Input voltage compensated, microprocessor controlled, power regulator

Claim 1

In an A.C. power regulator with a power input terminal for connection to a source of A.C. input power, an electronic triggerable switch interconnecting the source of A.C. power and a power output terminal connectable with a load, and means for triggering said switch into conduction, the improvement comprising: means responsive to the A.C. power source voltage at said power input terminal for periodically generating a digital load power pulse having a time duration which varies in proportion to the load power. said digital load power pulse generating means including means for generating a pulse during whatever time period that the magnitude of the A.C. power source voltage exceeds a preselected threshold voltage and which substantially varies in direct proportion with the load power, said pulse being generated during whatever time period that the input A.C. power voltage magnitude exceeds a threshold magnitude of approximately one half the nominal maximum magnitude of the input A.C. power voltage occurring approximately between the phase angles of 45 degrees and 135 degrees of positive half waves and between 225 degrees and 315 degrees of negative half waves; and means responsive to the time duration of the digital load power pulse for controlling said triggering means to substantially maintain a selected level of load power despite nominal fluctuations in the source of A.C. power voltage, said controlling means including a microprocessor for directly converting said digital pulse into a binary representation of the load power.