CN202135054U - DC multi power supply conversion apparatus - Google Patents
DC multi power supply conversion apparatus Download PDFInfo
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- CN202135054U CN202135054U CN201120233795U CN201120233795U CN202135054U CN 202135054 U CN202135054 U CN 202135054U CN 201120233795 U CN201120233795 U CN 201120233795U CN 201120233795 U CN201120233795 U CN 201120233795U CN 202135054 U CN202135054 U CN 202135054U
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Abstract
The utility model relates to a DC multi power supply conversion apparatus, which is characterized in that at least two paths of an adjusting circuit in parallel connection on the same work equipment and respectively connected with the corresponding DC sources are comprised; and each path of the adjusting circuit comprises an DC/AC inversion adjustable circuit, a high frequency isolation transformer and an AC/DC rectification circuit which are successively in series connection. According to the utility model, electric isolation of multi path DC sources is realized by using the high frequency isolation transformer; any path of input and output does not have electrical connection; the DC multi power supply conversion apparatus is safe and reliable; parallel connection simultaneous output is realized; power supply can be simultaneously provided for the work equipment; and zero switching time can be realized.
Description
[technical field]
The utility model relates to the treatment facility of the signal of telecommunication, is specifically related to the many power supply change-over devices of a kind of direct current.
[background technology]
Malfunctioning in order to prevent scattered control system (DCS); The accident that the protective system in heat power tripping causes; " preventing 25 important requirements of electrical production major accident " 12.1.3 bar: system power supply should be designed with reliable reserve means, and the switching time of stand-by power supply should be less than 5ms (should guarantee controller can not initialization).
Existing direct current duplicate supply is with the directly parallel connection of two-way DC power supply, forms storage battery circulation easily; Or as shown in Figure 1, DC power supply one is parallelly connected through diode with DC power supply two, and during operate as normal, K switch 1 is closed with K switch 2, is to have solved the two-way circulation problem on the surface, but does not have real electrical isolation.
State Grid Corporation of China is on the basis of former " preventing 25 important requirements of electrical production major accident "; Issued " 18 great anti-accident measures of electrical network of State Grid Corporation of China " 5.2.2 bar in 2005: dc bus should adopt the partition running mode; Every section bus is respectively by independently batteries power supply; And between two sections dc buss, interconnection switch being set, this switch is in open position when normally moving.
Directly the duplicate supply defective of parallel way is fatal, is parallel with following problem through diode: 1. search the DC earthing difficulty, violate 2. that grid company is counter arranges requirement, 3. cause the overvoltage of power supply unit to burn easily.
[utility model content]
The purpose of the utility model provides the many power supply change-over devices of a kind of direct current, can realize the isolation of the electricity of multi-channel dc power supply, and is safe and reliable, and zero switching time.
Above-mentioned purpose realizes through following technical scheme:
The many power supply change-over devices of a kind of direct current; It is characterized in that; Comprise that two-way is connected in parallel on the adjustment circuit that same working equipment also is connected with corresponding DC power supply respectively at least, every road adjustment circuit comprises DC/AC inversion conditioned circuit, high-frequency isolation transformer, the AC/DC rectification circuit of serial connection successively.
Further scheme is, said DC/AC inversion conditioned circuit adopts the full bridge inverter that is made up of four switching tubes.
Said switching tube is the IGBT module.
Be connected in series a fast recovery diode between the collector electrode of each said IGBT module and the emitter, the collector electrode of said IGBT module is connected with the positive pole of said fast recovery diode.
Further scheme is in addition, and said AC/DC rectification circuit adopts the full-wave bridge rectifier circuit that is made up of four rectifier diodes.
Two ends parallel connection one RC of each said rectifier diode absorbs circuit.
In addition further scheme is, said adjustment circuit also comprise one be arranged on the input of said DC/AC inversion conditioned circuit input filter circuit and be located at the defeated place filter circuit of the output of said AC/DC rectification circuit.
Said output filter circuit comprise one be serially connected in the output of said AC/DC rectification circuit filter inductance and be attempted by the filter capacitor of the output of said AC/DC rectification circuit.
Further scheme is that the output of the said adjustment circuit in every road is serially connected with a diode in addition.
Further scheme is again, also comprises a control module, and said control module connects the output of said adjustment circuit through current sensor, and said control module connects said DC/AC inversion conditioned circuit.
