Anti-crosstalk aluminum coil disc pulse group frequency division driving method and system for electromagnetic heating electric rice cooker

Abstract

The application relates to the field of electromagnetic coil control of electric rice cookers, and discloses an anti-crosstalk aluminum coil disc pulse group frequency division driving method and system for an electromagnetic heating electric rice cooker. The method comprises the following steps: acquiring preset coil working characteristics of multiple aluminum coil discs of the electromagnetic heating electric rice cooker in pulse group frequency division driving respectively; synchronously sampling coil voltage and coil current of the multiple aluminum coil discs of the electromagnetic heating electric rice cooker in pulse group frequency division driving; determining the coil working characteristics corresponding to the coil voltage and the coil current of each aluminum coil disc; determining, through a coil working characteristic comparison unit, a difference between the first coil working characteristic corresponding to the first aluminum coil disc and the preset first coil working characteristic as a first distortion index corresponding to the first aluminum coil disc; and switching a first working frequency of the first aluminum coil disc to a first backup working frequency when the first distortion index is greater than or equal to a preset first distortion index. The application can avoid power regulation signal distortion of the aluminum coil disc in the heating process.

Description

Technical Field

[0001] This application relates to the field of electromagnetic coil control technology for rice cookers, and more specifically, to a method and system for anti-crosstalk aluminum coil disc pulse group frequency division driving for electromagnetic heating rice cookers. Background Technology

[0002] Electromagnetic heating (IH) rice cookers operate on the principle of electromagnetic induction heating. The main control unit outputs a high-frequency alternating current to the coil, generating an alternating magnetic field. When this magnetic field passes through the magnetically conductive inner pot, eddy currents are induced on its surface. These eddy currents are converted into heat energy within the magnetic material due to resistance, thus heating the food inside. Structurally, an electromagnetic heating rice cooker mainly consists of a coil, a main control unit, a magnetically conductive inner pot, an outer shell, and a heat insulation layer. These components work together to regulate heating power and stabilize temperature.

[0003] In the selection of coil materials for electromagnetic heating rice cookers, aluminum coils reduce raw material costs by approximately 40%-50% compared to traditional copper coils. Furthermore, aluminum's density is only one-third that of copper, allowing for a reduction of over 30% in the overall weight of the coil, thus lowering the overall weight and manufacturing cost of the rice cooker. Additionally, aluminum coils are easier to process and shape, facilitating mass production. However, aluminum coils also have significant drawbacks in practical applications. Due to aluminum's lower conductivity (approximately 61% of copper) and magnetic coupling characteristics, aluminum coils are prone to generating high-frequency electromagnetic radiation noise during heating. This noise can crosstalk to the main control unit's signal lines through spatial radiation or circuit conduction, causing power regulation signal distortion and resulting in heating power fluctuations. These fluctuations can range from ±12% to 18%, leading to uneven temperature distribution within the inner pot and affecting the taste of the cooked food. Summary of the Invention

[0004] The purpose of this application is to provide a pulse group frequency division driving method and system for an anti-crosstalk aluminum coil for an electromagnetic heating rice cooker, which solves the technical problem that the aluminum coil is prone to high-frequency electromagnetic noise crosstalk during the heating process, which leads to power regulation signal distortion, and achieves the technical effect of avoiding power regulation signal distortion of the aluminum coil during the heating process.

[0005] This application provides a method for anti-crosstalk aluminum coil pulse group frequency division driving of an electromagnetic heating rice cooker. The method includes: acquiring preset coil operating characteristics corresponding to multiple aluminum coils of the electromagnetic heating rice cooker in pulse group frequency division driving; synchronously sampling the coil voltage and coil current of multiple aluminum coils of the electromagnetic heating rice cooker in pulse group frequency division driving; determining the coil operating characteristics corresponding to the coil voltage and coil current of each aluminum coil through a heating feature extraction unit; wherein, the preset coil operating characteristics and coil operating characteristics include total harmonic distortion (THD), multiple pulses in the pulse group corresponding to each aluminum coil have the same frequency during operation, and multiple pulses in the pulse groups corresponding to different aluminum coils have different frequencies during operation; determining the difference between the first coil operating characteristics corresponding to the first aluminum coil and the preset first coil operating characteristics through a coil operating characteristic comparison unit, as a first distortion index corresponding to the first aluminum coil; when the first distortion index is greater than or equal to the preset first distortion index, switching the first operating frequency of the first aluminum coil to a first backup operating frequency.

[0006] In one possible implementation, when the first distortion index is greater than or equal to a preset first distortion index, the first operating frequency of the first aluminum coil is switched to the first standby operating frequency, including: obtaining a working frequency switching lookup table corresponding to the first aluminum coil; obtaining the first standby operating frequency corresponding to the preset first distortion index through the working frequency switching lookup table; and switching the first operating frequency of the first aluminum coil to the first standby operating frequency when the first distortion index is greater than or equal to the preset first distortion index.

[0007] In another possible implementation, the method further includes: using an impedance feature extraction unit to perform Fourier transform on the coil voltage and coil current corresponding to the first aluminum coil within a preset time period to determine the first equivalent impedance change value of the first aluminum coil within the preset time period; obtaining the first equivalent impedance change condition corresponding to when the pot is removed from the electromagnetic heating rice cooker; when the first equivalent impedance change value does not meet the first equivalent impedance change condition, and when the first distortion index is greater than or equal to the preset first distortion index, switching the first operating frequency of the first aluminum coil to the first backup operating frequency.

[0008] In another possible implementation, the method further includes: determining the first pulse group stagger time corresponding to the first distortion index through a working frequency switching lookup table; when the first equivalent impedance change value does not meet the first equivalent impedance change condition, and when the first distortion index is greater than or equal to the preset first distortion index, increasing the pulse group stagger time of the first aluminum coil and the adjacent aluminum coil of the first aluminum coil.

[0009] In another possible implementation, the method further includes: obtaining the working mode of the electromagnetic heating rice cooker and obtaining the pulse group misalignment adjustment factor corresponding to the working mode of the electromagnetic heating rice cooker; determining the product of the first pulse group misalignment time and the pulse group misalignment adjustment factor as the first adjusted pulse group misalignment time; wherein, the working mode of the electromagnetic heating rice cooker includes a rice cooking mode and a soup making mode; when the first distortion index is greater than or equal to the preset first distortion index, the pulse group misalignment time of the first aluminum coil and the adjacent aluminum coil of the first aluminum coil is increased by the first adjusted pulse group misalignment time.

[0010] In another possible implementation, the method further includes: acquiring multiple pulse group staggering adjustment records of the electromagnetic heating rice cooker in the first working mode, and acquiring multiple first anti-crosstalk adjustment effect values ​​after pulse group staggering adjustment of the electromagnetic heating rice cooker in the first working mode; wherein, the first anti-crosstalk adjustment effect value includes the reduction magnitude of the first distortion index before and after pulse group staggering adjustment; determining the maximum first anti-crosstalk adjustment effect value among the multiple first anti-crosstalk adjustment effect values, and determining the target first adjustment pulse group staggering time corresponding to the maximum first anti-crosstalk adjustment effect value; when the first distortion index is greater than or equal to the preset first distortion index in the first working mode, increasing the target first adjustment pulse group staggering time for the pulse group staggering time of the first aluminum coil and the adjacent aluminum coil of the first aluminum coil.

[0011] In another possible implementation, the method further includes: using a switching time determination unit to determine a first switching moment when the operating frequencies of the first aluminum coil disk and its adjacent aluminum coil disks do not interfere with each other, based on the pulse group period and pulse group timing of the first aluminum coil disk and its adjacent aluminum coil disks; when the first distortion index is greater than or equal to a preset first distortion index, the first operating frequency of the first aluminum coil disk is switched to the first backup operating frequency at the first switching moment.

