UNIPOLAR LOW-FREQUENCY RESONANT CONVERTER WITH HIGHER FREQUENCY LINK AND METHOD TO GENERATE LOW-FREQUENCY OUTPUT CURRENT Russian patent published in 2013 - IPC H02M5/453 H02M7/487 H02M7/523 H05B6/04 H05B6/06 

FIELD: electricity.

SUBSTANCE: converter with a higher frequency link comprises a single-phase inverter bridge with back-to-back diodes, a transformer, a rectifier, two control systems, one of which controls operation of inverter transistors. The rectifier is arranged as diode with a zero point and is loaded to the resonant circuit. In parallel to the resonant circuit, a thyristor is connected, which is joined to the second control system. When controlling the converter, an interval t₁ of transistor control pulses, where a positive half-wave of current is generated in a load, is alternated with an interval t₂ of a zero pause, in process of which with the help of the first control system all transistors of the inverter are closed, with the help of the second control system the thyristor connected in parallel to the resonant circuit, is unlocked, providing for the mode of double conductivity of inductor current and generation of the negative half-wave of load current. The interval of inverter control pulses supply is always lower than the interval of zero pause, in which the thyristor is closed (t₁<t).

EFFECT: reduced number of thyristors and lower voltages at thyristors and diodes to double output voltage of a transformer due to provision of inductor current continuity.

4 cl, 2 dwg