CN211790896U - Parallel control device of direct current screen charging module - Google Patents
Parallel control device of direct current screen charging module Download PDFInfo
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- CN211790896U CN211790896U CN202020367680.1U CN202020367680U CN211790896U CN 211790896 U CN211790896 U CN 211790896U CN 202020367680 U CN202020367680 U CN 202020367680U CN 211790896 U CN211790896 U CN 211790896U
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Abstract
The utility model discloses a parallel control device of direct current screen charging module, including the alternating current-direct current conversion module, take the microcontroller of C28x kernel and control law accelerator CLA, input signal's input sampling circuit, output sampling circuit and switch drive circuit, the alternating current-direct current conversion module includes high frequency full-bridge inverter circuit, switch drive circuit is arranged in controlling the switching element among the high frequency full-bridge inverter circuit, high frequency full-bridge inverter circuit and microcontroller are connected to the switch drive circuit electricity, alternating current-direct current conversion module and microcontroller are connected to the input sampling circuit electricity, alternating current-direct current conversion module and microcontroller are connected to the output sampling circuit electricity. The parallel control system of the charging module is designed by C28x and CLA of the microcontroller, so that the control frequency of the charging module can be improved, the volume of the whole charging module is reduced, conditions are provided for executing more complex algorithm to carry out closed-loop control on the charging module, and the reliability of the charging module and the whole direct current screen system is improved.
Description
Technical Field
The utility model relates to a direct current screen controlling means especially relates to a direct current screen charging module's parallel control device.
Background
The direct current screen is a device for realizing control and protection in a power plant and a transformer substation, and mainly comprises a mating electricity module, a charging module, a monitoring module, a voltage reduction silicon chain module, a direct current feeding module, an insulation monitoring module, a battery cabinet and the like. In the direct current screen system, the function of the charging module is to convert an alternating current power supply into a high-quality direct current power supply to reliably charge the battery cabinet, and meanwhile, the charging module has various protection functions inside, researches the digital control technology of the charging module, and can further improve the reliability of the charging module and improve the quality of output waveforms.
At present, most charging modules of the direct current screen are controlled by a traditional single-core CPU, the number of programs to be executed by the charging modules is large, the programs include closed-loop control of a high-frequency inversion module, protection of the charging modules, a man-machine interaction function and information interaction with a monitoring module, the control frequency is limited due to traditional serial control, the size of a high-frequency transformer cannot be further reduced, meanwhile, a complex control algorithm is difficult to achieve, and the performance of the charging modules is limited.
SUMMERY OF THE UTILITY MODEL
The utility model provides a direct current screen charging module's parallel control device, it has overcome in the background art the not enough of prior art.
The utility model provides a technical scheme that its technical problem adopted is:
the parallel control device of the direct current screen charging module comprises an alternating current-direct current conversion module which is used for converting three-phase alternating current input into direct current output, a microcontroller with a C28x kernel and a control law accelerator CLA, an input sampling circuit used for sampling input signals of the alternating current-direct current conversion module, an output sampling circuit used for sampling output signals of the alternating current-direct current conversion module and a switch driving circuit, wherein the alternating current-direct current conversion module comprises a high-frequency full-bridge inverter circuit, the switch driving circuit is used for controlling a switch device in the high-frequency full-bridge inverter circuit, the switch driving circuit is electrically connected with the high-frequency full-bridge inverter circuit and the microcontroller, the input sampling circuit is electrically connected with the alternating current-direct current conversion module and the microcontroller, and the output sampling circuit is electrically connected with the alternating current-.
In one embodiment: the AC-DC conversion module also comprises an input EMI filter circuit, a first rectifying circuit with a power correction module PFC, a high-frequency transformer, a second rectifying circuit and an output EMI filter circuit, wherein the input end of the input EMI filter circuit is connected with a three-phase AC power supply, the input EMI filter circuit, the first rectifying circuit, the high-frequency full-bridge inverter circuit, the high-frequency transformer, the second rectifying circuit and the output EMI filter circuit are sequentially connected in series according to the connection of the output ends and the input ends of the front circuit and the rear circuit, and the output end of the output EMI filter circuit outputs a DC power supply.
