Current output control method, device, apparatus, and storage medium
By adjusting the AC current waveform of the welding power source, the clipping problem caused by the welding current exceeding the maximum current value was solved, thus achieving stability in welding effect and accuracy in current output.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- PANASONIC WELDING SYST TANGSHAN
- Filing Date
- 2023-11-20
- Publication Date
- 2026-06-19
Smart Images
Figure CN117300300B_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of welding technology, and in particular to a current output control method, device, equipment and storage medium. Background Technology
[0002] In welding scenarios, users can employ different current intensities and waveforms depending on the specific welding requirements. Typically, different welding machine specifications allow for different maximum output current values. If the maximum output current exceeds the welding machine's maximum allowable current, clipping will occur. Therefore, to avoid clipping, the waveform of the welding machine's output AC current needs to be flexibly adjusted according to the actual welding requirements. Summary of the Invention
[0003] To avoid clipping, this application provides a current output control method, apparatus, device, and storage medium.
[0004] In a first aspect, embodiments of this application provide a current output control method for AC welding, comprising: acquiring a set value of the AC current output by a welding power source, and a set waveform coefficient of the waveform corresponding to the AC current; acquiring a first waveform coefficient; the first waveform coefficient being the minimum waveform coefficient corresponding to the set value; the maximum current value corresponding to the AC current output by the welding power source with the set value and the first waveform coefficient being equal to the maximum current allowed to be output by the welding power source; determining a target waveform coefficient based on the set waveform coefficient and the first waveform coefficient; and controlling the welding power source to output AC current with the set value and the target waveform coefficient.
[0005] In one possible implementation, determining the target waveform coefficient based on the set waveform coefficient and the first waveform coefficient includes: if the first waveform coefficient is greater than the set waveform coefficient, determining the first waveform coefficient as the target waveform coefficient; or, if the first waveform coefficient is less than or equal to the set waveform coefficient, determining the set waveform coefficient as the target waveform coefficient.
[0006] In one possible implementation, obtaining the first waveform coefficient includes: controlling the welding power supply to output an alternating current at the set value and continuously changing the magnitude of the waveform coefficient; if the maximum current value of the output alternating current is the maximum current allowed to be output by the welding power supply and the corresponding effective value matches the set value, then determining the currently used waveform coefficient as the first waveform coefficient.
[0007] In one possible implementation, obtaining the first waveform coefficient includes: reading the minimum waveform coefficient corresponding to the set value from a pre-stored first correspondence as the first waveform coefficient; the first correspondence includes multiple different set values set for the output AC current of the welding power supply and the minimum waveform coefficient corresponding to each set value, and the minimum waveform coefficients corresponding to different set values are different.
[0008] In one possible implementation, the method further includes: controlling the welding power source to output current with a first set value and a second waveform coefficient; the first set value is any one of a plurality of set values in the first correspondence; if the maximum current value of the output AC current is the maximum current allowed to be output by the welding power source and the corresponding effective value matches the first set value, the second waveform coefficient is determined to be the minimum waveform coefficient corresponding to the first set value.
[0009] In one possible implementation, the method further includes: if the maximum current value of the output AC current is different from the maximum current allowed to be output by the welding power source, and / or the corresponding effective value does not match the first set value, sequentially controlling the welding power source to output AC current with the first set value and a waveform coefficient different from the second waveform coefficient, until the maximum current value of the output AC current is the maximum current allowed to be output by the welding power source and the corresponding effective value matches the first set value, and determining that the currently used waveform coefficient is the minimum waveform coefficient corresponding to the first set value.
[0010] Secondly, embodiments of this application provide a current output control device for AC welding, comprising: a first acquisition module, configured to acquire a set value of the AC current output by a welding power source, and a set waveform coefficient of the waveform corresponding to the AC current; a second acquisition module, configured to acquire a first waveform coefficient; the first waveform coefficient being the minimum waveform coefficient corresponding to the set value; the maximum current value corresponding to the welding power source outputting AC current with the set value and the first waveform coefficient being equal to the maximum current allowed to be output by the welding power source; a determination module, configured to determine a target waveform coefficient based on the set waveform coefficient and the first waveform coefficient; and a control module, configured to control the welding power source to output AC current with the set value and the target waveform coefficient.
[0011] In one possible implementation, the determining module determines a target waveform coefficient based on the set waveform coefficient and the first waveform coefficient, for: determining the first waveform coefficient as the target waveform coefficient if the first waveform coefficient is greater than the set waveform coefficient; or determining the set waveform coefficient as the target waveform coefficient if the first waveform coefficient is less than or equal to the set waveform coefficient.
[0012] In one possible implementation, the control module is used to: control the welding power supply to output an alternating current at the set value and continuously change the magnitude of the waveform coefficient; if the maximum current value of the output alternating current is the maximum current allowed to be output by the welding power supply and the corresponding effective value matches the set value, the second acquisition module is used to acquire the currently used waveform coefficient as the first waveform coefficient.
[0013] In one possible implementation, the second acquisition module acquires the first waveform coefficient, which is used to: read the minimum waveform coefficient corresponding to the set value from a pre-stored first correspondence as the first waveform coefficient; the first correspondence includes multiple different set values for the output AC current of the welding power supply and the minimum waveform coefficient corresponding to each set value, and the minimum waveform coefficients corresponding to different set values are different.
