CN104980008A - Improved AC and DC universal switching power supply circuit structure - Google Patents
Improved AC and DC universal switching power supply circuit structure Download PDFInfo
- Publication number
- CN104980008A CN104980008A CN201510398214.3A CN201510398214A CN104980008A CN 104980008 A CN104980008 A CN 104980008A CN 201510398214 A CN201510398214 A CN 201510398214A CN 104980008 A CN104980008 A CN 104980008A
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- power supply
- transformer
- switching power
- rectifier
- switch
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Abstract
The invention discloses an improved AC and DC universal switching power supply circuit structure, which comprises an AC-to-DC switching power supply module, a DC-to-DC switching power supply module, a transformer, a rectifier and an output backward-stage filter element. The AC-to-DC switching power supply module and the DC-to-DC switching power supply module are both connected to the same transformer, the rectifier and the output backward-stage filter element. According to the technical scheme of the invention, a universal AC-DC/DC-DC power supply can be commonly used for the transformer, the rectifier and all other subsequent elements. The size, the weight, the cost and the efficiency of the structure are greatly optimized. Meanwhile, when an AC power supply and a DC power supply are input at the same time, only one power supply is automatically selected to be put to use.
Description
Technical field
The application relates to the circuit structure of Switching Power Supply, specifically the circuit topological structure of a kind of AC-DC/DC-DC AC/DC universal Switching Power Supply common transformer, rectifier and all elements of output.
Background technology
In Switching Power Supply, AC inputs when DC exports and should need a transformer: field of switch power wherein practical isolation comprise this several topology (normal shock, Cuk, recommends, symmetrical half bridge, resonance oscillation semi-bridge, symmetrical full-bridge, resonant full bridge for RCC, flyback); In Switching Power Supply, DC inputs when DC exports and should need a transformer or inductance: field of switch power wherein practical shape non-isolated comprise this several topology (step-down, boosting, buck, Cuk, Zeta, Sepic).Because AC-DC/DC-DC is two kinds of different structures, be all separately process in current industry application, the element in different topology cannot be shared, the subelement that at most also just DC exports after secondary commutation: as done the power supply of an AC-DC/DC-DC AC/DC universal.AC-DC part is generally RCC, flyback, normal shock, symmetrical half bridge, and the conversion of the topological realization AC-DC such as LLC resonance oscillation semi-bridge reaches and exports specification requirement needed for DC; DC-DC part is generally step-down, boosting, buck, and the conversion of the topological realization DC-DC such as Sepic reaches and exports specification requirement needed for DC.Secondary electric capacity and inductance is shared respectively by after respective topological rectification.
Therefore, existing traditional AC-DC/DC-DC AC/DC universal power supply can only share the element after rectification, and circuit power element is many, and volume can not reduce, and weight can not alleviate, and cost is also high, and efficiency is also because the reason of topology itself and element loss cannot improve again.
Summary of the invention
For the problems referred to above, the application aim to provide a kind of can common transformer, rectifier, all elements of output AC/DC universal switch power supply line structure.
For realizing this technical purpose, the scheme of the application is: a kind of AC/DC universal switch power supply line structure of improvement, comprise the filtering device of the switch power module of AC-DC (AC-DC), the switch power module of DC-DC (DC-to-DC), transformer, rectifier and output rear class, the switch power module of the AC-DC (AC-DC) in described circuit structure and the switch power module of DC-DC (DC-to-DC) are all connected to the filtering device of identical transformer, rectifier and output rear class.
Improve more specifically, described circuit structure is AC-DC/DC-DC boost configuration, and this structure seals in a control switch between the negative terminal of secondary output winding and the filter capacitor negative pole of filtering device of transformer.
Improve more specifically, described circuit structure is AC-DC/DC-DC buck 1 structure, and this structure is drawn by element or cabling at the two ends of the secondary output winding of transformer, and the connection mode optimizing DC-DC element does the inductance use circuit of DC-DC buck 1.
Improve more specifically, described circuit structure is AC-DC/DC-DC buck 2 structure, and this structure is drawn by element or cabling at the two ends of the secondary output winding of transformer, and the connection mode optimizing DC-DC element does the inductance use circuit of DC-DC buck 2.
Improve more specifically, described circuit structure is AC-DC/DC-DC buck configuration, and this structure is drawn by element or cabling at the two ends of the secondary output winding of transformer, and the connection mode optimizing DC-DC element does the inductance use circuit of DC-DC step-down.
Further concrete improvement, described control switch can be rectifier diode, transistor, metal-oxide-semiconductor, IGBT pipe, controllable silicon, relay, toggle switch, electronic switch and button.
