CN101340154A - Transforming rectifying output circuit for DC switch power source - Google Patents
Transforming rectifying output circuit for DC switch power source Download PDFInfo
- Publication number
- CN101340154A CN101340154A CNA2008101506335A CN200810150633A CN101340154A CN 101340154 A CN101340154 A CN 101340154A CN A2008101506335 A CNA2008101506335 A CN A2008101506335A CN 200810150633 A CN200810150633 A CN 200810150633A CN 101340154 A CN101340154 A CN 101340154A
- Authority
- CN
- China
- Prior art keywords
- transformers
- current
- transformer
- switch power
- power supply
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Rectifiers (AREA)
Abstract
The invention relates to a transformation rectified output circuit for a direct current switch power supply. The circuit comprises a plurality of transformers with the same turn-ratio, primary side coils of the transformers are connected together in series, and a secondary side coil of each transformer is respectively connected with a diode rectifier. The circuit utilizes the serial connection of the primary sides of the transformers, the high-frequency current in the primary side coils of the transformers maintains consistent, then the high-frequency current which is induced by the secondary side coils of the transformers is mutually consistent by utilizing the same turn-ratio of the transformers according to the principle that the current of the primary sides of the transformers is strictly equal to the current of the secondary sides of the transformers divided by the turn-ratio, thereby realizing the reliable shunt uniformity constancy. Compared with a high-frequency diode with the consistent voltage of a selection end, the transformer rectifier output circuit can be easily realized; furthermore, the shunt uniformity constancy is good, the reliability is high, the manufacturing is simple, the cost is not increased, and the circuit can better solve the problem of shunt uniformity and constancy of the high power output in the switch power supply and can greatly improve the reliability of the output of the high power switch power supply.
Description
Technical field
The present invention relates to a kind of direct-current switch power supply, relate in particular to the transforming rectifying output circuit that is used for direct-current switch power supply.
Background technology
Direct-current switch power supply is a kind of novel power conversion unit that occurs in recent years.Its working method is that AC-DC-AC-directly, promptly elder generation becomes direct current with the 50Hz low-frequency ac rectifying and wave-filtering of electrical network, again dc inversion is become high-frequency ac, then the high-frequency ac rectifying and wave-filtering is become direct current output.So wherein the transformation efficient of high-frequency alternating current in transformer exchanges high a lot than 50Hz low frequency electrical network. transformer can be done very for a short time, therefore, compares with traditional phase-controlled power, and it has little, the lightweight advantage of volume, so developed in recent years.At present, direct-current switch power supply often needs to realize high-power output with the rectifier diode of a plurality of parallel connections in transforming rectifying output circuit owing to be subjected to the rated power restriction of high-frequency rectification diode.Fig. 3 for example, this is an a direct-current switch power supply a kind of high-power transformation output circuit commonly used, wherein the primary coil of transformer T flows through the high-frequency current of inversion, its secondary coil induction output high-frequency current, after the equal permanent shunting and full-wave rectification through the negative sense rectifier diode D2 of the forward rectifier diode D1 of one group of parallel connection and one group of parallel connection, export direct current through LC filtering again.In this output circuit,, just realized high-power output because the high-frequency current that a plurality of diode connected in parallel induce the transformer secondary has carried out equal permanent shunting.But, this equal permanent shunting is very high to the coherence request of rectifier diode terminal voltage in parallel, that is to say to have only their terminal voltage unanimity, the shunt current that could guarantee to flow through in each parallel diode reaches equal perseverance and does not exceed its rated power, thereby guarantees the reliable output of DC power supply.In order to reach the terminal voltage unanimity of parallel diode, the most common and most popular method is a screening method, promptly in numerous high-frequency diode devices selecting side voltage unanimity carry out parallel connection.This method not only can increase greatly to be made and purchase cost, and the device subtle difference still can not be eliminated, this subtle difference still can cause the trickle uneven permanent of each shunt current, under special circumstances, draw when inclined to one side as electric power system, high-frequency diode is operated in the critical of its rated power, and this trickle uneven perseverance probably causes individual devices to surpass its rated power and burns out.Another kind of commonly used method is the method for diode series resistance, and promptly the current limliting by resistance guarantees to flow through diode current and is no more than its power-handling capability, but work can bring extra resistance loss like this.
Summary of the invention
The objective of the invention is in order to overcome the shortcoming of prior art, a kind of improved transforming rectifying output circuit that is used for direct-current switch power supply is provided, make it in the situation that does not increase cost and extra resistance loss, it is all permanent to reach reliable shunting, improves output reliability.
For achieving the above object, technical scheme of the present invention is as follows:
It comprises a plurality of transformers with identical turn ratio, the primary coil of described a plurality of transformers is cascaded, and the two ends of series connection primary coil are as the input of high-frequency inversion electric current, and each is connected to a diode rectifier respectively the secondary coil of described a plurality of transformers.