The utility model uses high-frequency isolation transformer to realize the isolation of the electricity of multi-channel dc power supply, and any one tunnel input and output all do not have electrical link, and are safe and reliable; Output realization parallel connection is exported simultaneously; To the working equipment power supply, can realize for zero switching time jointly, prevent the working equipment power down.The utility model can be controlled DC power supply through adjusted output voltage flexibly in time through control module and current sensor are set, and guarantees the steady operation of working equipment, and can realize that multi-channel dc power supply exports through adjusted current-sharing.
[description of drawings]
Fig. 1 is the structural representation of existing direct current duplicate supply;
Fig. 2 is DC power supply, the utility model and the sketch map that is connected of working equipment;
Fig. 3 is the adjustment circuit of DC power supply, the utility model and the sketch map that is connected of working equipment.
[embodiment]
As shown in Figures 2 and 3; The utility model comprises that two-way is connected between DC power supply 100 and the working equipment 105, an adjustment circuit and a control module between DC power supply 100 ' and the working equipment 105; Every road adjustment circuit comprises input filter circuit 101, DC/AC inversion conditioned circuit 102, high-frequency isolation transformer T1, AC/DC rectification circuit 103 and the output filter circuit 104 of serial connection successively; Control module connects the output that two-way is adjusted circuit respectively through two current sensors, and control module connects DC/AC inversion conditioned circuit.
Wherein, input filter circuit 101 comprises three and be connected capacitor C 1, C2, the C3 at DC power supply 100 (100 ') two ends.
DC/AC inversion conditioned circuit 102 adopts the full bridge inverter that is made up of four switching tube S1, S2, S3, S4; Four switching tube S1, S2, S3, S4 are I GBT module; Be connected in series a fast recovery diode (D1, D2, D3, D4) between the collector electrode of each IGBT module (S1, S2, S3, S4) and the emitter, the collector electrode of IGBT module is connected with the positive pole of fast recovery diode.
High-frequency isolation transformer T1 is the booster type transformer.Iron based nano crystal (ultracrystallite) material has good comprehensive magnetic property; Integrate silicon steel, permalloy, ferritic advantage; Be high magnetic strength, high permeability, low-loss, reach excellent temperature stability, become the optimal selection of inverter transformer core rapidly.The saturated magnetic strength of iron-base nanometer crystal alloy is ferritic 3 times; The iron core of same volume is bigger 2 times than ferrite power output; Bigger anti-overload ability is arranged simultaneously, and its core loss is 1/2～1/5 of ferrite loss in the frequency range of 20KHz～50KHz, and permeability is ferritic more than 10 times; Therefore excitatory power is little, thereby has also reduced copper loss.The Curie temperature of iron-base nanometer crystal alloy is 570 ℃, is ferritic 3 times.In the present embodiment, the iron core of high-frequency isolation transformer T1 adopts the iron based nano crystal material, certainly, also can adopt other nanocrystalline (ultracrystallite) materials.
The two-port on the former limit of high-frequency isolation transformer T1 has been gone here and there a transformer leakage inductance L1 and a capacitance C4 respectively, can prevent the transformer DC magnetic bias saturated phenomenon that reasons such as, the switching tube triggering and conducting time asymmetric because of device property is inconsistent cause.
AC/DC rectification circuit 103 adopts the full-wave bridge rectifier circuit that is made up of four rectifier diode D5, D6, D7, D8; Because the secondary of high-frequency isolation transformer T1 is a high-frequency ac voltage; Each rectifier diode must adopt fast recovery diode; While, for eliminating the two ends peak voltage of each rectifier diode, one RC absorbed circuit (131,132,133,134) in the parallel connection of the two ends of each rectifier diode (D5, D6, D7, D8) owing to the influence of the secondary leakage inductance of high-frequency isolation transformer T1.
The initial ring flow phenomenon in order to prevent the two dc power supply parallel connection, the output of output filter circuit 105 is connected in series a diode D5.
