An automatic detection method for high-frequency induction heating coil matching degree

Abstract

This application relates to the technical field of induction heating circuits and discloses an automatic detection method for the matching degree of a high-frequency induction heating coil. The automatic detection method includes a control chip with a pre-set data recording module to record operating data collected by a sampling module; the control chip parses the operating data to adjust the operating frequency of the high-frequency induction heating system; the control chip determines whether the operating power output by the induction heating circuit within the frequency range of the high-frequency induction heating system meets a preset ratio; if the preset ratio is met, the determination result of the induction coil and the high-frequency induction heating system is output as "matched"; if the preset ratio is not met, the determination result of the induction coil and the high-frequency induction heating system is output as "mismatched," and corresponding debugging prompts are output. This application proposes a detection method that can assist customers in better optimizing induction coils and detecting the matching degree of induction coils with related equipment without the need for dedicated measuring tools.

Description

Technical Field

[0001] This application relates to the technical field of induction heating circuits, and in particular to an automatic detection method for the matching degree of high-frequency induction heating coils. Background Technology

[0002] In an induction heating circuit, the inverter output side is connected in series or parallel with the induction coil. Different power outputs are achieved by adjusting the state of the capacitor and the induction coil. The output capacitor is usually a fixed capacity set by the factory, while the induction coil is wound by the customer.

[0003] Each device has its fixed operating frequency range. Due to differences in winding processes among different customers, induction coil mismatch often occurs. Specifically, an induction coil that is too short or too long will result in different inductance values. During operation, this manifests as different output power values, or even excessively high or low output power, thus causing the induction heating circuit to malfunction.

[0004] Therefore, in order to assist customers in better optimizing induction coils without the need for specialized measuring tools, a testing method is proposed to detect the degree of matching between the induction coil and the relevant equipment. Summary of the Invention

[0005] The technical problem to be solved by this application is to propose a testing method that can help customers better optimize induction coils in the absence of dedicated measuring tools, so as to test the degree of matching between the induction coil and related equipment.

[0006] To address the aforementioned problems, this application provides an automatic detection method for the matching degree of a high-frequency induction heating coil. This automatic detection method is applied to a high-frequency induction heating system, which includes an induction heating circuit, a sampling module, and a control chip. The output terminal of the induction heating circuit is connected to the induction coil. The control chip establishes electrical and communication connections with both the induction heating circuit and the sampling module to achieve signal and data information transmission. The automatic detection method includes:

[0007] The control chip has a built-in data recording module to record the operating data collected by the sampling module; the operating data includes the operating frequency and operating power of the induction heating circuit.

[0008] The control chip analyzes the operating data to adjust the operating frequency of the high-frequency induction heating system;

[0009] The control chip determines whether the operating power output by the induction heating circuit within the frequency range of the high-frequency induction heating system meets a preset ratio; the preset ratio is the ratio of the operating power of the induction heating circuit to the maximum power value of the high-frequency induction heating system.

[0010] If the preset ratio is met, the result of the determination that the induction coil and the high-frequency induction heating system are "matched" is output.

[0011] If the preset ratio is not met, the result of the determination of the induction coil and the high-frequency induction heating system is "mismatched", and the corresponding debugging prompt information is output.

[0012] Preferably, the control chip has a pre-installed data recording module to record the operating data collected by the sampling module, including:

[0013] The control chip drives the induction heating circuit to run for a first duration starting from the highest frequency of the high-frequency induction heating system.

[0014] If a signal is received indicating that the induction heating circuit has completed the first duration of operation, the sampling module records the operation data.

[0015] Preferably, the step of the control chip parsing the operating data to adjust the operating frequency of the high-frequency induction heating system includes:

[0016] The control chip receives and parses the operating data to obtain the average power.

[0017] The frequency change step size of the high-frequency induction heating system is modified according to the average power; the frequency change step size is the difference between the current frequency value and the next frequency value.

[0018] The operating frequency of the high-frequency induction heating system is reduced according to the frequency change step size, and then the induction heating circuit is driven to continue running for the first duration.

[0019] Within the frequency range of the high-frequency induction heating system, when the maximum power point of the induction heating circuit is detected, the induction heating circuit stops operating; the maximum power point is the operating point corresponding to when the average power exceeds the maximum power value of the high-frequency induction heating system.