Further improved technical scheme of the present invention is as follows:
Described diode rectifier is a full-wave rectifier.
By technique scheme as can be seen, the present invention replaces a high-power transformer with the identical wattage transformer of a plurality of turn ratios, and utilize the series connection on former limit, make by the high-frequency current in each transformer primary coil and be consistent, strictness equals the principle of transformer secondary current divided by turn ratio according to the transformer primary current again then, utilize the identical turn ratio of each transformer, the high-frequency current that each transformer secondary coil is induced is consistent with each other, thereby has realized that reliable shunting is all permanent.It not only realizes much easier than the high-frequency diode of selecting side voltage unanimity, and the shunting constant character is good, the reliability height, make simple, do not increase cost, preferably resolve the equal permanent problem of the shunting of high-power output in the Switching Power Supply, improved the reliability of high power switching power supply output greatly.
Description of drawings
Fig. 1, circuit theory diagrams of the present invention.
Fig. 2, transformer connect the circuit theory diagrams of bridge rectifier.
The schematic diagram of Fig. 3, existing transforming rectifying output circuit.
Embodiment
Referring to Fig. 1, this output circuit has a plurality of wattage transformer T1～TN, and the power sum of this wattage transformer equals the power of a high-power transformer, and these a plurality of wattage transformers have identical turn ratio N
S/ N
F, the primary coil of these a plurality of transformer T1～TN is cascaded, and two ends 1,2 inputs as the high-frequency inversion electric current of series connection primary coil, and like this, the turn ratio of each transformer just becomes N * N
S/ N
FBecause the series connection of each transformer primary coil, when the high-frequency inversion electric current is imported, what each primary coil flow through is same input current, according to transformer principle as can be known, in ideal transformer, the strictness of transformer primary current equals the transformer secondary current divided by turn ratio, so the electric current of each secondary coil induction output is consistent with each other.In real transformer, not exclusively equate between transformer primary current and the secondary current divided by turn ratio, exist a small difference between the two, the exciting current of Here it is transformer, but in transformer manufacturing process, the excitation reactance that can guarantee transformer usually is very big, make exciting current compare very little with former secondary current, can ignore, therefore, real transformer also can reach the transformer primary current and equal the transformer secondary current divided by turn ratio, thereby has guaranteed the equal perseverance of each secondary current.
Again referring to Fig. 1, be connected to a diode rectifier on described each secondary coil respectively, this diode rectifier can be half-wave rectifier (promptly being serially connected in forward or negative sense rectifier diode on the secondary coil output), full-wave rectifier or full-bridge rectifier.The diode rectifier 3 that provides among the figure is two-way full-wave rectifiers, this rectifier 3 is made of the tap 3-3 of transformer secondary coil and a forward rectifier diode 3-1 and a negative sense rectifier diode 3-2 of being serially connected in transformer secondary coil two ends respectively, the tap of each transformer all is connected in parallel, output negative terminal 4 as each rectifier, the rectification output end of each forward and negative sense rectifier diode also all is connected in parallel, public output plus terminal 5 as each rectifier, the public output of described each rectifier just, negative 5,4 and LC filters 6 join, and by LC filter filtering output direct current.This output circuit also can adopt the circuit structure of bridge rectifier shown in Figure 27.Because each secondary current has reached equal perseverance, so the rated power of each rectifier diode can be selected as required, always works within the rated power scope to guarantee it, has improved output reliability greatly.
Claims (2)
1, a kind of transforming rectifying output circuit that is used for direct-current switch power supply, it is characterized in that: it comprises a plurality of transformers with identical turn ratio (T1～TN), (primary coil of T1～TN) is cascaded described a plurality of transformer, and the two ends (1,2) of series connection primary coil are as the input of high-frequency inversion electric current, and (each is connected to a diode rectifier respectively the secondary coil of T1～TN) to described a plurality of transformers.
