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CN114154336B - Method for screening iron core based on loss value simulation test - Google Patents

Method for screening iron core based on loss value simulation test

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CN114154336B
CN114154336B CN202111484974.8A CN202111484974A CN114154336B CN 114154336 B CN114154336 B CN 114154336B CN 202111484974 A CN202111484974 A CN 202111484974A CN 114154336 B CN114154336 B CN 114154336B
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CN114154336A (en
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肖育泳
张继超
张志臻
黄旭文
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Foshan Zhongyan Amorphous Technology Co ltd
Foshan Zhongyan Magnetoelectric Technology Co ltd
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Foshan Zhongyan Magnetoelectric Technology Co ltd
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Abstract

本发明公开了一种基于损耗值模拟测试筛选铁芯的方法，其步骤，S1、将单匝闭环的铁芯放置在测试架上，铁芯固有的饱和磁通密度为Bs，设定铁芯的工作磁通密度为Bm，且Bm≤Bs；S2、将数据采集装置的两个测试夹分别经铁芯两端穿入铁芯内并相互夹紧，使夹紧后的测试夹保留在铁芯内；通过数据采集装置采集铁芯的串联电感Ls和品质因数Q，并记录为字符串信息；S3、使数据处理装置与数据采集装置通信连接，将步骤S2的字符串信息写入、读取，将字符串信息转化为数值信息；S4、数据处理装置读取步骤S3的数值信息，基于计算公式A对铁芯进行在工作磁通密度Bm值下的损耗值P；S5、将步骤S4计算所得的损耗值P在损耗值P范围内的铁芯筛选出来。

The invention discloses a method for screening an iron core based on a loss value simulation test, and the method comprises the following steps: S1, placing an iron core of a single-turn closed loop on a test frame, wherein the inherent saturation magnetic flux density of the iron core is Bs , and the working magnetic flux density of the iron core is set to Bm , and Bm≤Bs ; S2, respectively inserting two test clips of a data acquisition device into the iron core through two ends of the iron core and clamping them to each other, so that the clamped test clips are retained in the iron core; collecting the series inductance Ls and the quality factor Q of the iron core through the data acquisition device, and recording them as character string information; S3, making a data processing device communicate with the data acquisition device, writing and reading the character string information of step S2, and converting the character string information into numerical information; S4, the data processing device reads the numerical information of step S3, and performs a loss value P of the iron core under the working magnetic flux density Bm value based on a calculation formula A; and S5, screening out the iron cores whose loss value P calculated in step S4 is within the range of the loss value P.

