CN203445782U - Maximum power tracker - Google Patents
Maximum power tracker Download PDFInfo
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- CN203445782U CN203445782U CN201320568455.4U CN201320568455U CN203445782U CN 203445782 U CN203445782 U CN 203445782U CN 201320568455 U CN201320568455 U CN 201320568455U CN 203445782 U CN203445782 U CN 203445782U
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Abstract
The utility model discloses a maximum power tracker which comprises an input-end positive pole connector, an input-end negative pole connector, an output-end positive pole connector and an output-end negative pole connector and further comprises an isolated DC-DC converter provided with an input-end positive pole, an input-end negative pole, an output-end positive pole and an output-end negative pole, wherein the input-end positive pole of the isolated DC-DC converter is electrically connected with the input-end positive pole connector, the input-end negative pole of the isolated DC-DC converter is electrically connected with the input-end negative pole connector, the output-end positive pole of the isolated DC-DC converter is electrically connected with the output-end positive pole connector, the output-end negative pole and the input-end positive pole of the isolated DC-DC converter are electrically connected, and the output-end negative pole connector is electrically connected with the input-end negative pole connector. As the output-end negative pole and the input-end positive pole of the isolated DC-DC converter are electrically connected, a part of voltage is superimposed outside the isolated DC-DC converter, and the efficiency of a whole system is maximized; and meanwhile, the requirements on the power of the converter and the withstand voltage of electronic components are lowered so that the cost is lowered and the service life is prolonged.
Description
Technical field:
The present invention relates to a kind of power electronic device of grid-connected power generation system, particularly a kind of maximal power tracing device.
Background technology:
Development along with wind power generation and solar energy generation technology, for grid-connected needs or in order to meet high-voltage load power supply, usually need these low tensions to become high-tension electricity, due to wind power generation and solar power generation unstable, all the time Maximum Power Output, therefore maximal power tracing device comes into vogue, and maximal power tracing device is to utilize power electronic device to coordinate suitable software, makes these wind-driven generators or solar module Maximum Power Output all the time.Traditional booster type maximal power tracing device is realized by BOOST DC converter, as shown in Figure 1, in actual applications, DC converter is the input anode a of DC-DC converter, negative pole b is directly directly connected with the both positive and negative polarity of the output of wind-driven generator or solar module, output head anode c, negative pole d is also directly connected with the input both positive and negative polarity of combining inverter or high-voltage load, this topological structure easily causes very high crest voltage and power loss, particularly in the voltage difference of input and output a lot, like this electronic devices and components requirement of withstand voltage in maximal power tracing device is improved, the cost of maximal power tracing device will significantly improve like this, life-span is also affected naturally, and because power consumption is larger, the efficiency of maximal power tracing device is also lower.
Summary of the invention:
Technical problem to be solved by this invention is to provide a kind of novel maximal power tracing device, it comprises input anode joint A, input cathode joint B, output head anode joint C, negative pole of output end joint D, also comprise that tape input rectifies utmost point a, input cathode b and output head anode c, the isolation DC-DC converter of negative pole of output end d, the input anode a that wherein isolates DC-DC converter is electrically connected to input anode joint A, the input cathode b of isolation DC-DC converter is electrically connected to input cathode joint B, the output head anode c of isolation DC-DC converter is electrically connected to output head anode joint C, the negative pole of output end d of wherein said isolation DC-DC converter is electrically connected to input anode a, described negative pole of output end joint D is electrically connected to input cathode joint B.
The present invention further technical characterictic is:
Described isolation DC-DC converter comprises isolating transformer, and with the first full-bridge circuit and the second full-bridge circuit that isolating transformer is electrically connected, the turn ratio of wherein said isolating transformer primary coil and secondary coil is 1 than n, and wherein n is greater than 1.
Described the second full-bridge circuit can be also half-bridge circuit or push-pull circuit.
Described the first full-bridge circuit can be also half-bridge circuit or push-pull circuit.
The invention has the beneficial effects as follows: relatively traditional booster type maximal power tracing device, maximal power tracing device of the present invention is because isolation DC-DC converter output terminal negative pole is electrically connected to input anode, negative pole of output end joint D is electrically connected to input cathode joint B and input cathode b, so a part of voltage is to be superimposed upon isolation DC-DC converter outside, do not need maximal power tracing device internal electronic device to carry this voltage, therefore the electronic devices and components requirement of withstand voltage in maximal power tracing device is significantly reduced, the cost of maximal power tracing device will significantly reduce like this, and the life-span also can extend naturally, and such connected mode can get around isolation DC-DC converter and directly sends some energy to combining inverter or high-voltage load, the power consumption of isolating DC-DC converter is also significantly reduced, the available horsepower of higher percent is delivered to inverter or load, the efficiency of maximal power tracing device is also improved largely thereupon like this, can make the maximizing efficiency of whole system.
Accompanying drawing explanation:
Fig. 1 is the topological structure schematic diagram of traditional maximal power tracing device;
Fig. 2 is the topological structure schematic diagram of maximal power tracing device of the present invention;
Fig. 3 is the topological structure schematic diagram of isolating DC-DC converter in one embodiment of the invention.
