CN215072190U

CN215072190U - Full-bridge square wave inverter circuit

Info

Publication number: CN215072190U
Application number: CN202121177357.9U
Authority: CN
Inventors: 吕世光
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-05-28
Filing date: 2021-05-28
Publication date: 2021-12-07
Anticipated expiration: 2031-05-28

Abstract

The application discloses full-bridge square wave inverter circuit includes: the full-bridge main circuit comprises a first switching tube, a second switching tube, a third switching tube and a fourth switching tube which are connected in a full-bridge mode; a first port of the protection element is connected with a positive voltage terminal BUSS +, a second port of the protection element is connected with a third end of the common-mode inductor, the third port is connected with a second end of the common-mode inductor, and a fourth port of the protection element is grounded; the first end of the common mode inductor is connected with the source electrode of the third switching tube, and the fourth end of the common mode inductor is connected with the source electrode of the first switching tube. The utility model discloses a full-bridge square wave inverter circuit can release, retrieve the energy of the load of the circuit of harm, raises the efficiency, and the protection device prevents that the condition of damage from taking place.

Description

Full-bridge square wave inverter circuit

Technical Field

The application relates to the field of inverter circuits, in particular to a full-bridge square wave inverter circuit.

Background

The current full-bridge inverter circuit uses very extensively, mainly divides into full-bridge circuit and half-bridge circuit, and the control end of its switch tube of full-bridge when using is connected with the controller with the help of drive circuit, and the intermittent type nature break-make through controller control switch tube makes the on-state of full-bridge change to the output signal of telecommunication that obtains to have required waveform. However, in application, the full-bridge square wave inverter circuit has some defects, and when a load circuit is loaded with a damaged circuit, a switch tube in the circuit generates a large amount of heat, so that the whole circuit has low working efficiency and is easy to damage.

In view of the above technical problems in the prior art, no effective solution has been proposed.

SUMMERY OF THE UTILITY MODEL

The utility model provides a full-bridge square wave inverter circuit to it is big to solve switch tube calorific capacity among the circuit that exists among the prior art at least, and the work efficiency who leads to whole circuit is low, the technical problem of easy damage.

According to an aspect of the present application, there is provided a full-bridge square wave inverter circuit, including: the full-bridge main circuit comprises a first switching tube, a second switching tube, a third switching tube and a fourth switching tube which are connected in a full-bridge mode;

a first port of the protection element is connected with a positive voltage terminal BUSS +, a second port of the protection element is connected with a third end of the common-mode inductor, the third port is connected with a second end of the common-mode inductor, and a fourth port of the protection element is grounded;

the first end of the common mode inductor is connected with the source electrode of the third switching tube, and the fourth end of the common mode inductor is connected with the source electrode of the first switching tube.

Optionally, the second port of the protection element and the third terminal of the common mode inductor are both connected to an ac output live wire.

Optionally, the third port of the protection element and the second end of the common mode inductor are both connected to an ac output neutral line.

Optionally, the full-bridge square wave inverter circuit further includes a filter capacitor, and an anode of the filter capacitor is connected to BUSS + and a cathode of the filter capacitor is grounded.

Optionally, the full-bridge square wave inverter circuit further includes a current sampling resistor, one end of the current sampling resistor is connected to the source of the second switch tube, and the other end of the current sampling resistor is grounded.

Optionally, the drain of the first switching tube and the drain of the third switching tube are both connected to a positive voltage terminal BUSS +.

Optionally, the drain of the second switching tube is connected to the fourth end of the common mode inductor.

Optionally, the drain of the fourth switching tube is connected to the first end of the common mode inductor.

Optionally, the source electrode of the second switching tube and the source electrode of the fourth switching tube are both connected to a current sampling element CT.

Optionally, the protective element is a half-bridge stack.

The utility model discloses a full-bridge square wave inverter circuit can release, retrieve the energy of the load of the circuit of harm, raises the efficiency, and the protection device prevents that the condition of damage from taking place.

The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.

Drawings

Some specific embodiments of the present application will be described in detail hereinafter by way of illustration and not limitation with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:

fig. 1 is a diagram of a full-bridge square wave inverter circuit according to an embodiment of the present application.

Detailed Description

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

In order to make the technical solution of the present invention better understood, the technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.