[0014] In one possible implementation, the control module is used to: control the welding power supply to output current with a first set value and a second waveform coefficient; the first set value is any one of a plurality of set values in the first correspondence; if the maximum current value of the output AC current is the maximum current allowed to be output by the welding power supply and the corresponding effective value matches the first set value, the determining module is used to determine that the second waveform coefficient is the minimum waveform coefficient corresponding to the first set value.
[0015] In one possible implementation, if the maximum current value of the output AC current is different from the maximum current allowed to be output by the welding power supply, and / or the corresponding effective value does not match the first set value, the control module is used to sequentially control the welding power supply to output AC current with the first set value and a waveform coefficient different from the second waveform coefficient, until the maximum current value of the output AC current is the maximum current allowed to be output by the welding power supply and the corresponding effective value matches the first set value, the determining module is used to determine that the currently used waveform coefficient is the minimum waveform coefficient corresponding to the first set value.
[0016] Thirdly, embodiments of this application provide a computer device, including a processor and a memory, wherein the memory stores computer programs / instructions, and the processor is used to execute the computer programs / instructions to implement the current output control method for AC welding.
[0017] Fourthly, embodiments of this application provide a storage medium storing a computer program / instruction, which, when executed by a processor, is used to implement the current output control method for AC welding.
[0018] In summary, the AC welding current output control method, apparatus, device, and storage medium provided in this application can control the waveform of the AC current output by the welding power source based on a set value and a set waveform coefficient. For any set value, by modifying the corresponding set waveform coefficient to adjust the actual waveform of the AC current output by the welding power source, the maximum current value of the AC current output by the welding power source can be controlled within the maximum allowable output current of the welding power source, and the effective value of the AC current output by the welding power source can be guaranteed to match the set value. In this way, clipping can be avoided, ensuring welding quality. Attached Figure Description
[0019] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0020] Figure 1 This is a schematic diagram comparing different waveforms provided in an embodiment of this application.
[0021] Figure 2a This is a flowchart of a current output control method provided in an embodiment of this application.
[0022] Figure 2b This is another schematic diagram comparing different waveforms provided for an embodiment of this application.
[0023] Figure 2c This is a schematic diagram of a waveform adjustment process provided in an embodiment of this application.
[0024] Figure 2d This is another schematic diagram comparing different waveforms provided for an embodiment of this application.
[0025] Figure 2e This is another schematic diagram comparing different waveforms provided for an embodiment of this application.
[0026] Figure 2f This is a schematic diagram of another waveform adjustment process provided in an embodiment of this application.
[0027] Figure 2g This is another schematic diagram comparing different waveforms provided for an embodiment of this application.
[0028] Figure 2h This is a schematic diagram of another waveform adjustment process provided in an embodiment of this application.
[0029] Figure 3a This is a structural block diagram of a current output control device provided in an embodiment of this application.
[0030] Figure 3b This is a structural block diagram of another current output control device provided in an embodiment of this application.
[0031] Figure 4 This is a structural block diagram of a computer device provided in an embodiment of this application. Detailed Implementation
[0032] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. Through these descriptions, the features and advantages of the present application will become clearer and more apparent.
[0033] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments. Although various aspects of embodiments are shown in the accompanying drawings, the drawings are not necessarily drawn to scale unless specifically indicated otherwise.
[0034] Furthermore, the technical features involved in the different embodiments of this application described below can be combined with each other as long as they do not conflict with each other.
[0035] In AC welding scenarios, different AC current waveforms can be used to output AC current for different welding processes to meet varying welding requirements. For example, for welding scenarios requiring a concentrated arc, a rectangular waveform can be used to output the AC current, resulting in a more concentrated arc; conversely, for welding scenarios requiring a divergent arc, a sine wave or near-sine wave waveform can be used to output the AC current, resulting in a more divergent arc. Regardless of the method used to control the AC current output, the AC current output by the welding power source and the waveform used must be preset so that the welding power source outputs the AC current according to the corresponding preset values and waveforms.
[0036] However, different specifications of welding power supplies allow different maximum output currents. If the set value of the welding power supply's AC output current is too high, the maximum current value may exceed the maximum allowable output current. In this case, clipping will occur, affecting the welding effect. For example, for a welding machine with a maximum allowable output current of 550A, if the M-waveform is used to control the AC output current, the effective value when the maximum AC output current reaches 550A is 400A. If the set value of the welding power supply's AC output current is greater than 400A, the maximum current value will exceed 550A, resulting in clipping. Alternatively, if the set value of the welding power supply's AC output current is not greater than 400A, but the set waveform is different from the M-waveform, such as the W-waveform, when the welding power supply outputs an equivalent 400A AC current with the W-waveform, the maximum current value will exceed 550A, also resulting in clipping. When clipping occurs, the welding power supply will only output the maximum allowable current. For example, in the example above, when the maximum AC current output by the welding power supply is greater than 550A, it will only output 550A as the maximum current. This will cause the effective value of the output AC current to be inconsistent with the set value, affecting the welding effect.
[0037] Therefore, in order to solve the problem of clipping caused by improper setting value or waveform of the output AC current of the welding power source, one or more embodiments of this application provide a current output control method, device, equipment and storage medium for AC welding, which is used to flexibly adjust the actual waveform of the output AC current of the welding power source according to the set value or waveform of the output AC current of the welding power source, so as to control the maximum current value of the output AC current of the welding power source within the maximum current allowed to be output by the welding power source while ensuring that the effective value of the output AC current of the welding power source is the same as or close to the set value, thus ensuring that clipping does not occur and achieving the expected welding effect.
