阅读说明：本技术 一种电压调节电路及调压器 (Voltage regulating circuit and voltage regulator ) 是由 王山伟 刘中伟 史耀华 卢鹏 于 2020-05-11 设计创作，主要内容包括：本发明实施例提供一种电压调节电路及调压器,用以同时实现升压和降压的功能,简化电路结构、降低成本,且缩小调压器体积。所述电路包括：第一电压输入端、第二电压输入端、第一电压输出端、第二电压输出端、以及并联连接的第一开关管桥臂、电容支路和第二开关管桥臂,电容支路包括串联连接的第一电容和第二电容,第二电压输入端与第二电压输出端连接,第二电压输入端与第一电压输出端之间串联连接有第三电容和第四电容,第一电压输入端分别连接第一节点和第二节点,第二电压输入端和第三电容的连接点与第三节点之间连接有第一电感,第一电压输出端和第四电容的连接点与第四节点之间连接有第二电感。(The embodiment of the invention provides a voltage regulating circuit and a voltage regulator, which are used for simultaneously realizing the functions of boosting and reducing voltage, simplifying the circuit structure, reducing the cost and reducing the volume of the voltage regulator. The circuit comprises: the capacitor branch comprises a first capacitor and a second capacitor which are connected in series, the second voltage input end is connected with the second voltage output end, a third capacitor and a fourth capacitor are connected between the second voltage input end and the first voltage output end in series, the first voltage input end is connected with a first node and a second node respectively, a first inductor is connected between the connection point of the second voltage input end and the third capacitor and the third node, and a second inductor is connected between the connection point of the first voltage output end and the fourth capacitor and the fourth node.)

1. A voltage regulation circuit, comprising: the capacitive load circuit comprises a first voltage input end, a second voltage input end, a first voltage output end, a second voltage output end, and a first switching tube bridge arm, a capacitive branch and a second switching tube bridge arm which are connected in parallel, wherein the capacitive branch comprises a first capacitor and a second capacitor which are connected in series, the second voltage input end is connected with the second voltage output end, a third capacitor and a fourth capacitor are connected in series between the second voltage input end and the first voltage output end, the first voltage input end is respectively connected with a first node and a second node, a first inductor is connected between the connection point of the second voltage input end and the third capacitor and the third node, and a second inductor is connected between the connection point of the first voltage output end and the fourth capacitor and the fourth node;

the first node is a middle node between the first capacitor and the second capacitor, the second node is a middle node between the third capacitor and the fourth capacitor, the third node is a middle node between two switching tubes connected in series in the first switching tube bridge arm, and the fourth node is a middle node between two switching tubes connected in series in the second switching tube bridge arm.

2. The circuit of claim 1, wherein the first switch tube bridge arm comprises a first switch tube and a second switch tube connected in series.

3. The circuit of claim 2, wherein a diode is connected between the source and the drain of the first switch tube in anti-parallel, and a diode is connected between the source and the drain of the second switch tube in anti-parallel.

4. The circuit of claim 1, wherein the second switch tube bridge arm comprises a third switch tube and a fourth switch tube connected in series.

5. The circuit as claimed in claim 4, wherein a diode is connected between the source and the drain of the third switching tube in an anti-parallel manner, and a diode is connected between the source and the drain of the fourth switching tube in an anti-parallel manner.

6. The circuit of claim 1, further comprising: and one end of the third switching tube bridge arm is connected with the fourth node, and the other end of the third switching tube bridge arm is connected with a connecting line of the first node and the second node.

7. The circuit of claim 6, wherein the third switching tube bridge arm comprises a fifth switching tube and a sixth switching tube connected in series, a drain of the fifth switching tube is connected to a connection line between the first node and the second node, a source of the fifth switching tube is connected to a source of the sixth switching tube, and a drain of the sixth switching tube is connected to the fourth node.

8. The circuit as claimed in claim 6, wherein a diode is connected between the source and the drain of the fifth switching tube in anti-parallel, and a diode is connected between the source and the drain of the sixth switching tube in anti-parallel.

9. The circuit of claim 1 wherein the second voltage input is connected to the neutral line of alternating current.

10. A voltage regulator, characterized in that it comprises a voltage regulation circuit according to any one of claims 1-9.

Technical Field

The invention relates to the field of alternating-current voltage regulators, in particular to a voltage regulating circuit and a voltage regulator.

Background

The voltage regulator is generally used in scientific research, experiments, detection, heating and heat preservation, soft start and other occasions, and is used for providing different voltages for a load and enabling the voltages to be linearly regulated under the power-on condition.

Disclosure of Invention

The embodiment of the invention provides a voltage regulating circuit and a voltage regulator, which are used for simultaneously realizing the functions of boosting and reducing voltage, simplifying the circuit structure, reducing the cost and reducing the volume of the voltage regulator.

