Intelligent half-bridge correction wave voltage conversion circuit based on PFC interleaved flyback

Abstract

The invention discloses an intelligent half-bridge correction wave voltage conversion circuit based on PFC interleaved flyback. The intelligent half-bridge correction wave voltage conversion circuit comprises an input rectifier and filter unit, a PFC booster unit, an interleaved flyback isolation transformation unit, a DC filtering unit and an inverter phase inversion unit. The interleaved flyback isolation transformation unit comprises a first switch tube, a second switch tube, a first transformer, a second transformer, a first diode, a second diode, a third diode and a fourth diode, wherein the second end of a primary winding of the first transformer is connected to the drain electrode of the first switch tube; the second end of a primary winding of the second transformer is connected to the drain electrode of the second switch tube; the first end of a secondary winding of the first transformer is connected to the anode of the third diode; the second end of the secondary winding of the second transformer is connected to the cathode of the fourth diode; and the cathode of the third diode and the anode of the fourth diode serve as the output end of the interleaved flyback isolation transformation unit. The intelligent half-bridge correction wave voltage conversion circuit can reduce ripples in the circuit, can simplify circuit structure and reduce circuit cost.

Description

technical field [0001] The invention relates to a voltage conversion circuit, in particular to an intelligent half-bridge modified wave voltage conversion circuit based on PFC interleaved flyback. Background technique [0002] In the prior art, the intelligent buck-boost conversion device from AC to AC is also called a travel plug-in strip. In this device, the voltage conversion circuit is the key circuit, which is a circuit that can realize AC-AC conversion. In the AC-AC conversion, the function of realizing buck-boost and stabilizing voltage and frequency. However, most of the current AC-AC portable equipment market is a non-isolated topology circuit with low PF value, low output voltage quality, and poor safety and reliability. Especially in the voltage conversion process, more ripple interference will be generated, which will affect the voltage quality. In addition, the existing modified wave voltage conversion circuit has defects such as complex circuit structure, slo...

AI Technical Summary

Problems solved by technology

However, most of the current AC-AC portable equipment market is a non-isolated topology circuit with low PF value, low output voltage quality, and poor safety and reliability.

Especially in the process of voltage conversion, more ripple interference will be generated, which will affect the voltage quality

In addition, the existing modified wave voltage conversion circuit has defects such as complex circuit structure, slow response speed, and high cost.

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