CN206148964U - Permanent -magnet direct -drive fan grid -connected inverter device - Google Patents
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- CN206148964U CN206148964U CN201621215536.6U CN201621215536U CN206148964U CN 206148964 U CN206148964 U CN 206148964U CN 201621215536 U CN201621215536 U CN 201621215536U CN 206148964 U CN206148964 U CN 206148964U
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Abstract
The utility model provides a permanent -magnet direct -drive fan grid -connected inverter device, include: MPU controller, rectifier, LC wave filter, flyback converter, contravariant bridge, LCL wave filter, a drive module, the 2nd drive module, a voltage sensor, the 2nd voltage sensor, the 3rd voltage sensor, fourth voltage sensor and current sensor, wherein, the voltage of third electric capacity in second electric capacity among first electric capacity in the LC wave filter, the flyback converter, the LCL wave filter is gathered through a voltage sensor respectively to the 3rd voltage sensor to the MPU controller, gathers the voltage of single phase power net through fourth voltage sensor, gathers the electric current that is incorporated into the power networks of dc -to -ac converter through current sensor to control flyback converter and contravariant bridge respectively through a drive module and the 2nd drive module. Utilize the utility model provides a low -harmonic -wave's content can effectively fall in permanent -magnet direct -drive fan grid -connected inverter device, improves the quality of electric energy.
Description
Technical Field
The utility model relates to a wind-powered electricity generation technical field, more specifically relates to a permanent magnetism directly drives fan grid-connected inverter device.
Background
Wind power generation has become one of the main directions of current new energy power generation due to the advantages of large reserves, cleanness, renewability and the like. The small wind power generation has the characteristics of low cost and flexible installation, and is widely applied to rural areas in northwest of China with better wind power resources and areas where large power grids are difficult to provide power, such as islands, frontier defense and the like. For a small wind power generation system in grid-connected operation, a simple structure of a permanent magnetic direct-drive fan and a conventional inverter device is mostly adopted, and the small wind power generation system has the defects of high harmonic content and poor electric energy quality.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a permanent magnetism directly drives fan inverter device that is incorporated into power networks to the drawback of prior art to effectively improve small-size wind power generation system's the electric current quality of being incorporated into power networks.
The utility model provides a permanent magnetism directly drives fan inverter device that is incorporated into power networks, include: the device comprises an MPU controller, a rectifier, an LC filter, a flyback converter, an inverter bridge, an LCL filter, a first driving module, a second driving module, a first voltage sensor, a second voltage sensor, a third voltage sensor, a fourth voltage sensor and a current sensor; the three-phase input end of the rectifier is connected with the three-phase output end of the permanent-magnet direct-drive fan, the single-phase output positive end of the rectifier is connected with the input positive end of the LC filter, and the single-phase output negative end of the rectifier is connected with the input negative end of the LC filter; the output positive end of the LC filter is connected with the input positive end of the flyback converter, and the output negative end of the LC filter is connected with the input negative end of the flyback converter; the output positive end of the flyback converter is connected with the input positive end of the inverter bridge, and the output negative end of the flyback converter is connected with the input negative end of the inverter bridge; the output positive end of the inverter bridge is connected with the input positive end of the LCL filter, and the output negative end of the inverter bridge is connected with the input negative end of the LCL filter; the output positive end of the LCL filter is connected with the measurement positive end of the fourth voltage sensor, and the output negative end of the LCL filter is connected with the measurement negative end of the fourth voltage sensor; the measurement positive end of the first voltage sensor is connected with the positive electrode of a first capacitor in the LC filter, the measurement negative end of the first voltage sensor is connected with the negative electrode of the first capacitor in the LC filter, and the measurement signal output end of the first voltage sensor is connected with the MPU controller; the measurement positive end of a second voltage sensor is connected with the positive electrode of a second capacitor in the flyback converter, the measurement negative end of the second voltage sensor is connected with the negative electrode of the second capacitor in the flyback converter, and the measurement signal output end of the second voltage sensor is connected with the MPU controller; the measuring positive end of a third voltage sensor is connected with the positive electrode of a third capacitor in the LCL filter, the measuring negative end of the third voltage sensor is connected with the negative electrode of the third capacitor in the LCL filter, and the measuring signal output end of the third voltage sensor is connected with the MPU controller; the measurement positive end of the fourth voltage sensor is connected with the output positive end of the LCL filter, the measurement negative end of the fourth voltage sensor is connected with the output negative end of the LCL filter, and the measurement signal output end of the fourth voltage sensor is connected with the MPU controller; the measurement positive end of the current sensor is connected with the measurement positive end of the fourth voltage sensor, the measurement negative end of the current sensor is connected with the live wire terminal of the single-phase power grid, and the measurement signal output end of the current sensor is connected with the MPU controller; the input end of the first driving module is connected with the MPU controller, and the output end of the first driving module is connected with the grid electrode of a first power tube in the flyback converter; the input end of the second driving module is connected with the MPU controller, the first output end of the second driving module is connected with the grid electrode of the second power tube and the grid electrode of the fifth power tube in the inverter bridge, and the second output end of the second driving module is connected with the grid electrode of the third power tube and the grid electrode of the fourth power tube in the inverter bridge.
