A unit for balancing the voltages of three-phase aircraft inverters supplying large single-phase loads

THE increase in electrically powered and electrically controlled equipment on aircraft has made it necessary, in certain cases, to add sizable single-phase loads to three-phase inverters. The nature of the existing three-phase load, however, placed severe restrictions on the permissible voltage unbalance. The need was felt for a means of maintaining balanced voltages between phases of a three-phase inverter operating under the conditions described above. As this balancer was to be used on aircraft, the further limitations that it be light in weight and efficient in operation were imposed.