CN201282427Y - AC output parallel connection power supply device - Google Patents
AC output parallel connection power supply device Download PDFInfo
- Publication number
- CN201282427Y CN201282427Y CNU2008202124475U CN200820212447U CN201282427Y CN 201282427 Y CN201282427 Y CN 201282427Y CN U2008202124475 U CNU2008202124475 U CN U2008202124475U CN 200820212447 U CN200820212447 U CN 200820212447U CN 201282427 Y CN201282427 Y CN 201282427Y
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- output
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- converting unit
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Abstract
The utility model provides an AC output paralleled power supply device which comprises at least two power supply modules which are connected in parallel to each other, and further comprises a guiding module, wherein, the power supply modules comprise an AC/DC conversion unit and a DC/DC conversion unit; the input terminal of the DC/DC conversion unit is connected with the output terminal of the AC/DC conversion unit; the AC/DC conversion unit converts an input AC voltage into a DC voltage, and then outputs the DC voltage to the DC/DC conversion unit; the DC/DC conversion unit converts an input DC voltage into a reference waveform DC voltage according to a reference signal, and then outputs the DC voltage to the guiding module; and the guiding module converts the paralleled output DC voltage of the power supply modules into an AC voltage, and then outputs the AC voltage to a load. The utility model which realizes AC output and connects the power supply modules in parallel by direct current has the advantages that the circulating current is avoided; the technology is mature; the implementation cost is lower; the maintainability and the dilatancy are high; and the reliability is higher.
Description
Technical field
The utility model relates to the Technics of Power Electronic Conversion technical field, relates in particular to the out-put supply field that exchanges.
Background technology
Exchange out-put supply and obtained extensive use in a lot of fields, uninterrupted AC power UPS, inverter, naval vessel are the power-supply systems that is output as form of communication with demagnetization power supply etc., and a lot of use occasions are very big to the demanded power output of power supply, usually reach tens KW, even hundreds of KW.For high-power ac power, present implementation mainly contains two kinds: a kind of is the power output capacity that directly improves the monomer power supply, for this kind solution, not only increase the development and Design difficulty greatly, also very uneconomical, the most important thing is that the reliability of this power supply is not high, in case break down in power supply inside, to cause whole power supply normally not move, the maintainability of this external system is also relatively poor.Another kind of scheme is to utilize many less AC power supply module parallel runnings of power output to improve the power output capacity of electric power system, and this scheme is compared with such scheme 1, has improved the reliability and maintainability of power supply greatly.Shown in Figure 1 is the system principle realization block diagram of this interchange output-parallel supply unit, power-supply system can be formed in parallel by the identical or different power module 1..N of a plurality of power grades, to realize system's increase-volume, each power module is made of AC/DC and two Power Conversion unit of DC/AC, power module is for exchanging output, and still also there is following defective in the implementation of this AC power supply system in actual applications:
1, the output of AC power supply module is directly parallel in together, because power module is output as form of communication, each module output voltage amplitude and phase place just have very strict requirement, be that each module output voltage amplitude of AC power in parallel, direction and phase place require constantly to be consistent, otherwise circulation will occur between the monomer power module.Even before system dispatches from the factory the output voltage and the phase place of each AC power supply module are precisely set, guarantee that each module is all consistent, but increase along with operation hours, each loose pattern block power supply amplitude of output voltage, direction and phase place can change equally and cause intermodule to produce circulation, circulation directly causes each monomer power supply load sharing unbalanced, shares the very fast easily damage of heavier power module.
2, exchange direct parallel technology and realize that difficulty is big, the control circuit complexity.
The utility model content
Defective at above-mentioned interchange output-parallel power technology scheme, technical problem to be solved in the utility model is for proposing a kind of interchange output-parallel supply unit, avoid the circulation problem between each parallel electric source module, realize more powerful interchange output, improve system maintainability and reliability.
The technical solution of the utility model comprises at least two power modules that connect with parallel way, also comprises an oriented module; Described power module comprises AC/DC converting unit and DC/DC converting unit, and the input of described DC/DC converting unit links to each other with the output of described AC/DC converting unit; Described AC/DC converting unit is converted to direct voltage with input ac voltage and exports to described DC/DC converting unit, and described DC/DC converting unit is exported to oriented module after input direct voltage being converted to the direct voltage of reference waveform according to reference signal; Described oriented module is exported to load after the output dc voltage in parallel of power module is converted to alternating voltage.
