CN206686097U - A kind of rectification circuit - Google Patents
A kind of rectification circuit Download PDFInfo
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- CN206686097U CN206686097U CN201720343433.6U CN201720343433U CN206686097U CN 206686097 U CN206686097 U CN 206686097U CN 201720343433 U CN201720343433 U CN 201720343433U CN 206686097 U CN206686097 U CN 206686097U
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- power supply
- rectification bridge
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Abstract
The utility model supplies a kind of rectification circuit, is arranged between ac input circuit and switching power circuit, and the input for carrying out rectification and being input to Switching Power Supply, including single-phase rectification bridge stack BR1 and single-phase rectification bridge stack BR2 are inputted to exchange；BR1 and BR2 the 1st pin and the 3rd equal short circuit of pin；The pin of BR1 the 2nd and the pin short circuits of BR2 the 2nd, the pin of BR1 the 4th and the pin short circuits of BR2 the 4th；The L lines of ac input circuit connect BR1 the 1st pin, the N lines of ac input circuit connect BR2 the 1st pin；BR1 and BR2 the 2nd pin is connected with Switching Power Supply electrode input end, and Switching Power Supply negative input is connected with BR1 and BR2 the 4th pin.The problem of the utility model is applied successfully, and the power consumption for solving power supply script when high current works is concentrated, and heat dissipation design technology difficulty is big.And when solving problem above, parts selection advantage is added, improves the instream factor of device.
Description
Technical field
It the utility model is related to a kind of rectification circuit.
Background technology
It is to turn the single-phase alternating current of Switching Power Supply input as the exchange input rectification circuit of single-phase high frequency Switching Power Supply
The Key Circuit of direct current needed for being changed to, be whole Switching Power Supply input current must be through loop, all input currents of power supply
Flow through this loop.But due to device used in rectification circuit " single-phase rectification bridge stack ", it is made up of 4 diodes, such as Fig. 1 institutes
Show：It is a full bridge rectifier, and symbol is BR, and it is a four pin devices, the device of 4 other one-way conductions of diode
The electric bridge being formed by connecting.It is the 1st pin that 4 pins point are another, and it connects the second pole pipe D1 anode and diode D4 negative electrode, the 2nd
Pin connects diode D1 negative electrode and diode D2 negative electrode, and the 3rd pin connects diode D2 anode and diode D3 negative electrode,
4th pin connects diode D3 anode and diode D4 anode, and in the device of actual use, diode above can also
By the pipe or circuitry instead of other one-way conductions.
The L (live wire) of single phase ac input is connected on 2 pin of " single-phase rectification bridge stack ", and the N (zero line) of single phase ac input connects
In 3 pin of " single-phase rectification bridge stack ", 1 pin is connected to the "+" of Switching Power Supply, and 4 pin are connected to Switching Power Supply "-".
Its course of work is as shown in Figures 2 and 3：
The electric current that Fig. 2, Fig. 3 show single-phase rectification bridge normal work a cycle (uses IinRepresent) flow graph, Fig. 2 is work
Make in positive half cycle, Fig. 3 is to be operated in negative half period.It can be seen that there are two diodes and switch in each cycle from above figure 2 and Fig. 3
Power sources in series participates in work：The L of exchange input flows to the "+" of Switching Power Supply through D1 during alternating current positive half cycle, passes through switch electricity
Source, the N of exchange input is returned to by D3；As shown in Figure 2.Alternating current negative half period flows to Switching Power Supply for the N of exchange input through D2
"-", the L for returning to exchange input after the electric current of negative half period through D4 is provided for Switching Power Supply, as shown in Figure 3.
So during normal work, " single-phase rectification bridge stack " each cycle seals in current loop as switch by two diodes
Power supply provides electric current, and due to the voltage-current characteristic of diode, electric current has pressure drop V when flowing through diodeF, so diode
It is " P that power consumption can be produced in normal workD=VF*Iin", and VFWith IinIt is proportional.So this power consumption is in high-power input
Or during the electricity input of relatively low input AC, with IinValue increase, then have
“PD↑=VF↑*Iin↑ " power consumption rises, the temperature of rectifying tube can raise, another " single-phase rectification bridge stack " temperature characterisitic, electricity
Stream voltage limits can reduce with the rise of temperature, and being selected for this can cause cost to waste during device according to surplus is reserved.And
After single rectifier bridge is selected, finite volume, area of dissipation is limited, and the increase of power consumption will aggravate the concentration of heat, it is difficult to be led
Go out, increase the design difficulty of radiating.