Further, it is preferable that the LC filter includes a first inductance and a first capacitance; one end of the first inductor is connected with the positive end of the single-phase output of the rectifier, the other end of the first inductor is connected with the positive electrode of the first capacitor, and the negative electrode of the first capacitor is connected with the negative end of the single-phase output of the rectifier.
In addition, the flyback converter preferably includes a flyback transformer, a first power tube, a first diode, and a second capacitor; one input end of the flyback transformer is connected with the positive output end of the LC filter, and the other input end of the flyback transformer is connected with the drain electrode of the first power tube; one output end of the flyback transformer is connected with the anode of the first diode, and the other output end of the flyback transformer is connected with the cathode of the second capacitor; the cathode of the first diode is connected with the anode of the second capacitor; the positive electrode of the second capacitor is connected with the positive input end of the inverter bridge, and the negative electrode of the second capacitor is connected with the negative input end of the inverter bridge; the grid electrode of the first power tube is connected with the output end of the first driving module, the source electrode of the first power tube is connected with the output negative end of the LC filter, and the drain electrode of the first power tube is connected with the other input end of the flyback transformer.
In addition, the inverter bridge preferably includes a second power transistor, a third power transistor, a fourth power transistor, and a fifth power transistor; the grid electrode of the second power tube and the grid electrode of the fifth power tube are respectively connected with the first output end of the second driving module, the grid electrode of the third power tube and the grid electrode of the fourth power tube are respectively connected with the second output end of the second driving module, the source electrode of the second power tube is connected with the drain electrode of the fourth power tube, the drain electrode of the second power tube is connected with the positive output end of the flyback converter, the drain electrode of the third power tube is connected with the drain electrode of the second power tube, the source electrode of the third power tube is connected with the drain electrode of the fifth power tube, the source electrode of the fourth power tube is connected with the negative output end of the flyback converter, and the source electrode of the fifth power tube is connected with the source electrode of the fourth power tube.
Further, it is preferable that the LCL filter includes a second inductor, a third capacitor, and a third inductor; one end of the second inductor is connected with the positive output end of the inverter bridge, and the other end of the second inductor is connected with the positive electrode of the third capacitor; the negative electrode of the third capacitor is connected with the negative output end of the inverter bridge; one end of the third inductor is connected with the anode of the third capacitor, and the other end of the third inductor is connected with the measurement positive end of the current sensor.
Compared with the prior art, the utility model provides a permanent magnetism directly drives fan grid-connected inverter device's beneficial effect does: the MPU controller respectively collects the voltages of the first capacitor to the third capacitor through the first voltage sensor to the third voltage sensor, collects the voltage of a single-phase power grid through the fourth voltage sensor, collects the grid-connected current of the inverter through the current sensor, and respectively controls the flyback converter and the inverter bridge through the two driving modules, so that the harmonic content is effectively reduced, and the electric energy quality is improved.
Drawings
Other objects and results of the present invention will become more apparent and more readily appreciated as the same becomes better understood by reference to the following description and appended claims, taken in conjunction with the accompanying drawings. In the drawings:
fig. 1 is according to the utility model discloses permanent magnetism directly drives fan grid-connected inverter device's structure chart.
