pyleecan.Classes.Winding module

Method code available at https://github.com/Eomys/pyleecan/tree/master/pyleecan/Methods/Machine/Winding

class Winding(is_reverse_wind=False, Nslot_shift_wind=0, qs=3, Ntcoil=7, Npcp=2, type_connection=0, p=3, Lewout=0.015, conductor=- 1, coil_pitch=1, wind_mat=None, Nlayer=1, per_a=None, is_aper_a=None, end_winding=- 1, is_reverse_layer=False, is_change_layer=False, is_permute_B_C=False, init_dict=None, init_str=None)[source]

Bases: FrozenClass

Winding class generating connection matrix using Star of slots method (coupling with SWAT-EM)

VERSION = 1
NAME = 'Star of slots'
comp_connection_mat(Zs=None, p=None)

Compute the Winding Matrix for

Parameters:
  • self (Winding) – A: Winding object

  • Zs (int) – Number of Slot (Integer >0)

  • p (int) – Number of pole pairs (Integer >0)

Returns:

wind_mat – Winding Matrix (1, 1, Zs, qs)

Return type:

numpy.ndarray

Raises:

WindingT2DefNtError – Zs/qs/2 must be an integer

comp_length_endwinding()

Compute the Winding overhang length on one side for a half-turn[m]

Parameters:

self (Winding) – A Winding object

Returns:

Lewout – End-winding length on one side for a half-turn [m].

Return type:

float

comp_Ncspc(Zs=None)

Compute the number of coils in series per parallel circuit

Parameters:
  • self (Winding) – A Winding object

  • Zs (int) – number of slot

Returns:

Ncspc – Number of coils in series per parallel circuit

Return type:

float

comp_Ntsp(Zs=None)

Compute the number of turns in series per phase

Parameters:
  • self (Winding) – A Winding object

  • Zs (int) – Number of slot

Returns:

Ntspc – Number of turns in series per phase

Return type:

float

comp_periodicity(wind_mat=None)

Computes the winding matrix (anti-)periodicity

Parameters:
  • self (Winding) – A Winding object

  • wind_mat (ndarray) – Winding connection matrix

Returns:

  • per_a (int) – Number of spatial periods of the winding

  • is_aper_a (bool) – True if the winding is anti-periodic over space

comp_phasor_angle(Zs=None)

Compute the phasor angle of the winding phases related to the first slot

Parameters:
  • self (Winding) – A: Winding object

  • Zs (int) – Number of Slot (Integer >0)

Returns:

angle_vec – Phasor Angle Vector (qs)

Return type:

numpy.ndarray

comp_winding_factor(Harmonics=[1])

Compute the winding factor of phase 1 (asuming symmetry)

Parameters:
  • self (Winding) – A: Winding object

  • Harmonics (list of floats) – list of harmonics to calculate the winding factor

Returns:

xi – winding factor

Return type:

numpy.ndarray

get_connection_mat(Zs=None, p=None)

Get the Winding Matrix

Parameters:
  • self (Winding) – A: Winding object

  • Zs (int) – Number of Slot (Integer >0)

  • p (int) – Number of pole pairs (Integer >0)

Returns:

wind_mat – Winding Matrix (1, 1, Zs, qs)

Return type:

numpy.ndarray

get_dim_wind()

Get the two first dimension of the winding matrix

Parameters:

self (Winding) – A Winding object

Returns:

(Nrad, Ntan) – Number of layer in radial and tangential direction

Return type:

tuple

get_periodicity()

Computes the winding matrix (anti-)periodicity

Parameters:

self (Winding) – A Winding object

Returns:

  • per_a (int) – Number of spatial periods of the winding

  • is_aper_a (bool) – True if the winding is anti-periodic over space

export_to_csv(file_path=None, is_add_header=True, is_skip_empty=False)

Export the winding matrix to a csv file. One matrix for each phase Column Slot id, Ntcoil, Rad id, Tan id

Parameters:
  • self (Winding) – A: Winding object

  • file_path (str) – Path to the file to save

  • is_add_header (bool) – True to add first line and first column

  • is_skip_empty (bool) – True to remove the lines with Ntcoil=0

clean()

Clean the internal properties (wind_mat and periodicity)

Parameters:

self (Winding) – A Winding object

save(save_path='', is_folder=False, type_handle_old=2, type_compression=0)

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 (json only)

  • type_handle_old (int) – How to handle old file in folder mode (0:Nothing, 1:Delete, 2:Move to “Backup” folder)

  • type_compression (int) – Available only for json, 0: no compression, 1: gzip

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', ignore_list=None, is_add_value=False)[source]

Compare two objects and return list of differences

as_dict(type_handle_ndarray=0, keep_function=False, **kwargs)[source]

Convert this object in a json serializable dict (can be use in __init__). type_handle_ndarray: int

How to handle ndarray (0: tolist, 1: copy, 2: nothing)

keep_functionbool

True to keep the function object, else return str

Optional keyword input parameter is for internal use only and may prevent json serializability.

copy()[source]

Creates a deepcopy of the object

property is_reverse_wind

1 to reverse the default winding algorithm along the airgap (c, b, a instead of a, b, c along the trigonometric direction)

Type:

bool

property Nslot_shift_wind

0 not to change the stator winding connection matrix built by pyleecan number of slots to shift the coils obtained with pyleecan winding algorithm (a, b, c becomes b, c, a with Nslot_shift_wind1=1)

Type:

int

property qs

number of phases

Type:

int

Min:

0

property Ntcoil

number of turns per coil

Type:

int

Min:

1

property Npcp

number of parallel circuits per phase

Type:

int

Min:

1

property type_connection

0 star (Y), 1 triangle (delta), -1 no connection

Type:

int

Min:

-1

Max:

1

Type:

Winding connection

property p

pole pairs number

Type:

int

Min:

1

property Lewout

straight length of the conductors outside the lamination before the curved part of winding overhang [m] - can be negative to tune the average turn length

Type:

float

Min:

0

property conductor

Winding’s conductor

Type:

Conductor

property coil_pitch

Coil pitch (or coil span)

Type:

int

property wind_mat

Winding matrix calculated with Star of slots (from SWAT_EM package)

Type:

ndarray

property Nlayer

Number of layers per slots

Type:

int

Min:

1

property per_a

Number of spatial periods of the winding

Type:

int

Min:

1

property is_aper_a

True if the winding is anti-periodic over space

Type:

bool

property end_winding

End Winding’s definition

Type:

EndWinding

property is_reverse_layer

1 to reverse the layers (rad from 0 to Nrad-1 => Nrad-1 to 0)

Type:

bool

property is_change_layer

1 to change the layer from radial to tangential or tangential to radial

Type:

bool

property is_permute_B_C

True to permute phase B and phase C

Type:

bool