[0038] For ease of description, one or more embodiments of this application represent the waveform corresponding to the output current of the welding power source using waveform coefficients. Optionally, different waveform coefficients correspond to different waveform shapes. It should be noted that the embodiments of this application do not limit the specific form of the waveform coefficients or the correspondence between the waveform coefficients and the waveform shapes; these can be determined according to specific requirements.
[0039] Assuming an approximate sine wave waveform as an example, one or more embodiments of this application specify that the waveform coefficients are real numbers; the larger the waveform coefficients, the "shorter and wider" the waveform shape (e.g., ...). Figure 1 In waveform A), the smaller the waveform coefficient, the "taller and thinner" the waveform shape (e.g., waveform A). Figure 1Waveform B in the diagram can be understood as follows: when the maximum current value of the alternating current is the same, the larger the waveform coefficient, the larger the area enclosed by the waveform and the time axis. Of course, in practical applications, this is not the only limitation. Other forms of waveform coefficients and the correspondence between waveform coefficients and waveform shapes are all considered as long as they are applicable to the current output control method for AC welding provided in the embodiments of this application. The specific method for determining the waveform coefficient can also be determined according to actual needs and is not limited here.
[0040] The following description, in conjunction with the accompanying drawings, describes one or more embodiments of the AC welding current output control method, apparatus, device, and storage medium provided in this application.
[0041] Figure 2a A flowchart of an AC welding current output control method provided in one or more embodiments of this application is shown below. Figure 2a As shown, the method includes:
[0042] S101. Obtain the set value of the AC current output by the welding power source and the set waveform coefficient of the corresponding AC current waveform.
[0043] S102. Obtain the first waveform coefficient; the first waveform coefficient is the minimum waveform coefficient corresponding to the set value; when the welding power supply outputs AC current with the set value and the first waveform coefficient, the corresponding maximum current value is equal to the maximum current allowed to be output by the welding power supply.
[0044] S103. Determine the target waveform coefficient based on the set waveform coefficient and the first waveform coefficient;
[0045] S104. Control the welding power supply to output AC current with set value and target waveform coefficient.
[0046] For any type of welding machine, the maximum current value of the welding power supply output AC current will vary depending on the set value and set waveform coefficient of the welding power supply output AC current. Therefore, when the above method is applied to AC welding scenarios, the welding machine can obtain the set value of the welding power supply output AC current and the set waveform coefficient of the corresponding AC current waveform. The set value is used to measure whether the actual effective value of the welding power supply output AC current meets the welding requirements, and the set waveform coefficient is used to represent the shape of the waveform corresponding to the welding power supply output AC current. The correspondence between the waveform coefficient and the waveform shape can be found in the above explanation, and will not be repeated here.
[0047] Furthermore, the welding machine can also acquire a first waveform coefficient, which is the minimum waveform coefficient corresponding to the set value. When the welding power source outputs AC current with the set value and the first waveform coefficient, the maximum current value of the AC current output by the welding power source is equal to the maximum current allowed to be output by the welding power source. That is, when the effective value of the AC current output by the welding power source matches the set value, and the maximum current value of the AC current output by the welding power source is the same as the maximum current allowed to be output, the corresponding waveform coefficient is the first waveform coefficient. It should be noted that the effective value of the AC current output by the welding power source matching the set value means that the difference between the effective value and the set value is within the allowable preset difference range. The specific size of the preset difference is not limited in this embodiment and can be determined according to actual needs.
[0048] Furthermore, to ensure that the welding power supply does not produce clipping when outputting AC current according to the set value, it is necessary to determine whether the set waveform coefficient of the welding power supply's output AC current meets the requirements. Optionally, a target waveform coefficient that meets the requirements can be determined based on the set waveform coefficient and the first waveform coefficient. This target waveform coefficient can ensure that the maximum current value of the welding power supply outputting AC current with the set value and the target waveform coefficient does not exceed the maximum allowable output current of the welding power supply. Based on this, the welding machine can control the welding power supply to output AC current with the set value and the target waveform coefficient, thus avoiding clipping.
[0049] In one alternative approach, when the welding machine determines the target waveform coefficient based on the set waveform coefficient and the first waveform coefficient, if the first waveform coefficient is greater than the set waveform coefficient, it indicates that the first waveform corresponding to the AC current output by the welding power source with the set value and the first waveform coefficient is "shorter and wider" than the second waveform corresponding to the AC current output by the welding power source with the set value and the set waveform coefficient. Since the maximum current value corresponding to the first waveform is equal to the maximum current allowed to be output by the welding power source, if the welding power source outputs AC current according to the second waveform, clipping will occur. Therefore, in this case, the first waveform coefficient can be determined as the target waveform coefficient. Alternatively, if the first waveform coefficient is less than or equal to the set waveform coefficient, it indicates that the second waveform corresponding to the AC current output by the welding power source with the set value and the set waveform coefficient is "shorter and wider" than the first waveform corresponding to the AC current output by the welding power source with the set value and the first waveform coefficient. Since the maximum current value corresponding to the first waveform is equal to the maximum current allowed to be output by the welding power source, if the welding power source outputs AC current according to the second waveform, clipping will not occur. Therefore, in this case, the set waveform coefficient can be determined as the target waveform coefficient.