[0020] Preferably, after the step of modifying the frequency change step size of the high-frequency induction heating system according to the average power, the method further includes:

[0021] If a signal is received that the high-frequency induction heating system has completed the frequency change step size modification, the second operation is paused.

[0022] Preferably, after the step of stopping the induction heating circuit when the maximum power point of the induction heating circuit is detected within the frequency range of the high-frequency induction heating system, the method further includes:

[0023] When the operating frequency of the high-frequency induction heating system drops to its minimum value, and the maximum power point of the induction heating circuit is still not detected, the induction heating circuit stops operating.

[0024] Preferably, the high-frequency induction heating system establishes a connection with the display to realize the transmission of signal and data information. The display is used to display a setting interface, which is preset with a result display module and a test confirmation module. Before the step of the control chip driving the induction heating circuit to start running for a first duration from the highest frequency of the high-frequency induction heating system, the method further includes:

[0025] The frequency range of the high-frequency induction heating system is preset within the control chip.

[0026] If the control chip receives a signal from the user that triggers the test confirmation module, it drives the induction heating circuit to start running.

[0027] Preferably, the step of the control chip determining whether the operating power output by the induction heating circuit within the frequency range of the high-frequency induction heating system meets a preset ratio includes:

[0028] Generate an operation record table based on the operation data;

[0029] Generate the frequency-power curve of the induction heating circuit based on the operation record table;

[0030] The power of the induction heating circuit at various operating frequencies of the high-frequency induction heating system can be obtained by analyzing the frequency-power curve.

[0031] Based on the power conditions, determine whether the operating power output by the induction heating circuit within the frequency range of the high-frequency induction heating system meets the preset ratio.

[0032] Preferably, after the step of determining whether the operating power output by the induction heating circuit within the frequency range of the high-frequency induction heating system meets a preset ratio based on the power condition, the method further includes:

[0033] The judgment result is output as text and displayed on the result display module; the display information of the result display module includes the induction coil matching result, the maximum power point, and the frequency corresponding to the maximum power point.

[0034] Preferably, the preset ratio is 5% to 100%.

[0035] Compared with the prior art, this application includes at least one of the following beneficial technical effects:

[0036] The control chip drives the induction heating circuit to operate from the highest frequency of the high-frequency induction heating system. After a first operating period, it pauses for a second period. During this second pause, the control chip analyzes the operating power of the induction heating circuit to obtain the average power of the first operating period. Based on the average power, it reduces the frequency change step size of the high-frequency induction heating system. After the pause, it resumes the first operating period, and this cycle continues until the control chip detects the maximum power point of the induction heating circuit, at which point data recording stops. If the induction heating circuit can output the power of the device within the frequency range of the high-frequency induction heating system, it indicates that the induction coil is matched with the device; if it does not meet the preset ratio, it indicates that the induction coil is not matched with the device, and corresponding debugging prompts are output. This automatic detection method can assist customers in better optimizing the induction coil and detecting the matching degree of the induction coil with the relevant equipment, even without dedicated measuring tools. Attached Figure Description

[0037] 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 some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 The circuit diagram is shown in the embodiment of the present invention for an induction heating circuit.

[0039] Figure 2 This is a flowchart illustrating the automatic detection method for coil matching degree provided in an embodiment of the present invention.

[0040] Figure 3 This is a schematic diagram illustrating an application scenario of the automatic detection method for coil matching degree provided in an embodiment of the present invention.

[0041] Figure 4 This is a schematic diagram of a sub-process of the automatic detection method for coil matching degree provided in an embodiment of the present invention.

[0042] Figure 5 This is a schematic diagram of another sub-process of the automatic detection method for coil matching degree provided in an embodiment of the present invention.

[0043] Figure 6 This is another sub-process diagram of the automatic detection method for coil matching degree provided in the embodiments of the present invention.

[0044] Figure 7The frequency-power curve of the sampling module corresponding to the induction coil is provided in the embodiment of the present invention.

[0045] Figure 8 The display settings interface provided in this embodiment of the invention.

