Iron core pairing method and device suitable for winding device
By loading the reference excitation signal to the iron core to be paired, calculating the response reference phase difference and integral square error, screening and matching the iron core, the problems of low efficiency and poor reliability of the existing iron core pairing methods are solved, and efficient and reliable iron is achieved Core pairing.
Patent Information
- Application Number
- CN202411951995.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-27
- Publication Date
- 2025-02-18
AI Technical Summary
The existing iron core pairing method relies on the experience of testers, which can easily cause misjudgment and lead to low pairing efficiency.
By providing the iron core group to be paired and the reference excitation source signal, loading the reference excitation signal to the iron core to be paired, obtaining the reference excitation sampling signal and the excitation response signal, calculating the response reference phase difference and the integral square error of the response signal, filtering and matching the core .
It improves the efficiency and reliability of iron core pairing, reduces the possibility of human misjudgment, and achieves more accurate and efficient iron core pairing.
Smart Images
Figure CN119480421A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to a core pairing method and a device, in particular to a core pairing method and a device suitable for winding components. Background Art
[0002] For winding devices such as current sensors with windings, the performance of the core is crucial, and in particular, the performance consistency of the core also has an important impact on the performance of the winding device. In order to ensure that the core used in the winding device has consistent performance, the cores generally need to be paired so that cores with consistent performance can be selected after pairing.
[0003] Generally speaking, when pairing batches of cores, the traditional method is: fix one core to be tested, then select one from the remaining cores in order for pairing test, observe the waveform through an oscilloscope, and if the waveforms are highly similar, the pairing is successful.
[0004] From the above description of the existing core pairing, it can be seen that the current pairing method relies on the experience of the tester, which is prone to misjudgment. In order to find a winding core with the closest performance in a batch of cores, it is necessary to complete the matching test of any pair of cores, which will result in low pairing efficiency. Summary of the invention
[0005] The purpose of the present invention is to overcome the deficiencies in the prior art and to provide a core pairing method and device suitable for winding components, which can effectively achieve core pairing and improve the efficiency and reliability of core pairing.
[0006] According to the technical solution provided by the present invention, a core pairing method suitable for winding components comprises:
[0007] Providing a core group to be paired and a reference excitation source signal adapted to the core group to be paired, wherein the core group to be paired includes at least two cores to be paired;
[0008] For each to-be-paired iron core in the to-be-paired iron core group, a reference excitation source signal is loaded onto the to-be-paired iron core, and a reference excitation sampling signal corresponding to the reference excitation source signal and an excitation response signal of the to-be-paired iron core under the reference excitation source signal are obtained, and thereafter, a response reference phase difference of the current to-be-paired iron core is determined based on the reference excitation sampling signal and the corresponding excitation response signal;
[0009] Each to-be-paired core is sequentially used as a reference paired core, and the remaining to-be-paired cores in the to-be-paired core group are respectively used as the to-be-selected paired cores, and the to-be-selected paired cores are paired and screened based on the response reference phase difference corresponding to the reference paired core and the to-be-selected paired core, so as to generate a reference selectable paired core group after pairing screening, wherein,
[0010] During pairing screening, when the response reference phase difference of the paired core to be selected matches the response reference phase difference of the reference paired core, the paired core to be selected is configured as an optional paired core.
[0011] A reference optional core group generated by pairing screening, wherein the reference optional paired core group includes a reference paired core and a plurality of optional paired cores;
[0012] For any reference optional paired core group including optional paired cores, the integrated square error of the response signal between each optional paired core and the reference paired core is calculated, and the optional paired core that is better paired with the reference paired core is determined based on all the integrated square errors of the response signals.
[0013] The reference excitation sampling signal is a periodic waveform signal, wherein the waveform state of the periodic waveform signal includes a triangle wave, a sine wave or a square wave;
[0014] When the reference excitation source signal is loaded onto the iron core to be paired, the reference excitation sampling signal is loaded onto the first end of the coil of the iron core to be paired.
[0015] Signal sampling is performed on the first end of the coil of the paired iron core to obtain a reference excitation sampling signal after the signal sampling, and at the same time, signal sampling is performed on the second end of the coil of the paired iron core to obtain an excitation response signal after the signal sampling.