[0050] It should be noted that the embodiments of this application do not limit the method by which the welding machine obtains the first waveform coefficient. Optionally, the welding machine can obtain the first waveform coefficient by direct determination or by obtaining the first waveform coefficient from a set of preset waveform coefficients. The specific method can be determined according to actual needs.
[0051] In one alternative approach, the welding machine obtains the first waveform coefficient using a directly determined method. For example, the welding machine can control the welding power supply to output AC current at a set value, while simultaneously continuously changing the magnitude of the waveform coefficient and determining the maximum current value and effective value of the AC current output by the welding power supply. If the maximum current value of the AC current output by the welding power supply is the maximum current allowed to be output by the welding power supply and the corresponding effective value matches the set value, then the currently used waveform coefficient is determined to be the first waveform coefficient.
[0052] In another alternative approach, the welding machine obtains a first waveform coefficient from a set of preset waveform coefficients. For example, the welding power source can output AC current according to different set values and waveform coefficients, and establish a first correspondence as shown in Table A for each set value and its corresponding minimum waveform coefficient. This first correspondence includes multiple distinct set values for the welding power source's output AC current and the minimum waveform coefficient corresponding to each set value, with different minimum waveform coefficients for different set values. For any given set value, the maximum current value of the AC current output by the welding power source with that set value and its corresponding minimum waveform coefficient is equal to the maximum current allowed to be output by the welding power source. Based on this, when obtaining the first waveform coefficient, the welding machine can determine the minimum waveform coefficient corresponding to the obtained set value from the pre-established first correspondence in Table A. For example, if the obtained set value is In in Table A, and its corresponding minimum waveform coefficient is Kn, then Kn is used as the first waveform coefficient.
[0053] Table A
[0054] Minimum waveform coefficient K1 K2 … Kn … K(n+m) … Kmax Setting value I1 I2 … In … I(n+m) … Imax
[0055] Alternatively, when constructing the first correspondence corresponding to Table A above, a "stepwise probing" method can be adopted. For example, the welding machine can control the welding power supply to output AC current with a first set value and a second waveform coefficient, wherein the first set value is any one of the multiple set values in the first correspondence. Based on this, if the maximum current value of the AC current output by the welding power supply is the maximum current allowed to be output by the welding power supply and the corresponding effective value matches the first set value, then the second waveform coefficient is determined to be the minimum waveform coefficient corresponding to the first set value.
[0056] Optionally, if the maximum current value of the AC current output by the welding power source differs from the maximum allowable current output by the welding power source, and / or the effective value of the AC current output by the welding power source does not match the first set value, then the welding power source is sequentially controlled to output AC current with the first set value and a waveform coefficient different from the second waveform coefficient. Optionally, when selecting a waveform coefficient different from the second waveform coefficient, the waveform coefficient can be sequentially increased or decreased according to a preset step size until the maximum current value of the AC current output by the welding power source is the maximum allowable current output by the welding power source and the corresponding effective value matches the first set value, thereby determining that the currently used waveform coefficient is the minimum waveform coefficient corresponding to the first set value.
[0057] It should be noted that the above example illustrates the method of determining the target waveform coefficient based on the set value of the welding power source's output AC current and the set waveform coefficient, using the adjustment of the actual waveform of the welding power source's output AC current as an example. Based on the same implementation principle, other forms can also be used in practical applications. For example, the actual waveform of the welding power source's output AC current can be adjusted based on the set value of the welding power source's output AC current and the set waveform. In this case, a second correspondence relationship as shown in Table B can be established in advance. The second correspondence relationship includes multiple different set values for the welding power source's output AC current and the set waveform corresponding to each set value, with different shapes for the preset waveforms corresponding to different set values. For any set value, the maximum current value of the welding power source's output AC current with that set value and its corresponding set waveform is equal to the maximum current allowed to be output by the welding power source.
[0058] Based on this, taking the above example again (the maximum allowable output current of the welding power source is 550A, the M waveform is used to control the output AC current of the welding power source, and when the maximum current value of the output AC current of the welding power source reaches 550A, the corresponding effective value is 400A), the welding machine can obtain the set value and set waveform of the output AC current of the welding power source, and compare the set value with 400A and the set waveform with the M waveform respectively. In order to avoid clipping, if it is determined that the set value is greater than 400A or the set waveform is "thinner and taller" than the M waveform, the actual waveform of the output AC current of the welding power source is adjusted.
[0059] Table B
[0060] Set waveform M1 M2 … Mn … M(n+m) … Mmax Setting value I1 I2 … In … I(n+m) … Imax
[0061] It should be noted that the specific method for determining the correspondence between each set value and the set waveform in Table B is not limited in the embodiments of this application. Optionally, the welding machine can control the welding power supply to output AC current at any set value, while continuously changing the waveform and determining the maximum current value and effective value of the AC current output by the welding power supply. If the maximum current value of the AC current output by the welding power supply is the maximum current allowed to be output by the welding power supply and the corresponding effective value is the currently used set value, then the currently used waveform is determined to be the set waveform corresponding to the currently used set value. Of course, the specific form is not limited to this.
[0062] Based on the above description, the following description, in conjunction with the accompanying drawings, exemplarily illustrates the process of adjusting the actual waveform of the AC current output by the welding power supply according to an embodiment of this application.
