CN113890408A - Active oscillation pulse type micro-arc oxidation power supply system and discharge control method - Google Patents
Active oscillation pulse type micro-arc oxidation power supply system and discharge control method Download PDFInfo
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- H—ELECTRICITY
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Abstract
The invention discloses an active oscillation pulse type micro-arc oxidation power supply system which comprises a human-computer interface module, a main control panel, a bidirectional pulse output module, an IGBT (insulated gate bipolar transistor) driving module, a filtering module, a pulse detection module and a high-frequency oscillation module, wherein the human-computer interface module is connected with the main control panel; the human-computer interface module is communicated with the main control panel, and the main control panel receives the parameters input by the human-computer interface module and generates oscillation pulses; the bidirectional pulse output module, the filtering module, the IGBT driving module and the high-frequency oscillation module are respectively connected with the main control panel module, and the high-frequency pulse generated by the high-frequency oscillation module is coupled with the micro-arc oxidation pulse generated by the bidirectional pulse output module at the output end, so that the active oscillation of the pulse in the micro-arc oxidation process is realized; the pulse detection module is used for detecting the current and the voltage of the oscillation pulse to realize closed-loop control. The invention can obtain a compact and uniform micro-arc oxidation film layer, thereby improving the performance of the film layer.
Description
Technical Field
The invention relates to the technical field of material surface corrosion prevention, in particular to an active oscillation pulse type micro-arc oxidation power supply system and a discharge control method.
Background
The light weight of metal is the bottleneck of the development of key parts, and aluminum alloy are widely applied to the fields of aviation, aerospace, ships, chemical engineering and the like by virtue of the advantages of small specific gravity, high specific strength, easiness in forming and the like. However, the aluminum alloy member for ships and warships serving in marine environment suffers from severe corrosion because seawater is a typical strong electrolyte solution, so that the average life of the material is reduced by more than 40%. Therefore, research on high-performance anticorrosive coatings is urgently needed, and the coating has important significance for prolonging the service life of ship components in corrosive environments.
With the development of micro-arc oxidation technology and industrial application thereof, the influence of a power supply as a key device on micro-arc oxidation is widely concerned, the micro-arc oxidation technology becomes a new surface modification technology by virtue of the advantages of energy conservation, environmental protection and the like, and the power supply as the core of the micro-arc oxidation technology becomes a key component for determining the performance of a prepared film layer. However, the surface of the film prepared based on the existing micro-arc oxidation power supply has a large crater shape and diameter, so that the corrosion resistance of the film is difficult to greatly improve.
The influence of the characteristics and parameters of the power supply is essentially the influence of the pulse energy of the power supply, and the power supply capable of accurately controlling the pulse energy is the main research direction at present.
Disclosure of Invention
The purpose of the invention is as follows: in order to overcome the defects in the prior art, the invention provides a method for preparing a composite material
The technical scheme is as follows: in order to achieve the aim, the invention provides an active oscillation pulse type micro-arc oxidation power supply system which comprises a human-computer interface module, a main control board, a bidirectional pulse output module, an IGBT driving module, a filtering module, a pulse detection module and a high-frequency oscillation module, wherein the human-computer interface module is connected with the main control board;
the human-computer interface module can be communicated with an ARM of a main control panel, and the main control panel receives the parameters input by the human-computer interface module and generates oscillation pulses; the bidirectional pulse output module, the filtering module, the IGBT driving module and the high-frequency oscillation module are respectively connected with the main control panel module, and the high-frequency pulse generated by the high-frequency oscillation module is coupled with the micro-arc oxidation pulse generated by the bidirectional pulse output module at the output end to generate oscillation pulse, so that the active oscillation of the pulse in the micro-arc oxidation process is realized; the pulse detection module is used for detecting the current and the voltage of the oscillation pulse to realize closed-loop control.