[0046] Explanation of reference numerals in the attached diagram: G, three-phase power grid; L1, first inductor; L2, second inductor; L3, third inductor; L4, fourth inductor; Lr, induction coil; Ls, inductance; R, equivalent load; M1, first switching unit; M2, second switching unit; M3, third switching unit; M4, fourth switching unit; M5, fifth switching unit; T, high-frequency transformer; D1, first diode; D2, second diode; D3, third diode; D4, fourth diode; D5, fifth diode; D6, sixth diode; D7, seventh diode; C1, first polarized capacitor; C2, second polarized capacitor; C3, resonant capacitor; 11, induction heating circuit; 12, control chip; 13, sampling module. Detailed Implementation

[0047] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0048] It should be understood that, when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0049] It should also be understood that the terminology used in this application specification is for the purpose of describing particular embodiments only and is not intended to limit the application. As used in this application specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0050] It should also be further 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.

[0051] To address the problem in existing technologies of assisting customers in better optimizing induction coils (Lr) and detecting the matching degree of induction coils (Lr) with related equipment without the need for specialized measuring tools, this application provides an automatic detection method for the matching degree of high-frequency induction heating coils. This automatic detection method is applied to a high-frequency induction heating system installed in related induction heating equipment. The high-frequency induction heating system includes an induction heating circuit 11, a sampling module 13, and a control chip 12. The output terminal of the induction heating circuit 11 is connected to the induction coil (Lr). The control chip 12 establishes electrical and communication connections with both the induction heating circuit 11 and the sampling module 13 to achieve signal and data information transmission.

[0052] Please see Figure 1 , Figure 1 This is a circuit diagram of an induction heating circuit provided in an embodiment of the present invention. The induction heating circuit 11 includes a three-phase power grid, an uncontrolled rectifier module, a voltage regulating module, and a high-frequency inverter module. Phases A, B, and C of the three-phase power grid are connected to the uncontrolled rectifier module to output DC power. The voltage regulating module is connected to both the uncontrolled rectifier module and the high-frequency inverter module to adjust the output voltage of the uncontrolled rectifier module and output it to the high-frequency inverter module. By adjusting the drive signal of the high-frequency inverter module, an AC voltage is generated at the output terminal of the high-frequency inverter module. By adjusting the output voltage of the voltage regulating module, the high-frequency AC voltage output by the high-frequency inverter module is changed, ultimately achieving power regulation.

[0053] The voltage regulation module includes a first switching unit M1, a seventh diode D7, and a first inductor L1. The first connection terminal of the first switching unit M1 is connected to the negative terminal of the seventh diode D7 to form a first connection point. The second connection terminal of the first switching unit M1 and the positive terminal of the seventh diode D7 are respectively connected to an uncontrolled rectifier module. The two ends of the first inductor L1 are connected to the first connection point and a high-frequency inverter module, respectively. In this embodiment, the first switching unit M1 includes a freewheeling diode and an IGBT field-effect transistor. The emitter of the IGBT field-effect transistor is the first connection terminal of the first switching unit M1, the collector of the IGBT field-effect transistor is the second connection terminal of the first switching unit M1, and the base of the IGBT field-effect transistor is used to connect to a control chip to receive control signals. The positive terminal of the freewheeling diode is connected to the emitter of the IGBT field-effect transistor, and the negative terminal of the freewheeling diode is connected to the collector of the IGBT field-effect transistor.

[0054] The uncontrolled rectifier module includes a first diode D1, a second diode D2, a third diode D3, a fourth diode D4, a fifth diode D5, and a sixth diode D6. Specifically, the anode of the first diode D1 is connected to the cathode of the fourth diode D4 to form a second connection point; the anode of the second diode D2 is connected to the cathode of the fifth diode D5 to form a third connection point; the anode of the third diode D3 is connected to the cathode of the sixth diode D6 to form a fourth connection point; the cathodes of the first diode D1, the second diode D2, and the third diode D3 are connected together to form a fifth connection point, which is connected to the second connection terminal of the first switching unit M1; the anodes of the fourth diode D4, the fifth diode D5, and the sixth diode D6 are connected together to form a sixth connection point, which is connected to the anode of the seventh diode D7.