As shown in Figure 2, the operation principle of the utility model:
Two-way DC power supply 100,100 ' is connected to the two-way adjustment circuit of the utility model respectively accordingly; The common working equipment 105 of giving provides working power after adjustment; Bear the power of working equipment 105 jointly, specifically be, the direct current signal of DC power supply is through the Filtering Processing of input filter circuit 101; Get into DC/AC inversion conditioned circuit 102; The switching tube S1 of DC/AC inversion conditioned circuit 102, S2, S3, S4 work with the break-make mode under the control of control module, and direct current signal is become the ac square wave signal with the break-make mode, and the ac square wave signal boosts through the no-load voltage ratio of high-frequency isolation transformer T1; Ac square wave signal after no-load voltage ratio is boosted provides working power after the filtering of output filter circuit 105, for working equipment 105 through AC/DC rectification circuit 103 output direct current signals; Therefore, the utility model uses high-frequency isolation transformer T1 to realize the isolation of the electricity of two-way DC power supply, and any one tunnel input and output all do not have electrical link; Output realization parallel connection is exported simultaneously; The common working equipment 105 of giving is supplied power, if wherein a direct current power supply breaks down and power supply can't be provided, then another DC power supply normally gives working equipment 105 power supplies alone; Working equipment 105 can power down, realizes for zero switching time.
Simultaneously, the output current that control module is monitored two-way adjustment circuit respectively through two current sensors is big or small, and is bigger than normal or less than normal like arbitrary output current; Control module is just controlled the duty ratio that corresponding D C/AC inversion conditioned circuit 102 changes the ac square wave signal; Change the size of output voltage of adjustment circuit, and then the size of adjustment output current, specifically: when output current bigger than normal; The output voltage of promptly adjusting circuit is higher, then reduces the duty ratio of ac square wave signal; Less than normal when output current, the output voltage of promptly adjusting circuit is on the low side, then improves the duty ratio of ac square wave signal; Such scheme effect is; Can control the two-way DC power supply flexibly in time through adjusted output voltage; Prevent because disturbed, instability etc. is former thereby cause the output voltage of arbitrary road adjustment circuit bigger than normal or less than normal; Guarantee the steady operation of working equipment, and can realize that multi-channel dc power supply exports through adjusted current-sharing.
The utility model is not limited to the foregoing description, for example, can be provided with three or more adjust circuit and corresponding current sensor as required; Based on simple replacement the foregoing description, that do not make creative work, should belong to the scope that the utility model discloses.
Claims (10)
1. many power supply change-over devices of direct current; It is characterized in that; Comprise that two-way is connected in parallel on the adjustment circuit that same working equipment also is connected with corresponding DC power supply respectively at least, every road adjustment circuit comprises DC/AC inversion conditioned circuit, high-frequency isolation transformer, the AC/DC rectification circuit of serial connection successively.
2. the many power supply change-over devices of direct current according to claim 1 is characterized in that, said DC/AC inversion conditioned circuit adopts the full bridge inverter that is made up of four switching tubes.
3. the many power supply change-over devices of direct current according to claim 2 is characterized in that said switching tube is the IGBT module.
4. the many power supply change-over devices of direct current according to claim 3 is characterized in that, are connected in series a fast recovery diode between the collector electrode of each said IGBT module and the emitter, and the collector electrode of said IGBT module is connected with the positive pole of said fast recovery diode.
5. the many power supply change-over devices of direct current according to claim 1 is characterized in that, said AC/DC rectification circuit adopts the full-wave bridge rectifier circuit that is made up of four rectifier diodes.
6. the many power supply change-over devices of direct current according to claim 5 is characterized in that, two ends parallel connection one RC of each said rectifier diode absorbs circuit.
7. the many power supply change-over devices of direct current according to claim 1; It is characterized in that, said adjustment circuit also comprise one be arranged on the input of said DC/AC inversion conditioned circuit input filter circuit and be located at the defeated place filter circuit of the output of said AC/DC rectification circuit.
8. the many power supply change-over devices of direct current according to claim 7; It is characterized in that, said output filter circuit comprise one be serially connected in the output of said AC/DC rectification circuit filter inductance and be attempted by the filter capacitor of the output of said AC/DC rectification circuit.
9. the many power supply change-over devices of direct current according to claim 1 is characterized in that the output of the said adjustment circuit in every road is serially connected with a diode.