[0016] When the waveform state of the reference excitation sampling signal is a waveform with an obvious peak, when determining the response reference phase difference of the current core to be paired, we have:
[0017]
[0018] Among them, PD is the response reference phase difference, N2 is the sampling number corresponding to the peak value of the excitation response signal, N1 is the sampling number corresponding to the peak value of the reference excitation sampling signal, Fs is the sampling frequency for sampling the reference excitation source signal, and f is the frequency of the excitation response signal / reference excitation sampling signal.
[0019] After obtaining the excitation response signal, when determining the frequency f of the excitation response signal, we have:
[0020] Perform FFT transformation on the stimulus response signal to generate a stimulus response spectrum signal after FFT transformation; determine the frequency f of the stimulus response signal based on the stimulus response spectrum signal, and then:
[0021]
[0022] Wherein, N is the number of sampling points of FFT transformation, and maxindex is the serial number corresponding to the maximum value of the spectrum modulus value determined based on the excitation response spectrum signal search.
[0023] When providing a reference stimulus signal, it includes:
[0024] An excitation signal generator is provided, the excitation signal generator is connected through a power amplifier and a signal conditioning unit, and is connected to the first end of the coil of the iron core to be paired through the signal conditioning unit, wherein:
[0025] The excitation signal generator generates a triangular wave signal, and the generated triangular wave signal is generated into a reference excitation source signal loaded onto the first end of the iron core coil to be paired after passing through a power amplifier and a signal conditioning unit.
[0026] When screening for pairs, include:
[0027] Calculate the phase difference difference between the selected paired iron core and the reference paired iron core corresponding to the response reference phase difference;
[0028] The calculated phase difference value is compared with the phase difference threshold. When the calculated phase difference value matches the phase difference threshold, the response reference phase difference of the paired iron core to be selected is adapted to the response reference phase difference of the reference paired iron core.
[0029] When calculating the integrated square error of the response signal, include:
[0030] For the excitation response signal of the optional paired iron core and the excitation response signal of the reference paired iron core, at least a positive half-cycle response signal of the corresponding excitation response signal is obtained;
[0031] Performing integral normalization processing on the corresponding positive half-cycle response signals of the optional paired iron core and the reference paired iron core, so as to generate corresponding integral normalized positive half-cycle response signals respectively after the integral normalization processing;
[0032] The integral normalized positive half-cycle response signals corresponding to the optional paired iron core and the reference paired iron core are subjected to an integral square error calculation to generate a corresponding response signal integral square error after the integral square error calculation.
[0033] When calculating the integrated square error, we have:
[0034]
[0035] Where ISEmn is the integrated square error of the response signal, Fs is the sampling frequency of the reference excitation sampling signal, M is the number of sampling points contained in the positive half-cycle response signal, ns nj is the jth integral normalized value in the integral normalized positive half-cycle response signal of the optional paired core, ns mj It is the jth integrated normalized value in the integrated normalized positive half-cycle response signal of the reference paired core.
[0036] For any reference optional paired core set that includes optional paired cores, then:
[0037] The integrated square error of the response signal that is not greater than the integrated square error threshold is used as the integrated square error of the response signal to be selected;
[0038] For all the candidate response signal integrated square errors, the optional paired iron core corresponding to the smallest candidate response signal integrated square error is determined, and the optional paired iron core is used as the optional paired iron core that is preferably paired with the reference paired iron core.
[0039] A core pairing device suitable for winding components at least comprises a core pairing processing unit, wherein the core pairing processing unit uses the core pairing method described above to perform core pairing on a core group to be paired, so as to determine two paired cores to be paired after the cores are paired.
[0040] The advantages of the present invention are as follows: for each to-be-paired core in the to-be-paired core group, the response reference phase difference of each to-be-paired core is determined, and then the to-be-paired cores can be paired and screened according to the response reference phase difference, so that a reference optional paired core group can be obtained after the pairing and screening. After obtaining the reference optional paired core group, the response signal integral square error can be calculated, and then the pairing state of the reference paired core and the optional paired core can be determined according to the response signal integral square error, thereby realizing core pairing and improving the efficiency and reliability of core pairing. BRIEF DESCRIPTION OF THE DRAWINGS
[0041] Figure 1 The figure is a schematic diagram of a process flow of an embodiment of core pairing of the present invention.
[0042] Figure 2 The figure is a schematic structural diagram of an embodiment of the core pairing of the present invention.
[0043] Figure 3 A schematic diagram of an embodiment of a reference excitation sampling signal and an excitation response signal of the present invention.
[0044] Explanation of the reference numerals: 1-excitation signal generator, 2-core pairing processing unit. DETAILED DESCRIPTION
[0045] The present invention will be further described below in conjunction with specific drawings and embodiments.