[0012] In another possible implementation, the method further includes: when the number of aluminum coils whose operating frequencies need to be switched is greater than or equal to the preset number of aluminum coils, the cooperative matching unit determines multiple switching times at which the operating frequencies of the first aluminum coil and its adjacent aluminum coils do not interfere with each other, based on the operating frequencies and pulse group timing of the first aluminum coil and its adjacent aluminum coils, with different aluminum coils corresponding to different switching times; and at the multiple switching times, the operating frequencies of the multiple aluminum coils are switched to the backup operating frequencies respectively.

[0013] In another possible implementation, the method further includes: after switching the operating frequency of multiple aluminum coils to the standby operating frequency at multiple switching times, sampling and acquiring the distortion index of multiple aluminum coils respectively; when the distortion index of multiple aluminum coils is less than the distortion index corresponding to the aluminum coil, the standby operating frequency switching of multiple aluminum coils is completed; when the first distortion index of the first aluminum coil is greater than or equal to the first distortion index corresponding to the first aluminum coil, the pulse group staggering time of the first aluminum coil and the adjacent aluminum coil of the first aluminum coil is increased again by the first adjustment pulse group staggering time.

[0014] This application also provides an anti-crosstalk aluminum coil pulse group frequency division drive system for an electromagnetic heating rice cooker, including a unit for implementing the above-described anti-crosstalk aluminum coil pulse group frequency division drive method for an electromagnetic heating rice cooker.

[0015] The beneficial effects of the embodiments in this application compared with the prior art are:

[0016] This application provides a method for anti-crosstalk aluminum coil pulse group frequency division driving of an electromagnetic heating rice cooker. The method includes: acquiring preset coil operating characteristics corresponding to multiple aluminum coils of the electromagnetic heating rice cooker in pulse group frequency division driving; synchronously sampling the coil voltage and coil current of multiple aluminum coils of the electromagnetic heating rice cooker in pulse group frequency division driving; determining the coil operating characteristics corresponding to the coil voltage and coil current of each aluminum coil through a heating feature extraction unit; wherein, the preset coil operating characteristics and coil operating characteristics include total harmonic distortion (THD), multiple pulses in the pulse group corresponding to each aluminum coil have the same frequency during operation, and multiple pulses in the pulse groups corresponding to different aluminum coils have different frequencies during operation; determining the difference between the first coil operating characteristics corresponding to the first aluminum coil and the preset first coil operating characteristics through a coil operating characteristic comparison unit, as a first distortion index corresponding to the first aluminum coil; when the first distortion index is greater than or equal to the preset first distortion index, switching the first operating frequency of the first aluminum coil to a first backup operating frequency. The method in this embodiment of the application can accurately capture the characteristic shift caused by harmonic distortion crosstalk, provide a reliable basis for frequency switching, improve the accuracy of crosstalk identification, and switch only specific aluminum coils with specific distortion indicators exceeding the standard to specific backup operating frequencies, thereby avoiding the conduction of crosstalk between coils and realizing crosstalk isolation under multi-coil frequency division drive. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art 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.

[0018] Figure 1 A schematic flowchart illustrating the first anti-crosstalk aluminum coil pulse group frequency division driving method for an electromagnetic heating rice cooker provided in this application embodiment;

[0019] Figure 2 A schematic diagram illustrating the workflow of the first anti-crosstalk aluminum coil pulse group frequency division driving method for an electromagnetic heating rice cooker provided in this application embodiment;

[0020] Figure 3 A schematic flowchart illustrating the second anti-crosstalk aluminum coil pulse group frequency division driving method for an electromagnetic heating rice cooker provided in this application embodiment;

[0021] Figure 4 A schematic diagram illustrating the workflow of the second anti-crosstalk aluminum coil pulse group frequency division driving method for an electromagnetic heating rice cooker provided in this application embodiment;

[0022] Figure 5 A schematic diagram illustrating the workflow of the third anti-crosstalk aluminum coil pulse group frequency division driving method for an electromagnetic heating rice cooker provided in this application embodiment;

[0023] Figure 6 A schematic diagram illustrating the workflow of the fourth anti-crosstalk aluminum coil pulse group frequency division driving method for an electromagnetic heating rice cooker provided in this application embodiment;

[0024] Figure 7 A schematic flowchart illustrating the fifth anti-crosstalk aluminum coil pulse group frequency division driving method for an electromagnetic heating rice cooker provided in this application embodiment;

[0025] Figure 8 A schematic flowchart illustrating the sixth anti-crosstalk aluminum coil pulse group frequency division driving method for an electromagnetic heating rice cooker provided in this application embodiment;

[0026] Figure 9 A schematic diagram illustrating the workflow of the sixth anti-crosstalk aluminum coil pulse group frequency division driving method for an electromagnetic heating rice cooker provided in this application embodiment;

[0027] Figure 10 This is a schematic diagram of the logic structure of an anti-crosstalk aluminum coil pulse group frequency division drive system for an electromagnetic heating rice cooker, provided in an embodiment of this application. Detailed Implementation

[0028] It should be understood that, when used in this application specification and the appended claims, the term "comprising" indicates the presence of the described features, integrals, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or a collection thereof.

[0029] It should also be understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0030] As used in this application specification and the appended claims, the term "if" may be interpreted, depending on the context, as "when," "once," "in response to determination," or "in response to detection." Similarly, the phrase "if determined" or "if detected [the described condition or event]" may be interpreted, depending on the context, as meaning "once determined," "in response to determination," "once detected [the described condition or event]," or "in response to detection [the described condition or event]."

[0031] Furthermore, in the description of this application and the appended claims, the terms "first," "second," "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0032] References to "one embodiment" or "some embodiments" as described in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0033] The aluminum coil of an electromagnetic heating rice cooker is prone to generating high-frequency electromagnetic radiation noise during the heating process. This noise can crosstalk to the signal circuit of the main control unit through spatial radiation or circuit conduction, causing power regulation signal distortion and thus causing fluctuations in heating power, which affects the taste of the cooked food.

[0034] Based on the above reasons, this application provides a method for anti-crosstalk aluminum coil plate pulse group frequency division driving for an electromagnetic heating rice cooker. The method includes: acquiring preset coil operating characteristics corresponding to multiple aluminum coil plates of the electromagnetic heating rice cooker in pulse group frequency division driving; synchronously sampling the coil voltage and coil current of multiple aluminum coil plates of the electromagnetic heating rice cooker in pulse group frequency division driving; determining the coil operating characteristics corresponding to the coil voltage and coil current of each aluminum coil plate through a heating feature extraction unit; wherein, the preset coil operating characteristics and coil operating characteristics include total harmonic distortion rate, the frequency of multiple pulses in the pulse group corresponding to each aluminum coil plate is the same during operation, and the frequency of multiple pulses in the pulse group corresponding to different aluminum coil plates is different during operation; determining the difference between the first coil operating characteristics corresponding to the first aluminum coil plate and the preset first coil operating characteristics through a coil operating characteristic comparison unit, as the first distortion index corresponding to the first aluminum coil plate; when the first distortion index is greater than or equal to the preset first distortion index, switching the first operating frequency of the first aluminum coil plate to the first backup operating frequency. The method in this embodiment of the application can accurately capture the characteristic shift caused by harmonic distortion crosstalk, provide a reliable basis for frequency switching, improve the accuracy of crosstalk identification, and switch only specific aluminum coils with specific distortion indicators exceeding the standard to specific backup operating frequencies, thereby avoiding the conduction of crosstalk between coils and realizing crosstalk isolation under multi-coil frequency division drive.

[0035] In some scenarios, the anti-crosstalk aluminum coil pulse group frequency division driving method for electromagnetic heating rice cookers according to the embodiments of this application can be applied to rice cookers that are heated by electromagnetic induction. It can be used for electromagnetic induction control of rice cookers, especially for rice cookers with multiple aluminum coils, which can uniformly heat the pot body of the rice cooker and improve the stability and uniformity of heating the pot body of the rice cooker.