10. according to any many power supply change-over devices of described direct current of claim 1 to 9; It is characterized in that; Also comprise a control module, said control module connects the output of said adjustment circuit through current sensor, and said control module connects said DC/AC inversion conditioned circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120233795U CN202135054U (en) | 2011-06-30 | 2011-06-30 | DC multi power supply conversion apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120233795U CN202135054U (en) | 2011-06-30 | 2011-06-30 | DC multi power supply conversion apparatus |
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| Publication Number | Publication Date |
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| CN202135054U true CN202135054U (en) | 2012-02-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201120233795U Expired - Fee Related CN202135054U (en) | 2011-06-30 | 2011-06-30 | DC multi power supply conversion apparatus |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102769393A (en) * | 2012-07-30 | 2012-11-07 | 中煤科工集团重庆研究院 | Method for realizing high loading capacity by integrating inputs of a plurality of intrinsically safe power supplies |
| CN103199606A (en) * | 2013-04-03 | 2013-07-10 | 华信邮电咨询设计研究院有限公司 | -48V direct current single system double-power-source device and power output control method |
| CN104218663A (en) * | 2014-09-18 | 2014-12-17 | 国家电网公司 | Uninterrupted power supply (UPS) direct current power supply port device for connecting direct current power supply with transformer substation direct current bus |
| CN104811036A (en) * | 2014-01-28 | 2015-07-29 | 台达电子企业管理（上海）有限公司 | Multi-source power supply system and control method thereof |
| CN106130058A (en) * | 2016-08-24 | 2016-11-16 | 深圳供电局有限公司 | A kind of bipolar multilamellar low-voltage direct distribution system for building construction |
| CN110492595A (en) * | 2019-08-01 | 2019-11-22 | 神华（福建）能源有限责任公司 | A kind of DC power supply automatic switching control equipment and system |
| CN114189034A (en) * | 2021-12-29 | 2022-03-15 | 常熟开关制造有限公司(原常熟开关厂） | Hybrid dual-power conversion device |
| WO2022088738A1 (en) * | 2020-10-26 | 2022-05-05 | 国网江苏省电力有限公司电力科学研究院 | Isolated low-voltage direct-current switching circuit and circuit switching apparatus, and control method |
-
2011
- 2011-06-30 CN CN201120233795U patent/CN202135054U/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102769393A (en) * | 2012-07-30 | 2012-11-07 | 中煤科工集团重庆研究院 | Method for realizing high loading capacity by integrating inputs of a plurality of intrinsically safe power supplies |
| CN102769393B (en) * | 2012-07-30 | 2016-03-23 | 中煤科工集团重庆研究院有限公司 | The input of integrated multipath intrinsic safety electric source realizes the method for high load capacity |
| CN103199606A (en) * | 2013-04-03 | 2013-07-10 | 华信邮电咨询设计研究院有限公司 | -48V direct current single system double-power-source device and power output control method |
| CN104811036A (en) * | 2014-01-28 | 2015-07-29 | 台达电子企业管理（上海）有限公司 | Multi-source power supply system and control method thereof |
| US9800056B2 (en) | 2014-01-28 | 2017-10-24 | Delta Electronics (Shanghai) Co., Ltd. | Multi-power supply system and control method thereof |
| CN104811036B (en) * | 2014-01-28 | 2018-01-26 | 台达电子企业管理（上海）有限公司 | Multi-power supply system and its control method |
| CN104218663A (en) * | 2014-09-18 | 2014-12-17 | 国家电网公司 | Uninterrupted power supply (UPS) direct current power supply port device for connecting direct current power supply with transformer substation direct current bus |
| CN106130058A (en) * | 2016-08-24 | 2016-11-16 | 深圳供电局有限公司 | A kind of bipolar multilamellar low-voltage direct distribution system for building construction |
| CN106130058B (en) * | 2016-08-24 | 2019-06-28 | 深圳供电局有限公司 | A kind of bipolar multilayer low-voltage direct distribution system for building construction |
| CN110492595A (en) * | 2019-08-01 | 2019-11-22 | 神华（福建）能源有限责任公司 | A kind of DC power supply automatic switching control equipment and system |
| WO2022088738A1 (en) * | 2020-10-26 | 2022-05-05 | 国网江苏省电力有限公司电力科学研究院 | Isolated low-voltage direct-current switching circuit and circuit switching apparatus, and control method |
| CN114189034A (en) * | 2021-12-29 | 2022-03-15 | 常熟开关制造有限公司(原常熟开关厂） | Hybrid dual-power conversion device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120201 Termination date: 20190630 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |