CN209389953U - A kind of AC-dc converter generation circuit - Google Patents
A kind of AC-dc converter generation circuit Download PDFInfo
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- CN209389953U CN209389953U CN201821500537.4U CN201821500537U CN209389953U CN 209389953 U CN209389953 U CN 209389953U CN 201821500537 U CN201821500537 U CN 201821500537U CN 209389953 U CN209389953 U CN 209389953U
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Abstract
The utility model belongs to avionics field, especially relates to a kind of AC-dc converter generation circuit.Conventional bridge capacitor filter uses power diode to be designed for basic component, but it is excessive to have the shortcomings that diode power consumes.The AC-dc converter generation circuit of the utility model includes transformer circuit 1, PWM controller power supply circuit 2 and DC rectifier circuit 3.While realizing that AC power source is converted to DC power supply, output rectified current is more much smaller than conventional bridge capacitor filter rectified current, therefore reduces the power loss of diode rectifier bridge, and circuit efficiency is significantly promoted.
Description
Technical field
The utility model belongs to avionics field, especially relates to a kind of AC-dc converter generation electricity
Road.
Background technique
Avionic device is powered frequently with 115V/400Hz AC power source, and AC power source is linked into electronic equipment
Afterwards, 115V AC power source is often depressured in power input by transformer by electronic equipment, then passes through bridge-type capacitor
AC power source after decompression is carried out direct current conversion by filter circuit, and the DC voltage for obtaining certain amplitude makes for rear end electrical equipment
With circuit theory schematic diagram is as shown in Figure 1.
Conventional bridge capacitor filter uses power diode rectifier bridge to be designed for basic component, but there are two
The excessive disadvantage of pole pipe power consumption.Such as some high currents application for, due to diode there are 0.5V~
The pressure drop of 1.2V causes the power consumed on diode excessive when larger by the electric current of diode, and diode radiating is tired
The reliability of difficulty, circuit reduces, and power supply conversion efficiency also reduces.
Summary of the invention
Goal of the invention: the purpose of the utility model is to provide a kind of AC-dc converter generation circuits, reduce traditional axle
Loss in efficiency in formula capacitor filter improves the reliability of circuit.
Technical solution: a kind of AC-dc converter generation circuit, which is characterized in that controlled including transformer circuit 1, PWM
Device power supply circuit 2 and DC rectifier circuit 3 processed, external 115V/400Hz AC power source are connected to the input terminal of transformer circuit 1, become
The output end of transformer circuits 1 is coupled with the input terminal of PWM controller power supply circuit 2 and DC rectifier circuit 3, PWM controller
The output of power supply circuit 2 terminates to the input terminal of DC rectifier circuit 3.
The DC rectifier circuit 3 works by BOOST circuit topological structure, including PWM controller, inductor, MOS
Pipe, diode, capacitor and error amplifier, the DC voltage of output is by formulaIt determines.
In the positive and negative half cycle of input ac power, the DC rectifier circuit 3 using two sets of different BOOST circuits into
Row work.
The transformer circuit 1 can be made of transformer T2, transformer T2 by the input ac power of primary side side with
Secondary side isolation after reducing 3~4 times, is exported in transformer T2 secondary side.
The transformer turns ratio is 3:1.
The PWM controller power supply circuit 2 includes diode and capacitor.
The utility model has the advantages that the utility model provides a kind of novel AC-dc converter generation circuit, alternating current is being realized
While source is converted to DC power supply, output rectified current is reduced, therefore reduce the power consumed on diode, to mention
The transfer efficiency for having risen power supply improves the reliability of circuit.
Detailed description of the invention
Fig. 1 is the circuit diagram of conventional bridge capacitor filter；
Fig. 2 is the circuit diagram of the utility model embodiment.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawing, refering to Fig. 2.
As shown in Fig. 2, a kind of AC-dc converter generation circuit includes transformer circuit 1, PWM controller power supply electricity
Road 2 and DC rectifier circuit 3, the external 115V/400Hz AC power source are connected to the input terminal of transformer circuit 1, transformer electricity
The output end on road 1 is coupled with the input terminal of PWM controller power supply circuit 2 and DC rectifier circuit 3, PWM controller power supply electricity
The output on road 2 terminates to the input terminal of DC rectifier circuit 3.