[0036] The following describes in detail, with specific examples, an anti-crosstalk aluminum coil pulse group frequency division driving method for an electromagnetic heating rice cooker provided in this application.

[0037] Figure 1 A schematic flowchart illustrating the first anti-crosstalk aluminum coil pulse group frequency division driving method for an electromagnetic heating rice cooker provided in this application embodiment is shown below. Figure 1 As shown in the embodiment of this application, an anti-crosstalk aluminum coil pulse group frequency division driving method for an electromagnetic heating rice cooker is provided, including S110 to S120. S110 to S120 will be described in detail below.

[0038] S110. Obtain the preset coil operating characteristics corresponding to the multiple aluminum coils of the electromagnetic heating rice cooker in pulse group frequency division drive, and synchronously sample the coil voltage and coil current of the multiple aluminum coils of the electromagnetic heating rice cooker in pulse group frequency division drive. Through the heating feature extraction unit, determine the coil operating characteristics corresponding to the coil voltage and coil current of each aluminum coil. Among them, the preset coil operating characteristics and coil operating characteristics include total harmonic distortion rate. During operation, the frequencies of multiple pulses in the pulse group corresponding to each aluminum coil are the same, and the frequencies of multiple pulses in the pulse group corresponding to different aluminum coils are different.

[0039] Figure 2 A schematic diagram illustrating the workflow of the first anti-crosstalk aluminum coil pulse group frequency division driving method for an electromagnetic heating rice cooker provided in this application embodiment is shown below. Figure 2 As shown, during the operation of the electromagnetic heating rice cooker, the preset coil operating characteristics of multiple aluminum coils in the pulse group frequency division drive can be obtained, and the coil voltage and coil current of multiple aluminum coils in the pulse group frequency division drive can be sampled simultaneously.

[0040] For example, the preset coil operating characteristics and coil operating characteristics may include total harmonic distortion (THD), which can quantify whether the working state of the aluminum coil is normal.

[0041] For example, during operation, the multiple pulses in the pulse group corresponding to each aluminum coil disk have the same frequency, while the multiple pulses in the pulse group corresponding to different aluminum coil disks have different frequencies. Thus, the state of the aluminum coil disk can be detected by the total harmonic distortion rate of each aluminum coil disk in the pulse group.

[0042] For example, when cooking in an electromagnetic heating rice cooker, the preset coil operating characteristics corresponding to each aluminum coil can be pre-set. These preset characteristics can reflect the electrical characteristics under ideal working conditions. By synchronously sampling the coil voltage and coil current, the timeliness and consistency of the collected data can be ensured, providing an accurate data basis for subsequent analysis.

[0043] In this implementation, the coil operating characteristics corresponding to the coil voltage and coil current of each aluminum coil disk can be determined by the heating feature extraction unit. The heating feature extraction unit can be implemented based on signal processing algorithms and can extract key feature parameters reflecting the coil operating state from the original voltage and current data.

[0044] For example, the heating feature extraction unit can first remove the DC component and perform windowing preprocessing on the coil voltage signal and coil current signal, and then use Fast Fourier Transform to convert the time-domain coil voltage signal and coil current signal into a frequency-domain spectrum. In the spectrum, the 50Hz fundamental component is accurately located and its amplitude value is extracted as a reference. At the same time, the 2nd to 40th harmonic components are identified and the amplitude of each harmonic is calculated. Then, the total harmonic distortion (THD) of the aluminum coil disc is calculated by using the ratio of the square root of the sum of the squares of each harmonic amplitude to the fundamental amplitude.

[0045] S120. The difference between the first coil operating characteristic corresponding to the first aluminum coil disk and the preset first coil operating characteristic is determined by the coil operating characteristic comparison unit, and is used as the first distortion index corresponding to the first aluminum coil disk. When the first distortion index is greater than or equal to the preset first distortion index, the first operating frequency of the first aluminum coil disk is switched to the first backup operating frequency.

[0046] like Figure 2 As shown, the difference between the first coil working characteristics corresponding to the first aluminum coil disk and the preset first coil working characteristics can be determined by the coil working characteristic comparison unit, and used as the first distortion index corresponding to the first aluminum coil disk. The first distortion index can quantify the degree of deviation between the actual working characteristics and the preset characteristics.

[0047] In this implementation, when the first distortion index is greater than or equal to the preset first distortion index, the first operating frequency of the first aluminum coil can be switched to the first standby operating frequency. The frequency switching can be achieved by adjusting the driving frequency of the aluminum coil to change its electromagnetic field characteristics, thereby avoiding the continuous expansion of crosstalk effects.

[0048] In this implementation, the first backup operating frequency is used to increase the frequency difference between the first aluminum coil and other adjacent aluminum coils, so as to reduce the impact of electromagnetic crosstalk on the first aluminum coil.

[0049] For example, when an electromagnetic heating rice cooker drives multiple aluminum coils simultaneously, if the first distortion index of the first aluminum coil exceeds the preset first distortion index, it indicates that the first coil may be affected by crosstalk from other coils. In this case, the operating frequency of the first aluminum coil can be switched to a preset spare frequency to change its resonance characteristics and achieve crosstalk isolation.

[0050] The beneficial effect of the above implementation method is that it first obtains the preset coil operating characteristics of multiple aluminum coil disks, simultaneously samples the coil voltage and current of each coil disk, obtains the actual coil operating characteristics through the feature extraction unit, and then calculates the first distortion index of the first aluminum coil disk by the coil operating characteristic comparison unit. By harmonic distortion quantification crosstalk, it can accurately capture the feature offset caused by crosstalk, provide a reliable basis for frequency switching, and improve the accuracy of crosstalk identification.

[0051] The beneficial effect of the above implementation method is that, by configuring preset features, operating frequencies and backup frequencies for multiple aluminum coils, and independently performing sampling, feature extraction and distortion judgment, only switching to a specific backup operating frequency for specific aluminum coils with excessive distortion indicators can avoid crosstalk transmission between coils and achieve crosstalk isolation under multi-coil frequency division drive.

[0052] In some implementations, in the above-mentioned S120, when the first distortion index is greater than or equal to the preset first distortion index, the first operating frequency of the first aluminum coil is switched to the first standby operating frequency, including S121 to S122. S121 to S122 will be explained in detail below.

[0053] S121. Obtain the operating frequency switching lookup table corresponding to the first aluminum coil. Using the operating frequency switching lookup table, obtain the first standby operating frequency corresponding to the preset first distortion index.

[0054] In this implementation, a working frequency switching lookup table corresponding to the first aluminum coil can be obtained. The working frequency switching lookup table can be pre-stored in the control system of the rice cooker, which records the backup working frequencies corresponding to different distortion index ranges.

[0055] For example, in the pulse group frequency division drive process of the anti-crosstalk aluminum coil of an electromagnetic heating rice cooker, the working frequency switching lookup table can contain multiple preset first distortion index values ​​and corresponding first standby working frequencies. By querying this lookup table, the first standby working frequency corresponding to the preset first distortion index can be quickly obtained.

[0056] In this implementation, the operating frequency switching lookup table can be configured separately for each aluminum coil. Each aluminum coil can have its own exclusive operating frequency switching lookup table, which can record the correspondence between the specific distortion index of the coil and the standby operating frequency.

[0057] For example, in the multi-aluminum coil system of an electromagnetic heating rice cooker, each coil can be configured with an independent working frequency switching reference table. When a coil has a distortion index that exceeds the standard, the frequency switching operation can be performed according to the reference table of that coil.

[0058] S122. When the first distortion index is greater than or equal to the preset first distortion index, the first operating frequency of the first aluminum coil is switched to the first standby operating frequency.

[0059] In this implementation, when the first distortion index is greater than or equal to the preset first distortion index, the first operating frequency of the first aluminum coil can be switched to the first backup operating frequency, and the crosstalk problem can be dealt with by adjusting the driving frequency of the aluminum coil.