Description

Method for screening iron core based on loss value simulation test
Technical Field
The invention relates to the technical field of iron core screening methods, in particular to a method for screening iron cores based on loss value simulation test.
Background
The iron core is used as a core part of the magnetic device, the loss of the iron core directly affects the efficiency and the temperature rise of the device, the loss of the iron core directly affects the design of the device, and particularly, the iron core loss of a transformer must be regulated within a specific range during the design, otherwise, the conversion efficiency of the transformer is directly affected. In practical application, in order to better realize the product performance, the iron core meeting the requirement needs to be screened out, so that the loss value of the iron core in a certain working magnetic flux density state needs to be simulated first, and then the iron core meeting the requirement of the loss value range needs to be selected out.
The existing core loss simulation test scheme is complex, a loss value can be obtained only by testing multiple groups of data such as inductance, impedance, frequency and the like, calculation is relatively complex, and test speed is low.
On the other hand, the current simulation test schemes for core loss in the market have few instruments, and most of the instruments adopt a method of measuring and calculating, because the instruments capable of measuring the core loss value are expensive and cannot meet the rapid test of production. For example, the MATS-2010SA soft magnetic direct current measuring device manufactured by Hunan Union has the market price of 15 ten thousand Yuan people's bank notes, the Tai Japan rock-kaki BH analyzer and SY-8219 and SY-8218 soft magnetic alternating current characteristic test, which are prepared according to the frequency and the power, different about 50-200 ten thousand RMB, the loss speed of MATS-2010SA measurement of Hunan Union is about 20 seconds/time, and the loss speed of SY-8219 and SY-8218BH measurement of Japan rock-kaki is about 90 seconds/time.
The LCR tester is an instrument capable of measuring inductance, capacitance and impedance, but when the LCR tester is applied to the simulation test of the core loss value, the problem that the measured value of the instrument is acquired by a computer for program operation needs to be solved. This is because the manufacturer of the instrument and equipment does not provide the acquisition program code, but the instrument provides the data interface, so that the computer is acquired through the data interface by using the test value of the instrument in order to perform the secondary development operation, and therefore, the acquisition program needs to be specially written.
Disclosure of Invention
The invention aims to provide a method for screening iron cores based on loss value simulation test, which aims to overcome the defects of the prior art, provides a scheme for rapidly screening iron cores meeting requirements, solves the problems of complex screening steps, low data acquisition speed, high data acquisition cost and data acquisition in secondary development operation in the prior art, avoids various defects of manually inputting data, and simultaneously does not need to purchase new equipment, and saves cost.
In order to achieve the above purpose, the invention adopts the following technical scheme:
A method for screening iron cores based on loss value simulation test comprises the following steps,
S1, placing a single-turn closed-loop iron core on a test frame, wherein the inherent saturation magnetic flux density of the iron core is B s, and the working magnetic flux density of the iron core is set to be B m and B m≤Bs;
S2, two test clamps of the data acquisition device penetrate into the iron core through two ends of the iron core respectively and are clamped mutually, so that the clamped test clamps are reserved in the iron core;
S3, enabling the data processing device to be in communication connection with the data acquisition device, writing the character string information in the step S2 into the data processing device, reading the character string information through the data processing device, and converting the character string information into numerical value information;
S4, the data processing device reads the numerical information in the step S3, and performs a loss value P on the iron core under the value of the working magnetic flux density B m based on a calculation formula A, wherein the calculation formula A is as follows:
Wherein B m is the working magnetic flux density, ls is the inductance of the iron core, le is the equivalent length of the magnetic circuit of the iron core, ae is the equivalent cross-sectional area of the iron core, Q is the quality factor of the iron core, pi is the circumference rate, ρ is the density of the iron core, and f is the frequency of the set data acquisition device.
And S5, screening out the iron cores with the loss values P within the loss value P range, which are calculated in the step S4, based on the set loss value P range.
According to the invention, character string information of the data acquisition device is converted into numerical value information through the data processing device, secondary development operation is carried out on the numerical value information, meanwhile, by combining a calculation formula, only the numerical value information of the inductance Ls and the numerical value information of the quality factor Q are required to be obtained, and the loss value P of the iron core in the state that the working magnetic flux density is B m can be obtained, so that the iron core meeting the requirements can be rapidly screened out, and the loss value P of the screened iron core is in a specified range.
Further, a data acquisition program for converting character string information into numerical value information is set in the data processing device.
Further, step S3 includes the step of setting the communication port, the baud rate, and the bit rate of the working interface of the data acquisition program to be consistent with the setting of the communication port, the baud rate, and the bit rate of the data acquisition device, so that the data processing device is in communication connection with the data acquisition device.
Further, step S3 further includes:
s31, after writing the character string information of the data acquisition device into a data acquisition program, the data acquisition program reads the character string information;
