CN213521673U - Single-machine serial 65kW boosting device based on sic application - Google Patents
Single-machine serial 65kW boosting device based on sic application Download PDFInfo
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- CN213521673U CN213521673U CN202022401853.XU CN202022401853U CN213521673U CN 213521673 U CN213521673 U CN 213521673U CN 202022401853 U CN202022401853 U CN 202022401853U CN 213521673 U CN213521673 U CN 213521673U
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Abstract
The utility model discloses a unit serial-type 65kW booster unit based on sic is used belongs to the technical field that steps up. The utility model discloses in the booster unit includes input circuit, sic full-bridge circuit, high frequency isolation transformer, rectifier and filter circuit, output circuit, the input circuit output is connected with sic full-bridge circuit input, sic full-bridge circuit output is connected with rectifier and filter circuit through high frequency isolation transformer, rectifier and filter circuit output is connected with the output circuit input. The booster unit has overcome present booster unit power low, bulky, the weight is heavy not enough, has realized each item advantage such as power is big, small, light in weight, and the configuration can make the vehicle wholly alleviate in railway vehicle, and inside operating space is bigger.
Description
Technical Field
The utility model relates to a technical field that steps up specifically is a unit serial-type 65kW booster unit based on sic is used.
Background
In the power electronics industry, power modules have been favored by power system designers due to their unique capabilities. A good power device should not only have excellent performance, but also have outstanding advantages in terms of footprint, power density, material cost, etc.
At present, most of the boost devices configured for railway vehicles in China have low power, and the IGBT is still used as a core power device, and the operating frequency of the IGBT is below 20kHz, so that the problems of overlarge volume and overweight weight of a magnetic element cannot be solved no matter which topological structure is applied, and the overall external dimension of the equipment is overlarge and overweight weight is caused. With the progress of science and technology, people tend to reduce the weight and size of products.
Aiming at the problems, a single-machine serial 65kW boosting device based on sic application is designed for solving the technical problems of low power, large volume, heavy weight and the like of the boosting device in the prior art.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a unit serial-type 65kW booster unit based on sic uses to solve the problem among the prior art.
In order to solve the technical problem, the utility model provides a following technical scheme:
a single-machine serial 65kW booster device based on sic application comprises an input circuit, a sic full-bridge circuit, a high-frequency isolation transformer, a rectification filter circuit and an output circuit, wherein the output end of the input circuit is connected with the input end of the sic full-bridge circuit, the output end of the sic full-bridge circuit is connected with the rectification filter circuit through the high-frequency isolation transformer, and the output end of the rectification filter circuit is connected with the input end of the output circuit;
the utility model discloses an including input magnetic ring, input electric capacity, input fuse, input owner contactor, input pre-charge contactor, pre-charge resistance, input voltage sensor, input current sensor under the input circuit, input fuse one end is connected the input magnetic ring, the other end connect input owner contactor with input pre-charge contactor the input owner contactor with input pre-charge contactor, pre-charge resistance be connected with parallel mode input pre-charge contactor is connected with pre-charge resistance with series connection, input voltage carries out the pre-charge after input magnetic ring and input fuse, accomplishes the back in the pre-charge, will input always contactor and close, reaches the effect of pre-charge circuit short circuit.
Furthermore, the input voltage sensor is connected with the input current sensor in parallel, one end of the input current sensor is connected with the input main contactor and the pre-charging resistor, the other end of the input current sensor is connected with the input magnetic ring, the input current passes through the input current sensor, and the input voltage sensor detects an input voltage value.
The utility model discloses an including supporting electric capacity discharge resistance, supporting electric capacity, sic module, sic absorption electric capacity, sic drive plate, blocking electric capacity among the sic full bridge circuit, supporting electric capacity discharge resistance and supporting electric capacity, sic absorption electric capacity are connected with parallel connection, and the stability of output voltage is guaranteed in the existence of supporting electric capacity, adds discharge resistance and can guarantee to support electric capacity voltage can fall below the 36V safe voltage in the regulation time after the equipment outage.
Furthermore, one end of the sic module is connected with the sic driving board, the other end of the sic module is connected with the blocking capacitor, the driving board drives the switch of the sic module and provides short-circuit protection, and the blocking capacitor can remove the direct current component of the circuit to prevent the transformer from being saturated.
The utility model discloses a high frequency isolation transformer adopts four elementary parallelly connected secondary two parallelly connected modes to connect.
