Full wave rectifier circuit and voltage converter

Abstract

The invention discloses a full wave rectifier circuit and a voltage converter. Direct coupling between one pole of a DC output power supply and a zero line of an AC input power supply can be realized by a non-isolated circuit. The full wave rectifier circuit comprises a capacitor, an inductor, a switch tube, a freewheeling diode, and four rectifier diodes. A first rectifier diode and a second rectifier diode are serially connected together to form a first branch, and a third rectifier diode and a fourth rectifier diode are serially connected together to form a second branch, and in addition, the first branch and the second branch can be parallely connected together, and then are serially connected with the inductor and the switch tube to form the circuit. The connecting end between the inductor and the switch tube is connected with the first pole of the capacitor by the freewheeling diode. The connecting end between the first rectifier diode and the second rectifier diode is used as the live line connecting end of the AC input power supply. The connecting end between the third rectifier diode and the fourth rectifier diode is connected with the second pole of the capacitor, and the connected connecting end can be used as the zero line connecting end of the AC input power supply. The two ends of the capacitor are respectively used as the positive connecting end and the negative connecting end of the DC output power supply.

Description

technical field [0001] The invention relates to the technical field of power electronics, in particular to a full-wave rectifier circuit and a voltage converter. Background technique [0002] A full-wave rectifier circuit in the prior art such as figure 1 As shown, it includes a capacitor C, an inductance L, a switch Q, four rectifier diodes D1-D4 and a freewheeling diode D5, wherein: two rectifier diodes D1 and D2 in the four rectifier diodes D1-D4 are connected in series to form a branch , the other two rectifier diodes D3 and D4 are connected in series to form another branch, and the two branches are connected in parallel to form the first branch; after the freewheeling diode D5 is connected in series with the capacitor C, it is connected in parallel with the switch Q to form the second branch; the first branch The branch and the second branch are connected in series to form a loop; the terminal between the two rectifier diodes D1 and D2 connected in series is connected ...

AI Technical Summary

Problems solved by technology

However, adding a transformer to the full-wave rectifier circuit not only has high cost and complicated control, but also affects the efficiency of the rectifier circuit.

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