[0055] Continue to refer to Figure 1 The induction heating circuit also includes a second inductor L2, a third inductor L3, and a fourth inductor L4. The first output terminal of the three-phase power grid G ​​is phase A, and the two ends of the second inductor L2 are connected to phase A and the second connection point, respectively. The second output terminal of the three-phase power grid G ​​is phase B, and the two ends of the third inductor L3 are connected to phase B and the third connection point, respectively. The third output terminal of the three-phase power grid G ​​is phase C, and the two ends of the fourth inductor L4 are connected to phase C and the fourth connection point, respectively.

[0056] The high-frequency inverter module includes a second switching unit M2, a third switching unit M3, a fourth switching unit M4, a fifth switching unit M5, and a high-frequency transformer T. Specifically, the second connection terminals of the second switching unit M2 and the third switching unit M3 are respectively connected to one end of the first inductor L1 to form a seventh connection point; the first connection terminals of the fourth switching unit M4 and the fifth switching unit M5 are respectively connected to a sixth connection point; the first connection terminal of the second switching unit M2 is connected to the second connection terminal of the fourth switching unit M4 to form an eighth connection point; and the first pin of the high-frequency transformer T is connected to the eighth connection point. Finally, the first connection terminal of the third switching unit M3 is connected to the second connection terminal of the fifth switching unit M5 to form a ninth connection point; and the second pin of the high-frequency transformer T is connected to the ninth connection point.

[0057] The high-frequency inverter module also includes a resonant unit, which consists of an inductor Ls, a resonant capacitor C3, an induction coil Lr, and an equivalent load R. Specifically, the third pin of the high-frequency transformer TT is connected to one end of the inductor Ls, and the other end of the inductor Ls is connected to one end of the resonant capacitor C3 to form the tenth connection point. The other end of the resonant capacitor C3 is connected to the fourth pin of the high-frequency transformer TT to form the eleventh connection point. The two ends of the induction coil Lr are connected to the tenth connection point and one end of the equivalent load R, respectively, and the other end of the equivalent load R is connected to the eleventh connection point.

[0058] In this embodiment, the second switching unit M2, the third switching unit M3, the fourth switching unit M4, and the fifth switching unit M5 each include a switching diode and a MOSFET. Specifically, the MOSFET is an enhancement-mode N-MOS transistor. The source of the MOSFET is the first connection terminal of each switching unit, the drain of the MOSFET is the second connection terminal of each switching unit, and the gate of the MOSFET is the control terminal of each switching unit. The gate of the MOSFET is used to connect to a control chip to receive control signals. The anode of the switching diode is connected to the source of the MOSFET, and the cathode of the switching diode is connected to the drain of the MOSFET.

[0059] The induction heating circuit also includes a first polarity capacitor C1 and a second polarity capacitor C2. The positive terminal of the first polarity capacitor C1 is connected to the fifth connection point, and the negative terminal of the first polarity capacitor C1 is connected to the sixth connection point; the positive terminal of the second polarity capacitor C2 is connected to the seventh connection point, and the negative terminal of the second polarity capacitor C2 is connected to the sixth connection point. Here, the first polarity capacitor C1 and the second polarity capacitor C2 respectively serve as voltage regulators and filters, while the resonant capacitor C3 provides resonance.

[0060] Please see Figure 2 and Figure 3 , Figure 2 This is a flowchart illustrating the automatic detection method for coil matching degree provided in an embodiment of the present invention. Figure 3 This is a schematic diagram illustrating an application scenario of the automatic coil matching degree detection method provided in this embodiment of the invention. The automatic coil matching degree detection method provided in this embodiment of the invention is applied to the induction heating circuit 11. The specific implementation process of this automatic detection method is described in detail below. The method includes steps S110 to S140.

[0061] S110, The control chip 12 is equipped with a data recording module to record the operating data collected by the sampling module 13; the operating data includes the operating frequency and operating power of the induction heating circuit 11.

[0062] Please see Figure 4 In one specific embodiment, the high-frequency induction heating system establishes an association link with the display to realize the transmission of signal and data information. The display is used to display the setting interface, which is preset with a result display module and a test confirmation module.