[0063] Assuming the maximum allowable output current of the welding power source is 550A, and the set value of the output AC current of the welding power source is I1 and the set waveform coefficient is K1, the waveform corresponding to the output AC current of the welding power source is waveform M.
[0064] In one scenario, the waveform coefficient K1 of the welding power supply output AC current remains unchanged, but the set value of the welding power supply output AC current is increased from I1 to I2. Figure 2b This example shows a comparison of the waveforms of the welding power supply's output AC current before and after the AC current setting value was changed. Figure 2b As shown, since the waveform coefficient K1 remains unchanged, the waveform of the AC current output by the welding power supply remains waveform M before and after the change in the AC current setting. However, the increase in the AC current setting causes the maximum current value of the AC current output by the welding power supply, based on the increased setting value I2 and the waveform coefficient K1, to exceed the maximum allowable output current of 550A, resulting in clipping. To resolve the clipping issue, the actual waveform of the AC current output by the welding power supply needs to be adjusted by adjusting the waveform coefficient. This ensures that the maximum current value corresponding to the actual waveform of the AC current output by the welding power supply does not exceed the maximum allowable output current, and that the corresponding effective value matches the setting value I2. In this way, the clipping problem can be solved while maintaining the welding effect.
[0065] For example, increasing the waveform coefficient from K1 to K2 changes the waveform from M to H. The adjustment process can be found in [reference needed]. Figure 2c After adjusting the waveform coefficient, the waveform of the AC current output by the welding power source according to the set value I2 and the set waveform coefficient K2 can be compared with the waveform of the AC current output by the welding power source according to the set value I1 and the set waveform coefficient K1. (See [reference needed]) Figure 2d ,like Figure 2dAs shown, by increasing the waveform coefficient, the maximum current value of the AC current output by the welding power supply does not exceed 550A and the corresponding effective value matches the set value I2. This not only solves the clipping problem but also does not affect the welding effect.
[0066] In another scenario, the set value I1 of the welding power supply output AC current remains unchanged, but the set waveform coefficient is reduced from K1 to K3. Figure 2e This diagram illustrates the waveform comparison of the welding power supply output AC current before and after changing the set waveform coefficient in this example. Waveform M represents the waveform before the change in the set waveform coefficient, and waveform R represents the waveform after the change in the set waveform coefficient. Figure 2e As shown, since the set value I1 of the welding power supply's output AC current remains unchanged, but the set waveform coefficient of the welding power supply's output AC current decreases, the waveform of the output AC current becomes "thinner and taller." Therefore, the maximum current value of the output AC current of the welding power supply, based on the reduced set waveform coefficient K3 and the set value I1, will exceed the maximum allowable output current of the welding power supply (550A), resulting in clipping. To solve the clipping problem, it is necessary to adjust the actual waveform of the welding power supply's output AC current by adjusting the set waveform coefficient, so that the maximum current value of the actual waveform of the welding power supply's output AC current does not exceed the maximum allowable output current of the welding power supply, and the corresponding effective value matches the set value I1.
[0067] For example, by increasing the set waveform coefficient from K3 to K1, the waveform of the AC current output by the welding power source will be adjusted from waveform R to waveform M based on the set value I1 and the adjusted set waveform coefficient K1. The adjustment process can be found in [reference needed]. Figure 2f After adjusting the waveform coefficient, the waveform of the AC current output by the welding power supply is similar to... Figure 2e The waveform M is the same. In this way, by increasing the waveform coefficient, the maximum current value of the welding power supply output AC current does not exceed 550A and the corresponding effective value matches the set value I1, thus preventing clipping.
[0068] It should be noted that the waveform adjustment method provided in this application embodiment is not limited to scenarios where clipping occurs. Even if clipping does not occur, if the AC current output by the welding power supply cannot meet the welding requirements, the waveform of the AC current output by the welding power supply can be adjusted by the control method provided in this application embodiment.
[0069] For example, in the above example, if the maximum AC current output of the welding power supply is kept below the maximum allowable output current of 550A, but the waveform coefficient is increased from K1 to K4, Figure 2gThis diagram illustrates the waveform comparison of the welding power supply output AC current before and after the AC current setting value was changed in this example. Waveform M represents the waveform before the setting waveform coefficient was changed, and waveform Q represents the waveform after the setting waveform coefficient was changed. Figure 2g As shown, due to the increased set waveform coefficient of the AC current, the waveform of the output AC current becomes "fatter" in the horizontal direction. However, since the maximum current value of the welding power supply's output AC current remains unchanged at 550A, the height of the output AC current remains constant. Consequently, the effective value I3 corresponding to the output AC current of the welding power supply based on the increased set waveform coefficient K4 will be greater than the set value I1. If the actual welding requirement necessitates welding with an AC current equivalent to I1, the actual waveform of the welding power supply's output AC current needs to be adjusted. Optionally, this can be achieved by decreasing the set waveform coefficient from K4 to K1 while keeping the maximum current value of the welding power supply's output AC current unchanged at 550A. In this case, the waveform of the welding power supply's output AC current will be adjusted from waveform Q to waveform M. The adjustment process can be found in [reference needed]. Figure 2h After adjusting the waveform coefficient, the waveform of the AC current output by the welding power supply is similar to... Figure 2g The waveform M is the same. In this way, by reducing the waveform coefficient, the maximum current value of the AC current output by the welding power supply does not exceed 550A and the corresponding effective value matches the set value I1, which can meet the actual welding requirements.
