Low-ripple rectification voltage doubling circuit

By combining a half-wave voltage multiplier circuit with a bridge rectifier circuit, a low-ripple, high-voltage output is achieved, solving the problems of weak load capacity and large ripple in existing voltage multiplier circuits, and reducing circuit complexity and cost.

CN224021631UActive Publication Date: 2026-03-20SHANDONG LASER SOURCE TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-04-02
Publication Date
2026-03-20

AI Technical Summary

Technical Problem

Existing voltage multiplier circuits suffer from weak load capacity, large output voltage ripple, and high cost. Furthermore, bridge rectifier circuits do not have the function of multiplying voltage, and transformer step-up increases losses and costs.

Method used

A low-ripple rectifier voltage multiplier circuit is adopted, which combines a half-wave voltage multiplier circuit with a bridge rectifier circuit. Through the organic combination of a single-stage voltage multiplier module, a two-stage voltage multiplier module and a bridge rectifier module, voltage boosting and ripple reduction are achieved.

Benefits of technology

It achieves high voltage and low ripple output, reduces circuit structure complexity and component cost, improves economic efficiency, and reduces the amount of filter capacitors used.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a low-ripple rectification voltage doubling circuit, which relates to the field of voltage doubling rectification and comprises a first-stage voltage doubling module, a second-stage voltage doubling module, a third-stage voltage doubling module and a fourth-stage voltage doubling module, the second-stage voltage multiplying module is used for carrying out voltage multiplying on the input negative half-cycle voltage; the transformer is used for connecting outputs of the first-stage voltage-multiplying module and the second-stage voltage-multiplying module in parallel and converting an output result into high-voltage electricity; the bridge rectifier module is used for rectifying the high-voltage electricity and outputting direct-current voltage; one end of the primary voltage-multiplying module is respectively connected with one end of the secondary voltage-multiplying module, one end of the transformer and one end of the bridge rectifier module, and the other end of the secondary voltage-multiplying module is connected with the other end of the bridge rectifier module and the other end of the transformer. The two groups of half-wave voltage doubling circuits provided by the utility model are applied on the circuit in a staggered manner, the circuit structure is simple, the cost is low, the economic benefit is high, two groups of pulse voltages with complementary phases are output, and the output voltage ripples are greatly reduced.
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Description

Technical Field

[0001] This utility model relates to the field of voltage multiplier rectification, specifically to a low-ripple voltage multiplier rectification circuit. Background Technology

[0002] A voltage doubler circuit is a circuit design designed to boost an input alternating current (AC) voltage to a higher direct current (DC) output voltage. Primarily composed of diodes and capacitors, voltage doublers utilize rectification and energy storage principles to increase voltage. They are commonly used in applications requiring higher voltages, such as power supplies and electronic devices.

[0003] Currently, the most widely used voltage multiplier circuits are mostly half-wave voltage multiplier circuits. They have outstanding advantages such as simple circuit structure and high cost performance, but they have obvious disadvantages such as weak load capacity and large output voltage ripple. Bridge rectifier circuits do not have the function of multiplying voltage. If a transformer is used to step up the voltage, the transformer loss and cost will increase significantly, and it is impossible to reduce the size and cost of components.

[0004] No effective solutions have yet been proposed to address the problems in the relevant technologies. Utility Model Content

[0005] In view of the problems in the related technologies, this utility model proposes a low-ripple rectifier voltage multiplier circuit to overcome the above-mentioned technical problems existing in the existing related technologies.

[0006] Therefore, the specific technical solution adopted by this utility model is as follows:

[0007] A low-ripple rectifier voltage multiplier circuit includes:

[0008] A single-stage voltage multiplier module used to multiply the positive half-cycle voltage of the input;

[0009] A two-stage voltage multiplier module used to double the negative half-cycle voltage of the input;

[0010] A transformer used to connect the outputs of the first-stage voltage multiplier module and the second-stage voltage multiplier module in parallel, and to convert the output into high-voltage electricity;

[0011] A bridge rectifier module used to rectify high-voltage electricity and output DC voltage;

[0012] One end of the first-stage voltage multiplier module is connected to one end of the second-stage voltage multiplier module, one end of the transformer, and one end of the bridge rectifier module. The other end of the second-stage voltage multiplier module is connected to the other end of the bridge rectifier module and the other end of the transformer.