Further, in the present invention: the main control board comprises a chip TC275, an I/O interface, an RS232 interface, a current acquisition ADC, a voltage acquisition ADC, a signal conditioning circuit, a high-frequency pulse generating circuit and a bidirectional micro-arc pulse generating circuit;
wherein, the I/O interface is used for external keys such as starting, stopping and controlling the cooling pump; the RS232 interface is used for parameter interaction between the main control panel and the human-computer interface; the bidirectional micro-arc pulse generating circuit can generate micro-arc pulses; the high-frequency pulse signals output by the main control board are respectively transmitted to IGBT gate poles of the bidirectional pulse output module and the high-frequency oscillation module through the IGBT driving module; the bidirectional pulse output module and the IGBT driving module respectively generate high-frequency pulses and micro-arc oxidation pulses for micro-arc treatment, the high-frequency pulses and the micro-arc oxidation pulses are coupled and output to an output end, and voltage and current are treated by the signal conditioning circuit and then are respectively transmitted to a current acquisition ADC channel and a voltage acquisition ADC channel to form closed-loop control.
Further, in the present invention: the bidirectional pulse output module comprises a first IGBT switch tube Q1, a second GBT switch tube Q2, a bypass capacitor, a first reverse cut-off diode D1 and a second reverse cut-off diode D2, the bypass capacitor further comprises a first decoupling capacitor C1, a second decoupling capacitor C2, a third decoupling capacitor C3, a fourth decoupling capacitor C4, a fifth decoupling capacitor C5, a sixth decoupling capacitor C6, a seventh decoupling capacitor C7 and an eighth decoupling capacitor C8, and the bypass capacitor can provide filtering for two ends of a power supply and prevent large instantaneous voltage from being generated at an input end.
Further, in the present invention: the filter module comprises a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a ninth capacitor C9 and a tenth capacitor C10, wherein the first resistor R1 is a voltage dividing resistor and is used for limiting the voltage at two ends of the filter module circuit; the ninth capacitor C9 is a filter capacitor and can absorb high-frequency components in the input voltage; the second resistor R2, the third resistor R3, the fourth resistor R4, the fifth resistor R5 and the tenth capacitor C10 form a filter circuit, and the filter circuit performs filtering processing on micro-arc oxidation pulses to improve stability; the first resistor R1, the ninth capacitor C9 and the filter circuit are connected in parallel, and the low-frequency micro-arc oxidation pulse is input into the filter module through the first resistor R1.
Further, in the present invention: the circuit of the high-frequency oscillation module is realized by adopting a Buck topological structure, wherein a first chip P1And a third chip P3A fourteenth capacitor C for providing an energy source for the power supply14A fifteenth capacitor C15Sixteenth capacitor C16And a twelfth resistor R12Forming a filter circuit.
Further, in the present invention: the IGBT driving module comprises a first driving chip U1, a second driving chip U2, an eighteenth voltage-stabilizing capacitor C18, a nineteenth voltage-stabilizing capacitor C19, a twenty-first voltage-stabilizing capacitor C21, a twenty-second voltage-stabilizing capacitor C22, a twenty-third voltage-stabilizing capacitor C23, a fourteenth filter resistor R14 and a twentieth voltage-stabilizing capacitor C20;
pulse input signals generated by the main control board are input to a Pin2 of the first driving chip through a fourteenth filter resistor R14 and a twentieth voltage-stabilizing capacitor C20 filter circuit, and the Pin2 and the Pin3 of the first driving chip drive the GS end of the IGBT; each IGBT drive is isolated and powered by a second drive chip U2, so that mutual interference of independent paths in the drive process is avoided; the eighteenth voltage-stabilizing capacitor C18, the nineteenth voltage-stabilizing capacitor C19, the twenty-first voltage-stabilizing capacitor C21, the twenty-second voltage-stabilizing capacitor C22 and the twenty-third voltage-stabilizing capacitor C23 are used for maintaining the power supply stability of the first driving chip U1 and the second driving chip U2.
Further, in the present invention: the pulse detection module comprises a fourth driving chip U4, a fifth driving chip U5, a sixth driving chip U6 and a resistor capacitor matched with the fourth driving chip U4, the fifth driving chip U5 and the sixth driving chip U6; the analog quantity signal passes through an eighteenth resistor R18Input to the fourth driving chip U 43, output to a fifth driving chip U after conditioning5A time sequence latch chip; the acquisition signal is driven by a fifth driving chip U 58 feet control, 8 feetThe sequence is synchronous with the pulse of the micro-arc oxidation to obtain the time sequence segmentation of the pulse peak value and the pulse base value, and the signal is output to the chip TC275 of the main control board by 3 pins after being processed by the fourth driving chip U4.
