TWO-PHASE AC DRIVE CONTROLLING METHOD USING THE THREE-PHASE BRIDGE INVERTER Russian patent published in 2019 - IPC H02P25/62 H02P27/06 H02P27/10 

FIELD: electrical equipment.

SUBSTANCE: invention relates to the field of electrical equipment, namely to the AC electric drives controlling methods. Two-phase AC drive controlling method using the three-phase bridge inverter is implemented using the frequency converter, containing rectifier, filter and three-phase bridge inverter on fully controlled valves. Motor is made two-phased, filter is made in the form of capacitor, which is connected to the rectifier outputs. Through the current sensor the three-phase bridge inverter first arm output is connected to the two-phase motor first stator winding beginning, which end is connected to the two-phase motor second stator winding beginning, the three-phase bridge inverter second arm output is connected to these windings common connection point, through the second current sensor the three-phase bridge inverter third arm output is connected to the two-phase motor second stator winding end. In each winding forming the smooth current component in the form of the four time sections sequence at each period of the current curve. For this purpose, generating the inverter gate control signals by means of the phase currents relay regulators. To each of them input sending a setting signal, comparing the set and measured currents values, determining the signals mismatching, with threshold value exceeding by which, switching the inverter valves.

EFFECT: invention can be used in the two-phase asynchronous motor frequency control with its supply from the three-phase frequency converter.

1 cl, 6 dwg