A Universal and Optimized Embedded System to Control Firing Angle of Thyristors with Double-Sided Isolation

摘要

This paper describes the implementation of a double sided isolated, economical, easy to implement and optimized approach to design a digital firing angle control system for silicon controlled rectifiers (SCR) and triacs. Currently designed circuits for this purpose use keypads to take input from user and also use uneconomical ways to implement zero crossing circuitry. This proposed design eliminates the keypad and implements an economical and cost-effective solution that helps industrial as well as home users. The method proposed in this paper is of universal nature and improves the design by applying the double sided isolation and removes the pulse transformer that is not only expensive but also provides the means of magnetic coupling that may be harmful for the controller circuitry. The design proposed in this paper is of universal nature that can be used to control the home as well as industrial loads of either the AC system running either 50 Hz or 60 Hz standard or the DC system. In addition to that, proposed design is fully compatible with 50 Hz and 60 Hz power systems.