Stator Setup

Stator Core Geometry

Core parameters
DescriptionValueMANATEE parameter
Number of stator slots 36 Input.Geometry.Zs = 36
Outer Diameter 188 mm Input.Geometry.Dsy = 188e-3
Inner Diameter 110.7mm Input.Geometry.Dsbo = 110.7e-3
Stator length (without airducts) 165 mm Input.Geometry.Lst1 = 165e-3
Height of yoke 18.5 mm Input.Geometry.Hsy = 18.5e-3

The slot shape is selected following MANATEE slot schematics as :
Input.Geometry.type_slot_shapes = 21
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 Slot Parameters
DescriptionValueMANATEE Parameter
Slot isthmus height 1.3 mm Input.Geometry.H0s = 1.3e-3
Wedge height 0 mm Input.Geometry.H1s = 0
Slot height 18.75 mm Input.Geometry.H2s = 18.75e-3
Slot opening width 2.8 mm Input.Geometry.W0s = 2.8e-3
Wedge width 5.025 mm Input.Geometry.W1s = 5.025e-3
Slot bottom width 8.372 mm Input.Geometry.W2s = 8.372e-3

The lamination has no radial ventilation ducts as Input.Thermics.Nrvds = 0;

Electromagnetic data

The lamination material is set by Input.Material.mat_lam1 = ’M400-50A’;. All the material parameters will loaded from the material library. The B(H) curve is set by the material data in a .txt file (M400-50AJ.txt) in the MaterialData folder. The first column is the excitation field H in A/m starting from 0, and the first line is the value of the fundamental frequency at which the flux density B is given. Interpolation is used to calculate the effective B(H) curve at operating frequency.

For the saturation coefficient calculation, another curve B(H) can be used where B is given at very high magnetic field values using Input.Simu.type_BHsat = 1. This curve is input in the file M400-50AsatJ.txt. Alternatively, an analytical model can be setup by manually fitting the B(H) curve with Input.Simu.type_BHsat = 3.

Some post-processings (e.g. plot_BH function) allow checking the B(H) curves.

Stator Winding Setup

The winding that is modelled here is a random round wire (Input.Magnetics.type_conductor1 = 1) single layer overlapping integral distributed winding (Input.Magnetics.type_winding1 = 4).

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.

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.

Winding Parameters
DescriptionValueMANATEE Parameter
Number of turns per coil 3 Input.Magnetics.Ntcoil1 = 3
Number of parallel circuits 1 Input.Magnetics.Npcp1 = 1
Elementary wire width 5.2 mm Input.Geometry.Wwire1 = 5.2e-3
Number of random wires (strands) in parallel per coil 1 Input.Magnetics.Nwpc1 = 1
Force slot fill factor No Input.Geometry.is_forced_Ksfill1 = 0
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