[0070] It is understood that the above embodiments are merely examples, and modifications can be made to the above embodiments in actual implementation. Those skilled in the art will understand that any modifications to the above embodiments that do not require creative effort fall within the protection scope of this application, and will not be described in detail in the embodiments.
[0071] Based on the same inventive concept, this application also provides a current output control device for AC welding. Since the principle of the current output control device in solving the problem is similar to that of the aforementioned current output control method, the implementation of the current output control device can refer to the implementation of the aforementioned current output control method, and the repeated parts will not be described again.
[0072] Figure 3a This application provides a structural block diagram of a current output control device according to an embodiment.
[0073] like Figure 3b As shown, the welding device 300 includes: a first setting module 310, a second setting module 320, a judgment module 330, an adjustment module 340, a selection module 350, a processing module 360, and an output module 370; wherein,
[0074] The first setting module 310 is used to set the set value of the AC current output by the welding power source; the second setting module 320 is used to set the set waveform coefficient (or set waveform, the specific setting content can be determined according to actual needs) of the AC current output by the welding power source; the judgment module 330 is used to determine whether the maximum current value of the AC current output by the welding power source according to the above setting value and the set waveform coefficient exceeds the maximum current allowed to be output by the welding power source, and then determines whether it is necessary to adjust the actual waveform of the AC current output by the welding power source; if it is determined that adjustment is needed, the adjustment module 340 adjusts the set waveform coefficient of the AC current output by the welding power source according to the set value of the AC current output by the welding power source and the maximum current allowed to be output by the welding power source; the selection module 350 is used to select the adjusted waveform coefficient and send it to the processing module 360, the processing module 360 is used to determine the actual waveform of the AC current output by the welding power source according to the adjusted waveform coefficient and the set value of the AC current output by the welding power source; the output module 370 is used to output the corresponding AC current according to the determined actual waveform.
[0075] It should be noted that the specific processing details of each of the above modules can be found in the descriptions of the corresponding parts in the above method embodiments, and will not be repeated here.
[0076] Figure 3b This is a structural block diagram of another current output control device provided in an embodiment of this application. Figure 3b As shown, the welding device 300 includes: a first acquisition module 301, a second acquisition module 302, a determination module 303, and a control module 304; wherein,
[0077] The first acquisition module 310 is used to acquire the set value of the AC current output by the welding power source and the set waveform coefficient of the corresponding waveform of the AC current; the second acquisition module 320 is used to acquire the first waveform coefficient; the first waveform coefficient is the minimum waveform coefficient corresponding to the set value; when the welding power source outputs AC current with the set value and the first waveform coefficient, the corresponding maximum current value is equal to the maximum current allowed to be output by the welding power source; the determination module 330 is used to determine the target waveform coefficient based on the set waveform coefficient and the first waveform coefficient; the control module 340 is used to control the welding power source to output AC current with the set value and the target waveform coefficient.
[0078] In one possible implementation, the determining module 330 determines the target waveform coefficient based on the set waveform coefficient and the first waveform coefficient, for: determining the first waveform coefficient as the target waveform coefficient if the first waveform coefficient is greater than the set waveform coefficient; or determining the set waveform coefficient as the target waveform coefficient if the first waveform coefficient is less than or equal to the set waveform coefficient.
[0079] In one possible implementation, the control module 340 is used to: control the welding power supply to output an alternating current at a set value and continuously change the magnitude of the waveform coefficient; if the maximum current value of the output alternating current is the maximum current allowed to be output by the welding power supply and the corresponding effective value matches the set value, the second acquisition module 320 is used to acquire the currently used waveform coefficient as the first waveform coefficient.
[0080] In one possible implementation, the second acquisition module 320 acquires the first waveform coefficient, which is used to: read the minimum waveform coefficient corresponding to the set value from the pre-stored first correspondence as the first waveform coefficient; the first correspondence includes multiple different set values for the output AC current of the welding power supply and the minimum waveform coefficient corresponding to each set value, and the minimum waveform coefficients corresponding to different set values are different.
[0081] In one possible implementation, the control module 340 is used to: control the welding power supply to output current with a first set value and a second waveform coefficient; the first set value is any one of a plurality of set values in a first correspondence; if the maximum current value of the output AC current is the maximum current allowed to be output by the welding power supply and the corresponding effective value matches the first set value, the determining module 330 is used to determine the second waveform coefficient as the minimum waveform coefficient corresponding to the first set value.
[0082] In one possible implementation, if the maximum current value of the output AC current is different from the maximum current allowed to be output by the welding power supply, and / or the corresponding effective value does not match the first set value, the control module 340 is used to sequentially control the welding power supply to output AC current with the first set value and a waveform coefficient different from the second waveform coefficient, until the maximum current value of the output AC current is the maximum current allowed to be output by the welding power supply and the corresponding effective value matches the first set value, the determination module 330 is used to determine that the currently used waveform coefficient is the minimum waveform coefficient corresponding to the first set value.
[0083] See Figure 4 , Figure 4 This is a structural block diagram of a computer device provided in an embodiment of this application. Figure 4 As shown, the computer device 400 may include a processor 401 and a memory 402; the memory 402 may be coupled to the processor 401. It is worth noting that... Figure 4 This is an example; other types of structures can also be used to supplement or replace this structure to achieve telecommunications functions or other functions.