In the technique scheme, described AC/DC converting unit comprises rectification circuit and filter circuit, or comprises rectification circuit and the circuit of power factor correction that is used to suppress harmonic current.
In the technique scheme, described DC/DC converting unit comprises control circuit, inverter circuit, current rectifying and wave filtering circuit; The input of described inverter circuit links to each other with the output of described AC/DC converting unit, and the output of described inverter circuit links to each other with the input of described current rectifying and wave filtering circuit, and the output of described current rectifying and wave filtering circuit links to each other with the input of described oriented module; Described inverter circuit carries out copped wave to input voltage under described control circuit control, the corresponding to direct voltage of the reference signal of output waveform and described control circuit, described current rectifying and wave filtering circuit carries out exporting to oriented module behind the rectifying and wave-filtering to the output voltage of inverter circuit.
In the technique scheme, described oriented module can adopt bridge circuit to realize, by the break-make of controlling four switching devices input direct voltage is converted to alternating voltage.The switching device of described bridge circuit can be in relay, IGBT, MOSFET, the controllable silicon a kind of.
Adopt the utility model to realize exchanging output, by each power module of DC parallel, avoided the generation of circulation phenomenon, technology maturation realizes that cost is lower, has very high maintainability, dilatancy, and has higher reliability.
Description of drawings
Fig. 1 is the schematic diagram of the AC power shunting means of prior art;
Fig. 2 is the theory diagram of the utility model embodiment;
Fig. 3 is the schematic diagram of power module AC/DC unit among embodiment of the utility model;
Fig. 4 is the schematic diagram of power module AC/DC unit among another embodiment of the utility model;
Fig. 5 is the schematic diagram of power module DC/DC unit among the utility model embodiment;
Fig. 6 is the bridge circuit schematic diagram of oriented module among the utility model embodiment;
Fig. 7 is the sinusoidal wave direct current output example figure that power module DC/DC unit produces according to reference signal among the utility model embodiment.
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is elaborated.
Be illustrated in figure 2 as the systematic schematic diagram that the utility model exchanges the output-parallel supply unit, comprise the identical or different power module of a plurality of power grades that are connected in parallel 1 to power module N, also comprise an oriented module; Described power module comprises AC/DC converting unit A and DC/DC converting unit B, and the input of described DC/DC converting unit B links to each other with the output of described AC/DC converting unit A; Described AC/DC converting unit A is converted to direct voltage with input ac voltage and exports to described DC/DC converting unit B, and described DC/DC converting unit B exports to oriented module after input direct voltage being converted to the direct voltage of reference waveform according to reference signal; Described oriented module is exported to load after the input direct voltage of reference waveform is converted to alternating voltage.
The AC/DC converting unit A of power module can be with two kinds of execution modes, and a kind of rectification circuit and filter circuit of comprising as shown in Figure 3, directly carries out AC-input voltage can realizing after rectification, the filtering function of AC/DC.Another kind of execution mode comprises and is used to suppress the circuit of power factor correction of harmonic current, as shown in Figure 4, exchanges input through the rectification circuit rectification, suppresses to export to DC/DC converting unit B behind the harmonic wave through circuit of power factor correction again.
As shown in Figure 5, the DC/DC converting unit of power module comprises control circuit c, inverter circuit a, current rectifying and wave filtering circuit b; The input of inverter circuit a links to each other with the input of DC/DC converting unit, and output links to each other with the input of described current rectifying and wave filtering circuit b, and the output of current rectifying and wave filtering circuit b links to each other with the output of DC/DC converting unit; Inverter circuit a carries out copped wave according to reference signal to input voltage under control circuit c control, as shown in Figure 7, the frequency of reference signal is 2 times of output simple alternating current frequency, voltage waveform and reference signal shown in Figure 7 were consistent after copped wave was handled, described current rectifying and wave filtering circuit carries out output dc voltage behind the rectifying and wave-filtering to the output voltage of inverter circuit, and the direct current half-sinusoid that the DC/DC converting unit of N the power module that this moment is in parallel is exported as shown in Figure 7 under the same reference signal controlling outputs to oriented module.