[0063] Step S110 includes the following steps: S111, preset the frequency range of the high-frequency induction heating system in the control chip 12; S112, if the control chip 12 receives a signal from the user triggering the test confirmation module, drive the induction heating circuit 11 to start running; S113, the control chip 12 drives the induction heating circuit 11 to run for a first duration starting from the highest frequency of the high-frequency induction heating system; S114, if a signal is received that the induction heating circuit 11 has completed the first duration of operation, the sampling module 13 records the running data.

[0064] Since the high-frequency induction heating system is located in the relevant induction heating equipment, the frequency range of the high-frequency induction heating system is the frequency range set by the equipment itself at the factory. This frequency range is fixed. However, the induction coil Lr is customized according to customer requirements. The induction heating circuit 11 has different maximum power points when connected to different induction coils Lr. When using it, the maximum power point of the induction heating circuit 11 needs to be within the frequency range set by the equipment.

[0065] S120, The control chip 12 parses the operating data to adjust the operating frequency of the high-frequency induction heating system.

[0066] Please see Figure 5 In a specific embodiment, step S120 includes the following steps: S121, the control chip 12 receives and parses the operating data to obtain the average power; S122, the frequency change step size of the high-frequency induction heating system is modified according to the average power; the frequency change step size is the difference between the current frequency value and the next frequency value; S123, if a signal is received that the high-frequency induction heating system has completed the frequency change step size modification, the operation is paused for a second duration; S124, the operating frequency of the high-frequency induction heating system is reduced according to the frequency change step size, and then the induction heating circuit 11 is driven to continue operating for the first duration; S125, within the frequency range of the high-frequency induction heating system, when the maximum power point of the induction heating circuit 11 is detected, the induction heating circuit 11 stops operating; the maximum power point is the operating point corresponding to when the average power exceeds the maximum power value of the high-frequency induction heating system.

[0067] In this embodiment, the first duration is set to 20ms, and the second duration is set to 50ms. The control chip 12 drives the induction heating circuit 11 to start operating from the highest frequency of the high-frequency induction heating system. Every 20ms of operation, the circuit pauses for 50ms. During the 50ms pause, the control chip 12 analyzes the operating power of the induction heating circuit 11 to obtain the average power during the 20ms operation period, and reduces the frequency change step size of the high-frequency induction heating system based on the average power. After the 50ms pause ends, the circuit runs for another 20ms, and this cycle continues continuously, recording relevant operating data until the control chip 12 detects the maximum power point of the induction heating circuit 11 before stopping the recording of operating data.

[0068] In one specific embodiment, step S125 is followed by: S126, when the operating frequency of the high-frequency induction heating system drops to its minimum value and the maximum power point of the induction heating circuit 11 is still not detected, the induction heating circuit 11 stops operating. Therefore, if the maximum power point of the induction heating circuit 11 cannot be found within the frequency range of the device, it indicates that the customer's induction coil Lr design is unreasonable and incompatible with the device. In this case, continuing the test is meaningless and the test should be stopped.

[0069] S130, the control chip 12 determines whether the operating power output by the induction heating circuit 11 within the frequency range of the high-frequency induction heating system meets a preset ratio; the preset ratio is the ratio of the operating power of the induction heating circuit 11 to the maximum power value of the high-frequency induction heating system.

[0070] Please see Figure 6 In a specific embodiment, step S130 includes: S131, generating an operation record table based on the operation data; S132, generating a frequency-power curve of the induction heating circuit 11 based on the operation record table; S133, parsing the frequency-power curve to obtain the power status of the induction heating circuit 11 at each operating frequency of the high-frequency induction heating system; S134, determining whether the operating power output by the induction heating circuit 11 within the frequency range of the high-frequency induction heating system meets a preset ratio based on the power status; S135, outputting the determination result in text form and displaying it on the result display module; the display information of the result display module includes the matching result of the induction coil Lr, the maximum power point, and the frequency corresponding to the maximum power point.

[0071] S140. If the preset ratio is met, output the determination result of the induction coil Lr and the high-frequency induction heating system as "matched".

[0072] S150. If the preset ratio is not met, output the judgment result of the induction coil Lr and the high-frequency induction heating system as "mismatch", and output the corresponding debugging prompt information.