Further, in the present invention: the human-computer interface module comprises a display unit, a parameter setting unit and a key unit, wherein the display unit is used for displaying real-time parameter values detected by the current and voltage sensors and a time-voltage curve of the processing process, and the time grid displays the time used in the processing process; the parameter setting unit is used for setting each processing parameter in the micro-arc oxidation processing process, including time, current, voltage, pulse width and pulse parameters; the key unit includes an operation mode key, a start key, and a stop key.
The invention also provides a discharge control method of the active oscillation pulse type micro-arc oxidation power supply, and the active oscillation pulse type micro-arc oxidation power supply system can realize discharge control by the method, and comprises the following steps,
and 6, overlapping the micro-arc oxidation pulse and the high-frequency pulse to form an oscillation pulse, and realizing the process control of the micro-arc oxidation discharge energy.
Has the advantages that: compared with the prior art, the invention has the beneficial effects that: according to the invention, the oscillation pulse is adopted to improve the micro-arc oxidation discharge process, and the high-frequency oscillation pulse is utilized to effectively promote the plasma discharge process, so that the appearance of the micro-arc oxidation crater is inhibited, a compact and uniform micro-arc oxidation film layer is obtained, and the performance of the film layer is improved.
Drawings
FIG. 1 is a schematic diagram of an overall structure of an active oscillation pulse type micro-arc oxidation power supply system according to the present invention;
FIG. 2 is a schematic structural diagram of a main control board;
FIG. 3 is a schematic diagram of a bi-directional pulse output module of the system of the present invention;
FIG. 4 is a schematic diagram of a filtering module in the system of the present invention;
FIG. 5 is a schematic structural diagram of a high-frequency oscillation module;
FIG. 6 is a schematic structural diagram of an IGBT driving module;
FIG. 7 is a schematic structural diagram of a pulse detection module;
FIG. 8 is a schematic illustration of a main interface of the human interface control panel;
FIG. 9 is a schematic view of the overall process of the discharge control method of the active oscillation pulse type micro-arc oxidation power supply of the present invention;
FIG. 10 is a schematic diagram of waveforms of active shaking pulses.
Detailed Description
The technical scheme of the invention is further explained in detail by combining the attached drawings:
the present invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
As shown in fig. 1, fig. 1 is a schematic diagram of an overall structure of an active oscillation pulse type micro-arc oxidation power supply system provided by the present invention, and the system includes: the device comprises a human-computer interface module, a main control panel, a bidirectional pulse output module, an IGBT driving module, a filtering module, a pulse detection module and a high-frequency oscillation module;
the human-computer interface module can be communicated with an ARM of a main control panel, and the main control panel receives the parameters input by the human-computer interface module and generates oscillation pulses. The bidirectional pulse output module, the filtering module, the IGBT driving module and the high-frequency oscillation module are respectively connected with the main control panel module, and the high-frequency pulse generated by the high-frequency oscillation module is coupled with the micro-arc oxidation pulse generated by the bidirectional pulse output module at the output end to generate oscillation pulse, so that the active oscillation of the pulse in the micro-arc oxidation process is realized. The pulse detection module is used for detecting the current and the voltage of the oscillation pulse to realize closed-loop control.
Further, the bidirectional pulse output module is used for realizing micro-arc oxidation pulse output; the IGBT driving module drives an IGBT switch in the bidirectional pulse output module to realize the respective output of pulse width and pulse width when the load waveform is output at will and the rectangular wave is output; the filtering module modulates the micro-arc oxidation pulse so as to improve the stability of the micro-arc oxidation pulse; the high-frequency oscillation module generates a high-frequency pulse and is coupled with the micro-arc oxidation pulse to form an oscillation pulse.
