CN211859971U - AC to DC conversion circuit - Google Patents

Abstract

The utility model discloses an AC-DC conversion circuit, which comprises a rectifier module BD1 and a first inductance coil FL1, the first input end of the first inductance coil FL1 is connected to the L end of the alternating current, and the first inductance coil FL1 The second input terminal is connected to the N terminal of the alternating current; the first output terminal of the first inductor coil FL1 is connected to the first input terminal of the rectifier module BD1, and the second output terminal of the first inductor coil FL1 is connected to the rectifier module BD1 The second input end of the rectifier module BD1 is connected to the second input end; the first output end and the second output end of the rectifier module BD1 are the output ends of the AC-DC conversion circuit. The power conversion efficiency of the AC-DC conversion circuit is high and the output is stable.

Description

AC to DC conversion circuit

technical field

The utility model relates to the technical field of power supply, in particular to an AC/DC conversion circuit.

Background technique

With the popularity of mobile phones, tablet computers, and LED lights, the application of power supplies is becoming more and more extensive. In the application of power supply, to convert alternating current into direct current to charge the load, its input voltage needs to adapt to the wide alternating current power input of 100-240V. In the prior art, the rectifier bridge formed by connecting the common four diodes directly converts alternating current into direct current, which not only has low power conversion efficiency, but also generates large interference waves, thereby affecting the stability of power output and thus affecting the work of electronic products. reliability.

Utility model content

The technical problem to be solved by the utility model is to provide an AC-DC conversion circuit with high power conversion efficiency and stable output.

The technical scheme of the present invention is to provide an AC-DC conversion circuit, which includes a rectifier module BD1 and a first inductance coil FL1,

The first input end of the first inductance coil FL1 is connected to the L end of the alternating current, and the second input end of the first inductance coil FL1 is connected to the N end of the alternating current;

The first output end of the first inductor coil FL1 is connected to the first input end of the rectifier module BD1, and the second output end of the first inductor coil FL1 is connected to the second input end of the rectifier module BD1; the rectifier module The first output end and the second output end of the BD1 are the output ends of the AC-DC conversion circuit.

The AC-DC conversion circuit further includes a second inductance coil FL2, the second inductance coil FL2 is connected in series between the rectifier module BD1 and the first inductance coil FL1; the first input end of the second inductance coil FL2 is connected to the The first output end of the first inductance coil FL1 is connected, the second input end of the second inductance coil FL2 is connected with the second output end of the first inductance coil FL1; the first output end of the second inductance coil FL2 is connected to The first input end of the rectifier module BD1 is connected, and the second output end of the second inductor coil FL2 is connected to the second input end of the rectifier module BD1.

The AC-DC conversion circuit further includes a bidirectional suppression protection device MOV1, one end of the bidirectional suppression protection device MOV1 is connected to the first input end of the first inductor coil FL1, and the other end of the bidirectional suppression protection device MOV1 is connected to the first input end of the first inductor coil FL1. The second input end of the inductor coil FL1 is connected.

The AC/DC conversion circuit further includes a first fuse F1 and a second fuse F2, the first fuse F1 is connected in series between the L end of the AC power and one end of the bidirectional suppression protection device MOV1, and one end of the first fuse F1 is connected in series. Connected to the L end of the alternating current, the other end of the first fuse F1 is connected to one end of the bidirectional suppression protection device MOV1; the second fuse F2 is connected in series with the first input end of the first inductance coil FL1 and the bidirectional suppression protection device MOV1 One end of the second fuse F2 is connected to the first input end of the first inductance coil FL1, and the other end of the second fuse F2 is connected to one end of the bidirectional suppression protection device MOV1.

The AC/DC conversion circuit further includes a degaussing device RT1, the degaussing device RT1 is connected in series between the second input end of the first inductance coil FL1 and the other end of the bidirectional suppression protection device MOV1, and one end of the degaussing device RT1 It is connected to the second input end of the first inductance coil FL1, and the other end of the degaussing device RT1 is connected to the other end of the bidirectional suppression protection device MOV1.

The AC/DC conversion circuit further includes a filter capacitor C1, one end of the filter capacitor C1 is connected to the first output end of the first inductor coil FL1, and the other end of the filter capacitor C1 is connected to the second output end of the first inductor coil FL1. output connection.

