CN204465366U - A protective bridge rectifier circuit and its module - Google Patents

Abstract

The utility model discloses a kind of protection type bridge rectifier and has its module.This protection type bridge rectifier, comprising: AC transformer, ac input end: comprise input AC positive pole and input AC negative pole; DC output end: comprise and export direct-flow positive pole and export direct current negative pole; Rectifier diode, is located between ac input end and DC output end; The two-way transient state killer tube of input; The two-way transient state killer tube of output; The vice-side winding of ac input end and AC transformer is electrically connected, described input two-way transient state killer tube is integrated between described input AC positive pole and described input AC negative pole, and described output two-way transient state killer tube is integrated between described output direct-flow positive pole and described output direct current negative pole.This has the module of protection type bridge rectifier, comprises protection type bridge rectifier as above.Compared with prior art; the utility model, by two two-way transient state killer tubes of output being integrated in respectively input and the output of bridge rectifier, can being protected rectifier bridge not affect by input power surge and protect downstream load circuit not damage by upstream surge noise effect.

Description

A protective bridge rectifier circuit and its module

technical field

The utility model relates to a bridge rectifier circuit, in particular to a protective bridge rectifier circuit and a module thereof.

Background technique

The bridge rectifier circuit is a common type of rectifier circuit, and its basic working principle is to use the unidirectional conductivity of the diode to rectify the input AC voltage. At present, the AC input voltage fluctuates frequently or the AC input voltage is too high instantaneously, and the internal power devices of the module are prone to breakdown and short circuit; the rectified output voltage may also have peak voltages, resulting in damage to the load devices or rectifier diodes.

In addition, the existing bridge rectifier circuits are generally integrated in the circuit design of the product, and different series of products will be designed repeatedly, and there is no independent, general-purpose module available.

Utility model content

The purpose of the utility model is to provide a protective bridge rectifier circuit which can solve the above-mentioned technical problems.

The purpose of the utility model is also to provide a module with a protective bridge rectifier circuit.

Among them, the protective bridge rectifier circuit includes:

AC transformer: including primary winding and secondary winding;

AC input terminal: including input AC positive pole and input AC negative pole;

DC output terminal: including output DC positive pole and output DC negative pole;

a rectifier diode, located between the AC input terminal and the DC output terminal;

Input bidirectional transient suppression tube;

Output bidirectional transient suppression tube;

Wherein, the AC input terminal is electrically connected to the secondary winding of the AC transformer, the input terminal bidirectional transient suppression tube is integrated between the input AC positive pole and the input AC negative pole, and the output terminal bidirectional The transient suppression tube is integrated between the output DC positive pole and the output DC negative pole;

The bidirectional transient suppression tube at the input end is cut off when the secondary winding of the AC transformer outputs a normal voltage, and can be turned on instantly and clamp the voltage when a high-voltage surge occurs in the secondary winding of the AC transformer;

The bidirectional transient suppression tube at the output end is cut off when the output DC positive pole and the output DC negative pole are in normal output voltage, and can be turned on instantly and clamp the voltage when the output DC positive pole and the output DC negative pole have a high-voltage surge .

As a further improvement of the present invention, the protective bridge rectifier circuit further includes a load circuit electrically connected to the DC output terminal.

As a further improvement of the utility model, the protective bridge rectifier circuit further includes a filter, and the filter is connected in parallel with the DC output end.

In order to achieve the above object of another utility model, the utility model provides a module with a protective bridge rectifier circuit, including the protective bridge rectifier circuit described in any one of the above items.

Compared with the prior art, the protective bridge rectifier circuit provided by the utility model can protect the rectifier bridge from input Power surges affect and protect downstream load circuits from damage caused by upstream surge noise.

Description of drawings

FIG. 1 is a circuit diagram of a protective bridge rectifier circuit in an embodiment of the present invention.

Fig. 2 is a front layout design drawing of a protective bridge rectifier circuit module in an embodiment of the present invention.

FIG. 3 is a layout design diagram of the reverse side of the protection bridge rectifier circuit module in an embodiment of the present invention.

Detailed ways

The utility model will be described in detail below in conjunction with the specific embodiments shown in the accompanying drawings. However, these embodiments do not limit the present utility model, and the structural, method, or functional changes made by those skilled in the art according to these embodiments are all included in the protection scope of the present utility model.

Referring to Fig. 1, a specific embodiment of the protective bridge rectifier circuit of the present invention is introduced. A rectifying circuit is a circuit that converts AC power into DC power. Most rectification circuits are composed of AC transformers, rectification main circuits and filters. This circuit consists of an AC transformer (including primary winding, secondary winding and iron core) and two bridge arms (including two pairs of rectifier diodes), which can realize full-wave rectification and overcome half-wave rectification to a certain extent. Disadvantages of rectification. In this embodiment, the protective bridge rectifier circuit includes an AC transformer (not shown in the figure), an AC input terminal, a DC output terminal, rectifier diodes D1, D2, D3, D4, an input terminal bidirectional transient suppression tube D5, an output terminal Bidirectional transient suppression tube D6 and filter (not shown).