[0060] For example, when an electromagnetic heating rice cooker is working, if the first distortion index of the first aluminum coil exceeds the preset first distortion index, the working frequency can be immediately switched to the corresponding first backup working frequency to maintain the working stability of the coil.

[0061] The beneficial effect of the above implementation method is that, firstly, the working frequency switching reference table corresponding to the first aluminum coil disk is obtained. When the first distortion index is determined to be greater than or equal to the preset first distortion index by the coil working characteristic comparison unit, the first backup working frequency corresponding to the preset first distortion index is accurately obtained through the reference table. By establishing the correspondence between the distortion index and the backup frequency, it can be ensured that the first backup working frequency after switching is adapted to the current crosstalk level, thereby improving the accuracy of the aluminum coil disk driving frequency adaptation.

[0062] The beneficial effect of the above implementation method is that, before the first distortion index is detected to exceed the standard, the working frequency switching reference table of the first aluminum coil has been obtained in advance. When the switching conditions are met, the corresponding first backup working frequency can be directly retrieved through the reference table, saving the extra time spent on frequency matching. This can shorten the time from detecting crosstalk to completing frequency switching, quickly respond to crosstalk problems, reduce the impact of crosstalk on the stability of coil voltage and current, and ensure the continuity of the pulse group frequency division drive of the aluminum coil.

[0063] The beneficial effects of the above implementation method are that other aluminum coils can be configured with their own reference tables. When the distortion of a certain coil exceeds the standard, the switching is performed according to its own reference table. The establishment of a unified frequency switching standard for multiple coils can realize the standardized management of frequency switching under the frequency division drive of multiple aluminum coils, avoid the confusion of switching logic of different coils, ensure the normal operation of unaffected coils, and improve the orderliness of the overall drive system.

[0064] In some implementations, Figure 3 A schematic flowchart illustrating the second anti-crosstalk aluminum coil pulse group frequency division driving method for an electromagnetic heating rice cooker provided in this application embodiment is shown below. Figure 3 As shown, the above method also includes S210 to S220, which will be described in detail below.

[0065] S210. Using the impedance feature extraction unit, perform Fourier transform on the coil voltage and coil current corresponding to the first aluminum coil within a preset time period to determine the first equivalent impedance change value of the first aluminum coil within the preset time period. Obtain the first equivalent impedance change condition corresponding to when the pot is removed from the electromagnetic heating rice cooker.

[0066] Figure 4A schematic diagram illustrating the workflow of the second anti-crosstalk aluminum coil pulse group frequency division driving method for an electromagnetic heating rice cooker provided in this application embodiment is shown below. Figure 4 As shown, in order to improve the accuracy of distortion index extraction, the impedance feature extraction unit can perform Fourier transform on the coil voltage and coil current corresponding to the first aluminum coil disk within a preset time period to determine the first equivalent impedance change value of the first aluminum coil disk within the preset time period. This process can analyze the frequency domain characteristics of the coil voltage and coil current, thereby accurately reflecting the impedance change of the first aluminum coil disk within the preset time period.

[0067] For example, in the pulse group frequency division drive process of the aluminum coil of an electromagnetic heating rice cooker, the impedance feature extraction unit can continuously collect the time-series data of coil voltage and coil current, convert the time-domain signal into a frequency-domain signal through Fourier transform, and then calculate the first equivalent impedance change value. This change value can characterize the impedance dynamic characteristics of the aluminum coil within a preset time period.

[0068] In this implementation, the first equivalent impedance change condition corresponding to the removal of the pot from the coil of the electromagnetic heating rice cooker can be obtained. This condition can be determined based on historical data or experimental tests, reflecting the typical characteristics of the impedance change of the aluminum coil when the pot is removed.

[0069] For example, in the actual use of an electromagnetic heating rice cooker, when the pot is removed from the coil, the equivalent impedance of the aluminum coil will undergo a specific change. By recording these changes, the first equivalent impedance change condition can be established as a reference standard for judging whether the pot has been removed.

[0070] S220. When the first equivalent impedance change value does not meet the first equivalent impedance change condition, and when the first distortion index is greater than or equal to the preset first distortion index, the first operating frequency of the first aluminum coil is switched to the first standby operating frequency.

[0071] In this implementation, when the first equivalent impedance change value does not meet the first equivalent impedance change condition, and when the first distortion index is greater than or equal to the preset first distortion index, the first working frequency of the first aluminum coil can be switched to the first standby working frequency. This judgment process can ensure that the frequency switching operation is only performed when the pot is inside the rice cooker.

[0072] For example, during the pulse group frequency division drive of the aluminum coil of an electromagnetic heating rice cooker, if the detected change value of the first equivalent impedance does not conform to the characteristics of removing the pot, and the first distortion index reaches or exceeds the preset value, it indicates that the pot of the rice cooker is being heated and there may be a real crosstalk problem. In this case, switching the first working frequency to the first backup working frequency can reduce the crosstalk effect.

[0073] The beneficial effect of the above implementation method is that, firstly, the coil voltage and coil current of the first aluminum coil are Fourier transformed by the impedance feature extraction unit to obtain the first equivalent impedance change value within a preset time period, and then compared with the first equivalent impedance change condition when the pot is removed from the electromagnetic heating rice cooker coil; only when the first equivalent impedance change value does not meet the condition that the pot is not removed, and the first distortion index is determined to be greater than or equal to the preset value by the coil working feature comparison unit, the working frequency is switched. By distinguishing between crosstalk and distortion caused by removing the pot, the misjudgment of distortion caused by removing the pot can be eliminated, the real crosstalk can be accurately identified, and the accuracy of crosstalk judgment can be improved.

[0074] The beneficial effect of the above implementation method is that the switching from the first operating frequency to the first standby operating frequency is only performed in the crosstalk scenario when the pot is placed normally. This can avoid unnecessary frequency switching interference to the drive system, maintain the stable state of the aluminum coil disc pulse group frequency division drive, and ensure the stability of coil voltage and current.

[0075] The beneficial effect of the above implementation method is that, considering the actual working condition of removing the pot from the electromagnetic heating rice cooker, the first equivalent impedance change value is obtained through the impedance feature extraction unit and matched with the first equivalent impedance change condition of removing the pot. After filtering out the effective working condition of "the pot is not removed", the crosstalk problem is then handled, so that the anti-crosstalk method can be adapted to the actual scenario of removing the pot, improving the adaptability to different working conditions, ensuring that the anti-crosstalk action is only executed under the effective working condition, and avoiding drive abnormalities caused by misjudgment of working conditions.

[0076] In some implementations, the above method also includes S130 to S140, which are described in detail below.

[0077] S130. Determine the peak shift time of the first pulse group corresponding to the first distortion index by using the working frequency switching reference table.

[0078] Figure 5 A schematic diagram illustrating the workflow of the third anti-crosstalk aluminum coil pulse group frequency division driving method for an electromagnetic heating rice cooker provided in this application embodiment is shown below. Figure 5 As shown, the first pulse group stagger time corresponding to the first distortion index can also be determined by the working frequency switching lookup table. The working frequency switching lookup table stores the mapping relationship between different distortion indices and the corresponding pulse group stagger time, which can quickly find the corresponding first pulse group stagger time based on the currently detected first distortion index.

[0079] For example, in the anti-crosstalk aluminum coil pulse group frequency division driving method of electromagnetic heating rice cooker, when the first distortion index is detected, the first pulse group stagger time corresponding to the first distortion index can be obtained by querying the working frequency switching lookup table, so as to provide an accurate reference value for subsequent pulse group stagger time adjustment.

[0080] S140. When the change value of the first equivalent impedance does not meet the condition of the change of the first equivalent impedance, and when the first distortion index is greater than or equal to the preset first distortion index, the pulse group staggering time of the first aluminum coil and the adjacent aluminum coil of the first aluminum coil is increased by the first pulse group staggering time.

