Space vector modulation: Difference between revisions

Revision as of 01:06, 23 September 2009

Revision as of 18:59, 7 October 2009

Line 132:

[[Image:Space_Vector_Modulation.gif|center|thumb|400px|All eight possible switching vectors for a three-leg inverter using space vector modulation. An example V_ref is shown in the first sector. V_{ref_MAX} is the maximum amplitude of V_ref before non-linear overmodulation is reached.]]

More complicated SVM strategies for the unbalanced operation of four-leg three-phase inverters do exist. In these strategies the switching vectors define a 3D shape (a hexagonal [[Prism (geometry)| prism]] in <math>\alpha\beta\gamma</math> coordinates<ref>R. Zhang, V. Himamshu Prasad, D. Boroyevich and F.C. Lee, "Three-Dimensional Space Vector Modulation for Four-Leg Voltage-Source Converters," IEEE Power Electronics Letters, vol. 17, no. 3, May 2002</ref> or a [[Dodecahedron | dodecahedron]] in abc Three-Dimensional Space Vector Modulation in abc scoordinates<ref>M.A. Perales, M.M. Prats, R.Portillo, J.L. Mora, J.I. León, and L.G. Franquelo, "Three-Dimensional Space Vector Modulation in abc Coordinates for Four-Leg Voltage Source Converters," IEEE Power Electronics Letters, vol. 1, no. 4, December 2003</ref>) rather than a 2D [[hexagon | hexagon]].

==References==