Wherein the reference numerals include: the system comprises an MPU controller 1, a rectifier 2, an LC filter 3, a flyback converter 4, an inverter bridge 5, an LCL filter 6, a first drive module 7, a second drive module 8, a permanent-magnet direct-drive fan GS, a first voltage sensor UT1, a second voltage sensor UT2, a third voltage sensor UT3, a fourth voltage sensor UT4, a current sensor CT, a diode D, first to fifth power tubes Q1 to Q5, first to third capacitors C1 to C3, first to third inductors L1 to L3 and a flyback transformer TX 1.
Detailed Description
In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of one or more embodiments. It may be evident, however, that such embodiment(s) may be practiced without these specific details. In other instances, well-known structures and devices are shown in block diagram form in order to facilitate describing one or more embodiments. Specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
Fig. 1 shows the structure of the permanent magnet direct-drive fan grid-connected inverter device according to the embodiment of the utility model.
As shown in fig. 1, the embodiment of the utility model provides a permanent magnetism directly drives fan grid-connected inverter device, include: the system comprises an MPU controller 1, a rectifier 2, an LC filter 3, a flyback converter 4, an inverter bridge 5, an LCL filter 6, a first driving module 7, a second driving module 8, a first voltage sensor UT1, a second voltage sensor UT2, a third voltage sensor UT3, a fourth voltage sensor UT4 and a current sensor CT; wherein,
the three-phase input end of the rectifier 2 is connected with the three-phase output end of the permanent-magnet direct-drive fan GS, the single-phase output positive end of the rectifier 2 is connected with the input positive end of the LC filter 3, and the single-phase output negative end of the rectifier 2 is connected with the input negative end of the LC filter 3. The output positive end of the LC filter 3 is connected to the input positive end of the flyback converter 4, and the output negative end of the LC filter 3 is connected to the input negative end of the flyback converter 4.
The positive output terminal of the flyback converter 4 is connected with the positive input terminal of the inverter bridge 5, and the negative output terminal of the flyback converter 4 is connected with the negative input terminal of the inverter bridge 5.
The positive output end of the inverter bridge 5 is connected with the positive input end of the LCL filter 6, and the negative output end of the inverter bridge 5 is connected with the negative input end of the LCL filter 6.
The positive output terminal of the LCL filter 6 is connected to the positive measurement terminal of the fourth voltage sensor UT4, and the negative output terminal of the LCL filter 6 is connected to the negative measurement terminal of the fourth voltage sensor UT 4.
The positive measuring terminal of the first voltage sensor UT1 is connected with the positive electrode of the first capacitor C1 in the LC filter 3, the negative measuring terminal of the first voltage sensor UT1 is connected with the negative electrode of the first capacitor C1 in the LC filter 3, and the signal measuring output terminal of the first voltage sensor UT1 is connected with the MPU controller 1.
The positive measurement terminal of the second voltage sensor UT2 is connected to the positive electrode of the second capacitor C2 in the flyback converter 4, the negative measurement terminal of the second voltage sensor UT2 is connected to the negative electrode of the second capacitor C2 in the flyback converter 4, and the output measurement signal terminal of the second voltage sensor UT2 is connected to the MPU controller 1.
The positive measuring terminal of the third voltage sensor UT3 is connected with the positive electrode of a third capacitor C3 in the LCL filter 6, the negative measuring terminal of the third voltage sensor UT3 is connected with the negative electrode of a third capacitor C3 in the LCL filter 6, and the signal measuring output terminal of the third voltage sensor UT3 is connected with the MPU controller 1.
The positive measuring terminal of the fourth voltage sensor UT4 is connected to the positive output terminal of the LCL filter 6, the negative measuring terminal of the fourth voltage sensor UT4 is connected to the negative output terminal of the LCL filter 6, and the signal output terminal of the fourth voltage sensor UT4 is connected to the MPU controller 1.
The positive measuring end of the current sensor CT is connected with the positive measuring end of the fourth voltage sensor UT4, the negative measuring end of the current sensor CT is connected with the live wire terminal of the single-phase power grid 9, and the measuring signal output end of the current sensor CT is connected with the MPU controller 1.
The input end of the first driving module 7 is connected to the MPU controller 1, and the output end of the first driving module 7 is connected to the gate of the first power transistor Q1 in the flyback converter 4.