[0081] In this implementation, when the change value of the first equivalent impedance does not meet the condition of the first equivalent impedance change, and when the first distortion index is greater than or equal to the preset first distortion index, the pulse group staggering time of the first aluminum coil and the adjacent aluminum coil of the first aluminum coil can be increased. This adjustment operation reduces the pulse group superposition interference between adjacent aluminum coils by increasing the pulse group staggering time.

[0082] For example, in the anti-crosstalk aluminum coil pulse group frequency division driving method of electromagnetic heating rice cooker, when the first equivalent impedance change value does not meet the first equivalent impedance change condition and the first distortion index exceeds the preset first distortion index, the pulse group stagger time of the first aluminum coil and its adjacent aluminum coil can be increased at the same time, thereby effectively reducing the pulse group crosstalk between adjacent coils.

[0083] The beneficial effect of the above implementation method is that, firstly, the first pulse group shunting time corresponding to the current first distortion index is obtained through the working frequency switching lookup table; when the first equivalent impedance change value meets the operating conditions and the first distortion index is greater than or equal to the preset value, the pulse group shunting time of the first aluminum coil and the adjacent aluminum coil of the first aluminum coil is increased, focusing on the source of pulse group crosstalk between adjacent coils, directly weakening the pulse group superposition interference of the first coil and the adjacent coils. Compared with simply adjusting the frequency, it can more accurately suppress crosstalk between adjacent coils and improve the targeting of anti-crosstalk.

[0084] The beneficial effect of the above implementation method is that when the anti-crosstalk action is triggered, the working parameters of the first aluminum coil are no longer adjusted alone. Instead, based on the staggered time obtained from the working frequency switching lookup table, the staggered time of the pulse group of the first aluminum coil and its adjacent aluminum coil are increased simultaneously, forming a dual-coil coordinated control. This breaks the limitation of independent adjustment of a single coil, enables the coordinated optimization of the parameters of related coils, avoids insufficient crosstalk compensation of adjacent coils caused by the adjustment of a single coil, and improves the operational coordination and stability of the entire electromagnetic heating rice cooker aluminum coil drive system.

[0085] The beneficial effects of the above implementation method are that the first pulse group stagger time is obtained through the working frequency switching lookup table, which can accurately match the value corresponding to the current first distortion index. The stagger time corresponds to the distortion degree caused by the current crosstalk, which can avoid over- or under-adjustment of the stagger time, so that the stagger operation is accurately matched with the actual crosstalk intensity, and further improves the accuracy of anti-crosstalk adjustment under pulse group frequency division drive.

[0086] In some implementations, the above method also includes S150 to S160, which are described in detail below.

[0087] S150. Obtain the operating mode of the electromagnetic heating rice cooker and the pulse group peak-shaving adjustment factor corresponding to the operating mode of the electromagnetic heating rice cooker. Determine the product of the first pulse group peak-shaving time and the pulse group peak-shaving adjustment factor as the first adjusted pulse group peak-shaving time. The operating modes of the electromagnetic heating rice cooker include rice cooking mode and soup making mode.

[0088] Figure 6 A schematic diagram illustrating the workflow of the fourth anti-crosstalk aluminum coil pulse group frequency division driving method for an electromagnetic heating rice cooker provided in this application embodiment is shown below. Figure 6 As shown, the working mode of the electromagnetic heating rice cooker can be obtained, and the pulse group peak shifting adjustment factor corresponding to the working mode of the electromagnetic heating rice cooker can be obtained. The working mode can include different cooking modes such as rice cooking mode and soup making mode.

[0089] In this implementation, the pulse group peak shifting adjustment factor can be preset according to the characteristics of different operating modes. It is used to reflect the degree of demand and adaptability of pulse group peak shifting time adjustment under different modes. The pulse group peak shifting adjustment factor can balance the power demand and anti-crosstalk measures to adapt to different operating modes.

[0090] For example, in the rice cooking mode and soup making mode of an electromagnetic heating rice cooker, the requirements for pulse group peak shifting time will differ due to the different heating power requirements and durations. By obtaining the pulse group peak shifting adjustment factor for the corresponding working mode, a suitable adjustment benchmark can be provided for subsequent pulse group peak shifting time adjustments.

[0091] For example, the pulse group peak shifting adjustment factor corresponding to the working mode of an electromagnetic heating rice cooker can be determined by empirical value, and then the anti-crosstalk measures for different working modes can be improved.

[0092] In this implementation, the product of the first pulse group staggered time and the pulse group staggered adjustment factor can be determined as the first adjusted pulse group staggered time. The first pulse group staggered time is the basic staggered time parameter. By multiplying it with the pulse group staggered adjustment factor, the staggered time parameter applicable to the current working mode can be obtained. When the pulse group staggered adjustment factor is larger, the time interval between pulse groups is larger, and the impact on the heating power of the rice cooker is also greater.

[0093] For example, in the rice cooking mode, the pulse group staggering adjustment factor may be larger, and the calculated first adjustment pulse group staggering time is also correspondingly larger, so as to moderately ignore the impact on heating power and improve the anti-crosstalk effect; while in the soup cooking mode, the adjustment factor may be smaller, and the calculated first adjustment pulse group staggering time is also correspondingly smaller, so as to avoid the impact on heating power as much as possible and improve the anti-crosstalk effect. In this way, a suitable pulse group staggering time adjustment amount can be generated according to the characteristics of different working modes.

[0094] S160. When the first distortion index is greater than or equal to the preset first distortion index, the pulse group staggering time of the first aluminum coil and the adjacent aluminum coil of the first aluminum coil is increased by the first adjustment pulse group staggering time.

[0095] In this implementation, when the first distortion index is greater than or equal to the preset first distortion index, the pulse group staggering time of the first aluminum coil and the adjacent aluminum coil of the first aluminum coil can be increased by the first adjustment pulse group staggering time to adjust the pulse group staggering time of the aluminum coil.

[0096] For example, when an electromagnetic heating rice cooker is working, if the first distortion index is detected to exceed the preset first distortion index, it indicates that the electromagnetic interference between the current aluminum coils is relatively serious. At this time, increasing the pulse group staggering time of the first aluminum coil and the adjacent aluminum coils can effectively reduce the impact of electromagnetic crosstalk.

[0097] The beneficial effects of the above implementation method are as follows: It obtains the working mode of the electromagnetic heating rice cooker, and then obtains the pulse group misalignment adjustment factor corresponding to that mode; it calculates the product of the first pulse group misalignment time and the adjustment factor to obtain the first adjusted pulse group misalignment time; when the first distortion index is greater than or equal to the preset first distortion index, the pulse group misalignment time of the first aluminum coil and its adjacent aluminum coils is increased by this adjustment time, which can adapt to the operating requirements of different modes, making the misalignment adjustment match different working modes, improving the anti-crosstalk targeting, and optimizing the working stability of the electromagnetic heating rice cooker under different modes; it further refines the anti-crosstalk adjustment amount, improves the pulse group misalignment time adjustment accuracy, more accurately responds to crosstalk, and enhances the reliability of the aluminum coil drive.

[0098] In some implementations, Figure 7A flowchart illustrating the fifth anti-crosstalk aluminum coil pulse group frequency division driving method for an electromagnetic heating rice cooker provided in this application embodiment is shown below. Figure 7 As shown, the above method also includes S310 to S320, which are described in detail below.

[0099] S310. Obtain multiple pulse group peak-shifting adjustment records of the electromagnetic heating rice cooker in the first working mode, and obtain multiple first anti-crosstalk adjustment effect values ​​after pulse group peak-shifting adjustment of the electromagnetic heating rice cooker in the first working mode. The first anti-crosstalk adjustment effect value includes the reduction magnitude of the first distortion index before and after pulse group peak-shifting adjustment.