The utility model discloses a rectifier and filter circuit includes rectifier and filter module, unit output voltage sensor, rectifier and filter module one end is connected high frequency isolation transformer, and output circuit is connected to the other end, unit output voltage sensor connects in parallel at rectifier and filter module both ends, inserts rectifier and filter module after two liang of parallelly connected of high frequency isolation transformer secondary, carries out steady voltage and overvoltage protection for the control panel by unit output voltage sensor sampling output voltage.
The utility model discloses an output circuit includes output contactor, differential current sensor, output magnetic ring, absorption capacitor, output isolation diode, output voltage sensor, output current sensor, output terminal, the output is kept apart the diode and is connected with series connection with output contactor, absorption capacitor connects in parallel at output contactor both ends, the absorption capacitor positive line is kept apart the diode input with the output and is connected, the absorption capacitor negative line passes output current sensor and is kept apart the diode output with the output and be connected, closed output contactor, the total output after the unit is established ties is connected to absorption capacitor through differential current sensor and output magnetic ring, and the positive line is connected to the output and keeps apart the diode, and the negative line passes behind the output current sensor and keeps apart diode output and together be connected to the terminal row, and the operation is accomplished.
Compared with the prior art, the utility model discloses the beneficial effect who reaches is: the utility model discloses a unit serial-type 65kW booster unit based on sic is used, simple structure, the practicality is strong, has overcome present booster unit power low, bulky, the weight is heavy not enough, has realized each item advantage such as power big, small, light in weight, accords with the trend development direction of lightweight, miniaturization, uses in the railway vehicle, can make the vehicle wholly alleviate, and the internal operation space is bigger.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic structural diagram of an overall circuit of a stand-alone serial 65kW booster device based on sic application;
FIG. 2 is a schematic structural diagram of an input circuit of a stand-alone serial 65kW booster device based on sic application;
FIG. 3 is a schematic structural diagram of a single-unit serial 65kW booster device sic full-bridge circuit based on sic application;
FIG. 4 is a schematic structural diagram of a high-frequency isolation transformer of a single-unit tandem type 65kW booster device based on sic application;
FIG. 5 is a schematic structural diagram of a rectification filter circuit of a single-unit serial 65kW booster device based on sic application;
FIG. 6 is a schematic structural diagram of an output circuit of a stand-alone serial 65kW booster device based on sic application;
in the figure: 1. inputting a magnetic ring; 2. inputting a ground capacitance; 3. inputting a fuse; 4. inputting a main contactor; 5. an input pre-charging contactor; 6. an input voltage sensor; 7. an input current sensor; 8. a support capacitor discharge resistor; 9. a support capacitor; 10. a sic module; 11. A sic absorption capacitor; 12. a sic drive plate; 13. a blocking capacitor; 14. a high frequency isolation transformer; 15. a rectification filtering module; 16. a single machine output voltage sensor; 17. an output contactor; 18. a differential current sensor; 19. an output magnetic ring; 20. an absorption capacitance; 21. an output isolation diode; 22. an output current sensor; 23. an output terminal; 24. an output voltage sensor; 25. a pre-charge resistor.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1-6, the present invention provides a technical solution:
a single machine serial type 65kW booster device based on sic application is characterized in that an integral circuit of the booster device is illustrated in figure 1, the booster device comprises three single machines, each single machine comprises an input circuit, an sic full-bridge circuit, a high-frequency isolation transformer, a rectification filter circuit and an output circuit, the output end of the input circuit is connected with the input end of the sic full-bridge circuit, the output end of the sic full-bridge circuit is connected with the rectification filter circuit through the high-frequency isolation transformer, and the output end of the rectification filter circuit is connected with the input end of the output circuit;
in fig. 2, an input circuit of the voltage boosting device is illustrated, the input circuit includes an input magnetic ring 1, an input lower ground capacitor 2, an input fuse 3, an input main contactor 4, an input pre-charging contactor 5, a pre-charging resistor 25, an input voltage sensor 6, and an input current sensor 7, one end of the input fuse 3 is connected with the input magnetic ring 1, the other end is connected with the input main contactor 4 and the input pre-charging contactor 5, the input main contactor 4 and the input pre-charging contactor 5 are connected in parallel, the input pre-charging contactor 5 and the pre-charging resistor 25 are connected in series, the lower ground capacitor 2 includes Y1 and Y2, the input current sensor 7 includes LA1, LA2, and LA3, the input voltage is pre-charged after passing through the input magnetic ring 1 and the input fuse 3, the input main contactor 4 is closed after the pre-charging is completed, the effect of the short circuit of the pre-charging circuit is achieved, the input current passes through the input current sensor 7, and the input voltage sensor 6 detects the input voltage value.