The input end of the second driving module 8 is connected to the MPU controller 1, the first output end of the second driving module 8 is connected to the gates of the second power transistor Q2 and the fifth power transistor Q5 in the inverter bridge 5, and the second output end of the second driving module 8 is connected to the gates of the third power transistor Q3 and the fourth power transistor Q4 in the inverter bridge 5.
The LC filter 3 includes a first inductor L1 and a first capacitor C1; one end of the first inductor L1 is connected to the positive end of the single-phase output of the rectifier 2, the other end of the first inductor L1 is connected to the positive electrode of the first capacitor C1, and the negative electrode of the first capacitor C1 is connected to the negative end of the single-phase output of the rectifier 2.
The flyback converter 4 comprises a flyback transformer TX1, a first power tube Q1, a diode D and a second capacitor C2; one input end of the flyback transformer TX1 is connected with the positive output end of the LC filter 3, and the other input end of the flyback transformer TX1 is connected with the drain of the first power tube Q1; one output end of the flyback transformer TX1 is connected with the anode of the diode D, and the other output end of the flyback transformer TX1 is connected with the cathode of the second capacitor C2; the cathode of the diode D is connected with the anode of the second capacitor C2; the anode of the second capacitor C2 is connected with the positive input terminal of the inverter bridge 5, and the cathode of the second capacitor C2 is connected with the negative input terminal of the inverter bridge 5; the gate of the first power transistor Q1 is connected to the output terminal of the first driving module 7, the source of the first power transistor Q1 is connected to the negative output terminal of the LC filter 3, and the drain of the first power transistor Q1 is connected to the other input terminal of the flyback transformer TX 1.
The inverter bridge 5 comprises a second power tube Q2, a third power tube Q3, a fourth power tube Q4 and a fifth power tube Q5; the gate of the second power tube Q2 and the gate of the fifth power tube Q5 are respectively connected to the first output end of the second driving module 8, the gate of the third power tube Q3 and the gate of the fourth power tube Q4 are respectively connected to the second output end of the second driving module 8, the source of the second power tube Q2 is connected to the drain of the fourth power tube Q4, the drain of the second power tube Q2 is connected to the positive output end of the flyback converter, the drain of the third power tube Q3 is connected to the drain of the second power tube Q2, the source of the third power tube Q3 is connected to the drain of the fifth power tube Q5, the source of the fourth power tube Q4 is connected to the negative output end of the flyback converter 4, and the source of the fifth power tube Q5 is connected to the source of the fourth power tube Q4.
The LCL filter 6 includes a second inductor L2, a third capacitor C3, and a third inductor L3; one end of the second inductor L2 is connected to the positive output terminal of the inverter bridge 5, and the other end of the second inductor L2 is connected to the positive electrode of the third capacitor C3; the negative electrode of the third capacitor C3 is connected with the negative output end of the inverter bridge 5; one end of the third inductor L3 is connected to the positive electrode of the third capacitor C3, and the other end of the third inductor L3 is connected to the positive measurement terminal of the current sensor CT.
In one embodiment of the present invention, the permanent-magnet direct-drive wind turbine GS is a small permanent-magnet direct-drive wind turbine, the diameter of the wind wheel is 1.3m, the rated power is 300W, the rated voltage is 24V, the rated rotation speed is 800r/min, the starting wind speed is 1m/s, and the rated wind speed is 10 m/s; the MPU controller 1 selects a high-performance floating point digital signal processor TMS320F28335 of TI company, the rectifier 2 selects a rectification module with the model number of SQL50A/1000V, and the first inductor L1 selects an inductor of 1 mH; the first capacitor C1 is an electrolytic capacitor of 2200 uF; the type of the flyback transformer TX1 is NA 5814-AL; the model of the first power tube Q1 is TK50X15J 1; the model of the diode D is C2D 05120E; the second capacitor C2 is a nonpolar capacitor of 0.47 uF; the model of the second power tube Q2, the third power tube Q3, the fourth power tube Q4 and the fifth power tube Q5 is IPB60R190C 6; the models of the first driving module 7 and the second driving module 8 are MCP14E 4; the second inductor L2 in the LCL filter 6 is an inductor of 0.5 mH; the third inductor L3 is an inductor of 0.1 mH; the third capacitor C3 is a nonpolar capacitor of 0.47 uf; the first to fourth voltage sensors UT 1-UT 4 all adopt Hall voltage sensors CHV-25P; the current sensor CT adopts a Hall current sensor ACS712 ELCTR-058-1.
