Engineering and Technology Journal

Abstract

This paper represents new method to determine the optimum switching angles for
Selective Harmonic Eliminated PWM (SHEPWM) inverter. Such switching angles are
defined by a set of nonlinear equations to be solved using the Resultant method. This is
done by first converting these equations that specify the harmonic elimination problem into
an equivalent set of polynomial equations. Then, using the mathematical theory of
Resultants, all solutions to this equivalent problem can be found without the need for any
initial guess. The complete solutions for unipolar SHEPWM switching pattern which
produce the fundamental while not generating specifically chosen harmonics are
investigated.