[0013] Preferably, the first-stage voltage multiplier module includes capacitor C1, capacitor C3, diode D1, and diode D2; one end of capacitor C1 is connected to one end of diode D1, and the other end of capacitor C1 is connected to one end of the bridge rectifier module and one end of diode D2 respectively; the other end of diode D1 is connected to the other end of diode D2 and one end of capacitor C3 respectively, and the other end of capacitor C3 is connected to one end of the transformer and one end of the second-stage voltage multiplier module respectively.

[0014] Preferably, the secondary voltage multiplier module includes capacitor C4, capacitor C5, diode D4, and diode D5; one end of capacitor C4 is connected to one end of capacitor C3, one end of diode D4, one end of transformer, and one end of diode D5 respectively; the other end of capacitor C4 is connected to one end of diode D5 and one end of bridge rectifier module respectively; the other end of diode D4 is connected to the other end of diode D5 and one end of capacitor C5 respectively; and the other end of capacitor C5 is connected to one end of transformer.

[0015] Preferably, the bridge rectifier module includes diodes D7, D8, D9, and D10; one end of diode D7 is connected to one end of diode D2 and one end of capacitor C1, and the other end of diode D7 is connected to one end of diode D8, and the other end of diode D8 is connected to one end of diode D5 and one end of capacitor C4; one end of diode D9 is connected to one end of diode D4, one end of capacitor C4, and one end of capacitor C3, and the other end of diode D9 is connected to one end of diode D10, and the other end of diode D10 is connected to one end of capacitor C5, one end of transformer, one end of capacitor C1, and one end of diode D1.

[0016] Preferably, the first-stage voltage multiplier module further includes diode D3 and capacitor C2; one end of diode D3 is connected to one end of diode D2 and one end of capacitor C1 respectively, the other end of diode D3 is connected to one end of diode D7 and one end of capacitor C2 respectively, and the other end of capacitor C2 is connected to one end of diode D2, one end of diode D1 and one end of capacitor C3 respectively.

[0017] Preferably, the secondary voltage multiplier module further includes diode D6 and capacitor C6; one end of diode D6 is connected to one end of diode D5 and one end of capacitor C4, and the other end of diode D6 is connected to one end of diode D8 and one end of capacitor C6 respectively; the other end of capacitor C6 is connected to one end of capacitor C5, one end of diode D4 and one end of diode D5 respectively.

[0018] The beneficial effects of this utility model are as follows:

[0019] 1. This utility model proposes a low-ripple rectifier voltage multiplier circuit, which organically combines a half-wave voltage multiplier circuit with a bridge rectifier circuit, solving the problem of high voltage and low ripple output, and achieving the requirement of simple circuit structure to a greater extent.

[0020] 2. The two sets of half-wave voltage multiplier circuits proposed in this utility model are used alternately in the circuit. The circuit structure is simple, the cost is low, and the economic benefits are high. The output has two sets of complementary pulse voltages, which greatly reduces the output voltage ripple. At the same time, the use of filter capacitor capacity is reduced. It is also organically combined with the bridge rectifier circuit to output DC voltage, which reduces the size and cost of components. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a block diagram of a low-ripple rectifier voltage multiplier circuit according to an embodiment of the present utility model;

[0023] Figure 2 This is a circuit diagram based on Embodiment 1 of the present invention;

[0024] Figure 3 This is a circuit diagram based on Embodiment 2 of this utility model.

[0025] In the picture:

[0026] 1. First-stage voltage multiplier module; 2. Second-stage voltage multiplier module; 3. Transformer; 4. Bridge rectifier module. Detailed Implementation

[0027] To further illustrate the various embodiments, the present invention provides accompanying drawings, which are part of the disclosure of the present invention. These drawings are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, those skilled in the art should be able to understand other possible implementation methods and the advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are usually used to represent similar components.

[0028] According to an embodiment of the present invention, a low-ripple rectifier voltage multiplier circuit is provided.

[0029] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments. Example 1

[0030] like Figure 1 and Figure 2 The diagram shown is a structural schematic of a low-ripple rectifier voltage multiplier circuit according to a preferred embodiment of the present invention. The low-ripple rectifier voltage multiplier circuit of this embodiment includes:

[0031] A single-stage voltage multiplier module 1 for multiplying the positive half-cycle voltage of the input;

[0032] A two-stage voltage multiplier module 2 is used to double the input negative half-cycle voltage;

[0033] Transformer 3 is used to connect the outputs of the first-stage voltage multiplier module 1 and the second-stage voltage multiplier module 2 in parallel, and convert the output results into high-voltage electricity;

[0034] Bridge rectifier module 4 is used to rectify high-voltage electricity and output DC voltage;

[0035] One end of the first-stage voltage multiplier module 1 is connected to one end of the second-stage voltage multiplier module 2, one end of the transformer 3, and one end of the bridge rectifier module 4, respectively. The other end of the second-stage voltage multiplier module 2 is connected to the other end of the bridge rectifier module 4 and the other end of the transformer 3.