In one embodiment: the input sampling circuit is electrically connected to the output end of the input EMI filter circuit, and the output sampling circuit is electrically connected to the input end of the output EMI filter circuit.
In one embodiment: the C28x kernel of the microcontroller is electrically connected with the input sampling circuit, and the control law accelerator CLA of the microcontroller is electrically connected with the output sampling circuit and the switch driving circuit.
In one embodiment: the C28x kernel of the microcontroller is also electrically connected with the CAN communication circuit and the man-machine interaction circuit.
In one embodiment: the microcontroller is a DSP model TMS320F 28069.
Compared with the background technology, the technical scheme has the following advantages:
the C28x and CLA adopting the microcontroller design a parallel control system of the charging module, the control frequency of the charging module can be improved through the parallel design, the volume of the high-frequency transformer is reduced, the volume of the whole charging module is reduced, the function of the charging module is perfected, conditions are provided for executing more complex algorithm to perform closed-loop control on the charging module, and the reliability of the charging module and the whole direct current screen system is improved.
Drawings
The present invention will be further explained with reference to the drawings and examples.
Fig. 1 is a schematic diagram of an overall circuit structure of a parallel control device of a dc screen charging module according to this embodiment.
Fig. 2 is a schematic diagram of the connection between the microcontroller and the peripheral circuit according to the present embodiment.
Detailed Description
Referring to fig. 1 and 2, the parallel control device for the dc panel charging module includes an ac/dc conversion module for converting three-phase ac input into dc output, a microcontroller 1 with a C28x core and a control law accelerator CLA, an input sampling circuit 2 for sampling an input signal of the ac/dc conversion module, an output sampling circuit 3 for sampling an output signal of the ac/dc conversion module, and a switch driving circuit 4, the ac-dc conversion module comprises a high frequency full-bridge inverter circuit 51, the switch driving circuit 4 is used for controlling the switch devices in the high frequency full-bridge inverter circuit 51, the switch driving circuit 4 is electrically connected with the high-frequency full-bridge inverter circuit 51 and the microcontroller 1, the input sampling circuit 2 is electrically connected with the ac/dc conversion module and the microcontroller 1, and the output sampling circuit 3 is electrically connected with the ac/dc conversion module and the microcontroller 1.
In this embodiment, the ac-dc conversion module further includes an input EMI filter circuit 52, a first rectifier circuit 53 with a power correction module PFC, a high-frequency transformer 54, a second rectifier circuit 55, and an output EMI filter circuit 56, wherein an input end of the input EMI filter circuit 52 is connected to a three-phase ac power supply, the input EMI filter circuit 52, the first rectifier circuit 53, the high-frequency full-bridge inverter circuit 51, the high-frequency transformer 54, the second rectifier circuit 55, and the output EMI filter circuit 56 are connected in series in sequence according to the connection between output ends of front and rear circuits and an input end, and an output end of the output EMI filter circuit 56 outputs a dc power supply. That is, the output terminal of the input EMI filter circuit 52 is connected to the input terminal of the first rectifier circuit 53, the output terminal of the first rectifier circuit 53 is connected to the input terminal of the high-frequency full-bridge inverter circuit 51, the output terminal of the high-frequency full-bridge inverter circuit 51 is connected to the input terminal of the high-frequency transformer 54, the output terminal of the high-frequency transformer 54 is connected to the input terminal of the second rectifier circuit 55, and the output terminal of the second rectifier circuit 55 is connected to the input terminal of the output EMI filter circuit 56. The second rectifying circuit 55 preferably includes a filter circuit to smooth the output dc power. The power correction module PFC of the first rectification circuit 53 is a three-phase passive PFC. The input sampling circuit 2 is electrically connected to the output of the input EMI filter circuit 52 and the output sampling circuit 3 is electrically connected to the input of the output EMI filter circuit 56. The input of the main circuit is a three-phase alternating current power supply, the three-phase alternating current power supply is converted into direct current after being input into an EMI filter circuit 52 and a first rectifying circuit 53, the direct current power supply is output through a high-frequency full-bridge inverter circuit 51 to obtain high-frequency alternating square waves through inversion, the alternating square waves are isolated by a high-frequency transformer 54 and then pass through a second rectifying circuit 55 and an output EMI filter circuit 56, and a plurality of charging modules are connected in parallel to charge a battery cabinet in a direct current screen system.
