Voltage regulator for AC single phase and three phase systems

Claim 1

A voltage regulator for alternating current single phase and three phase systems which comprises a. an input terminal, b. a series injection transformer having primary and secondary windings with said secondary winding being in series with said input terminal, c. an output transformer with tertiary windings which include i. a primary winding in series with said secondary winding of said series injetion transformer, ii. a system output AC voltage winding, iii. and a multi-tap winding, d. a switch matrix which receives its source voltage from said multi-tap winding, e. and control means including a microprocessor for receiving the output voltage from said system output AC voltage winding and for driving said switch matrix, i. said control means includes a peak and hold circuit which stores the peak voltage every half cycle, f. said switch matrix applying the proper voltage level and phase to the primary of said series injection transformer to effect voltage regulation.