Defining Data for the SLOT_AC Core Type
The general procedure for defining a SLOT_AC core type is as follows:
-
Double-click the Machine > Stator (or Machine > Rotor, if applicable) entry in the project tree to define data for the stator (or rotor). The Stator (or Rotor) Properties dialog box contains the following fields:
Number of Poles
The number of poles on which the winding is wound. Default is 2.
Number of Slots
The number of slots of the iron core. Default is 18.
Circuit Type
The drive circuit type.
Select from the following six types
(default is Y3):- Y3: Y-Type, 3-Phase
- L3: Loop-Type, 3-Phase
- S3: Star-Type, 3-Phase
- C2: Cross-Type, 2-Phase
- L4: Loop-Type, 4-Phase
- S4: Star-Type, 4-Phase
Note: When you place the mouse cursor over the circuit type, a circuit diagram of the selected type appears in the dialog.Slot Type
The slot type of the iron core. Click the Slot Type button to open the Select Slot Type dialog box. Select the desired type. Default is Type 1.
Note: When you place the mouse cursor over the slot type, a diagram of the selected type appears in the dialog box, displaying the slot dimension variables.Optionally, check User Defined Slot if you wish to define the slot dimensions using the Slot Editor.
Position Control
Determines if the drive circuit is controlled by position signals from a position sensor. (Checked for IPM Brushless DC Motor core type. Unchecked for all other types.)
-
Double-click the Core entry in the project tree to define data for the stator core. The core data Properties dialog box contains the following fields:
Outer Diameter
The outer diameter of the core.
Inner Diameter
The inner diameter of the core.
Length
The length of the core.
Stacking Factor
The effective magnetic length of the core.
Default is 0.95.
Steel Type
The steel type of the core. Click the button to open the Select Definition window and select the desired material.
Press Board Thickness
The thickness of the pole press boards.
Magnetic Press Board
Check the box if the press board is made of magnetic material.
Skew Width
The skew width measured in degrees.
Lamination Sectors
The number of lamination sectors.
-
Double-click the Slot entry in the project tree to define the stator slot dimensions. Enter the available slot dimensions.
An image of the selected slot type showing the dimension labels is displayed on the Diagram tab. The dimensions properties that appear depend on the Slot Type (selected above) and on whether or not Auto Design or Parallel Tooth is selected:
Auto Design
Check the box to have RMxprt auto design the Hs2, Bs1, and Bs2 dimensions.
Parallel Tooth
Check the box to have RMxprt design Bs1 and Bs2 based on Tooth Width.
– Available only when Auto Design is cleared.
Tooth Width
The tooth width for parallel tooth.
– Available only when Parallel Tooth is selected.
Hs0
– Always available.
Hs1
– Available only when the slot type is 2, 3, 4, 5, or 6.
Hs2
– Available only when Auto Design is cleared. When Auto Design is selected, this slot dimension is determined automatically.
Bs0
– Available only when the slot type is 1, 2, 3, 4, or 5.
Bs1
– Available only when Auto Design is cleared. When Auto Design is selected, this slot dimension is determined automatically. When Parallel Tooth is selected, this slot dimension is determined based on the value entered in the Tooth Width field.
Bs2
– Available only when Auto Design is cleared. When Auto Design is selected, this slot dimension is determined automatically. When Parallel Tooth is selected, this slot dimension is determined based on the value entered in the Tooth Width field.
Rs
– Available only when the slot type is 3 or 4.
- Double-click the Winding entry in the project tree to define the conductors, windings, and insulation data for the winding
- For an IPM Brushless DC Motor stator only, double-click the Circuit entry in the project tree to define the properties for the position control circuit.
- Optionally, you can right-click on Core in the project tree to insert or remove Vent data.