[0073] In this embodiment, the frequency step size of the high-frequency induction heating system is limited to 1–18 kHz. The operating frequency of the high-frequency induction heating system in the next operating period is determined using the formula Δω = 18 - 1.7 * P. For example, if the current operating frequency is ω(n) = 450 kHz and the power is 0.4 kW, then Δω = 17.32 kHz. Therefore, the operating frequency of the high-frequency induction heating system in the next operating period is ω(n-1) = 450 - 17.32 = 432.68 kHz. As the operating power of the induction heating circuit 11 increases, the frequency change step size Δω gradually decreases closer to the resonance point. The power value of the induction heating circuit 11 at the maximum power value of the high-frequency induction heating system detected by the control chip 12 will be more accurate. Therefore, the data shown in the following operating record table can be obtained:

[0074] Run log table

[0075] Serial Number Operating frequency (kHz) Operating power P (kW) 1 Fmax (highest frequency) P1 2 Fmax-Δω P2 …… …… P3 N Fmin (lowest frequency) P4

[0076] Please see Figure 7 , Figure 7 This is the frequency-power curve of the induction heating circuit 11. The control chip 12 parses the operation record table and generates the frequency-power curve of the induction heating circuit 11 corresponding to a certain induction coil Lr. Based on the frequency-power curve, the power change of the induction heating circuit 11 connected to a certain induction coil Lr at various operating frequencies of the high-frequency induction heating system can be obtained.

[0077] If the induction heating circuit 11 can output 5% to 100% of the power of the device within the frequency range of the high-frequency induction heating system, it indicates that the induction coil Lr is perfectly matched with the high-frequency induction heating system, that is, the induction coil Lr is matched with the device, and the output judgment result is "matched". The result display module of the display shows "1", and the value of the maximum power point and the value of the frequency corresponding to the maximum power point are also output. If the induction coil Lr is not matched with the device, the output judgment result is "mismatched", and the result display module of the display shows "2". At the same time, the corresponding debugging prompt information is output to inform the customer whether the frequency of the induction heating circuit 11 connected to a certain induction coil Lr is too high or too low, so that the customer can optimize the induction coil Lr.

[0078] For ease of understanding, the monitor's settings interface is as follows: Figure 7As shown, the user can click the "Start Test" button on the settings interface to generate a trigger signal for the test confirmation module. After receiving the trigger signal, the control chip 12 drives the induction heating circuit 11 to start running the test according to the preset frequency range. Taking a 10kVA handheld device as an example, after the test is completed, the control chip 12 generates the following running record table:

[0079]

[0080] In the table above, when the operating frequency of the high-frequency induction heating system is 395.508kHz, the operating power of the induction heating circuit 11 reaches 10.6kW, indicating that the induction heating circuit 11 can operate at full power within the frequency range of the equipment. Therefore, "1" can be displayed in the result display module of the display, with the maximum power point value being 10.6kW and the corresponding frequency value being 395.508KHz.

[0081] The implementation principle of the automatic detection method for the matching degree of a high-frequency induction heating coil according to an embodiment of this application is as follows: This automatic detection method is applied to a high-frequency induction heating system, which includes an induction heating circuit 11, a sampling module 13, and a control chip 12. The output terminal of the induction heating circuit is connected to the induction coil Lr. The induction heating circuit 11 includes a three-phase power grid, an uncontrolled rectifier module, a voltage regulation module, and a high-frequency inverter module. The control chip 12 establishes electrical and communication connections with the induction heating circuit 11 and the sampling module 13 to realize the transmission of signal and data information.

[0082] The control chip 12 has a built-in data recording module to record the operating data collected by the sampling module 13. The control chip 12 analyzes the operating data to adjust the operating frequency of the high-frequency induction heating system. The control chip 12 determines whether the operating power output by the induction heating circuit 11 within the frequency range of the high-frequency induction heating system meets a preset ratio. If the preset ratio is met, the determination result of the output coil and the high-frequency induction heating system is "matched"; if the preset ratio is not met, the determination result of the output coil and the high-frequency induction heating system is "mismatched", and corresponding debugging prompts are output. This automatic detection method can detect whether the induction coil Lr is matched with the induction heating equipment without the need for special measuring tools, thereby assisting customers in better optimizing the induction coil Lr.

