The Design of a Simple Single Phase Silicon Controlled Rectifier Regulator

A new simple SCR voltage regulator circuit which requires fewer components than most existing circuits which are practical is analyzed. The basic circuitry is applicable to other SCR type systems. An analysis of the control circuitry and total system static loop gain function is presented. The analysis shows that this type control circuit is nonlinear. The power section is analyzed and equations are presented which are needed for design. Exact equations for critical inductance are derived, and a solution to over-voltage problems associated with turn-on and line interruption is included.