.
• Column In Slots is for the slot number with the coil side current flowing in ('flow-in-side' for short). If 2 Layers are specified in the Winding Properties window, the slot number ends with a "T" to show the top layer.
• Column Out Slots is for the slot number with the coil side current flowing out ('flow-out-side' for short). If 2 Layers are specified in the Winding Properties window, the slot number ends with a "B" to show the bottom layer.

By changing the belonging phase in column Phase, the number of turns in column Turns, the flow-in-side slot number in column In Slot, the flow-out-side slot number in column Out Slot for each coil, it is possible to arrange the distribution of coils of single and double layer winding of any type required.

The Winding Editor dialog also includes three check boxes:

• Periodic Multiplier: indicates the possibility to select the number of unit machines for editing winding arrangement. It has a drop-down menu to show the possible numbers for the periodic multiplier.

When checked, the drop-down menu box to the right displays the numbers of unit machines for selection. Selecting 1 means whole slots are considered as one unit machine, and all coils is listed in the table of the edit window. Selecting 2 lists half of the total coils in the table, and whole slots are divided into two unit machines, etc. When the check box Periodic Multiplier: is unchecked, the drop-down menu to the right is disabled; all the coils are listed in the table.

• Constant Turns: Checking the check box (multiple choices) indicates that the number of turns keeps constant and the column Turns in the table is grayed (disabled). If the check box Constant Turns is unchecked, the column Turns in the table is brightened allowing for editing and modifying the number of turns.

• Constant Pitch: Checking this box grays the Out Slots column to the values cannot be edited. It means that the coil pitch is constant. For two-layer windings, all flow-in-side slots are defined as top layer, and all flow-out-side slots as bottom layer. The flow-out-side slot number is automatically computed based on the input in the edit box Coil Pitch in Stator2 page in RMxprt window, and Out Slot column is disabled.

When the check box Constant Pitch is unchecked, the column Out Slot is enabled to allow arbitrarily changing slot pitch for each coil.

The Winding Editor dialog includes three command buttons:

• Click the command button Default in the window Winding Editor, all the data in the table resumes to the situation of data from automatic arrangement by RMxprt.
• Click the command button Reset in the window Winding Editor, all the data in the table resumes to the situation of data when the window Winding Editor was first opened, or resumes to the data that you have saved.
• Click OK to accept the current values and close the Winding Editor window.