[0100] In this implementation, the method can also obtain multiple pulse group peak shifting adjustment records of the electromagnetic heating rice cooker in the first working mode, and at the same time obtain multiple corresponding first anti-crosstalk adjustment effect values. The first anti-crosstalk adjustment effect value includes the reduction of the first distortion index before and after the pulse group peak shifting adjustment. These records and effect values ​​can be continuously collected and stored by the control system of the electromagnetic heating rice cooker to form a historical adjustment database.

[0101] For example, during the operation of an electromagnetic heating rice cooker, the parameter settings and corresponding anti-crosstalk effects of each pulse group peak shift adjustment can be recorded. The first anti-crosstalk adjustment effect value can reflect the actual effect of different adjustment parameters on improving electromagnetic interference, providing a reference for subsequent adjustments.

[0102] S310. Determine the maximum first anti-crosstalk adjustment effect value among multiple first anti-crosstalk adjustment effect values, and determine the target first adjustment pulse group staggering time corresponding to the maximum first anti-crosstalk adjustment effect value. When the first distortion index is greater than or equal to the preset first distortion index in the first working mode, increase the target first adjustment pulse group staggering time for the pulse group staggering time of the first aluminum coil and the adjacent aluminum coil of the first aluminum coil.

[0103] After obtaining multiple first anti-crosstalk adjustment effect values, the largest first anti-crosstalk adjustment effect value can be determined, and the target first adjustment pulse group stagger time corresponding to the largest first anti-crosstalk adjustment effect value can be found. This determination process can be completed by comparing and analyzing the effect data in historical adjustment records, thereby selecting the optimal adjustment parameters.

[0104] For example, multiple first anti-crosstalk adjustment effect values ​​can be traversed, and the adjustment record with the best effect can be identified by sorting or comparison algorithms, and its corresponding pulse group staggering time parameter can be extracted as the target adjustment value.

[0105] In this implementation, when the first distortion index is detected to be greater than or equal to the preset first distortion index in the first working mode, the target first adjustment pulse group staggering time can be increased for the pulse group staggering time of the first aluminum coil and its adjacent aluminum coil, and electromagnetic crosstalk can be avoided by modifying the pulse group driving timing.

[0106] For example, during the operation of an electromagnetic heating rice cooker, if the first distortion index is detected to exceed the preset threshold, the current driving parameters can be adjusted immediately by using the historically optimal first adjustment pulse group peak shift time, thereby effectively suppressing electromagnetic crosstalk.

[0107] The beneficial effects of the above implementation method are that it obtains the peak-shifting adjustment records of multiple pulse groups in the first working mode of the electromagnetic heating rice cooker, and the corresponding first anti-crosstalk adjustment effect value, determines the target first adjustment pulse group peak-shifting time corresponding to the maximum first anti-crosstalk adjustment effect value, increases the target time when the first distortion index is greater than or equal to the preset value, and filters the adjustment parameters based on the historical best effect, thereby maximizing the anti-crosstalk adjustment effect, significantly improving the reduction of the first distortion index, and enhancing the driving stability of the aluminum coil.

[0108] The beneficial effects of the above implementation method are that by calling the historical pulse group peak shifting adjustment record and the first anti-crosstalk adjustment effect value in the first working mode, there is no need to re-acquire the adjustment factor. The target adjustment time can be directly selected, and the verified effective data can be reused to simplify the process. This can reduce the computational overhead of the control system, speed up the anti-crosstalk response, and improve the real-time performance and efficiency of the electromagnetic heating rice cooker.

[0109] The beneficial effects of the above implementation method are that it accumulates exclusive adjustment records and effect values ​​for the first working mode, and improves the operating characteristics of the aluminum coil disk with data adaptation within the mode based on the optimal target time adjustment in this mode. This makes the pulse group peak-shifting adjustment highly matched with the first working mode, further improving the adjustment accuracy and optimizing the anti-crosstalk targeting.

[0110] In some implementations, Figure 8 A schematic flowchart illustrating the sixth anti-crosstalk aluminum coil pulse group frequency division driving method for an electromagnetic heating rice cooker provided in this application embodiment is shown below. Figure 8 As shown, the above method also includes S410 to S420, which are described in detail below.

[0111] S410. The switching time determination unit determines the first switching time when the operating frequency of the first aluminum coil disk and the operating frequency of the adjacent aluminum coil disks of the first aluminum coil disk do not interfere with each other, based on the pulse group period and pulse group timing of the first aluminum coil disk and the adjacent aluminum coil disks of the first aluminum coil disk.

[0112] Figure 9 A schematic diagram illustrating the workflow of the sixth anti-crosstalk aluminum coil pulse group frequency division driving method for an electromagnetic heating rice cooker provided in this application embodiment is shown below. Figure 9 As shown, the switching time determination unit can determine the first switching moment when the operating frequencies of the first aluminum coil and its adjacent aluminum coils do not interfere with each other, based on the pulse group period and pulse group timing of the first aluminum coil and its adjacent aluminum coils. The process of determining the first switching moment takes into account the coordination relationship between the pulse group period and pulse group timing of the first aluminum coil and its adjacent aluminum coils, and can identify the optimal time for frequency switching.

[0113] For example, in the anti-crosstalk aluminum coil pulse group frequency division driving method of electromagnetic heating rice cooker, the switching time determination unit can analyze the pulse group period and pulse group timing of the first aluminum coil and the adjacent aluminum coil. By calculating the time interval and phase relationship of the pulse group period, the first switching time can be determined. The first switching time can ensure that the first aluminum coil will not generate electromagnetic interference with the adjacent aluminum coil when switching the working frequency.

[0114] For example, when determining the first switching time at which the operating frequency of the first aluminum coil disk does not interfere with the operating frequency of the adjacent aluminum coil disks, the first switching time of the adjacent aluminum coil disks can be staggered in timing, thereby avoiding electromagnetic interference between the adjacent aluminum coil disks.

[0115] S420. When the first distortion index is greater than or equal to the preset first distortion index, the first operating frequency of the first aluminum coil is switched to the first standby operating frequency at the first switching moment.

[0116] In this implementation, when the first distortion index is greater than or equal to the preset first distortion index, the first operating frequency of the first aluminum coil can be switched to the first backup operating frequency at the first switching time. By performing frequency switching at the first switching time, switching operations can be avoided during interference periods.

[0117] For example, in the anti-crosstalk aluminum coil pulse group frequency division drive method of electromagnetic heating rice cooker, when the first distortion index is detected to exceed the preset first distortion index, the working frequency of the first aluminum coil can be switched from the first working frequency to the first standby working frequency at a predetermined first switching time. This switching method can ensure that no additional electromagnetic interference is introduced during the frequency switching process, and maintain the stable operation of the coil.

[0118] The beneficial effects of the above implementation method are that it obtains the pulse group period and pulse group timing of the first aluminum coil and the adjacent aluminum coil, and then determines the first switching time based on the pulse group period. The first switching time is the switching opportunity when the first aluminum coil switches its operating frequency without interfering with the adjacent aluminum coil. When the first distortion index is greater than or equal to the preset first distortion index, the first operating frequency of the first aluminum coil is switched to the first backup operating frequency at the first switching time. This can accurately match the interference-free time, greatly improve the accuracy of the frequency switching time, prevent the introduction of new interference due to improper switching time, and ensure the accurate execution of the frequency switching action.

[0119] The beneficial effects of the above implementation method are that, based on the pulse group period of the first aluminum coil and the adjacent coil, the first switching moment without interference can be locked, the working state of the coil can be kept stable during the switching, the operation stability of the first aluminum coil frequency switching process can be guaranteed, the switching can prevent the coil voltage and current fluctuations and abnormal coil working characteristics caused by the switching can be prevented, the first distortion index can be further reduced, and the overall operation stability of the electromagnetic heating rice cooker can be improved.

[0120] In some implementations, the above method also includes S430 to S440, which are described in detail below.