In this embodiment, the C28x core of the microcontroller is electrically connected to the input sampling circuit 2, and the control law accelerator CLA of the microcontroller 1 is electrically connected to the output sampling circuit 3 and the switch driving circuit 4.
The C28x kernel of the microcontroller 1 CAN be electrically connected with the CAN communication circuit 6 and the human-computer interaction circuit 7. The CAN communication circuit 6 may be adapted to be connected to a monitoring module of a dc screen,
in this embodiment, the microcontroller 1 is a DSP of model TMS320F28069, but is not limited to this model.
The microcontroller capable of realizing parallel control is adopted, a parallel control system of the charging module is designed, parallel execution of programs can be realized, and execution efficiency of system programs is improved, so that control frequency of the system is improved, the size of a high-frequency transformer is reduced, functions of the charging module are perfected, a more complex control algorithm is applied to high-frequency full-bridge inversion, reliability of the whole direct-current screen system is improved, and the parallel control system has certain research significance.
The above description is only a preferred embodiment of the present invention, and therefore the scope of the present invention should not be limited by this description, and all equivalent changes and modifications made within the scope and the specification of the present invention should be covered by the present invention.
Claims (6)
1. The parallel control device of the direct current screen charging module is characterized in that: the AC-DC conversion module comprises an AC-DC conversion module which is input by three phases of AC and converted into DC output, a microcontroller with a C28x kernel and a control law accelerator CLA, an input sampling circuit for sampling input signals of the AC-DC conversion module, an output sampling circuit for sampling output signals of the AC-DC conversion module and a switch driving circuit, wherein the AC-DC conversion module comprises a high-frequency full-bridge inverter circuit, the switch driving circuit is used for controlling a switch device in the high-frequency full-bridge inverter circuit, the switch driving circuit is electrically connected with the high-frequency full-bridge inverter circuit and the microcontroller, the AC-DC conversion module and the microcontroller are electrically connected with the input sampling circuit, and the AC-DC conversion module and the microcontroller are electrically connected with the output sampling circuit.
2. The parallel control device of the direct current screen charging module according to claim 1, characterized in that: the AC-DC conversion module also comprises an input EMI filter circuit, a first rectifying circuit with a power correction module PFC, a high-frequency transformer, a second rectifying circuit and an output EMI filter circuit, wherein the input end of the input EMI filter circuit is connected with a three-phase AC power supply, the input EMI filter circuit, the first rectifying circuit, the high-frequency full-bridge inverter circuit, the high-frequency transformer, the second rectifying circuit and the output EMI filter circuit are sequentially connected in series according to the connection of the output ends and the input ends of the front circuit and the rear circuit, and the output end of the output EMI filter circuit outputs a DC power supply.
3. The parallel control device of the DC screen charging module according to claim 2, characterized in that: the input sampling circuit is electrically connected to the output end of the input EMI filter circuit, and the output sampling circuit is electrically connected to the input end of the output EMI filter circuit.
4. The parallel control device of the DC screen charging module according to claim 3, wherein: the C28x kernel of the microcontroller is electrically connected with the input sampling circuit, and the control law accelerator CLA of the microcontroller is electrically connected with the output sampling circuit and the switch driving circuit.
5. The parallel control device of the DC screen charging module according to claim 4, wherein: the C28x kernel of the microcontroller is also electrically connected with the CAN communication circuit and the man-machine interaction circuit.
6. The parallel control device of the direct current screen charging module according to any one of claims 1-5, characterized in that: the microcontroller is a DSP model TMS320F 28069.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020367680.1U CN211790896U (en) | 2020-03-20 | 2020-03-20 | Parallel control device of direct current screen charging module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020367680.1U CN211790896U (en) | 2020-03-20 | 2020-03-20 | Parallel control device of direct current screen charging module |
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| Publication Number | Publication Date |
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| CN211790896U true CN211790896U (en) | 2020-10-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020367680.1U Active CN211790896U (en) | 2020-03-20 | 2020-03-20 | Parallel control device of direct current screen charging module |
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| CN (1) | CN211790896U (en) |
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2020
- 2020-03-20 CN CN202020367680.1U patent/CN211790896U/en active Active
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