The grid-connected inverter device for the permanent magnet direct-drive wind turbine according to the present invention has been described above by way of example with reference to the accompanying drawings. However, it should be understood by those skilled in the art that, for the above-mentioned permanent magnet direct-drive wind turbine grid-connected inverter device proposed by the present invention, various improvements can be made to the implementation details therein without departing from the contents of the present invention. Therefore, the scope of the present invention should be determined by the content of the appended claims.
Claims (5)
1. The utility model provides a permanent magnetism directly drives fan grid-connected inverter device which characterized in that includes: the device comprises an MPU controller (1), a rectifier (2), an LC filter (3), a flyback converter (4), an inverter bridge (5), an LCL filter (6), a first driving module (7), a second driving module (8), a first voltage sensor (UT1), a second voltage sensor (UT2), a third voltage sensor (UT3), a fourth voltage sensor (UT4) and a current sensor (CT); wherein,
the three-phase input end of the rectifier (2) is connected with the three-phase output end of the permanent-magnet direct-drive fan (GS), the single-phase output positive end of the rectifier (2) is connected with the input positive end of the LC filter (3), and the single-phase output negative end of the rectifier (2) is connected with the input negative end of the LC filter (3);
the output positive end of the LC filter (3) is connected with the input positive end of the flyback converter (4), and the output negative end of the LC filter (3) is connected with the input negative end of the flyback converter (4);
the positive output end of the flyback converter (4) is connected with the positive input end of the inverter bridge (5), and the negative output end of the flyback converter (4) is connected with the negative input end of the inverter bridge (5);
the positive output end of the inverter bridge (5) is connected with the positive input end of the LCL filter (6), and the negative output end of the inverter bridge (5) is connected with the negative input end of the LCL filter (6);
the output positive end of the LCL filter (6) is connected with the measurement positive end of the fourth voltage sensor (UT4), and the output negative end of the LCL filter (6) is connected with the measurement negative end of the fourth voltage sensor (UT 4);
the positive measuring terminal of the first voltage sensor (UT1) is connected with the positive electrode of a first capacitor (C1) in the LC filter (3), the negative measuring terminal of the first voltage sensor (UT1) is connected with the negative electrode of the first capacitor (C1), and the signal measuring output terminal of the first voltage sensor (UT1) is connected with the MPU controller (1);
the positive measuring terminal of the second voltage sensor (UT2) is connected with the positive electrode of a second capacitor (C2) in the flyback converter (4), the negative measuring terminal of the second voltage sensor (UT2) is connected with the negative electrode of the second capacitor (C2), and the signal measuring output terminal of the second voltage sensor (UT2) is connected with the MPU controller (1);
the positive measuring terminal of the third voltage sensor (UT3) is connected with the positive electrode of a third capacitor (C3) in the LCL filter (6), the negative measuring terminal of the third voltage sensor (UT3) is connected with the negative electrode of the third capacitor (C3), and the signal measuring output terminal of the third voltage sensor (UT3) is connected with the MPU controller (1);
the positive measuring terminal of the fourth voltage sensor (UT4) is connected with the positive output terminal of the LCL filter (6), the negative measuring terminal of the fourth voltage sensor (UT4) is connected with the negative output terminal of the LCL filter (6), and the signal measuring output terminal of the fourth voltage sensor (UT4) is connected with the MPU controller (1);
the positive measuring end of the current sensor (CT) is connected with the positive measuring end of the fourth voltage sensor (UT4), the negative measuring end of the current sensor (CT) is connected with the live wire terminal of a single-phase power grid (9), and the measuring signal output end of the current sensor (CT) is connected with the MPU controller (1);
the input end of the first driving module (7) is connected with the MPU controller (1), and the output end of the first driving module (7) is connected with the grid electrode of a first power tube (Q1) in the flyback converter (4);
the input end of the second driving module (8) is connected with the MPU controller (1), the first output end of the second driving module (8) is connected with the gates of a second power tube (Q2) and a fifth power tube (Q5) in the inverter bridge (5), and the second output end of the second driving module (8) is connected with the gates of a third power tube (Q3) and a fourth power tube (Q4) in the inverter bridge (5).
