AC chopping technique with phase and voltage control

AC voltage chopping techniques used in AC voltage controllers represent an attractive alternative to phase angle controlled techniques. Moreover, using microprocessors to determine switching instances makes it possible to generate an output voltage with better characteristics. This paper describes a novel chopping technique in which both the amplitude and the phase angle of the fundamental component of the output voltage can be controlled. Detailed analysis of the proposed technique is presented. Experimental results verifying the theoretical results are also given.