2, the transforming rectifying output circuit that is used for direct-current switch power supply according to claim 1 is characterized in that: described diode rectifier is full-wave rectifier (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101506335A CN101340154A (en) | 2008-08-15 | 2008-08-15 | Transforming rectifying output circuit for DC switch power source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101506335A CN101340154A (en) | 2008-08-15 | 2008-08-15 | Transforming rectifying output circuit for DC switch power source |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101340154A true CN101340154A (en) | 2009-01-07 |
Family
ID=40214139
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008101506335A Pending CN101340154A (en) | 2008-08-15 | 2008-08-15 | Transforming rectifying output circuit for DC switch power source |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101340154A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103248243A (en) * | 2013-05-20 | 2013-08-14 | 镇江天力变压器有限公司 | High-frequent dual-splitting rectifying transformer |
| CN103280869A (en) * | 2013-06-14 | 2013-09-04 | 上海申传电气股份有限公司 | Mining explosive-proof and intrinsically safe battery charger |
| CN104426379A (en) * | 2013-08-23 | 2015-03-18 | 西门子公司 | Converter circuit and method for running converter circuit |
| CN109818414A (en) * | 2019-03-15 | 2019-05-28 | 谢志和 | A kind of power-supply system of AC-DC conversion |
| CN111082685A (en) * | 2018-10-22 | 2020-04-28 | 株式会社东芝 | Power conversion device |
| CN112908653A (en) * | 2021-02-02 | 2021-06-04 | 浙江工业大学之江学院 | Distributed transformer and application circuit thereof |
| CN114994395A (en) * | 2022-08-05 | 2022-09-02 | 成都国佳电气工程有限公司 | Passive railway high-voltage cable related current detection device |
-
2008
- 2008-08-15 CN CNA2008101506335A patent/CN101340154A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103248243A (en) * | 2013-05-20 | 2013-08-14 | 镇江天力变压器有限公司 | High-frequent dual-splitting rectifying transformer |
| CN103280869A (en) * | 2013-06-14 | 2013-09-04 | 上海申传电气股份有限公司 | Mining explosive-proof and intrinsically safe battery charger |
| CN104426379A (en) * | 2013-08-23 | 2015-03-18 | 西门子公司 | Converter circuit and method for running converter circuit |
| CN104426379B (en) * | 2013-08-23 | 2018-10-12 | 西门子公司 | Converter circuit and method for running this kind of converter circuit |
| CN111082685A (en) * | 2018-10-22 | 2020-04-28 | 株式会社东芝 | Power conversion device |
| JP2020068559A (en) * | 2018-10-22 | 2020-04-30 | 株式会社東芝 | Power converter |
| JP7328748B2 (en) | 2018-10-22 | 2023-08-17 | 株式会社東芝 | power converter |
| CN109818414A (en) * | 2019-03-15 | 2019-05-28 | 谢志和 | A kind of power-supply system of AC-DC conversion |
| CN112908653A (en) * | 2021-02-02 | 2021-06-04 | 浙江工业大学之江学院 | Distributed transformer and application circuit thereof |
| CN112908653B (en) * | 2021-02-02 | 2021-11-09 | 浙江工业大学之江学院 | Distributed transformer and application circuit thereof |
| CN114994395A (en) * | 2022-08-05 | 2022-09-02 | 成都国佳电气工程有限公司 | Passive railway high-voltage cable related current detection device |
| CN114994395B (en) * | 2022-08-05 | 2022-12-06 | 成都国佳电气工程有限公司 | Passive railway high-voltage cable related current detection device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| TW561672B (en) | DC/DC conversion method and the converter thereof | |
| CN101340154A (en) | Transforming rectifying output circuit for DC switch power source | |
| CN102239632A (en) | Voltage control and power factor correction in AC induction motors | |
| US10048325B2 (en) | Switching power supply burn in test circuit | |
| CN107171578B (en) | Two Stages type AC-DC electric power electric transformer | |
| CN104994664B (en) | A kind of single-stage buck type LED drive circuit of leakage inductance energy feedback | |
| CN111030314A (en) | Carrier rocket ground high-power wireless power supply system based on electromagnetic resonance | |
| CN101877539B (en) | Power converter and input/output frequency conversion method | |
| CN105827134B (en) | Multipath magnetic circuit low-voltage, high-current digital AC constant-current source | |
| CN107222096A (en) | Isolated CUK push-pull topologies in parallel | |
| CN103765754B (en) | There is the invertor of coupling inductance | |
| CN204700414U (en) | A kind of electric welding machine circuit of APFC | |
| CN104682733B (en) | Flyback type alternating-current and direct-current conversion device and conversion method thereof | |
| WO2014173033A1 (en) | Receiving end and system and receiving method for wireless power transmission | |
| KR102192021B1 (en) | Sepic converter with galvanic isolation for single-phase power factor correction | |
| CN100459387C (en) | Switching power supply circuit | |
| CN104578750B (en) | A kind of offset-type power supply | |
| CN205792250U (en) | Dual input Switching Power Supply | |
| CN102447403A (en) | Three-phase rectifier circuit with low harmonic wave continuous input current | |
| CN114826006A (en) | Power supply circuit, welding power supply and electric welding machine | |
| CN104638947A (en) | Isolation type alternating current and direct current conversion device and conversion method thereof | |
| CN202750315U (en) | Magnetron filament power supply circuit | |
| CN108023484B (en) | A kind of multi-modal high-frequency resonant charging circuit | |
| Jadhav et al. | Design and Implementation of Resonance based Wireless Power Transfer System | |
| CN209313727U (en) | A kind of shared doubleway output voltage-stabilizing switch power source of power |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20090107 |