CN207968330U - A kind of isolation power supply circuit - Google Patents
A kind of isolation power supply circuit Download PDFInfo
- Publication number
- CN207968330U CN207968330U CN201820149321.1U CN201820149321U CN207968330U CN 207968330 U CN207968330 U CN 207968330U CN 201820149321 U CN201820149321 U CN 201820149321U CN 207968330 U CN207968330 U CN 207968330U
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- Prior art keywords
- power supply
- auxiliary transformer
- isolation
- mos switch
- pwm signal
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- 238000002955 isolation Methods 0.000 title claims abstract description 18
- 238000004804 winding Methods 0.000 claims abstract description 11
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 claims abstract description 7
- 230000005611 electricity Effects 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- HEZMWWAKWCSUCB-PHDIDXHHSA-N (3R,4R)-3,4-dihydroxycyclohexa-1,5-diene-1-carboxylic acid Chemical compound O[C@@H]1C=CC(C(O)=O)=C[C@H]1O HEZMWWAKWCSUCB-PHDIDXHHSA-N 0.000 description 1
- 241000208340 Araliaceae Species 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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Abstract
The utility model is related to a kind of isolation power supply circuits, including auxiliary transformer, MOS switch, rectifier diode and capacitance, the first winding of the auxiliary transformer connects pwm signal generation device, the secondary winding of the auxiliary transformer connects two branches, it is connect all the way with MOS switch, MOS switch is controlled by the isolation pwm signal that auxiliary transformer generates, another way is connected with the rectifier diode being serially connected with capacitance so that the alternating current flat turn in isolation pwm signal turns to isolated power supply.The utility model generates PWM waveform control MOS switch all the way using an auxiliary transformer and switches, make full use of the energy being loaded in PWM waveform simultaneously, energy is converted into DC power supply by diode and capacitance, supply electricity to the use of transformer secondary device, when PWM is generated, by transformer isolating signal, while generating isolated power supply；The utility model is simple in structure, at low cost.
Description
Technical field
The utility model is related to power supply provisioning technique more particularly to a kind of isolation power supply circuits.
Background technology
Seldom transformer secondary device is supplied electricity in existing circuit design by pwm signal to use, even if using isolation
Pwm signal provides isolated power supply, typically increases isolation DC/DC electricity all the way in the circuit of the secondary winding of auxiliary transformer
Source module, circuit structure so increase cost, increase control circuit due to increasing DCDC power modules all the way.
Invention content
In order to solve the above technical problems, the purpose of this utility model is to provide a kind of simple in structure, it is at low cost every
From power supply circuit.
In order to realize that above-mentioned purpose of utility model, the utility model use technical solution below：
A kind of isolation power supply circuit, including auxiliary transformer, MOS switch, rectifier diode and capacitance, the auxiliary transformation
The first winding of device connects pwm signal generation device, and the secondary winding of the auxiliary transformer connects two branches, all the way with
MOS switch connects, and MOS switch, another way and the rectification being serially connected are controlled by the isolation pwm signal that auxiliary transformer generates
Diode is connected with capacitance so that the alternating current flat turn in isolation pwm signal turns to isolated power supply.
Preferably：It is also associated between the first winding for stating auxiliary transformer and pwm signal generation device
Driving chip.
The utility model generates PWM waveform control MOS switch all the way using an auxiliary transformer and switches, while fully profit
With the energy being loaded in PWM waveform, energy is converted into DC power supply by diode and capacitance, supplies electricity to transformer secondary device
Part uses, and when PWM is generated, by transformer isolating signal, while generating isolated power supply；The utility model is simple in structure, at
This is low.
Description of the drawings
Fig. 1 is the electrical block diagram of the utility model.
Fig. 2 is the operation principle block diagram of the utility model.
Specific implementation mode
The embodiments of the present invention are described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning
Same or similar element or element with the same or similar functions are indicated to same or similar label eventually.Below by ginseng
The embodiment for examining attached drawing description is exemplary, it is intended to for explaining the utility model, and should not be understood as to the utility model
Limitation.
A kind of isolation power supply circuit as depicted in figs. 1 and 2, including auxiliary transformer 2, MOS switch 3, rectifier diode 4
With capacitance 5, the first winding of the auxiliary transformer 2 connects pwm signal generation device, the auxiliary transformer 2 it is secondary around
Group two branches of connection, connect with MOS switch 3 all the way, and MOS switch is controlled by the isolation pwm signal that auxiliary transformer 2 generates
3, another way is connected with the rectifier diode 4 being serially connected with capacitance 5 so that the exchange level translation in isolation pwm signal
For isolated power supply.It is also associated with driving chip 1 between the first winding for stating auxiliary transformer 2 and pwm signal generation device.
Driving chip can greatly improve the driving capability of circuit.The embodiment of the utility model is generated all the way using an auxiliary transformer
PWM waveform controls MOS switch switching, while making full use of the energy being loaded in PWM waveform, and energy is passed through diode and capacitance
It is converted into DC power supply, the use of transformer secondary device is supplied electricity to, when PWM is generated, by transformer isolating signal, produces simultaneously
Raw isolated power supply；The utility model is simple in structure, at low cost.
It should be pointed out that above example is only the representative example of the utility model.The utility model can also there are many
Deformation.Every essence according to the utility model is to any simple modification, equivalent change and modification made by above example,
It is considered as belonging to the scope of protection of the utility model.
Claims (2)
1. a kind of isolation power supply circuit, it is characterised in that：Including auxiliary transformer (2), MOS switch (3), rectifier diode (4)
Pwm signal generation device is connected with the first winding of capacitance (5), the auxiliary transformer (2), the auxiliary transformer (2)
Secondary winding connects two branches, is connect all the way with MOS switch (3), the isolation pwm signal generated by auxiliary transformer (2)
MOS switch (3) is controlled, another way is connected with the rectifier diode (4) being serially connected with capacitance (5) so that isolation pwm signal
In alternating current flat turn turn to isolated power supply.
2. a kind of isolation power supply circuit according to claim 1, it is characterised in that：The auxiliary transformer (2) it is primary
Driving chip (1) is also associated between winding and pwm signal generation device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820149321.1U CN207968330U (en) | 2018-01-29 | 2018-01-29 | A kind of isolation power supply circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820149321.1U CN207968330U (en) | 2018-01-29 | 2018-01-29 | A kind of isolation power supply circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207968330U true CN207968330U (en) | 2018-10-12 |
Family
ID=63735678
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820149321.1U Active CN207968330U (en) | 2018-01-29 | 2018-01-29 | A kind of isolation power supply circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207968330U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112305305A (en) * | 2020-02-21 | 2021-02-02 | 贵州电网有限责任公司 | Isolation processing system between two cores of modular electric energy meter |
-
2018
- 2018-01-29 CN CN201820149321.1U patent/CN207968330U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112305305A (en) * | 2020-02-21 | 2021-02-02 | 贵州电网有限责任公司 | Isolation processing system between two cores of modular electric energy meter |
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|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 311122, 2nd Floor, Building 3, No. 35 Xianxing Road, Xianlin Street, Yuhang District, Hangzhou City, Zhejiang Province Patentee after: Hangzhou Gaote New Energy Co.,Ltd. Country or region after: China Address before: No. 86 Landscape Avenue, Qingshanhu Street, Lin'an City, Hangzhou City, Zhejiang Province, 311305 Patentee before: HANGZHOU GOLD NEW ENERGY TECHNOLOGY CO.,LTD. Country or region before: China |