The structure diagram of the main control board is shown in fig. 2, and specifically, the main control board comprises a chip TC275, an I/O interface, an RS232 interface, a current acquisition ADC, a voltage acquisition ADC, a signal conditioning circuit, a high-frequency pulse generating circuit, and a bidirectional micro-arc pulse generating circuit. Wherein the I/O interface is used for external keys such as start, stop and control of the cooling pump. The RS232 interface is used for parameter interaction between the main control panel and the human-computer interface, and particularly realizes communication between the human-computer interface module and the main control panel through the USB-to-RS 232 interface. And generating a high-frequency pulse according to the received human-computer interface parameters, and generating a micro-arc pulse by a bidirectional micro-arc pulse generating circuit. The high-frequency pulse signals output by the main control board are respectively transmitted to IGBT gate poles of the bidirectional pulse output module and the high-frequency oscillation module through the IGBT driving module. The bidirectional pulse output module and the IGBT driving module respectively generate high-frequency pulses and micro-arc oxidation pulses for micro-arc treatment, the high-frequency pulses and the micro-arc oxidation pulses are coupled and output to an output end, and voltage and current are treated by the signal conditioning circuit and then are respectively transmitted to a current acquisition ADC channel and a voltage acquisition ADC channel to form closed-loop control.
Specifically, referring to the schematic diagram of fig. 3, the bidirectional micro-arc pulse output module is a full-bridge topology schematic diagram of the bidirectional micro-arc pulse output module, where the bidirectional pulse output module includes a first IGBT switching tube Q1, a second IGBT switching tube Q2, a bypass capacitor, a first reverse blocking diode D1, and a second reverse blocking diode D2, the bypass capacitor further includes a first decoupling capacitor C1, a second decoupling capacitor C2, a third decoupling capacitor C3, a fourth decoupling capacitor C4, a fifth decoupling capacitor C5, a sixth decoupling capacitor C6, a seventh decoupling capacitor C7, and an eighth decoupling capacitor C8, and the bypass capacitor can provide filtering for two ends of a power supply and prevent the input end from generating a large instantaneous voltage.
The power supply is input from a first port P1 and a second port P2, high-frequency pulses are output by a full-bridge topology formed by a first IGBT switching tube Q1 and a second IGBT switching tube Q2 through a first bypass capacitor CL, a second bypass capacitor CL1, a third bypass capacitor CL2, a fourth bypass capacitor CL3 and a second reverse cut-off diode D2, and pulse voltage is regulated and output by the alternate conduction of upper and lower bridge arms of the first IGBT switching tube Q1 and the second IGBT switching tube Q2; by adjusting duty ratios of two groups of pulse outputs of a first pin IGBT1, a third pin IGBT3, a second pin IGBT2 and a fourth pin IGBT4 and adopting a first decoupling capacitor C1, a second decoupling capacitor C2, a fifth decoupling capacitor C5, a seventh decoupling capacitor C7, a third decoupling capacitor C3, a fourth decoupling capacitor C4, a sixth decoupling capacitor C6 and an eighth decoupling capacitor C8 to filter the pulse outputs, positive and negative bidirectional current outputs are obtained. The first reverse cut-off diode D1 performs unidirectional limitation on the high-frequency coupled pulse to realize the coupling of the high-frequency and low-frequency pulses; the second reverse blocking diode D2 is a zener diode for avoiding reverse impact of the coupled high frequency pulses on the power supply.
The low-frequency micro-arc oxidation pulse is modulated by adopting a 20kHz pulse, the output waveform is a high-frequency pulse, and in order to obtain the 100-plus-1000 Hz low-frequency micro-arc oxidation pulse, the low-frequency micro-arc oxidation pulse needs to be modulated by a filtering module. Referring to fig. 4, which is a schematic diagram of a circuit structure of a filter module, the filter module includes a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a ninth capacitor C9, and a tenth capacitor C10, where the first resistor R1 is a voltage dividing resistor for limiting a voltage across the filter module circuit; the ninth capacitor C9 is a filter capacitor and can absorb high-frequency components in the input voltage; the second resistor R2, the third resistor R3, the fourth resistor R4, the fifth resistor R5 and the tenth capacitor C10 form a filter circuit, and the filter circuit carries out filter processing on micro-arc oxidation pulses to improve stability. The first resistor R1, the ninth capacitor C9 and the filter circuit are connected in parallel, and the low-frequency micro-arc oxidation pulse is input into the filter module through the first resistor R1.