[0121] S430. When the number of aluminum coils whose operating frequencies need to be switched is greater than or equal to the preset number of aluminum coils, the cooperative matching unit determines multiple switching times for the operating frequencies of the first aluminum coil and its adjacent aluminum coils without interference, based on the operating frequencies and pulse group timing of the first aluminum coil and its adjacent aluminum coils. Different aluminum coils correspond to different switching times.

[0122] In this implementation, when the number of aluminum coils whose operating frequencies need to be switched is greater than or equal to the preset number of aluminum coils, the cooperative matching unit can further determine multiple switching times for the operating frequencies of the first aluminum coil and its adjacent aluminum coils without interference, based on the operating frequencies and pulse group timing of the first aluminum coil and its adjacent aluminum coils. Different aluminum coils correspond to different switching times, and the cooperative matching unit can coordinate the frequency switching times of multiple aluminum coils.

[0123] For example, the preset number of aluminum coils can be 3.

[0124] In this implementation, in the multi-aluminum coil system of an electromagnetic heating rice cooker, when the number of aluminum coils that need to switch operating frequencies reaches or exceeds the preset number of aluminum coils, a coordinated matching unit can be used for overall planning. The coordinated matching unit can analyze the operating frequency parameters and pulse group timing characteristics of the first aluminum coil and its adjacent aluminum coils, and calculate multiple non-interfering switching times to ensure that each aluminum coil has its own dedicated switching time point.

[0125] For example, the collaborative matching unit can be an intelligent decision-making module based on a timing optimization algorithm. The collaborative matching unit can be trained using historical operating frequency data, pulse group timing data, and switching time samples, enabling the collaborative matching unit to comprehensively consider the operating status of multiple aluminum coils. The calculation process of the collaborative matching unit fully considers the compatibility of operating frequencies and the coordination of pulse group timing.

[0126] S440: At multiple switching times, the operating frequency of multiple aluminum coils is switched to the standby operating frequency.

[0127] After determining multiple switching times, the operating frequency of each aluminum coil can be switched to the standby operating frequency at these specific times. The switching operation is performed sequentially according to the predetermined timing. By precisely controlling the switching timing of each aluminum coil, a smooth transition in the frequency switching process is ensured.

[0128] For example, when an electromagnetic heating rice cooker is heating the pot body at the same time, if the number of aluminum coils that need to switch operating frequencies is greater than or equal to the preset number of aluminum coils, multiple non-interfering switching times can be planned through a coordinated matching unit. The frequency switching of each aluminum coil can be completed at different switching times, thereby avoiding electromagnetic interference caused by multiple aluminum coils switching frequencies at the same time.

[0129] The beneficial effect of the above implementation method is that when the number of aluminum coils that need to switch operating frequencies is greater than or equal to the preset number of aluminum coils, the cooperative matching unit determines multiple switching times that allow the operating frequencies of these aluminum coils to operate without interference based on the operating frequencies and pulse group timing of the first aluminum coil and adjacent aluminum coils. Different aluminum coils correspond to different switching times. Then, at these times, the operating frequency of each aluminum coil is switched to the backup operating frequency. By coordinating the frequency and timing parameters of multiple coils and planning dedicated switching times through the cooperative matching unit, the coordination of multiple aluminum coils switching frequencies at the same time can be significantly improved, avoiding switching conflicts caused by lack of coordination, effectively avoiding mutual interference during the switching of multiple coils, and ensuring the stability of coil operating characteristics such as coil voltage, current and total harmonic distortion during the switching process.

[0130] The beneficial effects of the above implementation method are that, while meeting the need for simultaneous switching of multiple trays, interference is avoided through timing planning, balancing efficiency and stability, efficiently completing the frequency switching of multiple trays, preventing the increase of distortion indicators caused by switching, ensuring the overall stable operation of the electromagnetic heating rice cooker, and achieving a balance between switching efficiency and operational stability.

[0131] In some implementations, the above method also includes S450 to S460, which are described in detail below.

[0132] S450: After switching the operating frequency of multiple aluminum coil disks to the backup operating frequency at multiple switching times, the distortion index of multiple aluminum coil disks is sampled and obtained respectively.

[0133] In this implementation, after switching the operating frequency of multiple aluminum coil disks to the backup operating frequency at multiple switching times, the distortion index of multiple aluminum coil disks can be sampled and obtained respectively. These distortion indexes can reflect the signal quality changes of the aluminum coil disks after frequency switching.

[0134] For example, in the anti-crosstalk aluminum coil pulse group frequency division drive method of electromagnetic heating rice cooker, the operating frequency of each aluminum coil can be switched to a preset backup operating frequency at the switching time. Then, the distortion index of multiple aluminum coils can be determined by the method in S110-S120 of the above method. In this way, the operating status of each aluminum coil after frequency switching can be comprehensively monitored.

[0135] S460. When the distortion index of multiple aluminum coils is less than the distortion index corresponding to the aluminum coil, the standby operating frequency switching of multiple aluminum coils is completed. When the first distortion index of the first aluminum coil is greater than or equal to the first distortion index corresponding to the first aluminum coil, the pulse group staggering time of the first aluminum coil and the adjacent aluminum coil of the first aluminum coil is increased again by the first adjustment pulse group staggering time.

[0136] In this implementation, when the distortion index of multiple aluminum coils is less than the corresponding distortion index of the aluminum coil, the backup operating frequency switching of multiple aluminum coils can be completed, thereby ensuring that all aluminum coils can meet the expected signal quality requirements after frequency switching.

[0137] For example, when an electromagnetic heating rice cooker is working, if the distortion index of all aluminum coils is less than its corresponding distortion index, it means that the frequency switching operation has made the distortion index of each coil meet the requirements, and at this time it can be confirmed that the switching process of the standby working frequency has been completed.

[0138] In this implementation, when the first distortion index of the first aluminum coil is greater than or equal to the first distortion index corresponding to the first aluminum coil, the pulse group staggering time of the first aluminum coil and the adjacent aluminum coils of the first aluminum coil can be increased again by the first adjustment pulse group staggering time. This operation can specifically improve the crosstalk problem of a specific aluminum coil.

[0139] For example, if the distortion index of a certain aluminum coil is still detected to be excessive during the operation of an electromagnetic heating rice cooker, the mutual interference can be further reduced by increasing the pulse group stagger time of that coil and the adjacent coil. This targeted adjustment can effectively improve the electromagnetic crosstalk of a specific aluminum coil.

[0140] The beneficial effect of the above implementation method is that after switching multiple aluminum coil disks to the standby operating frequency at multiple switching times, the distortion index of each coil is sampled; if the first distortion index of the first aluminum coil disk still exceeds the standard, the first adjustment pulse group staggering time of the pulse group of the first aluminum coil disk and the adjacent coil is increased again, and the single switching deficiency is made up for by the second adjustment, so as to ensure that the distortion index of the multiple coils meets the standard and improve the anti-crosstalk stability.

[0141] The beneficial effects of the above implementation method are that, for multiple aluminum coils, after completing the frequency switching at their respective switching times, the distortion index is sampled uniformly, rather than adjusting only a single coil; when the index of a certain coil still exceeds the standard, the linkage adjustment and the staggered peak time of adjacent coils can achieve multi-coil collaborative optimization, avoid the limitations of single adjustment, and enhance the overall anti-crosstalk capability.

[0142] This application also provides an anti-crosstalk aluminum coil pulse group frequency division drive system for an electromagnetic heating rice cooker, including a unit for implementing the above-described anti-crosstalk aluminum coil pulse group frequency division drive method for an electromagnetic heating rice cooker.