It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances for describing embodiments of the invention herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

Fig. 1 is a diagram of a full-bridge square wave inverter circuit according to an embodiment of the present application. The full-bridge square wave inverter circuit may generally include: the full-bridge main circuit comprises a first switch tube Q1, a second switch tube Q2, a third switch tube Q3 and a fourth switch tube Q4 which are connected in a full-bridge mode, and a protection element S1, a common-mode inductor L1, a filter capacitor C1 and a current sampling resistor R1. OUT-L is an AC output live wire, OUT-N is an AC output zero line. The protection element S1 is implemented as a bridge stack, which refers to a rectifying device assembled by bridge connection of rectifying elements (generally rectifying diodes), and preferably, a half-bridge stack consisting of two rectifying diodes is selected for S1.

A first port of the protection element S1 is connected with a positive voltage end BUSS +, a second port is connected with a third end of the common-mode inductor, the third port is connected with a second end of the common-mode inductor L1, and a fourth port is grounded;

the first end of the common mode inductor L1 is connected to the source of the third switching tube Q3, and the fourth end is connected to the source of the first switching tube Q1.

The second port of the protection element S1 and the third port of the common mode inductor L1 are both connected with an AC output live wire OUT-L.

The third port of the protection element S1 and the second end of the common mode inductor L1 are both connected with an alternating current output zero line OUT-N.

The positive pole of the filter capacitor C1 is connected with BUSS + and the negative pole is grounded.

One end of the current sampling resistor R1 is connected to the source of the second switch tube Q2, and the other end is grounded.

The drain of the first switching tube Q1 and the drain of the third switching tube Q3 are both connected to the positive voltage terminal bus +.

The drain of the second switch Q2 is connected to the fourth terminal of the common mode inductor L1.

The drain of the fourth switching tube Q4 is connected to the first terminal of the common mode inductor L1.

The source of the second switch transistor Q2 and the source of the fourth switch transistor Q4 are both connected to CT (representing a current sampling element).

The utility model discloses an element L1 and S1 that add have formed the energy feedback passageway on the basis of classic H bridge, when the load is for the load that is harmful to the circuit, store load energy to output and use for the load when load work, improve energy utilization efficiency.

Unless specifically stated otherwise, the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and in the case of not making a contrary explanation, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be interpreted as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

The above description is only for the preferred embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A full-bridge square wave inverter circuit, comprising:

the full-bridge main circuit comprises a first switching tube, a second switching tube, a third switching tube and a fourth switching tube which are connected in a full-bridge mode;

a first port of the protection element is connected with the positive voltage end, a second port of the protection element is connected with a third end of the common-mode inductor, the third port of the protection element is connected with the second end of the common-mode inductor, and a fourth port of the protection element is grounded;

2. A full-bridge square-wave inverter circuit according to claim 1,

and the second port of the protection element and the third end of the common-mode inductor are both connected with an alternating current output live wire.

3. A full bridge square wave inverter circuit according to claim 1 or 2,

and the third port of the protection element and the second end of the common mode inductor are both connected with an alternating current output zero line.

4. A full-bridge square-wave inverter circuit according to claim 1,

the full-bridge square wave inverter circuit further comprises a filter capacitor, wherein the anode of the filter capacitor is connected with the anode voltage end, and the cathode of the filter capacitor is grounded.

5. A full-bridge square-wave inverter circuit according to claim 1,

the full-bridge square wave inverter circuit further comprises a current sampling resistor, one end of the current sampling resistor is connected with the source electrode of the second switch tube, and the other end of the current sampling resistor is grounded.

6. A full-bridge square-wave inverter circuit according to claim 1,

and the drain electrode of the first switching tube and the drain electrode of the third switching tube are both connected with a positive voltage end.

7. A full-bridge square-wave inverter circuit according to claim 1,

and the drain electrode of the second switching tube is connected with the fourth end of the common-mode inductor.

8. A full-bridge square-wave inverter circuit according to claim 1,

and the drain electrode of the fourth switching tube is connected with the first end of the common-mode inductor.

9. A full-bridge square-wave inverter circuit according to claim 1,

and the source electrode of the second switching tube and the source electrode of the fourth switching tube are both connected with a current sampling element.

10. A full-bridge square-wave inverter circuit according to claim 1,

the protection element is a half-bridge stack.