Utility model content
The utility model is directed to the preposition rectification circuit of current Switching Power Supply, the deficiency that option is difficult, radiating is difficult, there is provided a kind of
New rectification circuit.
The utility model is that technical scheme is used by realizing its technical purpose：A kind of rectification circuit, it is arranged on exchange
Between input circuit and switching power circuit, the input for carrying out rectification and being input to Switching Power Supply is inputted to exchange, including it is single-phase
Rectifier bridge stack BR1, it is characterised in that：Also include single-phase rectification bridge stack BR2；Described single-phase rectification bridge stack BR1 and single-phase rectifier
Bridge heap BR2 the 1st pin and the 3rd equal short circuit of pin；The described pin of single-phase rectification bridge stack BR1 the 2nd and the pin of single-phase rectification bridge stack BR2 the 2nd
Short circuit, the described pin of single-phase rectification bridge stack BR1 the 4th and the pin short circuits of single-phase rectification bridge stack BR2 the 4th；Described ac input circuit
L lines connect described single-phase rectification bridge stack BR1 the 1st pin, the N lines of described ac input circuit and connect described single-phase rectification bridge
Heap BR2 the 1st pin；Described single-phase rectification bridge stack BR1 and single-phase rectification bridge stack BR2 the 2nd pin with described Switching Power Supply
Electrode input end is connected, described Switching Power Supply negative input and described single-phase rectification bridge stack BR1 and single-phase rectification bridge stack
BR2 the 4th pin is connected.
The utility model is applied successfully, and the power consumption for solving power supply script when high current works is concentrated, heat dissipation design work
The problem of skill difficulty is big.And when solving problem above, parts selection advantage is added, improves the instream factor of device.
Below with reference to drawings and examples, the utility model is described in detail.
Brief description of the drawings
Fig. 1 is current Switching Power Supply input rectification circuit schematic diagram.
Fig. 2 represents current Switching Power Supply input rectification circuit current direction schematic diagram in the positive half cycle of civil power.
Fig. 3 represents current Switching Power Supply input rectification circuit current direction schematic diagram in civil power negative half period.
Fig. 4 is the rectification circuit schematic diagram of the utility model embodiment.
The rectification circuit of Fig. 5 expression utility model embodiments current direction schematic diagram in the positive half cycle of civil power.
The rectification circuit of Fig. 6 expression utility model embodiments current direction schematic diagram in civil power negative half period.
Embodiment
For embodiment 1 as shown in figure 4, the present embodiment is a kind of input rectification circuit of Switching Power Supply, it is whole by electric main
Flow into direct current to use for Switching Power Supply, as shown in figure 4, it has two single-phase rectification bridge stacks, divide otherwise known as BR1 and BR2, it connects
It is connected between electric main input circuit and the input of Switching Power Supply, whether in the case of positive half cycle or negative half period, electricity
Stream is to be exported from the positive pole input of Switching Power Supply from negative pole.
Its connected mode is：BR1 and BR2 the 1st pin and the 3rd equal short circuit of pin, BR1 the 2nd pin and the of BR2
2 pin short circuits, BR1 the 2nd pin and BR2 the 4th pin short circuit.The L lines of civil power connect BR1 the 1st pin, and the of BR1 and BR2
2 pins connect the input positive pole of Switching Power Supply, and the input negative pole of Switching Power Supply connects BR1 and BR2 4 pins, and BR2 1,3 pins connect
The N lines of civil power.
