INVERTER WITH SPLIT CIRCUIT AND CURRENT-BALANCING REACTOR AND METHOD FOR THIS INVERTER CONTROL ACCORDING TO ALTERNATE SWITCHING ALGORITHM Russian patent published in 2012 - IPC H02M7/53 

FIELD: electricity.

SUBSTANCE: current-balancing reactor with the first and second magnet-connected windings are introduced into the above inverter; terminal of the first winding commencement of current-balancing reactor is connected to positive terminal of the first DC three-phase-link of transistor bridge and terminal of the first winding end is connected to the second DC three-phase-link of transistor bridge; terminal of the second winding commencement of current-balancing reactor is connected to negative terminal of the first DC three-phase-link of transistor bridge and terminal of the second winding end is connected to the second DC three-phase-link of transistor bridge; inverter is equipped with two terminals to be connected to one power supply source, common for the first and second three-phase transistor bridges, at that the first inverter terminal is connected to positive terminal of the first DC three-phase-link of transistor bridge and the second inverter terminal is connected to negative terminal of the first DC three-phase-link of transistor bridge. There's also an version to connect the first inverter terminal to tap of the second winding of current-balancing reactor and the second inverter terminal to tap of the first winding of current-balancing reactor, in this connection taps of each winding are made of any equal number of coils starting from commencement of each winding. The above task is also solved in the following way: the first and second three-phase transistor bridges are controlled by method of pulse-duration modulation at that frequency of reference (e.g. sawtooth wave) signal of the first and second three-phase transistor bridges is the same, according to declared engineering solution at each odd (or even) step the first three-phase transistor bridge is not switched and it generates direct-current voltage Ud, at the same step the second three-phase transistor bridge is switched so that it controls task (Uf - Ud) where: Ud - voltage of power supply source, Uf - output voltage of inverter and at the next step of reference signal tasks for the first and second three-phase transistor bridges are alternated.

EFFECT: reduction of losses in main inverter assemblies with simultaneous reduction of input voltage ripple at power supply of circuit is made from one common power supply source, improvement of energy transformation efficiency, reduction of costs and extension of application field for inverter provided that power supply of circuit is made from one common power supply source.

3 cl, 11 dwg