FPGA-based spark flashover detection and processing system for constant-current intermediate-frequency dust removal power supply
A technology of dust removal power supply and processing system, which is applied in the field of electrostatic dust removal, can solve the problems of reducing dust removal efficiency, slow response of software identification of spark status, and difficulty in software accurate identification, so as to improve real-time performance, avoid spark recurrence, and reduce time constant. Effect
Active Publication Date: 2020-06-16
SOUTHEAST UNIV
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Problems solved by technology
The software algorithm involves sampling filtering and data processing, and the controller needs to process more sampling data, so the software recognizes the spark state and responds slowly
And for the constant current dust removal power supply, when the spark flashover occurs, the circuit current does not jump, and the accurate identification of the software is more difficult, which will cause false detection and missed detection of the spark flashover, and reduce the dust removal efficiency
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[0029] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0030] Such as figure 1 As shown, the FPGA-based constant-current intermediate frequency dust removal power supply spark flashover detection processing system of the present invention includes an FPGA module, a controller, a hysteresis signal conversion module, a current hysteresis module, a voltage comparison module with a hysteresis, and a sampling Conditioning module, power switch tube drive module.
[0031] The FPGA module and the controller are directly connected through pins, and the FPGA transmits the fault information and status information of the system to the controller through the high and low levels of the pins, and the controller controls the operation of the system by writing the control information into the RAM inside the FPGA parameter. The FPGA module includes a spark detection module, a spark processing mod...
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The invention discloses a constant-current medium-frequency dust removal power spark flashover detection processing system based on an FPGA. The system comprises an FPGA module, a main controller, a current hysteresis module, a hysteresis signal conversion module, a voltage comparison module with a hysteresis, a sampling conditioning module and a driving module. The FPGA control module receives acontroller signal and an external circuit signal, and detects and processes the spark flashover through an internal algorithm; the hysteresis signal conversion module converts a digital control signalinto a current hysteresis loop upper and lower limit analog signal; the current hysteresis module receives an actual current value and a current upper and lower limit set value to generate a drivingsignal, and the voltage comparison module with a hysteresis detects the magnitude change of the output voltage of a dust removal power supply in real time and transmits an output voltage jump signal to the FPGA. Spark flashover detection is realized based on the current change slope characteristic with the help of the assistance of the output voltage jump characteristic when the constant-current dust removal power supply generates spark flashover, so that the spark flashover detection accuracy can be improved; the characteristic of parallel execution of a hardware circuit is fully utilized, the rapidity of spark detection processing is improved, and the dynamic characteristic of the system is improved.
Description
technical field [0001] The invention relates to the field of electrostatic dust removal, in particular to an FPGA-based constant-current intermediate-frequency dust removal power supply spark flashover detection and processing system. Background technique [0002] The high-voltage dust removal power supply generates high voltage between the two electrode plates, so that the industrial smoke is charged and moves towards the electrode plates to achieve the purpose of industrial dust removal. The dust removal power supply has been widely used for its high dust removal efficiency, reliable operation and convenient maintenance. Among them, the output voltage of the dust removal power supply usually operates near the critical flashover voltage. Since the load of the power supply changes continuously with the working conditions, it is very easy to cause spark flashover on the output side of the power supply and affect the dust removal efficiency. Therefore, accurately identify and ...
Claims
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IPC IPC(8): B03C3/34G01R19/25
CPCB03C3/34G01R19/25
Inventor 金龙汪涛潘鹏徐志科赵志刚
Owner SOUTHEAST UNIV