The AC-DC/DC-DC alternating current-direct current common source of this programme can share transformer and rectifier and all elements below; No matter be volume, weight, cost, efficiency has optimization all greatly; Also wherein a kind of power work automatically can be selected when AC/DC inputs simultaneously.
Accompanying drawing explanation
Fig. 1 is AC-DC (flyback)/DC-DC (boosting) circuit diagram.
Embodiment
The control method of AC-DC/DC-DC (boosting) common transformer, rectifier and all elements of output: only need seal in a control switch between the negative terminal of secondary output winding and filter capacitor negative pole.This control switch switch when AC-DC is open-minded, the switch OFF when DC-DC.This switch can use rectifier diode, and all devices that can be used for doing switch control rule such as transistor, metal-oxide-semiconductor, IGBT pipe, controllable silicon, relay, toggle switch, electronic switch and button realize.Use during rectifier diode and just seal in wherein, can rectifier diode be reduced withstand voltage, the Vf value of reduction own, use the rectifier that Vf is less, strengthen heat radiation; Use during metal-oxide-semiconductor and just seal in wherein, rectifier diode can be reduced further withstand voltage, the Vf value of further reduction own, electric current, rectifier that Vf value is less can be used, strengthen heat radiation, raise the efficiency; Use during one-way SCR and just seal in wherein, more can reduce rectifier diode further withstand voltage, the Vf value of further reduction own, use electric current, the rectifier that Vf value is less, strengthen heat radiation, efficiency improves further; Relay is closed by switch during control realization AC-DC, and DC-DC switch disconnects.AC-DC/DC-DC (buck 1), AC-DC/DC-DC (buck 2), AC-DC/DC-DC (step-down) are realized by the different connections of circuit, and circuit theory is the same with traditional.Power operation after this type of improvement is the same with common power, and intuitive and convenient is simple.
As shown in Figure 1, be traditional AC-DC (flyback)/DC-DC (boosting) circuit diagram, S1, S2: control switch can be transistors, metal-oxide-semiconductor, and IGBT manages; VD1, VD2: rectifier can be diodes, metal-oxide-semiconductor, IGBT pipe, controllable silicon etc. all can be used for doing the device of rectification.Tradition AC/DC universal power supply: must to DC voltage after VD1 rectification CLC filtering when being coupled to through rectifying and wave-filtering transformer transformation after AC input; When DC input produces higher than DC input voltage through boost inductance (L1) and S2 switch, must to DC voltage after VD2 rectification CLC filtering.
Claims (2)
1. the AC/DC universal switch power supply line structure improved, comprise the filtering device of the switch power module of AC-DC, the switch power module of DC-DC, transformer, rectifier and output rear class, it is characterized in that: the switch power module of the AC-DC in described circuit structure and the switch power module of DC-DC are all connected to the filtering device of identical transformer, rectifier and output rear class.
2. AC/DC universal switch power supply line structure according to claim 1, is characterized in that: described circuit structure is AC-DC/DC-DC boost configuration, and this structure seals in a control switch between the negative terminal and filtering device of the secondary output winding of transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510398214.3A CN104980008A (en) | 2015-06-30 | 2015-06-30 | Improved AC and DC universal switching power supply circuit structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510398214.3A CN104980008A (en) | 2015-06-30 | 2015-06-30 | Improved AC and DC universal switching power supply circuit structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104980008A true CN104980008A (en) | 2015-10-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510398214.3A Pending CN104980008A (en) | 2015-06-30 | 2015-06-30 | Improved AC and DC universal switching power supply circuit structure |
Country Status (1)
| Country | Link |
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| CN (1) | CN104980008A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107248820A (en) * | 2017-08-11 | 2017-10-13 | 株洲宏达微电子科技有限公司 | AC DC and DC DC two-way switch power supplys application circuit |
| CN107276437A (en) * | 2017-08-11 | 2017-10-20 | 株洲宏达微电子科技有限公司 | The circuit of power magnetic device is shared applied to AC DC/DC DC |
-
2015
- 2015-06-30 CN CN201510398214.3A patent/CN104980008A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107248820A (en) * | 2017-08-11 | 2017-10-13 | 株洲宏达微电子科技有限公司 | AC DC and DC DC two-way switch power supplys application circuit |
| CN107276437A (en) * | 2017-08-11 | 2017-10-20 | 株洲宏达微电子科技有限公司 | The circuit of power magnetic device is shared applied to AC DC/DC DC |
| CN107248820B (en) * | 2017-08-11 | 2024-02-06 | 湖南宏微电子技术有限公司 | Application circuit of AC-DC and DC-DC dual-purpose switch power supply |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| DD01 | Delivery of document by public notice |
Addressee: Dan Yunfeng Document name: Notification of Publication of the Application for Invention |
|
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20151014 |