Transformer circuit 1 is used to external 115V/400Hz AC power source being converted to lower AC power source.Actual use
When, transformer circuit 1 can be made of transformer T2, transformer T2 by the input ac power of primary side side and secondary side every
From after reducing 3~4 times, in the output of transformer T2 secondary side.If transformer turns ratio is 3:1, then external 115V/400Hz alternating current
After transformer transformation, output is about the AC power source of 40V/400Hz in source.
PWM controller power supply circuit 2 will after the AC power source of 1 transformation of transformer circuit is rectified, be that direct current is whole
Current circuit 3 provides small power DC power supply.In actual use, PWM controller power supply circuit 2 can by diode V7, V8,
Capacitor C5 composition.
3 pairs of the DC rectifier circuit AC power sources Jing Guo 1 transformation of transformer circuit carry out DC boosting rectification.Actual use
When, DC rectifier circuit 3 can be by PWM controller, inductor L1, L2, metal-oxide-semiconductor V9, V10, diode V1, V2, V3, V4, electricity
Container C1, error amplifier N1 composition, DC rectifier circuit 3 work by BOOST circuit topological structure.Work as transformer circuit
When the AC power source of 1 output is in positive half cycle, under the switch control of PWM controller, inductor L1, L2, metal-oxide-semiconductor V9, V10,
Diode V1, V2, capacitor C1 constitute a set of BOOST booster circuit.When the AC power source that transformer circuit 1 exports is in negative half
Zhou Shi, under the switch control of PWM controller, inductor L1, L2, metal-oxide-semiconductor V9, V10, diode V3, V4, capacitor C1 composition
Another set of BOOST booster circuit.Error amplifier N1 constitutes negative feedback control, for adjusting the straight of the output of DC rectifier circuit 3
Galvanic electricity pressure.
The DC voltage that DC rectifier circuit 3 exports is by formulaIt determines.As transformer circuit 1 exports
The AC power source of 40V/400Hz, under conditions of duty ratio D=0.2, output voltage VOIt will be adjusted to 50V.Through DC rectifier electricity
After road 3 carries out DC boosting rectification, output voltage can be adjusted flexibly by setting value, and the voltage of output can be much higher than input electricity
Pressure, so output rectified current is more much smaller than conventional bridge capacitor filter rectified current, efficiency is significantly promoted.
Claims (3)
1. a kind of AC-dc converter generation circuit, which is characterized in that power including transformer circuit (1), PWM controller
Circuit (2) and DC rectifier circuit (3), external 115V/400Hz AC power source are connected to the input terminal of transformer circuit (1), transformation
The output end of device circuit (1) is coupled with the input terminal of PWM controller power supply circuit (2) and DC rectifier circuit (3), PWM control
The output of device power supply circuit (2) processed terminates to the input terminal of DC rectifier circuit (3).
2. a kind of AC-dc converter generation circuit according to claim 1, which is characterized in that the transformer electricity
Road (1) can be made of transformer T2, and transformer T2 is isolated by the input ac power of primary side side with secondary side, reduce 3~4
After times, exported in transformer T2 secondary side.
3. a kind of AC-dc converter generation circuit according to claim 2, which is characterized in that the transformer circle
Than for 3:1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821500537.4U CN209389953U (en) | 2018-09-11 | 2018-09-11 | A kind of AC-dc converter generation circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821500537.4U CN209389953U (en) | 2018-09-11 | 2018-09-11 | A kind of AC-dc converter generation circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209389953U true CN209389953U (en) | 2019-09-13 |
Family
ID=67869811
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821500537.4U Active CN209389953U (en) | 2018-09-11 | 2018-09-11 | A kind of AC-dc converter generation circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209389953U (en) |
-
2018
- 2018-09-11 CN CN201821500537.4U patent/CN209389953U/en active Active
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