Referring to fig. 5, which is a schematic diagram of a circuit structure of the high-frequency oscillation module, in this embodiment, the circuit of the high-frequency oscillation module is implemented by using a Buck topology structure, where the first chip P is a chip1And a third chip P3A fourteenth capacitor C for providing an energy source for the power supply14A fifteenth capacitor C15Sixteenth capacitor C16And a twelfth resistor R12Forming a filter circuit. The transistor IGBT chops the input signal and passes through the second inductor L2To the output; during switching of the transistor IGBT, the second chip P2And a fourth chip P4High-frequency pulses can be obtained; the transistor IGBT is directly composed of T1The pulse transformer drives the driving circuit, so that the influence of the power circuit on the driving circuit is avoided; the current detection circuit LEM is used for signal acquisition and closed-loop feedback of the controller. The voltage is divided by a seventh resistor R7, a potentiometer VR1, an eighth resistor R8 and a ninth resistor R9, and is transmitted to an acquisition circuit of the main control board by a Pin Pin2 of the potentiometer VR1 through a resistor R6.
Referring to the schematic diagram of fig. 6, which is a schematic circuit structure diagram of the IGBT driving module, the IGBT driving module includes a first driving chip U1, a second driving chip U2, an eighteenth voltage-stabilizing capacitor C18, a nineteenth voltage-stabilizing capacitor C19, a twenty-first voltage-stabilizing capacitor C21, a twenty-second voltage-stabilizing capacitor C22, a twenty-third voltage-stabilizing capacitor C23, a fourteenth filter resistor R14, and a twentieth voltage-stabilizing capacitor C20.
Pulse input signals generated by the main control board are input to a Pin2 of the first driving chip through a fourteenth filter resistor R14 and a twentieth voltage-stabilizing capacitor C20 filter circuit, and the Pin2 and the Pin3 of the first driving chip drive the GS end of the IGBT; each IGBT drive is isolated and powered by the second drive chip U2, and mutual interference of independent paths in the drive process is avoided. The eighteenth voltage-stabilizing capacitor C18, the nineteenth voltage-stabilizing capacitor C19, the twenty-first voltage-stabilizing capacitor C21, the twenty-second voltage-stabilizing capacitor C22 and the twenty-third voltage-stabilizing capacitor C23 are used for maintaining the power supply stability of the first driving chip U1 and the second driving chip U2.
Preferably, the MIC4452 chip is used as the first driver chip U1, and the 15242 chip is used as the second driver chip U2.
In order to realize closed-loop current or voltage acquisition, the current and voltage values of the pulse are acquired in a time-sharing sequence, and the schematic diagram of fig. 7 is a circuit structure schematic diagram of the pulse detection module. The pulse detection module comprises a fourth driving chip U4, a fifth driving chip U5, a sixth driving chip U6 and a resistor capacitor matched with the fourth driving chip U4, the fifth driving chip U5 and the sixth driving chip U6. The analog quantity signal passes through an eighteenth resistor R18Input to the fourth driving chip U 43, output to a fifth driving chip U after conditioning5A time sequence latch chip; the acquisition signal is driven by a fifth driving chip U5The 8-pin control, the 8-pin time sequence and the micro-arc oxidation pulse are synchronized to obtain the time sequence division of the pulse peak value and the pulse base value, and the signal is processed by a fourth driving chip U4 and then is output to a chip TC275 of the main control board through a 3 pin.
Preferably, the fourth driving chip U4, the fifth driving chip U5, and the sixth driving chip U6 are all operational amplifiers, the fourth driving chip U4 may use an LF357 chip, the fifth driving chip U5 may use an LF358 chip, and the sixth driving chip U6 may use an LF353 chip.