[0143] Figure 10 A schematic diagram of the logic structure of an anti-crosstalk aluminum coil pulse group frequency division drive system for an electromagnetic heating rice cooker provided in this application embodiment is shown below. Figure 10 As shown, the system 1 of this embodiment includes a processing unit 11, a storage unit 12, and a transceiver unit 13. The processing unit 11 is used to process data, the storage unit 12 is used to store data, and the transceiver unit 13 is used to send and receive data. The processing unit 11, the storage unit 12, and the transceiver unit 13 cooperate with each other to implement the above-described method. The beneficial effects of the embodiments of this application have been described in the above-described method and will not be repeated here.

[0144] It should be noted that the information interaction and execution process between the above-mentioned devices / units are based on the same concept as the method embodiments of this application. For details on their specific functions and technical effects, please refer to the method embodiments section, and they will not be repeated here.

[0145] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the above-described division of functional units and modules is merely an example. In practical applications, the above functions can be assigned to different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiments can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit. Furthermore, the specific names of the functional units and modules are only for easy differentiation and are not intended to limit the scope of protection of this application. The specific working process of the units and modules in the above system can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0146] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, all or part of the processes in the methods of the above embodiments of this application can be implemented by a computer program instructing related hardware. The computer program can be stored in a computer-readable storage medium, and when executed by a processor, it can implement the steps of the various method embodiments described above. The computer program includes computer program code, which can be in the form of source code, object code, executable files, or certain intermediate forms. The computer-readable medium can include at least: any entity or device capable of carrying computer program code to a photographing device / terminal device, a recording medium, a computer memory, a read-only memory (ROM), a random access memory (RAM), an electrical carrier signal, a telecommunication signal, and a software distribution medium. Examples include USB flash drives, portable hard drives, magnetic disks, or optical disks. In some jurisdictions, according to legislation and patent practice, computer-readable media cannot be electrical carrier signals or telecommunication signals.

[0147] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail or recorded in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0148] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0149] In the embodiments provided in this application, it should be understood that the disclosed apparatus and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative. For instance, the division of modules or units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0150] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0151] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended 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 of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A pulse group frequency division driving method for an anti-crosstalk aluminum coil for an electromagnetic heating rice cooker, characterized in that, The method includes: The method acquires the preset coil operating characteristics of multiple aluminum coils in an electromagnetic heating rice cooker under pulse group frequency division drive, and synchronously samples the coil voltage and coil current of the multiple aluminum coils in the pulse group frequency division drive. Through the heating feature extraction unit, the coil operating characteristics corresponding to the coil voltage and coil current of each aluminum coil are determined. Among them, the preset coil operating characteristics and coil operating characteristics include total harmonic distortion rate. During operation, the frequencies of multiple pulses in the pulse group corresponding to each aluminum coil are the same, and the frequencies of multiple pulses in the pulse group corresponding to different aluminum coils are different. The difference between the first coil operating characteristic and the preset first coil operating characteristic corresponding to the first aluminum coil disk is determined by the coil operating characteristic comparison unit, and is used as the first distortion index corresponding to the first aluminum coil disk; when the first distortion index is greater than or equal to the preset first distortion index, the first operating frequency of the first aluminum coil disk is switched to the first backup operating frequency.

2. The method according to claim 1, characterized in that, When the first distortion index is greater than or equal to the preset first distortion index, the first operating frequency of the first aluminum coil is switched to the first standby operating frequency, including: Obtain the working frequency switching reference table corresponding to the first aluminum coil; obtain the first spare working frequency corresponding to the preset first distortion index through the working frequency switching reference table; When the first distortion index is greater than or equal to the preset first distortion index, the first operating frequency of the first aluminum coil is switched to the first standby operating frequency.

3. The method according to claim 2, characterized in that, The method further includes: The impedance feature extraction unit performs Fourier transform on the coil voltage and coil current corresponding to the first aluminum coil within a preset time period to determine the first equivalent impedance change value of the first aluminum coil within the preset time period; and obtains the first equivalent impedance change condition corresponding to the removal of the pot body from the electromagnetic heating rice cooker. When the first equivalent impedance change value does not meet the first equivalent impedance change condition, and when the first distortion index is greater than or equal to the preset first distortion index, the first operating frequency of the first aluminum coil is switched to the first standby operating frequency.

4. The method according to claim 3, characterized in that, The method further includes: The peak shift time of the first pulse group corresponding to the first distortion index is determined by using the working frequency switching reference table; When the change value of the first equivalent impedance does not meet the condition of the first equivalent impedance change, and when the first distortion index is greater than or equal to the preset first distortion index, the pulse group staggering time of the first aluminum coil and the adjacent aluminum coil of the first aluminum coil is increased by the first pulse group staggering time.

5. The method according to claim 4, characterized in that, The method further includes: The working mode of the electromagnetic heating rice cooker is obtained, and the pulse group peak shaving adjustment factor corresponding to the working mode of the electromagnetic heating rice cooker is obtained; the product of the first pulse group peak shaving time and the pulse group peak shaving adjustment factor is determined as the first adjustment pulse group peak shaving time; wherein, the working mode of the electromagnetic heating rice cooker includes rice cooking mode and soup making mode. When the first distortion index is greater than or equal to the preset first distortion index, the pulse group staggering time of the first aluminum coil and the adjacent aluminum coil of the first aluminum coil is increased by the first adjustment pulse group staggering time.

6. The method according to claim 5, characterized in that, The method further includes: The system acquires multiple pulse group peak shifting adjustment records of the electromagnetic heating rice cooker in the first working mode, and acquires multiple first anti-crosstalk adjustment effect values ​​of the electromagnetic heating rice cooker after pulse group peak shifting adjustment in the first working mode; wherein, the first anti-crosstalk adjustment effect value includes the reduction of the first distortion index before and after pulse group peak shifting adjustment. Determine the maximum first anti-crosstalk adjustment effect value among multiple first anti-crosstalk adjustment effect values, and determine the target first adjustment pulse group stagger time corresponding to the maximum first anti-crosstalk adjustment effect value; when the first distortion index is greater than or equal to the preset first distortion index in the first working mode, increase the target first adjustment pulse group stagger time for the pulse group stagger time of the first aluminum coil and the adjacent aluminum coil of the first aluminum coil.

7. The method according to claim 6, characterized in that, The method further includes: The switching time determination unit determines the first switching moment when the operating frequency of the first aluminum coil disk and the operating frequency of the adjacent aluminum coil disks of the first aluminum coil disk do not interfere with each other, based on the pulse group period and pulse group timing of the first aluminum coil disk and the adjacent aluminum coil disks of the first aluminum coil disk. When the first distortion index is greater than or equal to the preset first distortion index, the first operating frequency of the first aluminum coil is switched to the first standby operating frequency at the first switching moment.

8. The method according to claim 7, characterized in that, The method further includes: When the number of aluminum coils whose operating frequencies need to be switched is greater than or equal to the preset number of aluminum coils, the cooperative matching unit determines multiple switching times for the operating frequencies of the first aluminum coil and its adjacent aluminum coils without interference, based on the operating frequencies and pulse group timing of the first aluminum coil and its adjacent aluminum coils. Different aluminum coils correspond to different switching times. At multiple switching moments, the operating frequencies of multiple aluminum coils are switched to the backup operating frequencies.

9. The method according to claim 8, characterized in that, The method further includes: After switching the operating frequency of multiple aluminum coils to the backup operating frequency at multiple switching times, the distortion index of multiple aluminum coils is sampled and obtained respectively. When the distortion index of multiple aluminum coils is less than the distortion index corresponding to the aluminum coil, the backup working frequency switching of multiple aluminum coils is completed; when the first distortion index of the first aluminum coil is greater than or equal to the first distortion index corresponding to the first aluminum coil, the pulse group staggering time of the first aluminum coil and the adjacent aluminum coil of the first aluminum coil is increased again by the first adjustment pulse group staggering time.

10. A pulse group frequency division drive system for an anti-crosstalk aluminum coil for an electromagnetic heating rice cooker, characterized in that, Includes units for implementing the method of any one of claims 1 to 9.

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