DEVICE FOR ELECTRIC POWER TRANSFORMATION Russian patent published in 2018 - IPC H02M1/34 H02M3/335 

FIELD: conversion equipment.

SUBSTANCE: invention relates to conversion equipment. Electric power transformation device comprises a transistor for electric rower transformation; diode connected in series with a transistor; smoothing capacitor, connected in parallel with the transistor and the diode, while the smoothing capacitor is configured to eliminate the ripple generated by the transistor; and damper circuit, comprising a damper capacitor, inductance element and resistor. Damping capacitor, inductance element and resistor are connected to each other in series, with the damping circuit connected in parallel with the smoothing capacitor. Capacity of the damper capacitor, the inductance of the inductance element and the resistor parameters are set in such a way, that the resonant frequency of the damper circuit coincides with the frequency of the "ringing" of the transistor, while the capacitance of the damper capacitor is set in such a way as to equal the contact potential of the transistor, the inductance of the inductance element is set in such a way, that the inductance of the primary circuit is equal to the inductance of the secondary circuit, and the resistor parameters are set in such a way that the impedance of the primary circuit at the resonant frequency is less, than the impedance of the second circuit at the resonant frequency, the first circuit includes a damper circuit and a smoothing capacitor, and the second circuit includes a transistor and a smoothing capacitor.

EFFECT: technical result is the reduction of voltage and current fluctuations after switching the transistor.

1 cl, 7 dwg