PFC, full bridge and half bridge-based intelligent sine wave voltage conversion circuit

Abstract

The invention discloses a PFC, full bridge and half bridge-based intelligent sine wave voltage conversion circuit, which comprises an input unit, a PFC booster unit, a full-bridge isolation conversion unit and an inverse inverter unit, wherein the full-bridge isolation conversion unit comprises a first switch tube, a second switch tube, a sixth switch tube, a seventh switch tube, a transformer, a first diode, a second diode and a first filter inductor; a source of the sixth switch tube is connected to a first end of a primary winding of the transformer; a drain of the second switch tube is connected to a second end of the primary winding of the transformer; a source of the first switch tube is connected to the second end of the primary winding of the transformer; the drain of the seventh switch tube is connected to the first end of the primary winding of the transformer; a center tap of a secondary winding of the transformer is connected to a back-end ground; the rear end of the first filter inductor and an anode of the second diode are taken as output ends of the full-bridge isolation conversion unit; and a second filter inductor is arranged at the output end of the inverse inverter unit. According to the PFC, full bridge and half bridge-based intelligent sine wave voltage conversion circuit, the PF value and the quality of output voltage can be improved.

Description

technical field [0001] The invention relates to a voltage conversion circuit, in particular to an intelligent sine wave voltage conversion circuit based on PFC, full bridge and half bridge. 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. In practical applications, due to the high-speed switching of the switching tube during the voltage conversion process, there will be a certain high-frequency pulse signal on the output side of the circuit, which will affect the quality of the output vol...

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.

In practical applications, due to the high-speed switching of the switching tube during the voltage conversion process, there will be a certain high-frequency pulse signal on the output side of the circuit, which will affect the quality of the output voltage, so it is difficult to meet the conversion requirements

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