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Summary

FieldWindingSpec methods: FieldWindingSpec - is a class.

PROPERTIES

  • c - FIXME

  • overhang_length - winding overhang length Help for FieldWindingSpec/overhang_length is inherited from superclass POLYPHASEWINDINGSPEC

Methods

Class methods are listed below. Inherited methods are not included.

* FieldWindingSpec/FieldWindingSpec is a constructor.

this = FieldWindingSpec(varargin)

* end_winding_loop_matrix End-winding loop matrix, slot-segment.

L = end_winding_loop_matrix(this)

Returns a number_of_slots x phases matrix, representing how many times each phase traverses each ‘slot segment’ = end-winding piece between two successive slots.

Only computed for one end of a radial-flux machine. Help for FieldWindingSpec/end_winding_loop_matrix is inherited from superclass POLYPHASEWINDINGSPEC

* end_winding_segment_inductance Inductance of one end-winding segment.

Calculation somewhat follows the approach given by Lipo, T.A. (*) for a random-wound winding. Iron modelled as perfect conductor, to accound for eddy damping.

(*) Introduction to AC Machine Design

Only works for radial-flux machines. Help for FieldWindingSpec/end_winding_segment_inductance is inherited from superclass POLYPHASEWINDINGSPEC

* FieldWindingSpec/line_current_matrix is a function.

M = line_current_matrix(this)

* FieldWindingSpec/line_to_line_voltage_matrix is a function.

M = line_to_line_voltage_matrix(this)

* set_layout_matrix Initialize winding layout matrix.

A layout matrix is a number_of_layers x number_of_slots matrix of integers, with values in range -phases…phases.

The entries of the layout matrix W are:

  • W(i, j) = +k : phase k goes through layer i, slot j, to positive direction:

  • W(i, j) = -k : phase k goes through layer i, slot j, to negative direction: Help for FieldWindingSpec/set_layout_matrix is inherited from superclass POLYPHASEWINDINGSPEC

* winding_angle Compute winding angle.

a = winding_angle(this)

Compute the stator winding angle i.e. rotation angle for the direct-quadrature space vector transformation (without considering the rotor bias angle) so that injecting d-axis current into the stator winding generates a cosinusoidal airgap flux density waveform (first peak of fundamental at y = 0, assuming non-salient rotor). Help for FieldWindingSpec/winding_angle is inherited from superclass POLYPHASEWINDINGSPEC

* xy Transform to phase quantities

y = xy(this, dq, angles), where

  • angles : (rotor) angles in electrical degrees.

y = xy(this, dq) Help for FieldWindingSpec/xy is inherited from superclass POLYPHASEWINDINGSPEC