Further, the human-computer interface module comprises a display unit, a parameter setting unit and a key unit, a display interface schematic diagram of the human-computer interface module is shown in fig. 8, the display unit is used for displaying real-time parameter values detected by the current and voltage sensors and a time-voltage curve of the processing process, and the time grid displays the time used by the processing process; the parameter setting unit is used for setting each processing parameter in the micro-arc oxidation processing process, including time, current, voltage, pulse width and pulse parameters; the key unit comprises a working mode key, a start key and a stop key, and a user can operate the key unit.
Referring to the schematic diagram of fig. 9, which is an overall flow diagram of the method for controlling the micro-arc oxidation power supply in the active oscillation pulse discharge process according to the present invention, the system can be implemented by the method, and the method specifically includes the following steps:
and 6, overlapping the micro-arc oxidation pulse and the high-frequency pulse to form an oscillation pulse, and realizing the process control of the micro-arc oxidation discharge energy.
In order to verify the beneficial effect of the invention in practical application, the following simulation experiment is carried out:
increasing the discharge state of the MAO discharge process before and after the high-frequency pulse, wherein the interelectrode voltage reaches 390V arcing voltage, the dense spark discharge appears on the surface of the sample, the sample is in a spark anodic oxidation stage, the depth of the spark discharge is shallow, the discharge enters a micro-arc oxidation stage within 5-20 min, and bubbles gradually increase along with the increase of the volume of the spark and are ejected from the discharge position; the volume of the spark is increased and the density is reduced at 30 min. The high frequency pulses promote an increase in spark density. The MAO discharge period is about 250 mus, the high-frequency pulse period is 100 mus, the short-period pulse induces the spark discharge to be completed in a short time by the short pulse energy of the short-period pulse, and the tiny spark is generated; the surface porosity of the membrane layer obtained by high-frequency pulse coupling is reduced, and the compactness of the membrane layer is obviously improved.
Further, the high and low frequencies couple the square wave pulse waveform, as shown in fig. 10. The high-frequency pulse coupling period is short, so that the single spark discharge time is shortened, and the discharge frequency is increased. The coupling of the high-frequency pulse increases the average amplitude of the processing voltage in the micro-arc oxidation process, improves the energy in the micro-arc oxidation process, and improves the micro-morphology and the performance of the film layer.
The invention effectively solves the problem of extremely low efficiency of the conventional micro-arc oxidation power supply in the process of depositing the nano particles, and the problems of low nano particle deposition efficiency and poor film layer compactness can be effectively solved by coupling the high-frequency pulse and the micro-arc oxidation pulse and promoting the nano particles to participate in the spark discharge of the micro-arc oxidation through energy oscillation. Compared with the film layer obtained by singly carrying out micro-arc oxidation treatment, the film layer is compact and uniform.
It should be noted that the above-mentioned examples only represent some embodiments of the present invention, and the description thereof should not be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, various modifications can be made without departing from the spirit of the present invention, and these modifications should fall within the scope of the present invention.
Claims (9)
1. An initiative oscillation pulse type micro-arc oxidation power supply system is characterized in that: the device comprises a human-computer interface module, a main control panel, a bidirectional pulse output module, an IGBT driving module, a filtering module, a pulse detection module and a high-frequency oscillation module;
the human-computer interface module can be communicated with an ARM of a main control panel, and the main control panel receives the parameters input by the human-computer interface module and generates oscillation pulses; the bidirectional pulse output module, the filtering module, the IGBT driving module and the high-frequency oscillation module are respectively connected with the main control panel module, and the high-frequency pulse generated by the high-frequency oscillation module is coupled with the micro-arc oxidation pulse generated by the bidirectional pulse output module at the output end to generate oscillation pulse, so that the active oscillation of the pulse in the micro-arc oxidation process is realized; the pulse detection module is used for detecting the current and the voltage of the oscillation pulse to realize closed-loop control.