[0084] In an optional embodiment, the function of the current output control device 300 can be integrated into the processor 401. The processor 401 can be configured to perform the following control:
[0085] Obtain the set value of the AC current output by the welding power source, and the set waveform coefficient of the corresponding AC current waveform;
[0086] Obtain the first waveform coefficient; the first waveform coefficient is the minimum waveform coefficient corresponding to the set value; when the welding power supply outputs AC current with the set value and the first waveform coefficient, the corresponding maximum current value is equal to the maximum current allowed to be output by the welding power supply.
[0087] The target waveform coefficients are determined based on the set waveform coefficients and the first waveform coefficients;
[0088] Control the welding power supply to output AC current with set value and target waveform coefficient.
[0089] Furthermore, in some alternative implementations, the computer device 400 may also include: a communication module, an input unit, an audio processor, a display, a power supply, etc. It is worth noting that the computer device 400 is not necessarily required to include these components. Figure 4 All components shown; in addition, computer device 400 may also include Figure 4 For components not shown, please refer to existing technologies.
[0090] In some alternative implementations, processor 401, sometimes also referred to as controller or operation control, may include a microprocessor or other processor device and / or logic device, which receives input and controls the operation of various components of computer device 400.
[0091] The memory 402 may be, for example, one or more of a cache, flash memory, hard drive, removable medium, volatile memory, non-volatile memory, or other suitable devices. It may store the aforementioned information related to the current output control device 300, and may also store programs for executing that information. The processor 401 may execute the program stored in the memory 402 to perform information storage or processing, etc.
[0092] An input unit can provide input to the processor 401. This input unit may be, for example, a keypad or touch input device. A power supply can be used to provide power to the computer device 400. A display can be used to display images and text, etc. This display may be, for example, an LCD display, but is not limited to this.
[0093] Memory 402 can be solid-state memory, such as read-only memory (ROM), random access memory (RAM), SIM card, etc. It can also be memory that retains information even when power is off, can be selectively erased, and contains more data; examples of this type of memory are sometimes referred to as EPROM, etc. Memory 402 can also be some other type of device. Memory 402 includes buffer memory (sometimes referred to as a buffer). Memory 402 may include an application / function storage unit for storing application programs and function programs or processes for executing operations of computer device 400 via processor 401.
[0094] The memory 402 may also include a data storage unit for storing data, such as contacts, digital data, pictures, sounds, and / or any other data used by the electronic device. The driver storage unit of the memory 402 may include various drivers for the computer device for communication functions and / or for performing other functions of the computer device (such as messaging applications, address book applications, etc.).
[0095] The communication module is a transmitter / receiver that sends and receives signals via an antenna. The communication module (transmitter / receiver) is coupled to the processor 401 to provide input signals and receive output signals, which is the same as in a conventional mobile communication terminal.
[0096] Based on different communication technologies, multiple communication modules can be configured in the same computer device, such as cellular network modules, Bluetooth modules, and / or wireless LAN modules. The communication module (transmitter / receiver) is also coupled to a speaker and microphone via an audio processor to provide audio output through the speaker and receive audio input from the microphone, thereby enabling typical telecommunications functions. The audio processor may include any suitable buffer, decoder, amplifier, etc. Additionally, the audio processor is coupled to processor 401, enabling on-device recording via the microphone and on-device playback of stored sound via the speakers.
[0097] Embodiments of this application also provide a computer-readable storage medium capable of implementing all steps of the current output control method in the above embodiments. The computer-readable storage medium stores a computer program that, when executed by a processor, implements all steps of the current output control method in the above embodiments. For example, when the processor executes the computer program, it implements the following steps:
[0098] Obtain the set value of the AC current output by the welding power source, and the set waveform coefficient of the corresponding AC current waveform;
[0099] Obtain the first waveform coefficient; the first waveform coefficient is the minimum waveform coefficient corresponding to the set value; when the welding power supply outputs AC current with the set value and the first waveform coefficient, the corresponding maximum current value is equal to the maximum current allowed to be output by the welding power supply.
[0100] The target waveform coefficients are determined based on the set waveform coefficients and the first waveform coefficients;
[0101] Control the welding power supply to output AC current with set value and target waveform coefficient.
[0102] In summary, the current output control method, current output control device, computer equipment, and computer-readable storage medium provided in the embodiments of this application all have the following advantages:
[0103] Based on the set value and waveform coefficient of the welding power supply's output AC current, the waveform of the output AC current is controlled. For any set value, by modifying the corresponding waveform coefficient, the actual waveform of the welding power supply's output AC current is adjusted. This ensures that the maximum current value of the welding power supply's output AC current is controlled within the maximum allowable output current of the welding power supply, and that the effective value of the welding power supply's output AC current matches the set value. In this way, clipping phenomenon can be avoided, ensuring welding results.
[0104] While this application provides method operation steps as shown in the embodiments or flowcharts, more or fewer operation steps may be included based on conventional or non-inventive labor. The order of steps listed in the embodiments is merely one possible execution order among many and does not represent the only execution order. In actual device or client product execution, the method can be executed sequentially as shown in the embodiments or drawings, or in parallel (e.g., in a parallel processor or multi-threaded processing environment).