In fig. 3, a sic full bridge circuit of a voltage boosting device is illustrated, the sic full bridge circuit includes a support capacitor discharge resistor 8, a support capacitor 9, a sic module 10, a sic absorption capacitor 11, a sic driving board 12, and a dc blocking capacitor 13, the support capacitor discharge resistor 8 is connected in parallel with the support capacitor 9 and the sic absorption capacitor 11, the support capacitor discharge resistor 8 is connected in series with the dc blocking capacitor 13, the support capacitor 9 is connected in parallel with the sic absorption capacitor 11, one end of the sic module 10 is connected to the sic driving board 12, the other end is connected to the dc blocking capacitor 13, the support capacitor discharge resistor 8 includes R2 to R6, the support capacitor 9 includes Cd1 to Cd6, the sic module 10 includes V1 to V6, the sic absorption capacitor 11 includes Cs1 to Cs6, the sic driving board 12 includes a1 to A6, the dc blocking capacitor 13 includes Cb1 to 12, the existence of the supporting capacitor 9 ensures the stability of output voltage, the addition of the supporting capacitor discharging resistor 8 can ensure that the voltage of the supporting capacitor 9 can be reduced to below 36V safe voltage within a specified time after the equipment is powered off, one end of the sic module 10 is connected with the sic drive plate 12, the other end of the sic module is connected with the blocking capacitor 13, the sic drive plate 12 drives the switch of the sic module 10 and provides short-circuit protection, and the blocking capacitor 13 can remove the direct-current component of the circuit to prevent the saturation of the transformer.
In fig. 4, an enlarged view of the high-frequency isolation transformer 14 of the boosting device is shown, and the high-frequency isolation transformer 14 includes T1 to T12, wherein the high-frequency isolation transformer of each single unit is connected in a manner that four primary transformers are connected in parallel and two secondary transformers are connected in parallel.
In fig. 5, a rectifying and filtering circuit of a voltage boosting device is illustrated, the rectifying and filtering circuit includes a rectifying and filtering module 15 and a single-machine output voltage sensor 16, the rectifying and filtering module 15 includes a7, A8 and a9, the single-machine output voltage sensor 16 includes HV1, HV2 and HV3, one end of the rectifying and filtering module 15 is connected to a high-frequency isolation transformer, the other end is connected to an output circuit, and the single-machine output voltage sensor 16 is connected in parallel to two ends of the rectifying and filtering module 15; the secondary of the high-frequency isolation transformer 14 is connected in parallel two by two and then is connected into a rectifying and filtering module 15, a single machine output voltage sensor 16 samples output voltage and carries out voltage stabilization and overvoltage protection on a control panel, and three single machines are connected in series in output.
In fig. 6, an output circuit of the voltage boosting device is illustrated, the output circuit includes an output contactor 17, a differential current sensor 18, an output magnetic ring 19, an absorption capacitor 20, an output isolation diode 21, an output voltage sensor 24, an output current sensor 22, and an output terminal 23, the output isolation diode 21 includes D1 and D2, one end of the output magnetic ring 19 is connected to the differential current sensor 18, the other end is connected to the output isolation diode 21, the absorption capacitor 20 is connected in parallel to both ends of the output contactor 17, a positive line of the absorption capacitor 20 is connected to an input end of the output isolation diode 21, a negative line of the absorption capacitor 20 passes through the output current sensor 22 and is connected to an output end of the output isolation diode 21, the output isolation diode 21 is connected to the output contactor 17 in series, an output end of the output isolation diode 21 is connected to the output terminal 23, the output voltage sensor 24 is connected in parallel across the output terminal 23. And (3) closing an output contactor 17, connecting the total output of the single-machine series connection to an absorption capacitor 20 through a differential current sensor 18 and an output magnetic ring 19, connecting a positive line to an output isolation diode 21, connecting a negative line to a terminal block 23 together with the output of the isolation diode 21 after passing through an output current sensor 22, and detecting an output voltage value by an output voltage sensor 24.
The utility model discloses a theory of operation: the utility model discloses a unit serial-type 65kW booster unit based on sic is used, through the unit series output with three maximum power 21.7kW, every unit configuration sic module and sic rectifier diode, operating frequency reaches 50kHz, reaches 65kW power output at last. The utility model discloses a miniaturized, lightweight high-power booster unit that application sic technique realized has overcome present booster unit power low, bulky, the heavy not enough of weight, has realized each item advantage such as power is big, small, light in weight.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a unit serial-type 65kW booster unit based on sic is used which characterized in that: the single-machine type full-bridge circuit comprises an input circuit, a sic full-bridge circuit, a high-frequency isolation transformer (14), a rectification filter circuit and an output circuit, wherein the output end of the input circuit is connected with the input end of the sic full-bridge circuit, the output end of the sic full-bridge circuit is connected with the rectification filter circuit through the high-frequency isolation transformer (14), and the output end of the rectification filter circuit is connected with the input end of the output circuit.
