| 摘要 |
FIELD: electricity. ^ SUBSTANCE: in control method of load of inductive type, which involves at least two switched output voltages supplied with one or several power electronic inverters (11, 12; 34, 35, 36) with specified switch, modulation or digitisation period and used for feed of load phase (3), the signals of appropriate output voltages are differentiated as to shape or offset in time. At that, they are supplied to load through differential device (6) by means of which during each of the above complete periods, at least one of output voltages is kept constant, and thus is not switched. The proposed invention is the device for implementation of this method, which includes one or several power electronic inverters with the specified switch, modulation or digitisation period for supply at least of two switched output voltages, in addition, there introduced is at least one differential device; at that, inverters are equipped with control system which is provided with possibility of providing the condition that signals of the appropriate output voltage are differentiated as to shape and offset in time; at that, during each of the above complete periods, at least one of output voltages is kept constant, and so it is not switched. ^ EFFECT: reducing the switching frequency of inverter, weakening of harmonic current components, and other advantages in comparison to traditional methods used for load control are achieved. ^ 18 cl, 17 dwg |