[0046] In order to effectively realize core pairing and improve the efficiency and reliability of core pairing, the present invention provides a core pairing method suitable for winding components. Specifically, the core pairing method includes:
[0047] Providing a core group to be paired and a reference excitation source signal adapted to the core group to be paired, wherein the core group to be paired includes at least two cores to be paired;
[0048] For each to-be-paired iron core in the to-be-paired iron core group, a reference excitation source signal is loaded onto the to-be-paired iron core, and a reference excitation sampling signal corresponding to the reference excitation source signal and an excitation response signal of the to-be-paired iron core under the reference excitation source signal are obtained, and thereafter, a response reference phase difference of the current to-be-paired iron core is determined based on the reference excitation sampling signal and the corresponding excitation response signal;
[0049] Each to-be-paired core is sequentially used as a reference paired core, and the remaining to-be-paired cores in the to-be-paired core group are respectively used as the to-be-selected paired cores, and the to-be-selected paired cores are paired and screened based on the response reference phase difference corresponding to the reference paired core and the to-be-selected paired core, so as to generate a reference selectable paired core group after pairing screening, wherein,
[0050] During pairing screening, when the response reference phase difference of the paired core to be selected matches the response reference phase difference of the reference paired core, the paired core to be selected is configured as an optional paired core.
[0051] A reference optional core group generated by pairing screening, wherein the reference optional paired core group includes a reference paired core and a plurality of optional paired cores;
[0052] For any reference optional paired core group including optional paired cores, the integrated square error of the response signal between each optional paired core and the reference paired core is calculated, and the optional paired core that is better paired with the reference paired core is determined based on all the integrated square errors of the response signals.
[0053] Figure 1 A flow chart of an embodiment of the core pairing of the present invention is shown in the figure. It can be seen from the figure that when pairing the cores, a core group to be paired should be provided. The core group to be paired generally includes at least two cores to be paired. The number of cores to be paired in the core group to be paired can be selected as needed to meet the actual core pairing requirements. When the core group to be paired is provided, the cores to be paired in the core group to be paired are paired. Therefore, the core pairing of the present invention specifically refers to pairing the cores to be paired in the core group to be paired. The purpose of core pairing can be consistent with the prior art. In addition, the winding device of the present invention may include devices such as current sensors using windings, and the type of winding device can be selected as needed.
[0054] In one embodiment of the present invention, a corresponding reference excitation source signal should be provided according to the type of the core group to be paired and the operating parameters. It can be understood that when the cores are paired, the reference excitation source signal should be loaded into each core to be paired. After the reference excitation source signal is loaded into the core to be paired, the excitation response signal can be sampled. Of course, the reference excitation source signal should also be sampled at the same time so that the reference excitation sampling signal can be obtained after the signal sampling.
[0055] In one embodiment of the present invention, the reference excitation sampling signal is a periodic waveform signal, wherein the waveform state of the periodic waveform signal includes a triangle wave, a sine wave or a square wave;
[0056] When the reference excitation source signal is loaded onto the iron core to be paired, the reference excitation sampling signal is loaded onto the first end of the coil of the iron core to be paired.
[0057] Signal sampling is performed on the first end of the coil of the paired iron core to obtain a reference excitation sampling signal after the signal sampling, and at the same time, signal sampling is performed on the second end of the coil of the paired iron core to obtain an excitation response signal after the signal sampling.
[0058] Figure 2 An embodiment of loading a reference excitation source signal to a core to be paired is shown in FIG. Figure 2 In the figure, T1 is the iron core to be paired, the upper end of the iron core to be paired is the first end of the iron core coil to be paired, and the second end of the iron core coil to be paired is grounded through the resistor R1. After the reference excitation source signal is loaded to the first end of the iron core coil to be paired, the first end and the second end of the iron core coil to be paired are sampled at the same time, so that the reference excitation sampling signal and the excitation response signal can be obtained at the same time after the signal sampling.
[0059] Figure 2 In the embodiment, the reference excitation source signal is sampled and analog-to-digital converted by the ADC1 unit, and the second end of the paired core coil is sampled and analog-to-digital converted by the ADC2 unit. The ADC1 unit and the ADC2 unit can adopt the existing commonly used analog-to-digital conversion form, which can be selected according to needs.
