FIELD: electricity.
SUBSTANCE: inductive element with conversion frequency is connected to direct voltage source at zero current and zero voltage on switching elements. In advance, by means of appropriate connection of capacitor elements there created is parallel-series oscillating circuit with inductive element. Resonance frequencies of parallel and in-series circuits are brought near conversion frequency of direct voltage on high and low frequencies side respectively. As a result, voltage amplitude of the first half-wave of aperiodic oscillations created with leakage inductance of inductive element at its switched output, after the inductive element is switched off direct voltage potential, is at the level of opposite connected direct voltage potential.
EFFECT: decreasing the level of electromagnetic interference, improving the shape of current and voltage of inductive element, increasing efficiency of converter, simplifying the control of pulse width modulation.
3 dwg
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