METHOD AND APPARATUS FOR CONTROLLING THE AVERAGE OF HALF-TIMES OR THE QUADRATIC AVERAGE OF THE LOAD VOLTAGE

摘要

THE INVENTION CONCERNS AN APPARATUS AND A PROCESS FOR CONTROLLING THE AVERAGE OF THE HALF-ALTERNATIONS OR THE QUADRATIC AVERAGE OF THE VOLTAGE APPLIED TO A LOAD 11. THE APPARATUS INCLUDES SWITCHING MEANS 14 CONNECTED IN SERIES BETWEEN THE ALTERNATIVE CURRENT SOURCE 12 AND LOAD 11, TIMING MEANS 20 WHICH CONTROL THE SWITCHING MEANS SO THAT THEY ALLOW THE FLOW OF CURRENT THROUGH THE LOAD FOR AT LEAST ONE INTERVAL OF TIME DURING EACH ALTERNATION AND MEANS 32, 34 WHICH SAMPLE THE LOAD. VOLTAGE SIZE AT THE LOAD TERMINALS AND APPLY AN ADJ ADJUSTMENT SIGNAL TO THE TIMING MEANS IN ORDER TO ADJUST THE CONDUCTION TIME INTERVAL OF THE SWITCHING MEANS SO THAT THE AVERAGE SIZE OF THE HALF-SWITCHES OR THE AVERAGE SIZE OF THE QUADRATIC THE VOLTAGE APPLIED TO THE LOAD IS APPROXIMATELY EQUAL TO A DESIRED VALUE.