2. The grid-connected inverter device for the permanent-magnet direct-drive wind turbine according to claim 1,
the LC filter (3) comprises a first inductance (L1) and the first capacitance (C1); wherein one end of the first inductor (L1) is connected with the positive single-phase output end of the rectifier (2), the other end of the first inductor (L1) is connected with the positive electrode of the first capacitor (C1), and the negative electrode of the first capacitor (C1) is connected with the negative single-phase output end of the rectifier (2).
3. The grid-connected inverter device for the permanent-magnet direct-drive wind turbine according to claim 1,
the flyback converter (4) comprises a flyback transformer (TX1), the first power tube (Q1), a diode (D) and the second capacitor (C2); wherein one input end of the flyback transformer (TX1) is connected with the positive output end of the LC filter (3), and the other input end of the flyback transformer (TX1) is connected with the drain electrode of the first power tube (Q1); one output end of the flyback transformer (TX1) is connected with the anode of the diode (D), and the other output end of the flyback transformer (TX1) is connected with the cathode of the second capacitor (C2); the cathode of the diode (D) is connected with the anode of the second capacitor (C2); the anode of the second capacitor (C2) is connected with the positive input end of the inverter bridge (5), and the cathode of the second capacitor (C2) is connected with the negative input end of the inverter bridge (5); the grid electrode of the first power tube (Q1) is connected with the output end of the first driving module (7), the source electrode of the first power tube (Q1) is connected with the negative output end of the LC filter (3), and the drain electrode of the first power tube (Q1) is connected with the other input end of the flyback transformer (TX 1).
4. The grid-connected inverter device for the permanent-magnet direct-drive wind turbine according to claim 1,
the inverter bridge (5) comprises the second power tube (Q2), the third power tube (Q3), the fourth power tube (Q4) and the fifth power tube (Q5); wherein a gate of the second power transistor (Q2) and a gate of the fifth power transistor (Q5) are respectively connected with a first output terminal of the second driving module (8), a gate of the third power transistor (Q3) and a gate of the fourth power transistor (Q4) are respectively connected with a second output terminal of the second driving module (8), a source of the second power transistor (Q2) is connected with a drain of the fourth power transistor (Q4), a drain of the second power transistor (Q2) is connected with a positive output terminal of the flyback converter (4), a drain of the third power transistor (Q3) is connected with a drain of the second power transistor (Q2), a source of the third power transistor (Q3) is connected with a drain of the fifth power transistor (Q5), and a source of the fourth power transistor (Q4) is connected with a negative output terminal of the flyback converter (4), the source electrode of the fifth power tube (Q5) is connected with the source electrode of the fourth power tube (Q4).
5. The grid-connected inverter device for the permanent-magnet direct-drive wind turbine according to claim 1,
the LCL filter (6) comprises a second inductance (L2), the third capacitance (C3) and a third inductance (L3); wherein one end of the second inductor (L2) is connected with the positive output terminal of the inverter bridge (5), and the other end of the second inductor (L2) is connected with the anode of the third capacitor (C3); the negative electrode of the third capacitor (C3) is connected with the negative output end of the inverter bridge (5); one end of the third inductor (L3) is connected with the positive electrode of the third capacitor (C3), and the other end of the third inductor (L3) is connected with the positive measurement terminal of the current sensor (CT).
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| CN201621215536.6U CN206148964U (en) | 2016-11-11 | 2016-11-11 | Permanent -magnet direct -drive fan grid -connected inverter device |
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| CN201621215536.6U CN206148964U (en) | 2016-11-11 | 2016-11-11 | Permanent -magnet direct -drive fan grid -connected inverter device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108075482A (en) * | 2016-11-11 | 2018-05-25 | 中科诺维(北京)科技有限公司 | Permanent magnet direct-drive wind turbine gird-connected inverter device and control method |
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| CN108075482A (en) * | 2016-11-11 | 2018-05-25 | 中科诺维(北京)科技有限公司 | Permanent magnet direct-drive wind turbine gird-connected inverter device and control method |
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