[0036] In one embodiment, the first-stage voltage multiplier module 1 includes capacitor C1, capacitor C3, diode D1, and diode D2; one end of capacitor C1 is connected to one end of diode D1, and the other end of capacitor C1 is connected to one end of bridge rectifier module 4 and one end of diode D2 respectively; the other end of diode D1 is connected to the other end of diode D2 and one end of capacitor C3 respectively, and the other end of capacitor C3 is connected to one end of transformer 3 and one end of second-stage voltage multiplier module 3 respectively.

[0037] In one embodiment, the secondary voltage multiplier module 2 includes capacitor C4, capacitor C5, diode D4, and diode D5; one end of capacitor C4 is connected to one end of capacitor C3, one end of diode D4, one end of transformer, and one end of diode D5, respectively; the other end of capacitor C4 is connected to one end of diode D5 and one end of bridge rectifier module 4, respectively; the other end of diode D4 is connected to the other end of diode D5 and one end of capacitor C5, respectively; and the other end of capacitor C5 is connected to one end of transformer 3.

[0038] In one embodiment, the bridge rectifier module 4 includes diodes D7, D8, D9, and D10; one end of diode D7 is connected to one end of diode D2 and one end of capacitor C1, and the other end of diode D7 is connected to one end of diode D8, and the other end of diode D8 is connected to one end of diode D5 and one end of capacitor C4; one end of diode D9 is connected to one end of diode D4, one end of capacitor C4, and one end of capacitor C3, and the other end of diode D9 is connected to one end of diode D10, and the other end of diode D10 is connected to one end of capacitor C5, one end of transformer 3, one end of capacitor C1, and one end of diode D1.

[0039] It needs to be explained that the circuit consists of a first half-wave voltage multiplier circuit (i.e., first-stage voltage multiplier module 1) composed of diodes D1, D2, C1, and C3; a second half-wave voltage multiplier circuit (i.e., second-stage voltage multiplier module 2) composed of diodes D4, D5, C4, and C5; and a bridge rectifier circuit (i.e., bridge rectifier module 4) composed of diodes D7, D8, D9, and D10. The two half-wave voltage multiplier circuits are connected in parallel to the output of transformer T1 with a 180-degree phase difference. This circuit is then combined with the bridge rectifier circuit to form a complete half-wave voltage multiplier circuit. This circuit can be a two-stage or multi-stage voltage multiplier circuit. It is responsible for converting the input low-voltage electricity into high-voltage electricity. The high-voltage electricity is then rectified by the bridge rectifier circuit to output a DC voltage. Example 2

[0040] like Figure 1 and Figure 3 As shown, this is a schematic diagram of a low-ripple rectifier voltage multiplier circuit according to another preferred embodiment of the present invention. The low-ripple rectifier voltage multiplier circuit of this embodiment is based on the first embodiment:

[0041] The first-level voltage multiplier module 1 also includes a diode D3 and a capacitor C2; one end of diode D3 is connected to one end of diode D2 and one end of capacitor C1 respectively, the other end of diode D3 is connected to one end of diode D7 and one end of capacitor C2 respectively, and the other end of capacitor C2 is connected to one end of diode D2, one end of diode D1 and one end of capacitor C3 respectively.

[0042] Specifically, the secondary voltage multiplier module 2 also includes diode D6 and capacitor C6; one end of diode D6 is connected to one end of diode D5 and one end of capacitor C4, and the other end of diode D6 is connected to one end of diode D8 and one end of capacitor C6 respectively; the other end of capacitor C6 is connected to one end of capacitor C5, one end of diode D4 and one end of diode D5 respectively.

[0043] It should be explained that the low-ripple rectifier voltage multiplier circuit described in Embodiment 2 includes a first half-wave voltage multiplier circuit composed of diodes D1, D2, D3, capacitors C1, C2, and C3; a second half-wave voltage multiplier circuit composed of diodes D4, D5, D6, capacitors C4, C5, and C6; and a bridge rectifier circuit composed of diodes D7, D8, D9, and D10. The two half-wave voltage multiplier circuits are connected in parallel to the output of transformer T1 with a phase difference of 180 degrees, and are then organically combined with the bridge rectifier circuit. The half-wave voltage multiplier circuit can be a two-stage voltage multiplier circuit or a multi-stage voltage multiplier circuit. This circuit is responsible for converting the input low-voltage electricity into high-voltage electricity. The high-voltage electricity is rectified by the bridge rectifier circuit to output DC voltage.