[0060] It should be noted that the reference excitation sampling signal is a periodic waveform signal, and the waveform state of the periodic waveform signal includes a triangular wave, a sine wave or a square wave. For example, the reference excitation sampling signal can be a triangular wave. At this time, the reference excitation source signal is generally also a triangular wave signal, that is, the waveform state of the reference excitation sampling signal is consistent with the waveform state of the reference excitation source signal. According to the working requirements of the winding device, the performance requirements of the core to be paired can be determined. The amplitude of the reference excitation source signal is 1 to 15V, and the frequency is adjustable from 10 to 1000Hz. When the cores are paired, for the cores to be paired in the same group of cores to be paired, the reference excitation source signal loaded to each core to be paired is kept consistent.
[0061] Figure 3 An embodiment of a reference excitation sampling signal and a plurality of excitation response signals is shown in FIG. Figure 3 In the figure, CH0 is the reference excitation sampling signal, and the waveform state of the reference excitation sampling signal is a triangle wave, and CH1 to CH20 are all excitation response signals.
[0062] It can be seen from the above description that when the cores are paired, for each core to be paired, the reference excitation sampling signal and the excitation response signal corresponding to each core to be paired should be obtained one by one, wherein the reference excitation sampling signal and the excitation response signal are obtained, and the response reference phase difference of each core to be paired can be calculated. The following example illustrates the case of calculating the response reference phase difference.
[0063] In one embodiment of the present invention, when the waveform state of the reference excitation sampling signal is a waveform with an obvious peak, when determining the response reference phase difference of the current core to be paired, then:
[0064]
[0065] Among them, PD is the response reference phase difference, N2 is the sampling number corresponding to the peak value of the excitation response signal, N1 is the sampling number corresponding to the peak value of the reference excitation sampling signal, Fs is the sampling frequency for sampling the reference excitation source signal, and f is the frequency of the excitation response signal / reference excitation sampling signal.
[0066] It can be seen from the above description that the excitation response signal and the reference excitation sampling signal are both time domain signals and are generated after sampling. Specifically, the sampling frequencies of the reference excitation sampling signal and the excitation response signal are the same, which are both sampling frequencies Fs. When the reference excitation source signal is sampled to generate the reference excitation sampling signal, at least one waveform period of the reference excitation source signal is sampled, that is, the reference excitation sampling signal includes at least one waveform period of the sampling value of the reference excitation source signal.
[0067] It can be seen from the above description that the waveform state of the reference excitation sampling signal is a waveform with a clear peak, which can be a waveform state such as a triangle wave or a sine wave. At this time, the waveform state of the reference excitation sampling signal cannot be a square wave. When the waveform state of the reference excitation sampling signal is a square wave, the corresponding response reference phase difference can be calculated according to the commonly used method in the technical field. The method and process of calculating the response reference phase difference can be consistent with the prior art and will not be repeated here.
[0068] For the sampled excitation response signal, the peak value of the excitation response signal and the sampling number N2 corresponding to the peak value can be determined. Similarly, the peak value of the reference excitation sampling signal and the sampling number N1 corresponding to the peak value can be determined, wherein the peak value here can generally be a positive maximum value. |N2-N1| is the absolute value of the corresponding difference between the sampling number N2 and the sampling number N1. Generally, the frequency of the excitation response signal is substantially the same as the frequency of the reference excitation sampling signal. The following takes the frequency of the excitation response signal calculated as an example to illustrate the method of calculating the frequency.
[0069] In one embodiment of the present invention, after obtaining the excitation response signal, when determining the frequency f of the excitation response signal, we have:
[0070] Perform FFT transformation on the stimulus response signal to generate a stimulus response spectrum signal after FFT transformation; determine the frequency f of the stimulus response signal based on the stimulus response spectrum signal, and then:
[0071]
[0072] Wherein, N is the number of sampling points of FFT transformation, and maxindex is the serial number corresponding to the maximum value of the spectrum modulus value determined based on the stimulus response spectrum signal search.
[0073] Specifically, when the excitation response signal is subjected to FFT (Fast Fourier Transform), the number of sampling points of the FFT transformation can be N, and N is generally an even number. After the N sampling points are subjected to FFT transformation, N transformation result values can be obtained, that is, the excitation response spectrum signal can include N spectrum values, and the spectrum values are generally complex numbers. At this time, the excitation response spectrum signal can be recorded as a set Z = {c[0], ... c[N-1]}, and the set Q = {q[0], ..., q[N-1]} is obtained by taking the modulus of the elements of the set Z. Since the frequency spectrum obtained after the FFT transformation is symmetrical, it is only necessary to compare the values of the first N / 2 elements of the set Q to obtain the maximum value of the element and the sequence number of the maximum value of the element, and this sequence number is recorded as maxindex.
