coordinate_transformation (method)¶
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ab2n(Z_ab, n=3, rot_dir=-1)[source]¶ 2 phase equivalent to n phase coordinate transformation, i.e. Clarke transformation
- Parameters
Z_ab (ndarray) – matrix (N x 2) of 2 phase equivalent values
n (integer) – number of phases
rot_dir (integer) – rotation direction of the fundamental of magnetic field (rot_dir = +/- 1)
- Returns
Z_n – transformed matrix (N x n) of n phase values
- Return type
ndarray
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n2ab(Z_n, n=3, rot_dir=-1)[source]¶ n phase to 2 phase equivalent coordinate transformation, i.e. Clarke transformation
- Parameters
Z_n (ndarray) – matrix (N x n) of n phase values
n (integer) – number of phases
rot_dir (integer) – rotation direction of the fundamental of magnetic field (rot_dir = +/- 1)
- Returns
Z_ab – transformed matrix (N x 2) of 2 phase equivalent values
- Return type
ndarray
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ab2dq(Z_ab, theta)[source]¶ alpha-beta to dq coordinate transformation NOTE: sin/cos values are rounded to avoid numerical errors
- Parameters
Z_ab (ndarray) – matrix (N x 2) of alpha-beta - reference frame values
theta (ndarray) – angle of the rotor coordinate system
- Returns
Z_dq – transformed (dq) values
- Return type
ndarray
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dq2ab(Z_dq, theta)[source]¶ dq to alpha-beta coordinate transformation NOTE: sin/cos values are rounded to avoid numerical errors
- Parameters
Z_dq (ndarray) – matrix (N x 2) of dq - reference frame values
theta (ndarray) – angle of the rotor coordinate system
- Returns
Z_ab – transformed array
- Return type
ndarray
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n2dq(Z_n, theta, n=3, rot_dir=-1, is_dq_rms=True)[source]¶ n phase to dq equivalent coordinate transformation
- Parameters
Z_n (ndarray) – matrix (N x n) of n phase values
n (integer) – number of phases
rot_dir (integer) – rotation direction of the fundamental of magnetic field (rot_dir = +/- 1)
is_dq_rms (boolean) – True to return dq currents in rms value (Pyleecan convention), False to return peak values
- Returns
Z_dq – transformed matrix (N x 2) of dq equivalent values
- Return type
ndarray
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dq2n(Z_dq, theta, n=3, rot_dir=-1, is_n_rms=False)[source]¶ n phase to dq equivalent coordinate transformation
- Parameters
Z_dq (ndarray) – matrix (N x 2) of dq phase values
n (integer) – number of phases
rot_dir (integer) – rotation direction of the fundamental of magnetic field (rot_dir = +/- 1)
is_n_rms (boolean) – True to return n currents in rms value, False to return peak values (Pyleecan convention)
- Returns
Z_n – transformed matrix (N x n) of n phase values
- Return type
ndarray