IJSRP, Volume 8, Issue 9, September 2018 Edition [ISSN 2250-3153]
Chandam Thoisana Singh
This paper presents a design of a compact control circuit for electric furnace, a low voltage power supply (6V unregulated) is utilized to supply the dc Voltages of the system, the circuit is design to produce a fixed selected time frame of 200ms containing 10 complete cycle of main ac voltage. In this time frame on (high) period is 194 ms and off (low) period is 6ms. During the on period a selected short burst of ac cycles can be made to pass through the load by triggering the power triac.