Stator Setup

Machine Dimensions

For the next step you need to enter the machine dimension using the following parameters:

Machine dimensions
DescriptionValueScript syntax
Stator outer diameter 400 mm Input.Geometry.Dsy=400e-3
Stator inner diameter 265 mm Input.Geometry.Dsbo=265e-3
Airgap width 1.5 mm Input.Geometry.gap=1.5e-3
Rotor back yoke diameter
(shaft diameter)
90 mm Input.Geometry.Dry=90e-3
Step 2 : Machine Dimensions
Step 2 : Machine Dimensions

Note that the processes to define the machine dimensions in the GUI and in the scripts are different. In the matlab script, there are several ways to define the dimensions to be able to run sensitivity study or optimization on yoke height or diameters. The laminations can either be defined:

  • using the external diameter and the yoke height (the inner diameter being deduced from the slot geometry)
  • using the external diameter and the inner diameter, the equivalent yoke height being deduced from the geometry.

For the rotor, as the airgap width is an input, there is no "Input.Geometry.Drbo". In the GUI we have only one method available: the inner and outer diameters of the stator and rotor laminations are needed and the airgap width is computed.

Stator Lamination

Core parameters
DescriptionValueScript syntax
Stator length (without airducts) 350 mm Input.Geometry.Lst1=350e-3
Stacking factor 95% Input.Geometry.Kst1=0.95
Material M400-50A Input.Material.mat_lam1=’M400-50A’
Skew No Input.Geometry.skew_rates=0
Radial ventilation ducts No Input.Thermics.Nrvds=0
Axial ventilation ducts No Input.Thermics.Navds=[0]
Step 3: Stator Lamination
Step 3: Stator Lamination

Material

The lamination material is set by Input.Material.mat_lam1 = ’M400-50A’. All the material parameters will be loaded from the material library. The B(H) curve is defined a .txt file (M400-50AJ.txt) in the MaterialData folder. A specific article deals with how to define a new B(H) curve.

Some post-processings (e.g. plot_BH function) allow to check the B(H) curves after calculation.

Stator Slot

The slot shape 10 is selected following MANATEE slot schematics.

Stator Slot Parameters
DescriptionValueScript syntax
Number of slot 36 Input.Geometry.Zs=36
Slot shape 10 Input.Geometry.type_slot_shapes = 10
Slot opening width 12 mm Input.Geometry.W0s = 12e-3
Wedge width 14 mm Input.Geometry.W1s = 14e-3
Slot bottom width 12 mm Input.Geometry.W2s = 12e-3
Slot isthmus height 1 mm Input.Geometry.H0s = 1e-3
Wedge height 1.5 mm Input.Geometry.H1s = [1.5e-3 0]
Slot height 30 mm Input.Geometry.H2s = 30e-3
Step 4: Stator Slot
Step 4: Stator Slot

You can verify that your slot and lamination definitions are correct by checking the outputs (surface, tooth width...) or by clicking on "Preview". Note that the Output and the Preview are available only if the slot is correct. Otherwise, by clicking on "Next" an error message should explain what is wrong with your slot.

Stator slot preview
Stator slot preview

For the script, depending on the slot type, some slot geometrical parameters may be defined as a vector of 2 elements, where the second element indicates whether the unit is in meter (0) or in radian (1). This is the case of H1 in the current slot type, which can be defined as a height in m or an angle in rad.

Stator Winding Setup

The winding pattern is defined as a three-phase double layer overlapping integral distributed winding (radial coil superposition) with a coil span of 5 slots:

Input.Magnetics.type_winding1 = 3;
Input.Magnetics.qs = 3;
Input.Magnetics.coil_pitch1 = 5;
Step 5: Stator Winding Pattern
Step 5: Stator Winding Pattern

MANATEE includes a winding algorithm that automatically generate distributed windings, or concentrated windings (alternate teeth wound or all teeth wound) but if necessary the user can directly input its own winding connection matrix or import a winding file generated by the winding design tool Koil freeware.

In the GUI you can preview your winding:

Stator winding preview
Stator winding preview
Winding Parameters
DescriptionValueScript syntax
Number of parallel circuits 2 Input.Magnetics.Npcp1 = 2
Number of turns per coil 7 Input.Magnetics.Ntcoil1 =7
Number of turn in series 42 Input.Magnetics.Ntsp1 = 42
Step 6: Stator Winding Parameters
Step 6: Stator Winding Parameters

The winding that is modelled here is a preformed wire with:

Conductor Parameters
DescriptionValueScript syntax
Conductor type Preformed wire Input.Magnetics.type_conductor1 = 0
Number of parallel strands
along horizontal direction
1 Input.Magnetics.Nwpc1_rad = 1
Number of parallel strands
along horizontal direction
1 Input.Magnetics.Nwpc1_tan = 1
Elementary wire width 10 mm Input.Geometry.Wwire1 = 10e-3
Elementary wire height 2 mm Input.Geometry.Hwire1 = 2e-3
Insulation thickness 0.001 mm Input.Geometry.Wins_wire1 =1e-6
Step 7: Stator Winding Conductor
Step 7: Stator Winding Conductor

In the script, if one wants MANATEE to calculate the slot fill factor one must put

Input.Geometry.is_forced_Ksfill1 = 0


Alternatively, one can directly specify the slot fill factor Ksfill1 within the input structure. The slot fill factor evaluation is used in subdomain and FEM electromagnetic models. It can be interesting to let MANATEE calculate the slot fill factor to check if the winding has been properly defined and if the slot geometry is correctly defined.

Step 8: Stator Endwinding
Step 8: Stator Endwinding
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