[0083] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An automatic detection method for the matching degree of a high-frequency induction heating coil, the automatic detection method being applied to a high-frequency induction heating system, the high-frequency induction heating system comprising an induction heating circuit, a sampling module, and a control chip, wherein the output terminal of the induction heating circuit is connected to the induction coil, and the control chip establishes electrical and communication connections with the induction heating circuit and the sampling module respectively to realize the transmission of signal and data information, characterized in that: The control chip has a built-in data recording module to record the operating data collected by the sampling module, including: the control chip driving the induction heating circuit to run for a first duration starting from the highest frequency of the high-frequency induction heating system; if a signal is received that the induction heating circuit has completed the first duration of operation, the sampling module records the operating data; the operating data includes the operating frequency and operating power of the induction heating circuit; The control chip analyzes the operating data to adjust the operating frequency of the high-frequency induction heating system, including: the control chip receives and analyzes the operating data to obtain an average power; modifies the frequency change step size of the high-frequency induction heating system according to the average power; the frequency change step size is the difference between the current frequency value and the next frequency value; reduces the operating frequency of the high-frequency induction heating system according to the frequency change step size, and then drives the induction heating circuit to continue operating for the first duration; within the frequency range of the high-frequency induction heating system, when the maximum power point of the induction heating circuit is detected, the induction heating circuit stops operating; the maximum power point is the operating point corresponding to when the average power exceeds the maximum power value of the high-frequency induction heating system. The control chip determines whether the operating power output by the induction heating circuit within the frequency range of the high-frequency induction heating system meets a preset ratio; the preset ratio is the ratio of the operating power of the induction heating circuit to the maximum power value of the high-frequency induction heating system. If the preset ratio is met, the result of the determination of the induction coil and the high-frequency induction heating system is "matched". If the preset ratio is not met, the result of the determination of the induction coil and the high-frequency induction heating system is "mismatched", and the corresponding debugging prompt information is output.

2. The automatic detection method for the matching degree of a high-frequency induction heating coil according to claim 1, characterized in that, After the step of modifying the frequency change step size of the high-frequency induction heating system based on the average power, the method further includes: If a signal is received that the high-frequency induction heating system has completed the frequency change step size modification, the second operation is paused.

3. The automatic detection method for the matching degree of a high-frequency induction heating coil according to claim 1, characterized in that, After the step of stopping the induction heating circuit when the maximum power point of the induction heating circuit is detected within the frequency range of the high-frequency induction heating system, the method further includes: When the operating frequency of the high-frequency induction heating system drops to its minimum value, and the maximum power point of the induction heating circuit is still not detected, the induction heating circuit stops operating.

4. The automatic detection method for the matching degree of a high-frequency induction heating coil according to claim 1, wherein the high-frequency induction heating system establishes an association link with a display to realize the transmission of signal and data information, the display is used to display a setting interface, and the setting interface is preset with a result display module and a test confirmation module, characterized in that, Before the step of the control chip driving the induction heating circuit to run for a first duration from the highest frequency of the high-frequency induction heating system, the method further includes: The frequency range of the high-frequency induction heating system is preset within the control chip. If the control chip receives a signal from the user that triggers the test confirmation module, it drives the induction heating circuit to start running.

5. The automatic detection method for the matching degree of a high-frequency induction heating coil according to claim 4, characterized in that, The step of the control chip determining whether the operating power output by the induction heating circuit within the frequency range of the high-frequency induction heating system meets a preset ratio includes: Generate an operation record table based on the operation data; Generate the frequency-power curve of the induction heating circuit based on the operation record table; The power of the induction heating circuit at various operating frequencies of the high-frequency induction heating system can be obtained by analyzing the frequency-power curve. Based on the power conditions, determine whether the operating power output by the induction heating circuit within the frequency range of the high-frequency induction heating system meets the preset ratio.

6. The automatic detection method for the matching degree of a high-frequency induction heating coil according to claim 5, characterized in that, After the step of determining whether the operating power output by the induction heating circuit within the frequency range of the high-frequency induction heating system meets the preset ratio based on the power condition, the method further includes: The judgment result is output as text and displayed in the result display module; the display information of the result display module includes the induction coil matching result, the maximum power point and the frequency corresponding to the maximum power point.

7. The automatic detection method for the matching degree of a high-frequency induction heating coil according to claim 1, characterized in that, The preset ratio is 5% to 100%.

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