Oriented module comprises a bridge circuit, as shown in Figure 6, four switching device break-makes of bridge circuit control produce alternating voltage, the direct current input as shown in Figure 7, t0 is just to import to t1 constantly, two switching devices of the K1 of oriented module and K4 are in conducting state simultaneously, K2 and K3 are in off state simultaneously, at this moment device just is output as, because t1 is zero point, t1 then is a negative sense to t2 input constantly, and two switching devices of the K2 of oriented module and K3 are in conducting state simultaneously, K1 and K4 are in off state simultaneously, at this moment device is output as negative sense, so successively constantly at the input waveform pass zero point, and K2 and K3, K1 and K4 take turns conducting and turn-off, and then can realize sine wave AC output.Switching device herein can be chosen switching devices such as relay, IGBT, MOSFET, controllable silicon and realize according to the concrete condition of speed, voltage, electric current.
Claims (6)
1, a kind of interchange output-parallel supply unit comprises at least two power modules that connect with parallel way, it is characterized in that, also comprises an oriented module; Described power module comprises AC/DC converting unit and DC/DC converting unit, and the input of described DC/DC converting unit links to each other with the output of described AC/DC converting unit; Described AC/DC converting unit is converted to direct voltage with input ac voltage and exports to described DC/DC converting unit, and described DC/DC converting unit is exported to oriented module after input direct voltage being converted to the direct voltage of reference waveform according to reference signal; Described oriented module is exported to load after the output dc voltage in parallel of power module is converted to alternating voltage.
2, interchange output-parallel supply unit according to claim 1 is characterized in that, described AC/DC converting unit comprises rectification circuit and filter circuit, perhaps comprises rectification phone and the circuit of power factor correction that is used to suppress harmonic current.
3, interchange output-parallel supply unit according to claim 1 is characterized in that, described DC/DC converting unit comprises control circuit, inverter circuit, current rectifying and wave filtering circuit; The input of described inverter circuit links to each other with the output of described AC/DC converting unit, and the output of described inverter circuit links to each other with the input of described current rectifying and wave filtering circuit, and the output of described current rectifying and wave filtering circuit links to each other with the input of described oriented module; Described inverter circuit carries out copped wave to input voltage under described control circuit control, the corresponding to direct voltage of the reference signal of output waveform and described control circuit, described current rectifying and wave filtering circuit carries out exporting to oriented module behind the rectifying and wave-filtering to the output voltage of inverter circuit.
According to claim 1,2 or 3 described interchange output-parallel supply units, it is characterized in that 4, described oriented module adopts bridge circuit to realize, by the break-make of controlling four switching devices input direct voltage is converted to alternating voltage.
5, interchange output-parallel supply unit according to claim 4 is characterized in that, described oriented module adopts bridge circuit to realize, by the break-make of controlling four switching devices input direct voltage is converted to alternating voltage.
6, interchange output-parallel supply unit according to claim 5 is characterized in that, what the switching device of described bridge circuit can be in relay, IGBT, MOSFET, the controllable silicon is a kind of.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202124475U CN201282427Y (en) | 2008-10-14 | 2008-10-14 | AC output parallel connection power supply device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202124475U CN201282427Y (en) | 2008-10-14 | 2008-10-14 | AC output parallel connection power supply device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201282427Y true CN201282427Y (en) | 2009-07-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNU2008202124475U Expired - Fee Related CN201282427Y (en) | 2008-10-14 | 2008-10-14 | AC output parallel connection power supply device |
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| CN (1) | CN201282427Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101853038A (en) * | 2010-06-12 | 2010-10-06 | 中兴通讯股份有限公司 | Quick-response constant current source parallel system and implementation method thereof |
| CN106787826A (en) * | 2017-04-01 | 2017-05-31 | 广东商鼎智能设备有限公司 | Power panel and power panel system |
-
2008
- 2008-10-14 CN CNU2008202124475U patent/CN201282427Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101853038A (en) * | 2010-06-12 | 2010-10-06 | 中兴通讯股份有限公司 | Quick-response constant current source parallel system and implementation method thereof |
| CN101853038B (en) * | 2010-06-12 | 2013-12-11 | 中兴通讯股份有限公司 | Quick-response constant current source parallel system and implementation method thereof |
| CN106787826A (en) * | 2017-04-01 | 2017-05-31 | 广东商鼎智能设备有限公司 | Power panel and power panel system |
| CN106787826B (en) * | 2017-04-01 | 2023-10-31 | 广东商鼎智能设备有限公司 | Power panel and power panel system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090729 Termination date: 20131014 |