DEVICE FOR DIRECT CONTROL OF THE MOMENT OF A SYNCHRONOUS ENGINE Russian patent published in 2018 - IPC H02P21/00 H02P21/30 

FIELD: electrical engineering.

SUBSTANCE: invention relates to the field of electrical engineering and can be used to control a three-phase three-level voltage inverter whose control system uses the method of direct motor torque control. Device for direct control of the synchronous motor torque is provided with a block of matching of two groups of basic stress vectors (16), input of which is connected to the output of the preselection block of voltage reference vector (5), and the output is connected to the first input of voltage vector base selection unit (17). Output of the latter is connected to the second input of inverter key management signal generating unit (6) and through the storage unit of previous voltage base vector (18) with its second input. Third input of the voltage vector base selection unit (17) through voltage balancing relay (19) is connected to the fourth output of calculation unit (13). Additional units (16, 17, 18) provide an increase in the efficiency of the inverter due to the rational choice of the basic voltage vector, while the speed of the inverter is not reduced, and when selecting individual vectors even increases. Unit (19) provides a modified voltage balancing on two series-connected capacitors (24, 25) of the DC link of voltage inverter (7). Set of essential features of the claimed device provides an increase in the efficiency of the inverter and its speed.

EFFECT: technical result consists in increasing the efficiency of a three-phase three-level voltage inverter, as well as increasing its speed.

1 cl, 11 dwg