[0074] It is understandable that the frequency of the reference excitation sampling signal can be calculated in the above manner. The specific calculation process can refer to the above description and will not be repeated here. In specific implementation, only the frequency of the reference excitation sampling signal or the excitation response signal can be calculated.
[0075] For each core to be paired, the corresponding reference phase difference of the response of each core to be paired can be calculated. Since the core group to be paired includes multiple cores to be paired, in order to determine the pairing state of each core to be paired, each core to be paired should be used as a reference pairing core in turn, and then the remaining cores to be paired in the core group to be paired can be used as selected pairing cores. For example, when the core group to be paired includes 10 cores to be paired, one core to be paired is used as the reference pairing core, and the remaining 9 cores to be paired are used as selected pairing cores. That is, after selecting a core to be paired as the reference pairing core, the corresponding selected pairing core can be obtained.
[0076] After determining the reference paired core and the corresponding paired core to be selected, the paired core to be selected can be paired and screened based on the reference paired core and the response reference phase difference corresponding to the paired core to be selected, wherein during the pairing screening, when the response reference phase difference of the paired core to be selected matches the response reference phase difference of the reference paired core, the paired core to be selected is configured as an optional paired core, and a reference optional paired core group can be formed based on the reference paired core and the corresponding optional paired core. It can be understood that if the response reference phase difference of a paired core to be selected cannot match the response reference phase difference of the reference paired core, the paired core to be selected should not be used as an optional paired core.
[0077] It is understandable that, in order to distinguish different cores to be paired, the cores to be paired in the core group to be paired can be numbered or coded, so that the identity of each core to be paired can be characterized by the number or code, and then the corresponding identity information of the reference paired core and the optional paired core can be determined. The method of numbering or coding the cores to be paired can be consistent with the prior art and will not be repeated here.
[0078] In one embodiment of the present invention, the pairing screening includes:
[0079] Calculate the phase difference difference between the selected paired iron core and the reference paired iron core corresponding to the response reference phase difference;
[0080] The calculated phase difference value is compared with the phase difference threshold. When the calculated phase difference value matches the phase difference threshold, the response reference phase difference of the paired iron core to be selected is adapted to the response reference phase difference of the reference paired iron core.
[0081] It should be noted that calculating the phase difference difference of the corresponding response reference phase difference of the paired core to be selected and the reference paired core specifically refers to calculating the absolute value of the difference between the response reference phase difference of the paired core to be selected and the response reference phase difference of the reference paired core. After the phase difference value is calculated, the phase difference difference value can be compared with the phase difference threshold. Generally, the phase difference threshold can be set to 3°. Of course, the phase difference threshold can also be other values, which are based on the requirements of core pairing.
[0082] When the phase difference threshold can be set to 3°, when the calculated phase difference value matches the phase difference threshold, generally: the phase difference value is not greater than 3. Therefore, when the phase difference value does not exceed 3, the paired core to be selected can be used as an optional paired core. Of course, other pairing screening methods can also be used, which will not be illustrated one by one here.
[0083] The above method is used to generate a reference optional paired core group, and the reference optional paired core group may include at least a reference paired core, and the number of optional paired cores in the reference optional paired core may be 0 or another number, which is specifically related to the pairing screening result between the reference paired cores. It can be understood that after pairing screening is performed in the above method, a corresponding reference optional paired core group can be obtained, wherein the number of the reference optional paired core group is consistent with the number of the to-be-paired cores in the to-be-paired core group.
[0084] Since the reference optional paired core group may not include the optional paired core, when the reference optional paired core group does not include the optional paired core group, it indicates that there is no core that can be paired with the current reference paired core. Only when the optional paired core group includes the optional paired core, subsequent pairing processing is required.
[0085] In one embodiment of the present invention, for any reference optional paired core group including optional paired cores, the response signal integral square error of each optional paired core and the reference paired core is calculated, and the optional paired core that is preferably paired with the reference paired core is determined based on all the response signal integral square errors. The method of calculating the response signal integral square error and determining the optional paired core that is preferably paired is specifically described below.
