G - Physics – 05 – F
Patent
G - Physics
05
F
G05F 1/10 (2006.01)
Patent
CA 2507731
The controller for a power converter of the present invention: calculates the range number in which the voltage command vector for a multi-level converter is present; rotates the voltage command vector through a specified angle; performs coordinate transformation of that vector to a vector in an oblique coordinate system which takes the vector in the a axis direction and a vector which has been rotated through a specified angle anti-clockwise from the a axis as two unit vectors; splits the converter output-enabled portion of the vector diagram of the -30 degrees ~ +30 degrees range of the spatial vector diagram in which output vector is positioned, which has undergone oblique coordinate transformation, into square-shape patterns so that the output vector is positioned in the upper left / the lower right / both the lower left and upper right of each square-shape pattern; splits any square-shape pattern which holds the output vector in both its lower left and its upper right into two triangular domains by a segment which joins the upper left vertex and the lower right vertex; judges in which square-shape pattern / triangular domain in the domain-split oblique coordinate system diagram the voltage command vector which has undergone oblique coordinate transformation is present; and selects, rotates through a specified angle and calculates the output vector which corresponds to that domain.
Miguchi Yasuhiko
Mizutani Mami
Fetherstonhaugh & Co.
Kabushiki Kaisha Toshiba
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