Title: Improvements in Microprocessor-Controlled Triac Cycloconverters
Abstract: There are advantages accruing from using triacs in the power circuits of cycloconverters for small and medium drives and from adopting microprocessor control as a replacement for the conventional analogue control circuits. Although an experimental system has been successfully implemented, there has arisen a need to resolve the apparent conflict between the use of a small number of interrupts applied to the microprocessor and a smooth current crossover. A related but distinct problem that calls for attention is the selection of the current zero to minimise unnecessary current distortion. The development of software techniques to improve the waveform synthesis of the microprocessor-controlled triac cycloconverter forms the subject of the present discussion.