2. The stand-alone series-connected 65kW boosting device based on sic application of claim 1, wherein: the input circuit comprises an input magnetic ring (1), an input lower earth capacitor (2), an input fuse (3), an input main contactor (4), an input pre-charging contactor (5), a pre-charging resistor (25), an input voltage sensor (6) and an input current sensor (7), wherein the input lower earth capacitor (2) is connected with the input fuse (3) in series, one end of the input fuse (3) is connected with the input magnetic ring (1), the other end of the input fuse (3) is connected with the input main contactor (4) and the input pre-charging contactor (5), the input main contactor (4) is connected with the input pre-charging contactor (5) and the pre-charging resistor (25) in parallel, the input pre-charging contactor (5) is connected with the pre-charging contactor (25) in series, and the input voltage sensor (6) is connected with the input current sensor (7) in parallel, one end of the input current sensor (7) is connected with the input main contactor (4) and the pre-charging resistor (25), and the other end is connected with the input magnetic ring (1).
3. The stand-alone series-connected 65kW boosting device based on sic application of claim 1, wherein: the sic full-bridge circuit comprises a support capacitor discharge resistor (8), a support capacitor (9), a sic module (10), a sic absorption capacitor (11), a sic drive plate (12) and a blocking capacitor (13), wherein the support capacitor discharge resistor (8) is connected with the support capacitor (9) and the sic absorption capacitor (11) in a parallel mode, the support capacitor discharge resistor (8) is connected with the blocking capacitor (13) in a series mode, the support capacitor (9) is connected with the sic absorption capacitor (11) in a parallel mode, one end of the sic module (10) is connected with the sic drive plate (12), and the other end of the sic module is connected with the blocking capacitor (13).
4. The stand-alone series-connected 65kW boosting device based on sic application of claim 1, wherein: the rectification filter circuit comprises a rectification filter module (15) and a single-machine output voltage sensor (16), one end of the rectification filter module (15) is connected with the high-frequency isolation transformer, the other end of the rectification filter module is connected with the output circuit, and the single-machine output voltage sensor (16) is connected to two ends of the rectification filter module (15) in parallel.
5. The stand-alone series-connected 65kW boosting device based on sic application of claim 1, wherein: the output circuit comprises an output contactor (17), a differential current sensor (18), an output magnetic ring (19), an absorption capacitor (20), an output isolation diode (21), an output voltage sensor (24), an output current sensor (22) and an output terminal (23), one end of the output magnetic ring (19) is connected with the differential current sensor (18), the other end of the output magnetic ring is connected with the output isolation diode (21), the absorption capacitor (20) is connected with two ends of the output contactor (17) in parallel, a positive line of the absorption capacitor (20) is connected with an input end of the output isolation diode (21), a negative line of the absorption capacitor (20) penetrates through the output current sensor (22) to be connected with an output end of the output isolation diode (21), the output isolation diode (21) is connected with the output contactor (17) in series, and an output end of the output isolation diode (21) is connected with the output terminal (, the output voltage sensor (24) is connected in parallel to two ends of the output terminal (23).
6. The stand-alone series-connected 65kW boosting device based on sic application of claim 1, wherein: and the peak power of the three single machines is 21.7kW, the three single machines are connected in series, and a sic module and a sic rectifying diode are configured, so that the working frequency reaches 50 kHz.
7. The stand-alone series-connected 65kW boosting device based on sic application of claim 1, wherein: and the output of the three single machines is connected in series to achieve 65kW power output.
8. The stand-alone series-connected 65kW boosting device based on sic application of claim 1, wherein: the high-frequency isolation transformer (14) is connected in a mode that four primary circuits are connected in parallel and two secondary circuits are connected in parallel.
9. The stand-alone series-connected 65kW boosting device based on sic application of claim 2, wherein: the input ground capacitors (2) are two.
10. The stand-alone series-connected 65kW boosting device based on sic application of claim 5, wherein: the number of the output isolation diodes (21) is two.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022401853.XU CN213521673U (en) | 2020-10-26 | 2020-10-26 | Single-machine serial 65kW boosting device based on sic application |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022401853.XU CN213521673U (en) | 2020-10-26 | 2020-10-26 | Single-machine serial 65kW boosting device based on sic application |
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| CN213521673U true CN213521673U (en) | 2021-06-22 |
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| CN202022401853.XU Active CN213521673U (en) | 2020-10-26 | 2020-10-26 | Single-machine serial 65kW boosting device based on sic application |
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