[0086] In one embodiment of the present invention, when calculating the response signal integrated square error, it includes:
[0087] For the excitation response signal of the optional paired iron core and the excitation response signal of the reference paired iron core, at least a positive half-cycle response signal of the corresponding excitation response signal is obtained;
[0088] Performing integral normalization processing on the corresponding positive half-cycle response signals of the optional paired iron core and the reference paired iron core, so as to generate corresponding integral normalized positive half-cycle response signals respectively after the integral normalization processing;
[0089] The integral normalized positive half-cycle response signals corresponding to the optional paired iron core and the reference paired iron core are subjected to an integral square error calculation to generate a corresponding response signal integral square error after the integral square error calculation.
[0090] It can be seen from the above description that when the reference excitation source signal is a triangular wave signal, in order to improve the efficiency of calculating the integrated square error of the response signal, only the positive half-cycle response signal of the excitation response signal can be used, that is, the positive half-cycle response signal of the optional paired iron core and the positive half-cycle response signal of the reference paired iron core are obtained. The method of obtaining the corresponding positive half-cycle response signal can be consistent with the prior art, and no examples are given here.
[0091] The positive half-cycle response signal of the optional paired core and the positive half-cycle response signal of the reference paired core should be subjected to integral normalization processing. The integral normalization processing of the positive half-cycle response signal of the optional paired core is described below as an example. Specifically:
[0092] The positive half-cycle response signal of the optional paired core can be recorded as: S = [s1, s2…s M ], where S is the positive half-cycle response signal of the optional paired core, s1 is the first sampling value of the positive half-cycle response signal, s2 is the first sampling value of the positive half-cycle response signal, and s M is the Mth sampling value of the positive half-cycle response signal, M is the number of sampling points of the positive half-cycle response signal, M = Fs / 2f;
[0093] Integrating the positive half-cycle response signal of the optional paired core, we have: Wherein, I is the integral value of the positive half-cycle response signal of the optional paired core.
[0094] After the integral value is calculated, the calculated integral value can be used to perform integral value normalization processing on the positive half-cycle response signal of the optional paired core, and the obtained integral normalized positive half-cycle response signal can be:
[0095] NS=[ns1,ns2…ns M ]
[0096] Where NS is the integral normalized positive half-cycle response signal, and ns1 can be ns2,ns M The corresponding calculation process can be found in the description of ns1 here.
[0097] After the integral normalized positive half-cycle response signals corresponding to the optional paired core and the reference paired core are calculated, the integral square error calculation may be performed. In one embodiment of the present invention, when the integral square error calculation is performed, the following is obtained:
[0098]
[0099] Where ISEmn is the integrated square error of the response signal, Fs is the sampling frequency of the reference excitation sampling signal, M is the number of sampling points contained in the positive half-cycle response signal, nsnj is the jth integral normalized value in the integral normalized positive half-cycle response signal of the optional paired core, ns mj It is the jth integrated normalized value in the integrated normalized positive half-cycle response signal of the reference paired core.
[0100] In specific implementation, ns n1 That is, ns1,ns of the above-mentioned integral normalized positive half-cycle response signal nj 、ns mj The corresponding value can be found here ns n1 The descriptions are not listed one by one here.
[0101] In one embodiment of the present invention, for any reference optional paired core group including optional paired cores, there are:
[0102] The integrated square error of the response signal that is not greater than the integrated square error threshold is used as the integrated square error of the response signal to be selected;
[0103] For all the candidate response signal integrated square errors, the optional paired iron core corresponding to the smallest candidate response signal integrated square error is determined, and the optional paired iron core is used as the optional paired iron core that is preferably paired with the reference paired iron core.
[0104] When the reference optional paired core group includes the optional paired core, the corresponding response signal integrated square error can be calculated by the above description. It can be understood that the number of the calculated response signal integrated square errors is 1 or more. Thereafter, the response signal integrated square errors corresponding to the current reference optional paired core group are compared with the integrated square error threshold, wherein the response signal integrated square error not greater than the integrated square error threshold can be used as the response signal integrated square error to be selected, and the integrated square error threshold can be 0.08. Of course, the integrated square error threshold can also be other values, which can be selected according to needs.
[0105] For all the integrated square errors of the response signals to be selected, the optional paired core corresponding to the smallest integrated square error of the response signal to be selected is determined, and thereafter, the optional paired core can be used as an optional paired core that is preferably paired with the reference paired core. It should be noted that the smaller the integrated square error of the response signal to be selected, the higher the degree of matching between the response signals of the optional paired core and the reference paired core, thereby reflecting that the performance consistency of the current optional paired core and the reference paired core is better.
