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A full-wave rectifier circuit and voltage converter

A full-wave rectification circuit and circuit technology, applied in the direction of conversion equipment without intermediate conversion to AC, etc., can solve the problems of affecting the efficiency of rectification circuits, complex control, high cost, etc.

Active Publication Date: 2018-10-02
EMERSON NETWORK POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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.

Method used

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  • A full-wave rectifier circuit and voltage converter
  • A full-wave rectifier circuit and voltage converter
  • A full-wave rectifier circuit and voltage converter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074] figure 2 Shown is the full-wave rectification circuit provided by Embodiment 1 of the present invention, including capacitor C, inductor L, MOS transistor Q, first rectifier diode D1, second rectifier diode D2, third rectifier diode D3, fourth rectifier diode D4 and Freewheeling diode D5, where:

[0075] The first rectifier diode D1 and the second rectifier diode D2 are connected in series to form the first branch, the third rectifier diode D3 and the fourth rectifier diode D4 are connected in series to form the second branch, and the first branch and the second branch are connected in parallel to form the third branch. The third branch is connected in series with the inductance L and the MOS transistor Q to form a circuit;

[0076] The terminal between the inductor L and the drain of the MOS transistor Q is connected to the anode of the freewheeling diode D5, and the cathode of the freewheeling diode D5 is connected to the anode of the capacitor C;

[0077] The term...

Embodiment 2

[0086] image 3 Shown is the full-wave rectification circuit provided by Embodiment 2 of the present invention, including capacitor C, inductor L, MOS transistor Q, first rectifier diode D1, second rectifier diode D2, third rectifier diode D3, fourth rectifier diode D4 and Freewheeling diode D5, where:

[0087] The first rectifier diode D1 and the second rectifier diode D2 are connected in series to form the first branch, the third rectifier diode D3 and the fourth rectifier diode D4 are connected in series to form the second branch, and the first branch and the second branch are connected in parallel to form the third branch. The third branch is connected in series with the MOS tube Q and the inductor L to form a loop;

[0088] The terminal between the inductor L and the source of the MOS transistor Q is connected to the cathode of the freewheeling diode D5, and the anode of the freewheeling diode D5 is connected to the negative pole of the capacitor C;

[0089]The terminal...

Embodiment 3

[0098] Figure 4 Shown is the full-wave rectification circuit provided by Embodiment 3 of the present invention, compared with that provided by Embodiment 1 of the present invention figure 2 In the full-wave rectification circuit shown, a soft-start unit is added on the live wire terminal IN_L side of the AC input power supply, and the terminal between the first rectifier diode D1 and the second rectifier diode D2 in the first branch is connected to the output of the soft-start unit Terminal, the input terminal of the soft start unit is used as the fire wire terminal IN_L of the AC input power supply.

[0099] The soft-start unit may specifically include a parallel current-limiting diode D6 and a switch S; one end corresponding to the cathode of the current-limiting diode D6 in the soft-start unit is used as the input end of the soft-start unit, and the anode of the current-limiting diode D6 in the soft-start unit corresponds to One end of the soft start unit as the output. ...

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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 rectification circuit and a voltage converter. Background technique [0002] A full-wave rectification circuit in the prior art such as figure 1 As shown, it includes capacitor C, inductor L, switch tube Q, four rectifier diodes D1~D4 and freewheeling diode D5, wherein: two rectifier diodes D1 and D2 of the four rectifier diodes D1~D4 are connected in series to form a branch circuit , the other two rectifier diodes D3, 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 tube Q to form the second branch; the first The branch circuit and the second branch circuit are connected in series to form a loop; the terminals between the two series rectifier diodes D1 and D2 are ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/07
Inventor 倪同
Owner EMERSON NETWORK POWER CO LTD
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