SOURCE WITH RECUPERATION OF POWER OF HIGHER HARMONICS Russian patent published in 2022 - IPC H02M7/04 H02M7/44 

FIELD: electrical engineering.

SUBSTANCE: invention relates to electrical engineering and can be used as an alternating current source with high efficiency and sinusoidal voltage shape. AC source with higher harmonic power recuperation contains in-series connected: storage battery, DC buses, inverter and three-phase filter, as well as smoothing polar capacitor installed between DC buses. Three-phase filter comprises LC circuits for harmonics and load connection terminals. Filter of each phase contains matching transformer. Primary winding of the matching transformer is connected between the corresponding output of the inverter and the load connection terminal, and the secondary winding is connected to the unit of series-connected LC-circuits of harmonics. Each of the circuits contains parallel connected capacitor and primary winding of double-winding choke. Secondary winding of the double-winding throttle is connected to the input of the corresponding rectifier. Rectifier output is connected to DC buses. Inverter generates rectangular voltage. Filter unit contains number of LC-circuits for odd harmonics with numbers from 3rd to 39th. Double-winding chokes are made according to transformer circuit and are made with different transformation ratios. Transformation ratios are determined by the ratio of the effective value of the phase voltage of the inverter for each harmonic to the effective value of the phase voltage, which depends on the battery charging voltage.

EFFECT: technical result of invention is provision of accumulator battery recharging due to power of all higher harmonics up to 39th inclusive.

1 cl, 1 dwg