Among them, the AC input terminal includes the input AC positive pole 10 and the input AC negative pole 20, the DC output terminal includes the output DC positive pole 30 and the output DC negative pole 40, and the rectifier diodes D1, D2, D3, D4 are arranged between the AC input terminal and the DC output terminal In between, the bidirectional transient suppression tube D5 at the input end is integrated between the input AC positive pole 10 and the input AC negative pole 20 , and the bidirectional transient suppression tube D6 at the output end is integrated between the output DC positive pole 30 and the output DC negative pole 40 . The protective bridge rectifier circuit also includes a load circuit (not shown in the figure) and a filter (not shown in the figure), the load circuit is electrically connected to the DC output terminal, and the filter is connected in parallel to the DC output terminal.

The input AC positive pole 10 and the input AC negative pole 20 are connected to the output terminal of the secondary winding of an AC transformer (not shown in the figure). Generally, the transformer will determine the transformation ratio according to the working voltage of the back-end load and perform transformation processing. When the transformer secondary output is in the positive half cycle, the input AC positive pole 10 is positive, the input AC negative pole 20 is negative, and the rectifier diodes D1 and D3 are turned on; the transformer secondary output is in the negative half cycle, that is, the input AC positive pole 10 is negative, and the input The AC negative pole 20 is positive, and the rectifier diodes D2 and D4 are turned on. This circuit makes the output DC positive pole 30 and output DC negative pole 40 always provide positive voltage to the load (not shown) during the whole cycle of the output of the secondary side of the AC transformer, and then passes through the filter connected in parallel with the DC output terminal (not shown in the figure) ) so that the output DC positive pole 30 and the output DC negative pole 40 provide a smooth DC voltage to the load.

The bidirectional transient suppression tube D5 at the input end is integrated between the input AC positive pole 10 and the input AC negative pole 20 of the protective rectifier bridge, and the bidirectional transient suppression tube D6 at the output end is integrated between the output DC positive pole 30 and the output DC negative pole of the protective rectifier bridge. Between 40.

The bidirectional transient suppression tube D5 at the input end is cut off when the secondary side of the AC transformer outputs normal output voltage. When the secondary side of the AC transformer has a high-voltage surge, it can be turned on instantly and clamp the voltage to discharge the high-voltage surge and prevent rectification at the rear end. Diodes are burned out to protect the bridge rectifier from input power surges.

The bidirectional transient suppression tube D6 at the output end is cut off when the output DC positive pole 30 and the output DC negative pole 40 are in normal output voltage. The surge is discharged, which can clamp the downstream load circuit and prevent it from being damaged by the upstream surge noise.

In addition, the utility model can also make the protective rectifier bridge circuit into a standard component package library and a standard PCB package library. If different series of products use the same rectifier circuit in the design, the package library can be directly called, and there is no need to repeat the design. Place and route to shorten the design cycle.

As shown in Figure 2 and Figure 3, the utility model also provides a module with a protective bridge rectifier circuit, the module can obtain the above-mentioned various embodiments by using the protective bridge rectifier circuit introduced in the above-mentioned various embodiments. The beneficial effects of the medium-protection bridge rectifier circuit, and since no improvement has been made to other structures or functions of the module, other structures of the module with the protection bridge rectifier circuit will not be repeated here. .

The protective rectifier bridge circuit of the utility model can realize independent packaging, and the actual production process includes PCB production and component packaging. There are six placement areas 50 in FIG. 2 , and four placement ports 60 in FIG. 3 . The independent modules in the utility model can be individually tested during production, and then mounted on the actual product to improve the yield rate of the final product and ensure the quality of the final product.

It should be understood that although this description is described according to implementation modes, not each implementation mode only contains an independent technical solution, and this description in the description is only for clarity, and those skilled in the art should take the description as a whole, and each The technical solutions in the embodiments can also be properly combined to form other embodiments that can be understood by those skilled in the art.

The series of detailed descriptions listed above are only specific descriptions for the feasible implementation modes of the present utility model, and they are not used to limit the protection scope of the present utility model. Embodiments or modifications should be included within the protection scope of the present utility model.

Claims (4)

1. A protective bridge rectifier circuit, characterized in that it comprises: AC transformer: including primary winding and secondary winding; AC input terminal: including input AC positive pole and input AC negative pole; DC output terminal: including output DC positive pole and output DC negative pole; a rectifier diode, located between the AC input terminal and the DC output terminal; Input bidirectional transient suppression tube; Output bidirectional transient suppression tube; Wherein, the AC input terminal is electrically connected to the secondary winding of the AC transformer, the input terminal bidirectional transient suppression tube is integrated between the input AC positive pole and the input AC negative pole, and the output terminal bidirectional The transient suppression tube is integrated between the output DC positive pole and the output DC negative pole; The bidirectional transient suppression tube at the input end is cut off when the secondary winding of the AC transformer outputs a normal voltage, and can be turned on instantly and clamp the voltage when a high-voltage surge occurs in the secondary winding of the AC transformer; The bidirectional transient suppression tube at the output end is cut off when the output DC positive pole and the output DC negative pole are in normal output voltage, and can be turned on instantly and clamp the voltage when the output DC positive pole and the output DC negative pole have a high-voltage surge . 2 . The protective bridge rectifier circuit according to claim 1 , wherein the protective bridge rectifier circuit further comprises a load circuit, and the load circuit is electrically connected to the DC output terminal. 3 . The protective bridge rectifier circuit according to claim 1 , wherein the protective bridge rectifier circuit further comprises a filter connected in parallel with the DC output terminal. 4 . 4. A module with a protective bridge rectifier circuit, characterized in that it comprises the protective bridge rectifier circuit according to any one of the preceding claims.