[0106] In addition, the integrated square errors of all candidate response signals can be arranged in order from small to large and then output for the staff to record or further select.
[0107] From the above description, it can be seen that a core pairing device suitable for winding components can be obtained, specifically, comprising at least a core pairing processing unit 2, wherein, for the core group to be paired, the core pairing processing unit 2 adopts the core pairing method described above to perform core pairing, so as to determine two paired cores to be paired after the core pairing.
[0108] From the above description, it can be seen that when performing core pairing, a reference excitation source signal should be provided. Figure 2 An embodiment of providing a reference excitation source signal is shown in FIG. Specifically, when providing a reference excitation source signal, the method includes:
[0109] An excitation signal generator 1 is provided, wherein the excitation signal generator 1 is connected via a power amplifier and a signal conditioning unit, and is connected via the signal conditioning unit to a first end of a coil of an iron core to be paired, wherein:
[0110] The excitation signal generator 1 generates a triangular wave signal, and the generated triangular wave signal is generated into a reference excitation source signal loaded onto the first end of the iron core coil to be paired after passing through a power amplifier and a signal conditioning unit.
[0111] It should be understood that the excitation signal generator 1 can adopt an existing commonly used form, specifically based on the ability to generate a triangular wave signal. Figure 2 In the figure, PA is a power amplifier, the output end of the excitation signal generator 1 is connected to the output end of the power amplifier, the power amplifier amplifies the power of the triangular wave signal, and then uses the signal conditioning unit to condition it.
[0112] Figure 2 An embodiment of a signal conditioning unit is shown in FIG. 1 . In the figure, the signal conditioning unit may include one or more signal conditioning branches, each of which may include a conditioning switch and a conditioning capacitor connected in series with a conditioning resistor. Figure 2 In the figure, K1 and Kn are the corresponding conditioning switches, C1 and Cn are the corresponding conditioning capacitors. The conditioning switch K1 and the conditioning capacitor C1 form a signal conditioning branch. The conditions of other conditioning branches can be referred to Figure 2 When working, generally one signal conditioning branch can be selected, and then the signal isolation and filtering can be performed by the conditioning capacitor of the selected signal conditioning branch.
[0113] In specific implementation, the core pairing processing unit 2 can be a computer, and the type of the core pairing processing unit 2 can be selected according to needs, so as to be able to perform the core pairing processing described above. Generally, the core pairing processing unit 2 can also control the working state of the excitation signal generator 1, and of course, can also perform gating state control on the signal conditioning branch of the signal conditioning unit.
[0114] It can be understood that the reference excitation sampling signal and the excitation response signal after sampling and conversion by the ADC1 unit and the ADC2 unit are transmitted to the core pairing processing unit 2. Thereafter, the core pairing processing unit 2 can perform pairing processing according to the above-mentioned core pairing processing method. The specific pairing processing method and process can refer to the above description and will not be repeated here.
[0115] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
Claims
1. A core pairing method suitable for winding components, characterized in that: The core pairing method comprises: Providing a core group to be paired and a reference excitation source signal adapted to the core group to be paired, wherein the core group to be paired includes at least two cores to be paired; For each to-be-paired iron core in the to-be-paired iron core group, a reference excitation source signal is loaded onto the to-be-paired iron core, and a reference excitation sampling signal corresponding to the reference excitation source signal and an excitation response signal of the to-be-paired iron core under the reference excitation source signal are obtained, and thereafter, a response reference phase difference of the current to-be-paired iron core is determined based on the reference excitation sampling signal and the corresponding excitation response signal; Each to-be-paired core is sequentially used as a reference paired core, and the remaining to-be-paired cores in the to-be-paired core group are respectively used as the to-be-selected paired cores, and the to-be-selected paired cores are paired and screened based on the response reference phase difference corresponding to the reference paired core and the to-be-selected paired core, so as to generate a reference selectable paired core group after pairing screening, wherein, During pairing screening, when the response reference phase difference of the paired core to be selected matches the response reference phase difference of the reference paired core, the paired core to be selected is configured as an optional paired core. A reference optional core group generated by pairing screening, wherein the reference optional paired core group includes a reference paired core and a plurality of optional paired cores; For any reference optional paired core group including optional paired cores, the integrated square error of the response signal between each optional paired core and the reference paired core is calculated, and the optional paired core that is better paired with the reference paired core is determined based on all the integrated square errors of the response signals.