In a first aspect, an embodiment of the present invention provides a voltage regulation circuit, including: the capacitor branch circuit comprises a first capacitor and a second capacitor which are connected in series, the second voltage input end is connected with the second voltage output end, a third capacitor and a fourth capacitor are connected between the second voltage input end and the first voltage output end in series, the first voltage input end is respectively connected with a first node and a second node, a first inductor is connected between the connection point of the second voltage input end and the third capacitor and the third node, and a second inductor is connected between the connection point of the first voltage output end and the fourth capacitor and the fourth node;

the first node is a middle node of a first capacitor and a second capacitor, the second node is a middle node of a third capacitor and a fourth capacitor, the third node is a middle node of two switching tubes connected in series in a first switching tube bridge arm, and the fourth node is a middle node of two switching tubes connected in series in a second switching tube bridge arm.

The voltage regulation circuit provided by the embodiment of the invention comprises: the capacitor branch comprises a first capacitor and a second capacitor which are connected in series, the second voltage input end is connected with the second voltage output end, a third capacitor and a fourth capacitor are connected between the second voltage input end and the first voltage output end in series, the first voltage input end is connected with a first node and a second node respectively, a first inductor is connected between the connection point of the second voltage input end and the third capacitor and the third node, and a second inductor is connected between the connection point of the first voltage output end and the fourth capacitor and the fourth node. Compared with the prior art, the voltage boosting and reducing function can be realized simultaneously, and the voltage regulating range is wide; the device has a voltage harmonic compensation function, and can improve the sine degree of the alternating voltage; meanwhile, the circuit has simple topology, few devices and low cost, and can further reduce the volume of the voltage regulator.

In one possible embodiment, the first switching tube bridge arm comprises a first switching tube and a second switching tube connected in series.

In one possible embodiment, a diode is connected between the source and the drain of the first switching tube in anti-parallel, and a diode is connected between the source and the drain of the second switching tube in anti-parallel.

In one possible embodiment, the second switching tube bridge arm includes a third switching tube and a fourth switching tube connected in series.

In one possible implementation, a diode is connected between the source and the drain of the third switching tube in an anti-parallel manner, and a diode is connected between the source and the drain of the fourth switching tube in an anti-parallel manner.

In one possible implementation, the circuit further includes: and one end of the third switching tube bridge arm is connected with the fourth node, and the other end of the third switching tube bridge arm is connected with a connecting line of the first node and the second node.

In a possible implementation manner, the third switching tube bridge arm includes a fifth switching tube and a sixth switching tube connected in series, a drain of the fifth switching tube is connected to a connection line of the first node and the second node, a source of the fifth switching tube is connected to a source of the sixth switching tube, and a drain of the sixth switching tube is connected to the fourth node.

In one possible implementation, a diode is connected between the source and the drain of the fifth switching tube in an anti-parallel manner, and a diode is connected between the source and the drain of the sixth switching tube in an anti-parallel manner.

In one possible embodiment, the second voltage input is connected to the neutral line of the alternating current.

In a second aspect, an embodiment of the present invention further provides a voltage regulator, including the voltage regulating circuit according to the first aspect of the embodiment of the present invention.

Drawings

The above and other objects, features and advantages of exemplary embodiments of the present invention will become readily apparent from the following detailed description read in conjunction with the accompanying drawings. Several embodiments of the invention are illustrated by way of example, and not by way of limitation, in the figures of the accompanying drawings and in which:

fig. 1 is a schematic structural diagram of an energy absorption circuit according to an embodiment of the present invention;

fig. 2 is a schematic diagram of a topology of an energy absorption circuit according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of an energy absorption circuit according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of another energy absorption circuit provided by an embodiment of the present invention;

FIG. 5 is a schematic diagram of another energy absorption circuit provided by an embodiment of the present invention;

FIG. 6 is a schematic diagram of another energy absorption circuit according to an embodiment of the present invention;

FIG. 7 is a schematic diagram of another energy absorption circuit according to an embodiment of the present invention;

FIG. 8 is a schematic diagram of yet another energy absorption circuit according to an embodiment of the present invention;

FIG. 9 is a schematic diagram of yet another energy absorption circuit according to an embodiment of the present invention;

FIG. 10 is a schematic diagram of yet another energy absorption circuit according to an embodiment of the present invention;

FIG. 11 is a schematic diagram of another energy absorption circuit according to an embodiment of the present invention;

fig. 12 is a schematic diagram of a topology of another energy absorption circuit according to an embodiment of the present invention.

Detailed Description

The embodiments of the present invention will be described in conjunction with the accompanying drawings, and it should be understood that the embodiments described herein are only for the purpose of illustrating and explaining the present invention, and are not intended to limit the present invention.

In view of the problems of large size, high cost, complex circuit and the like of the alternating current voltage regulator in the prior art, the embodiment of the invention provides a voltage regulating circuit which is used for simultaneously realizing the functions of boosting and reducing voltage, simplifying the circuit structure, reducing the cost and reducing the size of the voltage regulator.

The circuit provided by the embodiment of the invention is explained in detail below with reference to the accompanying drawings.