2. The active oscillation pulse type micro-arc oxidation power supply system according to claim 1, wherein: the main control board comprises a chip TC275, an I/O interface, an RS232 interface, a current acquisition ADC, a voltage acquisition ADC, a signal conditioning circuit, a high-frequency pulse generating circuit and a bidirectional micro-arc pulse generating circuit;
wherein, the I/O interface is used for external keys such as starting, stopping and controlling the cooling pump; the RS232 interface is used for parameter interaction between the main control panel and the human-computer interface; the bidirectional micro-arc pulse generating circuit can generate micro-arc pulses; the high-frequency pulse signals output by the main control board are respectively transmitted to IGBT gate poles of the bidirectional pulse output module and the high-frequency oscillation module through the IGBT driving module; the bidirectional pulse output module and the IGBT driving module respectively generate high-frequency pulses and micro-arc oxidation pulses for micro-arc treatment, the high-frequency pulses and the micro-arc oxidation pulses are coupled and output to an output end, and voltage and current are treated by the signal conditioning circuit and then are respectively transmitted to a current acquisition ADC channel and a voltage acquisition ADC channel to form closed-loop control.
3. The active oscillating pulse type micro-arc oxidation power supply system according to claim 1 or 2, wherein: the bidirectional pulse output module comprises a first IGBT switch tube Q1, a second GBT switch tube Q2, a bypass capacitor, a first reverse cut-off diode D1 and a second reverse cut-off diode D2, the bypass capacitor further comprises a first decoupling capacitor C1, a second decoupling capacitor C2, a third decoupling capacitor C3, a fourth decoupling capacitor C4, a fifth decoupling capacitor C5, a sixth decoupling capacitor C6, a seventh decoupling capacitor C7 and an eighth decoupling capacitor C8, and the bypass capacitor can provide filtering for two ends of a power supply and prevent large instantaneous voltage from being generated at an input end.
4. The active oscillation pulse type micro-arc oxidation power supply system according to claim 3, wherein: the filter module comprises a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a ninth capacitor C9 and a tenth capacitor C10, wherein the first resistor R1 is a voltage dividing resistor and is used for limiting the voltage at two ends of the filter module circuit; the ninth capacitor C9 is a filter capacitor and can absorb high-frequency components in the input voltage; the second resistor R2, the third resistor R3, the fourth resistor R4, the fifth resistor R5 and the tenth capacitor C10 form a filter circuit, and the filter circuit performs filtering processing on micro-arc oxidation pulses to improve stability; the first resistor R1, the ninth capacitor C9 and the filter circuit are connected in parallel, and the low-frequency micro-arc oxidation pulse is input into the filter module through the first resistor R1.
5. The active oscillating pulse type micro-arc oxidation power supply system according to claim 4, wherein: the circuit of the high-frequency oscillation module is realized by adopting a Buck topological structure, wherein a first chip P1And a third chip P3A fourteenth capacitor C for providing an energy source for the power supply14A fifteenth capacitor C15Sixteenth capacitor C16And a twelfth resistor R12Forming a filter circuit.
6. The active oscillating pulse type micro-arc oxidation power supply system according to claim 4 or 5, wherein: the IGBT driving module comprises a first driving chip U1, a second driving chip U2, an eighteenth voltage-stabilizing capacitor C18, a nineteenth voltage-stabilizing capacitor C19, a twenty-first voltage-stabilizing capacitor C21, a twenty-second voltage-stabilizing capacitor C22, a twenty-third voltage-stabilizing capacitor C23, a fourteenth filter resistor R14 and a twentieth voltage-stabilizing capacitor C20;
pulse input signals generated by the main control board are input to a Pin2 of the first driving chip through a fourteenth filter resistor R14 and a twentieth voltage-stabilizing capacitor C20 filter circuit, and the Pin2 and the Pin3 of the first driving chip drive the GS end of the IGBT; each IGBT drive is isolated and powered by a second drive chip U2, so that mutual interference of independent paths in the drive process is avoided; the eighteenth voltage-stabilizing capacitor C18, the nineteenth voltage-stabilizing capacitor C19, the twenty-first voltage-stabilizing capacitor C21, the twenty-second voltage-stabilizing capacitor C22 and the twenty-third voltage-stabilizing capacitor C23 are used for maintaining the power supply stability of the first driving chip U1 and the second driving chip U2.
