pyleecan.Classes.LamSquirrelCage module

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

class LamSquirrelCage(Hscr=0.03, Lscr=0.015, ring_mat=- 1, Ksfill=None, winding=- 1, slot=- 1, L1=0.35, mat_type=- 1, Nrvd=0, Wrvd=0, Kf1=0.95, is_internal=True, Rint=0, Rext=1, is_stator=True, axial_vent=- 1, notch=- 1, skew=None, bore=None, yoke=None, init_dict=None, init_str=None)[source]

Bases: LamSlotWind

squirrel cages lamination

VERSION = 1
build_geometry(sym=1, alpha=0, delta=0, is_circular_radius=False)

Build geometry of the LamSquirrelCage

Parameters:

  • self – LamSquirrelCage Object

  • sym (int) – Symmetry factor (1= full machine, 2= half of the machine…)

  • alpha (float) – Angle for rotation [rad]

  • delta (complex) – Complex value for translation

  • is_circular_radius (bool) – True to add surfaces to “close” the Lamination radii

Returns:

surf_list – list of surfaces

Return type:

list

check()

Check that the Lamination object is correct

Parameters:

self (LamSquirrelCage) – A LamSquirrelCage object

Return type:

None

Raises:

  • SCC_NotARotor – A LamSquirrelCage Lamination can’t be a stator

  • SCC_WrongCond – A LamSquirrelCage’s conductor must be a type 2_1

comp_length_ring()

Computation of the squirrel cage end-ring average perimeter (circumferential length)

Parameters:

self (LamSquirrelCage) – A LamSquirrelCage object

Returns:

Lring – Length of the ring [m]

Return type:

float

plot(fig=None, ax=None, is_lam_only=False, sym=1, alpha=0, delta=0, is_edge_only=False, edgecolor=None, is_add_arrow=False, is_show_fig=True, is_winding_connection=False)

Plot the Lamination in a matplotlib fig

Parameters:

  • self (LamSquirrelCage) – A LamSquirrelCage object

  • fig (Matplotlib.figure.Figure) – existing figure to use if None create a new one

  • ax (Matplotlib.axes.Axes object) – Axis on which to plot the data

  • is_lam_only (bool) – True to plot only the lamination (remove the bare)

  • sym (int) – Symmetry factor (1= full machine, 2= half of the machine…)

  • alpha (float) – Angle for rotation [rad]

  • delta (complex) – Complex value for translation

  • is_edge_only (bool) – To plot transparent Patches

  • edgecolor – Color of the edges if is_edge_only=True

  • is_show_fig (bool) – To call show at the end of the method

  • is_winding_connection (bool) – True to display winding connections (not used)

Returns:

  • fig (Matplotlib.figure.Figure) – Figure containing the plot

  • ax (Matplotlib.axes.Axes object) – Axis containing the plot

comp_number_phase_eq()

Compute the equivalent number of phase

Parameters:

self (LamSquirrelCage) – A LamSquirrelCage object

Returns:

qb – Zs/p

Return type:

float

comp_surface_ring()

Computation of the ring cross-section surface area

Parameters:

self (LamSquirrelCage) – A LamSquirrelCage object

Returns:

Lring – Surface area of the cross-section of the ring [m^2]

Return type:

float

comp_resistance_wind(T=20)

Computation of the equivalent rotor resistance per phase of a cage winding with ‘qs’ number of phases

Parameters:

  • self (LamSquirrelCage) – A LamSquirrelCage object

  • T (float) – mean winding temperature [°C], default value is 20°C

Returns:

Rrot – resistance of the rotor [Ohm]

Return type:

float

get_name_phase()

Return the name of the winding phases

Parameters:

self (LamSquirrelCage) – A LamSquirrelCage object

Returns:

name_phase – Empty list

Return type:

list

comp_angle_d_axis()

Compute the angle between the X axis and the first d+ axis By convention a “Tooth” is centered on the X axis

Parameters:

self (LamSquirrelCage) – A LamSquirrelCage object

Returns:

d_angle – angle between the X axis and the first d+ axis

Return type:

float

comp_periodicity_spatial()

Compute the periodicity factor of the lamination

Parameters:

self (LamSquirrelCage) – A LamSquirrelCage object

Returns:

  • per_a (int) – Number of spatial periodicities of the lamination

  • is_antiper_a (bool) – True if an spatial anti-periodicity is possible after the periodicities

comp_masses()

Compute the Lamination masses

Parameters:

self (LamSquirrelCage) – A LamSquirrelCage object

Returns:

M_dict – Lamination mass dictionary (Mtot, Mlam, Mwind, Mring) [kg]

Return type:

dict

plot_schematics_scr(is_default=False, is_add_schematics=True, is_add_main_line=True, save_path=None, is_show_fig=True, fig=None, ax=None)

Plot the schematics of the short circuit ring

Parameters:

  • self (LamSquirrelCage) – A LamSquirrelCage object

  • is_default (bool) – True: plot default schematics, else use current lamination values

  • is_add_schematics (bool) – True to display the schematics information (Hscr, Lscr…)

  • is_add_main_line (bool) – True to display “main lines” (dotted lines and Z axis)

  • save_path (str) – full path including folder, name and extension of the file to save if save_path is not None

  • is_show_fig (bool) – To call show at the end of the method

  • fig (Matplotlib.figure.Figure) – existing figure to use if None create a new one

  • ax (Matplotlib.axes.Axes object) – Axis on which to plot the data

Returns:

  • fig (Matplotlib.figure.Figure) – Figure containing the plot

  • ax (Matplotlib.axes.Axes object) – Axis containing the plot

plot_side(fig=None, ax=None, is_show_fig=True, save_path=None)

Plot the side view of the Lamination in a matplotlib fig (Z axis left to right)

Parameters:

  • self (LamSquirrelCage) – A LamSquirrelCage object

  • fig (Matplotlib.figure.Figure) – existing figure to use if None create a new one

  • ax (Matplotlib.axes.Axes object) – Axis on which to plot the data

  • is_show_fig (bool) – To call show at the end of the method

  • save_path (str) – full path including folder, name and extension of the file to save if save_path is not None

Returns:

  • fig (Matplotlib.figure.Figure) – Figure containing the plot

  • ax (Matplotlib.axes.Axes object) – Axis containing the plot

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 Hscr

short circuit ring section radial height [m]

Type:

float

Min:

0

property Lscr

short circuit ring section axial length

Type:

float

Min:

0

property ring_mat

Material of the Rotor short circuit ring

Type:

Material