Method and apparatus for controlling a direct current power source

Claim 1

A DIRECT CURRENT POWER SOURCE COMPRISING A PLURALITY OF SEMICONDUCTING RECTIFIER CIRCUITS COUPLED IN PARALLEL AND CONNECTED TO AN ALTERNATING CURRENT SOURCE OF POWER AND ARRANGED TO PROVIDE DIRECT CURRENT OF HIGH AMPERAGE TO A LOAD, EACH OF SAID PARALLEL RECTIFIER CIRCUITS HAVING A PLURALITY OF SEMICONDUCTING RECTIFIERS THEREIN CONNECTED IN SERIES, INDIVIDUAL COOLING AIR CHANNELS ASSOCIATED WITH EACH OF SAID RECTIFIERS, SAID CHANNELS COMMUNICATING AT THEIR END WITH A COMMON SOURCE OF COOLING FLUID AND DISCHARGING THE COOLING FLUID INTO CONTACT WITH THE RECTIFIER, A FLUID COOLER IN THE PATH OF THE COOLANT FLUID BEYOND THE RECTIFIER AND MEANS FOR CIRCULATING COOLING FLUID FROM SAID COMMON SOURCE THROUGH THE CHANNELS PAST THE RECTIFIER UNIT AND TO THE COOLER IN A PATH OUT OF CONTACT WITH SUBSTANTIALLY ALL OTHER DIODES, AND FOR RETURNING COOLED FLUID TO THE COMMON SOURCE, THE SIZE OF EACH CHANNEL BEING SUBSTANTIALLY THE SAME WHEREBY SUBSTANTIALLY THE SAME AMOUNT OF FLUID CONTENT IS DELIVERED TO EACH INDIVIDUAL RECTIFIER.