[0105] Those skilled in the art will understand that the embodiments of this specification can be provided as methods, apparatus (systems), or computer program products. Therefore, the embodiments of this specification can take the form of entirely hardware embodiments, entirely software embodiments, or embodiments combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.
[0106] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.
[0107] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.
[0108] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.
[0109] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on its differences from other embodiments. In particular, the device and system embodiments are relatively simple in description because they are fundamentally similar to the method embodiments; relevant parts can be referred to the descriptions of the method embodiments. In this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. The terms "upper," "lower," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. It should be noted that, without conflict, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to any single aspect, nor to any single embodiment, nor to any combination and / or substitution of these aspects and / or embodiments. Moreover, each aspect and / or embodiment of this application can be used alone or in combination with one or more other aspects and / or embodiments.
[0110] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application.
[0111] In the description of this application, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship in the working state of this application. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.
[0112] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.
[0113] The present application has been described above with reference to preferred embodiments; however, these embodiments are merely exemplary and illustrative. Various substitutions and modifications can be made to the present application based on these embodiments, all of which fall within the protection scope of the present application.
Claims
1. A current output control method for AC welding, characterized in that, include: Obtain the set value of the AC current output by the welding power source, and the set waveform coefficient of the waveform corresponding to the AC current. The waveform coefficient is a real number. When the maximum current value of the AC current is the same, the larger the waveform coefficient, the larger the area enclosed by the waveform and the time axis. Obtain the first waveform coefficient; the first waveform coefficient is the minimum waveform coefficient corresponding to the set value; when the welding power source outputs AC current with the set value and the first waveform coefficient, the corresponding maximum current value is equal to the maximum current allowed to be output by the welding power source; Based on the set waveform coefficients and the first waveform coefficients, the target waveform coefficients are determined; The welding power supply is controlled to output alternating current at the set value and the target waveform coefficient; The step of determining the target waveform coefficient based on the set waveform coefficient and the first waveform coefficient includes: if the first waveform coefficient is greater than the set waveform coefficient, determining the first waveform coefficient as the target waveform coefficient; or, if the first waveform coefficient is less than or equal to the set waveform coefficient, determining the set waveform coefficient as the target waveform coefficient.
2. The method according to claim 1, characterized in that, The process of obtaining the first waveform coefficients includes: The welding power supply is controlled to output alternating current at the set value and the waveform coefficient is continuously changed. If the maximum current value of the output AC current is the maximum current allowed to be output by the welding power supply and the corresponding effective value matches the set value, then the waveform coefficient currently in use is determined to be the first waveform coefficient.
3. The method according to claim 1, characterized in that, The process of obtaining the first waveform coefficients includes: From the pre-stored first correspondence, the minimum waveform coefficient corresponding to the set value is read as the first waveform coefficient; the first correspondence includes multiple different set values for the output AC current of the welding power supply and the minimum waveform coefficient corresponding to each set value, and the minimum waveform coefficients corresponding to different set values are different.
4. The method according to claim 3, characterized in that, The method further includes: The welding power supply is controlled to output current at a first set value and a second waveform coefficient; the first set value is any one of a plurality of set values in the first correspondence relationship; If the maximum current value of the output AC current is the maximum current allowed to be output by the welding power supply and the corresponding effective value matches the first set value, then the second waveform coefficient is determined to be the minimum waveform coefficient corresponding to the first set value.
5. The method according to claim 4, characterized in that, The method further includes: If the maximum current value of the output AC current is different from the maximum current allowed to be output by the welding power supply, and / or the corresponding effective value does not match the first set value, the welding power supply is sequentially controlled to output AC current with the first set value and a waveform coefficient different from the second waveform coefficient, until the maximum current value of the output AC current is the maximum current allowed to be output by the welding power supply and the corresponding effective value matches the first set value, and the waveform coefficient currently used is determined to be the minimum waveform coefficient corresponding to the first set value.
6. A current output control device for AC welding, characterized in that, include: The first acquisition module is used to acquire the set value of the AC current output by the welding power source and the set waveform coefficient of the waveform corresponding to the AC current. The waveform coefficient is a real number. When the maximum current value of the AC current is the same, the larger the waveform coefficient, the larger the area enclosed by the waveform and the time axis. The second acquisition module is used to acquire a first waveform coefficient; the first waveform coefficient is the minimum waveform coefficient corresponding to the set value; when the welding power source outputs AC current with the set value and the first waveform coefficient, the corresponding maximum current value is equal to the maximum current allowed to be output by the welding power source. The determining module is used to determine the target waveform coefficient based on the set waveform coefficient and the first waveform coefficient; The control module is used to control the welding power supply to output AC current at the set value and the target waveform coefficient; The determining module determines a target waveform coefficient based on the set waveform coefficient and the first waveform coefficient, and is used to: determine the first waveform coefficient as the target waveform coefficient if the first waveform coefficient is greater than the set waveform coefficient; or determine the set waveform coefficient as the target waveform coefficient if the first waveform coefficient is less than or equal to the set waveform coefficient.
7. A computer device, characterized in that, It includes a processor and a memory, the memory storing computer programs / instructions, and the processor executing the computer programs / instructions to implement the method as described in any one of claims 1-5.
8. A storage medium storing computer programs / instructions, characterized in that, When the computer program / instructions are executed by the processor, they are used to implement the method as described in any one of claims 1-5.