As shown in figure 4, " single-phase rectification bridge stack " BR1 1 pin connects with 3 pin, then is connected to the L ends of exchange input, it is " single-phase whole
Stream bridge heap " BR2 1 pin connects with 3 pin, then is connected to the N-terminal that exchange inputs, " single-phase rectification bridge stack " BR1 2 pin with it is " single-phase whole
Stream bridge heap " BR2 2 pin connect, then are connected to the "+" of Switching Power Supply, " single-phase rectification bridge stack " BR1 4 pin and " single-phase rectifier
Bridge heap " BR2 4 pin connect, then are connected to the "-" of Switching Power Supply.It is as follows when working properly：
As shown in figure 5, L into the BR1 of exchange input 1 and 3 pin flow through BR1 D1, D2 during alternating current positive half cycle, then from
BR1 1 pin flows to the "+" of Switching Power Supply, passes through Switching Power Supply, and 4 pin for returning to BR2 flow through BR1 D3, D4, then from BR2's
2 return to the N for exchanging input with 3 pin.As shown in fig. 6, alternating current negative half period flows through for the N of exchange input into the 2 of BR2 with 3 pin
BR2 D1, D2, then the "-" of Switching Power Supply is flowed to from BR2 1 pin, the electric current of negative half period is provided for Switching Power Supply, flows through switch
Power supply, 4 pin for returning to BR1 flow through BR1 D3, D4, then return to the N for exchanging input with 3 pin from the 2 of BR1.
The circuit advantage of the present embodiment：
During normal work, each exchange input cycle respectively by two diodes in parallel in " single-phase rectification bridge stack " after,
Current loop is sealed in again.Single " single-phase rectification bridge stack " only flows through the current loop of half, equivalent to " single-phase rectification bridge stack " only
There is the diode power consumption of half in total switching process, diode power consumption can be uniformly distributed in dissipating for two single-phase rectification bridge stacks
On hot face, reduce heat dissipation design pressure.The decline of single single-phase rectification bridge stack power consumption simultaneously, temperature can be reduced, increase device
The instream factor of part.And it can be shunted because each current direction is by two diodes in parallel, during diodes in parallel, same Iin
In the case of VFIt can diminish, so power consumption P nowDAlso can reduce, so this circuit can further reduce rectifier loss PD。
Claims (1)
1. a kind of rectification circuit, is arranged between ac input circuit and switching power circuit, it is defeated that progress rectification is inputted to exchange
Enter the input to Switching Power Supply, including single-phase rectification bridge stack BR1, it is characterised in that：Also include single-phase rectification bridge stack BR2；Institute
The single-phase rectification bridge stack BR1 and single-phase rectification bridge stack BR2 the 1st pin that state and the 3rd equal short circuit of pin；Described single-phase rectification bridge stack
The pin of BR1 the 2nd and the pin short circuits of single-phase rectification bridge stack BR2 the 2nd, the described pin of single-phase rectification bridge stack BR1 the 4th and single-phase rectification bridge stack
The pin short circuits of BR2 the 4th；The L lines of described ac input circuit connect described single-phase rectification bridge stack BR1 the 1st pin, described exchange
The N lines of input circuit connect described single-phase rectification bridge stack BR2 the 1st pin；Described single-phase rectification bridge stack BR1 and single-phase rectification bridge
Heap BR2 the 2nd pin is connected with described Switching Power Supply electrode input end, described Switching Power Supply negative input with it is described
Single-phase rectification bridge stack BR1 is connected with single-phase rectification bridge stack BR2 the 4th pin.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620847647 | 2016-08-08 | ||
| CN2016208476472 | 2016-08-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206686097U true CN206686097U (en) | 2017-11-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720343433.6U Active CN206686097U (en) | 2016-08-08 | 2017-04-03 | A kind of rectification circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206686097U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110880878A (en) * | 2019-12-13 | 2020-03-13 | 浙江禾川科技股份有限公司 | Power supply system and rectifying circuit thereof |
-
2017
- 2017-04-03 CN CN201720343433.6U patent/CN206686097U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110880878A (en) * | 2019-12-13 | 2020-03-13 | 浙江禾川科技股份有限公司 | Power supply system and rectifying circuit thereof |
| WO2021114417A1 (en) * | 2019-12-13 | 2021-06-17 | 浙江禾川科技股份有限公司 | Power supply system and rectifier circuit thereof |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP02 | Change in the address of a patent holder | ||
| CP02 | Change in the address of a patent holder |
Address after: 518000 Floors 1-3 and 1-5 of Block A, Block B2, Jinweiyuan Industrial Plant, Longshan District, Pingshan New District, Shenzhen City, Guangdong Province Patentee after: Shenzhen Gold Power Technology Co., Ltd. Address before: 518000 Shenzhen, Guangdong, Pingshan new industrial zone, poly dragon hill area Jinwei Industrial Zone A 1 floor. Patentee before: Shenzhen Gold Power Technology Co., Ltd. |