Voltage-vector in three-dimensional space vector modulation based on αβr- Coordinate for four-leg active filter

This paper presents a concept of voltage-vector in three-dimensional space vector modulation for four-leg active filter which are developed based on Euler angle rotation method, and its produces a skewed rod shape consisting of twelve-pairs of asymmetrical tetrahedron nonzero switching vector in which voltage-vector reference is determined by four-pairs of its tetrahedron. Voltage-vector reference and calculation of duty cycle based forms of asymmetrical αβr-coordinate are presented. Simulation results for converter topology provided a new understanding approach of harmonics reduced in 3D SVM which is different from so far.