FREQUENCY CONVERTER Russian patent published in 2017 - IPC H02M5/458 

FIELD: electricity.

SUBSTANCE: elements and connections between them in the frequency converter are such that they allow to use the same transistors in inverting and braking modes, and also if necessary to produce commutation of the elements of the power part of the inverter branch.

EFFECT: improving the functionality of the product and increasing the reliability of its operation, the frequency converter has enough versatility that allows the work of a voltage inverter in the modes of a two-level voltage inverter or in the three-level voltage inverter mode, and also allows to functionally combine on the same semiconductor switches the modes of the voltage inverter and the braking breaker when braking the electric drive, a high degree of reliability allows the frequency converter to fully operate in operation mode of two-level inverter when the power semiconductor switches of the zero point are failed.

2 cl, 2 dwg