For the ground of ways of increase energy of efficiency of thyristor electric drive of direct current of it is necessary to decide such tasks: 1) to develop the method of determination of reactive constituent of current motor; 2) to decide the task of optimum inductance of circle of armature at maximum of efficiency and a maximum of power-factor; 3) to conduct research of influencing of the braking regime motor on a power-factor and indexes of quality of electric power.