2. The core pairing method suitable for winding components according to claim 1, characterized in that: The reference excitation sampling signal is a periodic waveform signal, wherein the waveform state of the periodic waveform signal includes a triangle wave, a sine wave or a square wave; When the reference excitation source signal is loaded onto the iron core to be paired, the reference excitation sampling signal is loaded onto the first end of the coil of the iron core to be paired. Signal sampling is performed on the first end of the coil of the paired iron core to obtain a reference excitation sampling signal after the signal sampling, and at the same time, signal sampling is performed on the second end of the coil of the paired iron core to obtain an excitation response signal after the signal sampling.
3. The core pairing method suitable for winding components according to claim 2, characterized in that: When the waveform state of the reference excitation sampling signal is a waveform with an obvious peak, when determining the response reference phase difference of the current core to be paired, we have: Among them, PD is the response reference phase difference, N2 is the sampling number corresponding to the peak value of the excitation response signal, N1 is the sampling number corresponding to the peak value of the reference excitation sampling signal, Fs is the sampling frequency for sampling the reference excitation source signal, and f is the frequency of the excitation response signal / reference excitation sampling signal.
4. The core pairing method suitable for winding components according to claim 3, characterized in that: After obtaining the excitation response signal, when determining the frequency f of the excitation response signal, we have: Performing FFT transformation on the stimulus response signal to generate a stimulus response spectrum signal after the FFT transformation; Based on the excitation response spectrum signal, the frequency f of the excitation response signal is determined, and then: Wherein, N is the number of sampling points of FFT transformation, and maxindex is the serial number corresponding to the maximum value of the spectrum modulus value determined based on the excitation response spectrum signal search.
5. The core pairing method suitable for winding components according to claim 2, characterized in that: When providing a reference stimulus signal, it includes: An excitation signal generator is provided, the excitation signal generator is connected through a power amplifier and a signal conditioning unit, and is connected to the first end of the coil of the iron core to be paired through the signal conditioning unit, wherein: The excitation signal generator generates a triangular wave signal, and the generated triangular wave signal is generated into a reference excitation source signal loaded onto the first end of the iron core coil to be paired after passing through a power amplifier and a signal conditioning unit.
6. The core pairing method suitable for winding components according to claim 1, characterized in that: When screening for pairs, include: Calculate the phase difference difference between the selected paired iron core and the reference paired iron core corresponding to the response reference phase difference; The calculated phase difference value is compared with the phase difference threshold. When the calculated phase difference value matches the phase difference threshold, the response reference phase difference of the paired iron core to be selected is adapted to the response reference phase difference of the reference paired iron core.
7. The core pairing method suitable for winding components according to claim 2, characterized in that: When calculating the integrated square error of the response signal, include: For the excitation response signal of the optional paired iron core and the excitation response signal of the reference paired iron core, at least a positive half-cycle response signal of the corresponding excitation response signal is obtained; Performing integral normalization processing on the corresponding positive half-cycle response signals of the optional paired iron core and the reference paired iron core, so as to generate corresponding integral normalized positive half-cycle response signals respectively after the integral normalization processing; The integral normalized positive half-cycle response signals corresponding to the optional paired iron core and the reference paired iron core are subjected to an integral square error calculation to generate a corresponding response signal integral square error after the integral square error calculation.
8. The core pairing method for winding components according to claim 7, characterized in that: When calculating the integrated square error, we have: Where ISEmn is the integrated square error of the response signal, Fs is the sampling frequency of the reference excitation sampling signal, M is the number of sampling points contained in the positive half-cycle response signal, ns nj is the jth integral normalized value in the integral normalized positive half-cycle response signal of the optional paired core, ns mj It is the jth integrated normalized value in the integrated normalized positive half-cycle response signal of the reference paired core.
9. The core pairing method for winding components according to any one of claims 1 to 8, characterized in that: For any reference optional paired core set that includes optional paired cores, then: The integrated square error of the response signal that is not greater than the integrated square error threshold is used as the integrated square error of the response signal to be selected; For all the candidate response signal integrated square errors, the optional paired iron core corresponding to the smallest candidate response signal integrated square error is determined, and the optional paired iron core is used as the optional paired iron core that is preferably paired with the reference paired iron core.
10. A core pairing device suitable for a winding device, characterized in that: At least includes a core pairing processing unit, wherein, for the core group to be paired, the core pairing processing unit adopts the core pairing method described in any one of claims 1 to 9 to perform core pairing, so as to determine two paired cores to be paired after the core pairing.