Abstract:
The object of this thesis is to design and construct a microprocessor-conrolled cycloconverter. The microprocessor is used to generate the gating signals for a single phase to ignle phase cycloconverter, the thyristors of which are triggered according to a policy in order to minimize the harmonics of the output current ("optimum firing scheme") for a particular output voltage and frequency. The software for the microprocessor and the hardware for the interface are developed. For the realization of the optimum firing scheme a different approach fromthose in published literature is adopted in this thesis in the sense that no attempt is made to replace all the functions of the conventional control circuitry by the microprocessor, but rather an economical and simple design is tired to be arrived at by combining the advantages of both.