[0044] based on Figure 2 and Figure 3 Both the circuit structures in Embodiment 2 and Embodiment 1 can achieve the desired function.

[0045] In summary, by utilizing the above-mentioned technical solution of this utility model, a low-ripple rectifier voltage multiplier circuit is proposed. This circuit organically combines a half-wave voltage multiplier circuit with a bridge rectifier circuit, solving the problem of high-voltage, low-ripple output and achieving a simpler circuit structure to a greater extent. The two sets of half-wave voltage multiplier circuits proposed in this utility model are interleaved in the circuit, resulting in a simple circuit structure, low cost, and high economic efficiency. The output of two sets of complementary pulse voltages significantly reduces output voltage ripple, while also reducing the use of filter capacitors. Furthermore, the organic combination with the bridge rectifier circuit outputs DC voltage, reducing the size and cost of components.

[0046] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0047] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A low-ripple rectifier voltage multiplier circuit, characterized in that, include: A single-stage voltage multiplier module used to multiply the positive half-cycle voltage of the input; A two-stage voltage multiplier module used to double the negative half-cycle voltage of the input; A transformer used to connect the outputs of the first-stage voltage multiplier module and the second-stage voltage multiplier module in parallel, and to convert the output results into high-voltage electricity; A bridge rectifier module used to rectify high-voltage electricity and output DC voltage; One end of the first-stage voltage multiplier module is connected to one end of the second-stage voltage multiplier module, one end of the transformer, and one end of the bridge rectifier module, respectively. The other end of the second-stage voltage multiplier module is connected to the other end of the bridge rectifier module and the other end of the transformer.

2. The low-ripple rectifier voltage multiplier circuit according to claim 1, characterized in that, The first-stage voltage multiplier module includes capacitor C1, capacitor C3, diode D1, and diode D2; One end of the capacitor C1 is connected to one end of the diode D1, and the other end of the capacitor C1 is connected to one end of the bridge rectifier module and one end of the diode D2, respectively. The other end of diode D1 is connected to the other end of diode D2 and one end of capacitor C3, and the other end of capacitor C3 is connected to one end of transformer and one end of secondary voltage multiplier module.

3. The low-ripple rectifier voltage multiplier circuit according to claim 1, characterized in that, The secondary voltage multiplier module includes capacitor C4, capacitor C5, diode D4, and diode D5; One end of capacitor C4 is connected to one end of capacitor C3, one end of diode D4, one end of transformer, and one end of diode D5, respectively; the other end of capacitor C4 is connected to one end of diode D5 and one end of bridge rectifier module, respectively. The other end of diode D4 is connected to the other end of diode D5 and one end of capacitor C5, and the other end of capacitor C5 is connected to one end of transformer.

4. The low-ripple rectifier voltage multiplier circuit according to claim 1, characterized in that, The bridge rectifier module includes diodes D7, D8, D9, and D10; One end of diode D7 is connected to one end of diode D2 and one end of capacitor C1, the other end of diode D7 is connected to one end of diode D8, and the other end of diode D8 is connected to one end of diode D5 and one end of capacitor C4. One end of diode D9 is connected to one end of diode D4, one end of capacitor C4, and one end of capacitor C3, respectively. The other end of diode D9 is connected to one end of diode D10, and the other end of diode D10 is connected to one end of capacitor C5, one end of transformer, one end of capacitor C1, and one end of diode D1, respectively.

5. A low-ripple rectifier voltage multiplier circuit according to claim 2, characterized in that, The first-stage voltage multiplier module also includes diode D3 and capacitor C2; One end of diode D3 is connected to one end of diode D2 and one end of capacitor C1, and the other end of diode D3 is connected to one end of diode D7 and one end of capacitor C2. The other end of capacitor C2 is connected to one end of diode D2, one end of diode D1 and one end of capacitor C3.

6. The low-ripple rectifier voltage multiplier circuit according to claim 3, characterized in that, The secondary voltage multiplier module also includes diode D6 and capacitor C6; One end of diode D6 is connected to one end of diode D5 and one end of capacitor C4, and the other end of diode D6 is connected to one end of diode D8 and one end of capacitor C6, respectively. The other end of capacitor C6 is connected to one end of capacitor C5, one end of diode D4, and one end of diode D5, respectively.