Embodiment:
Below in conjunction with accompanying drawing, the present invention is described further:
As shown in Figure 2, a kind of maximal power tracing device of the present invention, it comprises input anode joint A, input cathode joint B, output head anode joint C, negative pole of output end joint D, also comprise that tape input rectifies utmost point a, input cathode b and output head anode c, the isolation DC-DC converter of negative pole of output end d, the input anode a that wherein isolates DC-DC converter is electrically connected to input anode joint A, the input cathode b of isolation DC-DC converter is electrically connected to input cathode joint B, the output head anode c of isolation DC-DC converter is electrically connected to output head anode joint C, the negative pole of output end d of wherein said isolation DC-DC converter is electrically connected to input anode a, described negative pole of output end joint D is electrically connected to input cathode joint B.
In actual applications, the input anode joint A of maximal power tracing device of the present invention, the output of input cathode joint B and wind-driven generator or solar module just, negative pole directly connects, output head anode joint C, negative pole of output end joint D also input direct and combining inverter or high-voltage load rectifies, negative pole connects, relatively traditional booster type maximal power tracing device, maximal power tracing device of the present invention is because isolation DC-DC converter output terminal negative pole is electrically connected to input anode, negative pole of output end joint D is electrically connected to input cathode joint B and input cathode b, so a part of voltage is to be superimposed upon isolation DC-DC converter outside, do not need maximal power tracing device internal electronic component to carry this voltage, therefore the electronic devices and components requirement of withstand voltage in maximal power tracing device is significantly reduced, the cost of maximal power tracing device will significantly reduce like this, and the life-span also can extend naturally, and such connected mode can get around isolation DC-DC converter and directly sends some energy to combining inverter or high-voltage load, the power consumption of isolating DC-DC converter is also significantly reduced, the available horsepower of higher percent is delivered to inverter or load, the efficiency of maximal power tracing device is also improved largely thereupon like this, can make the maximizing efficiency of whole system.
Fig. 3 is the topological structure schematic diagram of isolating DC-DC converter in one embodiment of the invention, in the present embodiment, described isolation DC-DC converter comprises isolating transformer 1, the first full-bridge circuit 2 and the second full-bridge circuit 3 that are electrically connected with isolating transformer 1, wherein the primary coil of the first full-bridge circuit 2 and transformer is electrically connected to and forms closed-loop path, the secondary coil 102 of the second full-bridge circuit 3 and transformer is electrically connected to and forms closed-loop path, the turn ratio of described isolating transformer primary coil and secondary coil is 1:2 in the present embodiment, certainly when practical application, can as required the turn ratio of isolating transformer primary coil and secondary coil be set as to 1:3, 1:4, 1:5, 1:20, 1:30, 1:50, 1:70 or 1:90.
Fig. 3 is only the topological structure schematic diagram of isolating DC-DC converter in one embodiment of the invention, isolation DC-DC converter topology structure in maximal power tracing device of the present invention can also have a variety of, for example, on basis embodiment illustrated in fig. 3, when the first full-bridge circuit is when constant, described the second full-bridge circuit can be transformed to half-bridge circuit or push-pull circuit; When the second full-bridge circuit is when constant, described the first full-bridge circuit can be transformed to half-bridge circuit or push-pull circuit; And first full-bridge circuit while being transformed to half-bridge circuit or push-pull circuit, the second full-bridge circuit also can be transformed to half-bridge circuit or push-pull circuit.
Although the present invention has described several embodiments herein, coverage of the present invention is not limited to this.On the contrary, all technical schemes of falling in fact within the scope of the claims under all instructions on literal or in equivalents are contained in the present invention, as used soft switch technique ZVS and ZCS in circuit.Protection scope of the present invention is as the criterion with claims.
Claims (4)
1. a maximal power tracing device, it comprises input anode joint A, input cathode joint B, output head anode joint C, negative pole of output end joint D, also comprise that tape input rectifies utmost point a, input cathode b and output head anode c, the isolation DC-DC converter of negative pole of output end d, the input anode a that wherein isolates DC-DC converter is electrically connected to input anode joint A, the input cathode b of isolation DC-DC converter is electrically connected to input cathode joint B, the output head anode c of isolation DC-DC converter is electrically connected to output head anode joint C, it is characterized in that: the negative pole of output end d of described isolation DC-DC converter is electrically connected to input anode a, described negative pole of output end joint D is electrically connected to input cathode joint B.
2. maximal power tracing device as claimed in claim 1, it is characterized in that: described isolation DC-DC converter also comprises isolating transformer, the first full-bridge circuit being electrically connected to isolating transformer primary coil, and the second full-bridge circuit being electrically connected to isolating transformer secondary coil, the turn ratio of wherein said isolating transformer primary coil and secondary coil is 1 than n, and wherein n is greater than 1.
3. maximal power tracing device as claimed in claim 2, is characterized in that: described the second full-bridge circuit is half-bridge circuit or push-pull circuit.
4. the maximal power tracing device as described in right claim 2 or 3, is characterized in that: described the first full-bridge circuit is half-bridge circuit or push-pull circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320568455.4U CN203445782U (en) | 2013-09-13 | 2013-09-13 | Maximum power tracker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320568455.4U CN203445782U (en) | 2013-09-13 | 2013-09-13 | Maximum power tracker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203445782U true CN203445782U (en) | 2014-02-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320568455.4U Expired - Lifetime CN203445782U (en) | 2013-09-13 | 2013-09-13 | Maximum power tracker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203445782U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103490614A (en) * | 2013-09-13 | 2014-01-01 | 嘉兴凯希电子有限公司 | Maximum-power tracker |
-
2013
- 2013-09-13 CN CN201320568455.4U patent/CN203445782U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103490614A (en) * | 2013-09-13 | 2014-01-01 | 嘉兴凯希电子有限公司 | Maximum-power tracker |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140219 |