7. The active oscillation pulse type micro-arc oxidation power supply system according to claim 6, wherein: the pulse detection module comprises a fourth driving chip U4, a fifth driving chip U5, a sixth driving chip U6 and a resistor capacitor matched with the fourth driving chip U4, the fifth driving chip U5 and the sixth driving chip U6; the analog quantity signal passes through an eighteenth resistor R18Input to the fourth driving chip U43, output to a fifth driving chip U after conditioning5A time sequence latch chip; the acquisition signal is driven by a fifth driving chip U5The 8-pin control, the 8-pin time sequence and the micro-arc oxidation pulse are synchronized to obtain the time sequence division of the pulse peak value and the pulse base value, and the signal is processed by a fourth driving chip U4 and then is output to a chip TC275 of the main control board through a 3 pin.
8. The active oscillation pulse type micro-arc oxidation power supply system according to claim 6, wherein: the human-computer interface module comprises a display unit, a parameter setting unit and a key unit, wherein the display unit is used for displaying real-time parameter values detected by the current and voltage sensors and a time-voltage curve of the processing process, and the time grid displays the time used in the processing process; the parameter setting unit is used for setting each processing parameter in the micro-arc oxidation processing process, including time, current, voltage, pulse width and pulse parameters; the key unit includes an operation mode key, a start key, and a stop key.
9. An active oscillation pulse type micro-arc oxidation power supply discharge control method is characterized in that: comprises the following steps of (a) carrying out,
step 1, initializing each module in a system, and setting a mode through a human-computer interface module;
step 2, waiting for an external starting processing command and starting processing;
step 3, outputting the micro-arc oxidation pulse through a bidirectional pulse output module, and processing the micro-arc oxidation pulse by adopting a filtering module to improve the stability;
step 4, acquiring the output micro-arc oxidation pulse through a pulse detection module to realize closed-loop control;
step 5, generating high-frequency pulses by using a high-frequency oscillation module, and acquiring and feeding back signals by using a current detection circuit;
and 6, overlapping the micro-arc oxidation pulse and the high-frequency pulse to form an oscillation pulse, and realizing the process control of the micro-arc oxidation discharge energy.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103586564A (en) * | 2013-10-28 | 2014-02-19 | 广东电网公司电力科学研究院 | MIG welding power supply system based on STM32 |
| CN106877730A (en) * | 2015-12-13 | 2017-06-20 | 田佳聪 | A kind of differential arc oxidation pulse power |
| CN110064817A (en) * | 2019-05-29 | 2019-07-30 | 华南理工大学 | Fast frequency pulse TIG welding connects power supply low-and high-frequency energy conversion and compound circuit |
| CN111074318A (en) * | 2019-11-13 | 2020-04-28 | 南京工业大学 | Electrophoresis-micro arc oxidation synchronous processing power supply based on grouping pulse |
| CN111975178A (en) * | 2020-07-17 | 2020-11-24 | 华南理工大学 | Welding pool balanced oscillation pulse deep-melting lockhole TIG welding system and welding method thereof |
| CN113084310A (en) * | 2021-05-18 | 2021-07-09 | 南京工业大学 | 250kHz arc welding power supply chopper and control method thereof |
-
2021
- 2021-10-22 CN CN202111230821.0A patent/CN113890408A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103586564A (en) * | 2013-10-28 | 2014-02-19 | 广东电网公司电力科学研究院 | MIG welding power supply system based on STM32 |
| CN106877730A (en) * | 2015-12-13 | 2017-06-20 | 田佳聪 | A kind of differential arc oxidation pulse power |
| CN110064817A (en) * | 2019-05-29 | 2019-07-30 | 华南理工大学 | Fast frequency pulse TIG welding connects power supply low-and high-frequency energy conversion and compound circuit |
| CN111074318A (en) * | 2019-11-13 | 2020-04-28 | 南京工业大学 | Electrophoresis-micro arc oxidation synchronous processing power supply based on grouping pulse |
| CN111975178A (en) * | 2020-07-17 | 2020-11-24 | 华南理工大学 | Welding pool balanced oscillation pulse deep-melting lockhole TIG welding system and welding method thereof |
| CN113084310A (en) * | 2021-05-18 | 2021-07-09 | 南京工业大学 | 250kHz arc welding power supply chopper and control method thereof |
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