The AC/DC conversion circuit further includes a filter capacitor C2, one end of the filter capacitor C2 is connected to the first output end of the rectifier module BD1, and the other end of the filter capacitor C2 is connected to the second output end of the rectifier module BD1.

The AC/DC conversion circuit further includes an electrolytic capacitor CE1, the positive electrode of the electrolytic capacitor CE1 is connected to the first output end of the rectifier module BD1, and the negative electrode of the electrolytic capacitor CE1 is connected to the second output end of the rectifier module BD1.

After adopting the above structure, compared with the prior art, the present invention has the following advantages:

The AC-DC conversion circuit of the utility model filters out the interference wave in the circuit and reduces the power loss through the application of the rectifier module, the inductance coil, the bidirectional suppression protection device and the degaussing device. Therefore, not only the power conversion efficiency is high, but also the generated interference wave is small, thereby ensuring the stability of the power output, and thus ensuring the working reliability of the electronic product.

Description of drawings

Fig. 1 is the circuit principle diagram of the AC-DC conversion circuit of the present invention.

Detailed ways

The present utility model will be further described below in conjunction with the accompanying drawings and specific embodiments.

As shown in FIG. 1 , an AC-DC conversion circuit of the present invention includes a rectifier module BD1 and a first inductance coil FL1 , and the model of the rectifier module BD1 is ABS210.

The first input end of the first inductance coil FL1 is connected to the L end of the alternating current, and the second input end of the first inductance coil FL1 is connected to the N end of the alternating current;

The first output end of the first inductor coil FL1 is connected to the first input end of the rectifier module BD1, and the second output end of the first inductor coil FL1 is connected to the second input end of the rectifier module BD1; the rectifier module The first output end and the second output end of the BD1 are the output ends of the AC-DC conversion circuit.

The AC-DC conversion circuit further includes a second inductance coil FL2, the second inductance coil FL2 is connected in series between the rectifier module BD1 and the first inductance coil FL1; the first input end of the second inductance coil FL2 is connected to the The first output end of the first inductance coil FL1 is connected, the second input end of the second inductance coil FL2 is connected with the second output end of the first inductance coil FL1; the first output end of the second inductance coil FL2 is connected to The first input end of the rectifier module BD1 is connected, and the second output end of the second inductor coil FL2 is connected to the second input end of the rectifier module BD1.

The AC-DC conversion circuit further includes a bidirectional suppression protection device MOV1. In this embodiment, the bidirectional suppression protection device MOV1 is a bidirectional suppression protection diode. One end of the bidirectional suppression protection device MOV1 is connected to the first end of the first inductor coil FL1. The input end is connected, and the other end of the bidirectional suppression protection device MOV1 is connected with the second input end of the first inductance coil FL1.

The AC/DC conversion circuit further includes a first fuse F1 and a second fuse F2, the first fuse F1 is connected in series between the L end of the AC power and one end of the bidirectional suppression protection device MOV1, and one end of the first fuse F1 is connected in series. Connected to the L end of the alternating current, the other end of the first fuse F1 is connected to one end of the bidirectional suppression protection device MOV1; the second fuse F2 is connected in series with the first input end of the first inductance coil FL1 and the bidirectional suppression protection device MOV1 One end of the second fuse F2 is connected to the first input end of the first inductance coil FL1, and the other end of the second fuse F2 is connected to one end of the bidirectional suppression protection device MOV1. The first fuse F1 and the second fuse F2 are used to prevent the short circuit of the circuit from causing damage to the conversion circuit.

The AC-DC conversion circuit further includes a degaussing device RT1. In this embodiment, the degaussing device RT1 is a degaussing resistor; the degaussing device RT1 is connected in series with the second input end of the first inductance coil FL1 and the bidirectional suppression protection device MOV1. One end of the degaussing device RT1 is connected to the second input end of the first inductance coil FL1, and the other end of the degaussing device RT1 is connected to the other end of the bidirectional suppression protection device MOV1.

The AC/DC conversion circuit further includes a filter capacitor C1, one end of the filter capacitor C1 is connected to the first output end of the first inductor coil FL1, and the other end of the filter capacitor C1 is connected to the second output end of the first inductor coil FL1. output connection. The filter capacitor C1 is used for filtering.

The AC/DC conversion circuit further includes a filter capacitor C2, one end of the filter capacitor C2 is connected to the first output end of the rectifier module BD1, and the other end of the filter capacitor C2 is connected to the second output end of the rectifier module BD1. Filter capacitor C2 is used for filtering.

