The invention discloses a push-pull converter with
voltage multiplying
resonance capability. The push-pull converter comprises a primary side push-pull circuit, an
isolation transformer, a
secondary side voltage multiplying circuit and a
secondary side resonance circuit. The push-pull converter has the advantages that on the basis of omitting the filter
inductance, the
secondary side utilizes the
voltage multiplying structure, the
gain of the converter is improved, the goal that the number of turns of the
transformer is reduced to one half of the number of the original turns under the condition with the same
voltage boosting ratio, and the size and the weight of the
transformer are effectively reduced; in addition, a voltage multiplying
capacitor also participates in the
resonance of the secondary side equivalent
leakage inductance of the
transformer, the zero-current shutoff of a secondary side
rectifier diode is realized, the
reverse recovery problem of the
rectifier diode is solved, the loss is reduced, and the integral efficiency of the converter is improved; and meanwhile, the primary side adopts the minimum element number, one
capacitor and one group of
transformer windings are reduced by the secondary side,
miniaturization and light weight of the converter are realized, and in addition, the cost of the converter is reduced.