ADJUSTABLE VALVE-TYPE ELECTRIC MOTOR FOR SUBMERSIBLE PUMPS Russian patent published in 2000 - IPC

FIELD: electric drives of submersible pump units. SUBSTANCE: motor has electromechanical converter with three phase windings and inductor, inverter, logic control unit, three comparators, three filters, and three integrating circuits. Newly introduced are output transformer, secondary power supply, three-phase voltage divider whose first, second, and third outputs are connected to inputs of first, second, and third filters, respectively. First, second, and third outputs of inverter are connected to first, second, and third inputs of voltage divider as well as to first, second, and third inputs of output transformer. First, second, and third outputs of output transformer are connected to first, second, and third phase windings of electromechanical converter, respectively. Common lead of secondary power supply is connected to interconnected leads of mentioned integrating circuits and to common lead of voltage divider and its potential leads are connected to power circuits of mentioned comparators, respectively. EFFECT: provision for connecting three-phase converter spaced through long distance from inverter by means of three-wire cable. 4 cl, 25 dwg