The AC/DC conversion circuit further includes an electrolytic capacitor CE1, the positive electrode of the electrolytic capacitor CE1 is connected to the first output end of the rectifier module BD1, and the negative electrode of the electrolytic capacitor CE1 is connected to the second output end of the rectifier module BD1. Electrolytic capacitor CE1 is used for filtering.

The above only describes the best embodiment of the present utility model, but should not be construed as a limitation on the claims. Any changes made within the protection scope of the independent claims of the present utility model are all within the protection scope of the present utility model.

Claims (8)

1. An AC-DC conversion circuit, characterized in that: comprising a rectifier module BD1 and a first inductance coil FL1, The first input end of the first inductance coil FL1 is connected to the L end of the alternating current, and the second input end of the first inductance coil FL1 is connected to the N end of the alternating current; The first output end of the first inductor coil FL1 is connected to the first input end of the rectifier module BD1, and the second output end of the first inductor coil FL1 is connected to the second input end of the rectifier module BD1; the rectifier module The first output end and the second output end of the BD1 are the output ends of the AC-DC conversion circuit. 2 . The AC-DC conversion circuit according to claim 1 , wherein the AC-DC conversion circuit further comprises a second inductor coil FL2 , and the second inductor coil FL2 is connected in series with the rectifier module BD1 and the first inductor. 3 . between coils FL1; the first input end of the second inductance coil FL2 is connected to the first output end of the first inductance coil FL1, and the second input end of the second inductance coil FL2 is connected to the first output end of the first inductance coil FL1 The two output terminals are connected; the first output terminal of the second inductor coil FL2 is connected to the first input terminal of the rectifier module BD1, and the second output terminal of the second inductor coil FL2 is connected to the second input terminal of the rectifier module BD1 . 3 . The AC-DC conversion circuit according to claim 2 , wherein the AC-DC conversion circuit further comprises a bidirectional suppression protection device MOV1 , one end of the bidirectional suppression protection device MOV1 is connected to the first inductance coil FL1 . An input end is connected, and the other end of the bidirectional suppression protection device MOV1 is connected to the second input end of the first inductor coil FL1. 4. The AC-DC conversion circuit according to claim 3, characterized in that: the AC-DC conversion circuit further comprises a first fuse F1 and a second fuse F2, and the first fuse F1 is connected in series with the L end of the AC power and the fuse. Between one end of the bidirectional suppression protection device MOV1, one end of the first fuse F1 is connected to the L end of the alternating current, and the other end of the first fuse F1 is connected to one end of the bidirectional suppression protection device MOV1; the second fuse F2 connected in series between the first input end of the first inductor coil FL1 and one end of the bidirectional suppression protection device MOV1, one end of the second fuse F2 is connected to the first input end of the first inductor coil FL1, and the second fuse F2 The other end is connected with one end of the bidirectional suppression protection device MOV1. 5. The AC-DC conversion circuit according to claim 4, characterized in that: the AC-DC conversion circuit further comprises a degaussing device RT1, and the degaussing device RT1 is connected in series with the second input end of the first inductance coil FL1 and the degaussing device RT1. Between the other ends of the bidirectional suppression protection device MOV1, one end of the degaussing device RT1 is connected to the second input end of the first inductor coil FL1, and the other end of the degaussing device RT1 is connected to the other end of the bidirectional suppression protection device MOV1. 6 . The AC-DC conversion circuit according to claim 5 , wherein the AC-DC conversion circuit further comprises a filter capacitor C1 , and one end of the filter capacitor C1 is connected to the first output end of the first inductor coil FL1 . , the other end of the filter capacitor C1 is connected to the second output end of the first inductor coil FL1. 7 . The AC-DC conversion circuit according to claim 6 , wherein the AC-DC conversion circuit further comprises a filter capacitor C2 , and one end of the filter capacitor C2 is connected to the first output end of the rectifier module BD1 . The other end of the filter capacitor C2 is connected to the second output end of the rectifier module BD1. 8 . The AC-DC conversion circuit according to claim 7 , wherein the AC-DC conversion circuit further comprises an electrolytic capacitor CE1 , and the positive electrode of the electrolytic capacitor CE1 is connected to the first output end of the rectifier module BD1 . The negative electrode of the electrolytic capacitor CE1 is connected to the second output end of the rectifier module BD1.

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