MatMagnetics (class)

Method code available at https://github.com/Eomys/pyleecan/tree/master/pyleecan/Methods/Material/MatMagnetics

class MatMagnetics(mur_lin=1, Hc=0, Brm20=0, alpha_Br=0, Wlam=0, BH_curve=-1, LossData=-1, ModelBH=-1, is_BH_extrapolate=False, init_dict=None, init_str=None)

Bases: pyleecan.Classes._frozen.FrozenClass

magnetic material properties

VERSION = 1

get_BH()

Return the B(H) curve of the material according to the Import object. If there is no B(H) curve linear data are computed from mur_lin.

Parameters

self (MatMagnetics) – a MatMagnetics object

Returns

BH – B(H) values (two colums matrix: H and B(H))

Return type

numpy.ndarray

plot_BH(fig=None, grid=True, color='r')

Plot the curve B(H) at the specified frequency

Parameters

• self (MatMagnetics) – a MatMagnetics object

• fig – if None, open a new fig and plot, else add to the gcf (Default value = None)

Returns

Return type

None

save(save_path='', is_folder=False)

Save the object to the save_path

Parameters

• self – A pyleecan object

• save_path (str) – path to the folder to save the object

• is_folder (bool) – to split the object in different files: separate simulation machine and materials

copy(**kwargs)

Return a copy of the class

get_logger()

Get the object logger or its parent’s one

Parameters

obj – A pyleecan object

Returns

logger – Pyleecan object dedicated logger

Return type

logging.Logger

compare(other, name='self')

Compare two objects and return list of differences

as_dict(**kwargs)

Convert this object in a json serializable dict (can be use in __init__). Optional keyword input parameter is for internal use only and may prevent json serializability.

property mur_lin

Relative magnetic permeability

Type

float

Min

0

property Hc

Coercitivity field

Type

float

Min

0

property Brm20

magnet remanence induction at 20degC

Type

float

property alpha_Br

temperature coefficient for remanent flux density /degC compared to 20degC

Type

float

property Wlam

lamination sheet width without insulation [m] (0 == not laminated)

Type

float

Min

0

property BH_curve

nonlinear B(H) curve (two columns matrix, H and B(H))

Type

ImportMatrix

property LossData

specific loss data value triplets, i.e. B, f, P

Type

ImportMatrix

property ModelBH

a model of BH curve with an analytical expression

Type

ModelBH

property is_BH_extrapolate

1 to use ModelBH to fit input data and extrapolate BH curve

Type

bool