s32, splitting the character string information into two sections of character string information by the data acquisition program, wherein a separator is arranged between the two sections of character string information for separation, the character string information before the separator is the character string information of the series inductance Ls, and the character string information after the separator is the character string information of the quality factor Q;
S33, converting the character string information of the series inductance Ls in the step S32 into numerical information of the series inductance Ls, and converting the character string information of the quality factor Q in the step S32 into numerical information of the quality factor Q;
and S34, displaying the numerical value information obtained in the step S33 through a display control.
Further, the step S31 is further configured to set a total amount of the character string information, and stop reading after reading the total amount of the character string information.
Further, in the step S32, a first string length X 1 and a second string length X 2 are set, the lengths of the string information are separated into two lengths of string information by the separator, the length of the string information before the separator is the first string length X 1, the length of the string information after the separator is the second string length X 2, the string information of the first string length X 1 before the separator is read first, recorded as the string information of the series inductance Ls, and the string information of the second string length X 2 after the separator is read, recorded as the string information of the quality factor Q.
Further, the checking method of the first string length X 1 and the second string length X 2 includes setting a first preset string length X 10 and a second preset string length X 20, splitting the string information through the first preset string length X 10 and the second preset string length X 20 to obtain two pieces of string information, setting the string information before the separator as the first string information, setting the string information after the separator as the second string information, converting the first string information and the second string information into the first numerical value information and the second numerical value information respectively, judging whether the first numerical value information and the second numerical value information are equal to the numerical value of the series inductance Ls and the numerical value of the quality factor Q displayed on the data acquisition device, when judging yes, the first preset string length X 10 is the first string length X 1, the second preset string length X 20 is the second string length X 2, when judging whether the first preset string length X 2 is the first preset length is the second string length, and when judging that the first preset length X 10 is the second string length is the second length, and checking whether the first string length is the second string length is the first length and the second length is the first string length and the second length is the second length.
Further, in step S33, the character string information with the length of the character string information being the first character string length X 1 is converted into numerical information to obtain numerical information of the series inductance Ls, and the character string information with the length of the character string information being the second character string length X 2 is converted into numerical information to obtain numerical information of the quality factor Q.
Further, in order to reduce the test cost of the invention, the data acquisition device is an LCR tester. The LCR digital bridge comprises data interfaces such as RS232, RS485, GPIB interface, USB interface and the like.
The invention has the beneficial effects that:
1. According to the invention, character string information of the data acquisition device is converted into numerical value information through the data processing device, secondary development operation is carried out on the numerical value information, meanwhile, the loss value P of the iron core in the state of working magnetic flux density B m can be obtained only by obtaining numerical value information of the inductance Ls and numerical value information of the quality factor Q through combining a calculation formula, so that the iron core meeting the requirement can be rapidly screened out, and the loss value P of the screened iron core is in a specified range.
2. The test value of the data acquisition device is acquired to the computer through the data interface through the data acquisition program to carry out secondary development operation, so that the problem that the measured value of the data acquisition device is acquired to the computer to be used for program operation is solved, and the data acquisition program runs stably and fast.
3. According to the invention, the LCR tester is used as a data acquisition device, so that the test cost is reduced.
Drawings
FIG. 1 is a diagram of a program interface according to an embodiment of the invention;
FIG. 2 is a diagram of a second program interface according to an embodiment of the invention;
FIG. 3 is a diagram illustrating a program interface according to an embodiment of the present invention.
Detailed Description
In order to make the technical scheme, the purpose and the advantages of the invention more clear, the invention is further explained below with reference to the drawings and the embodiments.
The method for screening the iron core based on the loss value simulation test comprises the following steps:
S1, placing a single-turn closed-loop iron core on a test frame, wherein the inherent saturation magnetic flux density of the iron core is B s, and the working magnetic flux density of the iron core is set to be B m and B m≤Bs;
S2, two test clamps of the data acquisition device penetrate into the iron core through two ends of the iron core respectively and are clamped mutually, so that the clamped test clamps are reserved in the iron core;
In this embodiment, the data acquisition device is an LCR tester, specifically a TH2816A bridge, the communication port is COM3, the baud rate is set to 9600, and the data bit is 8. At this time, after correcting and debugging the TH2816A bridge, the test item is set as an Ls-Q test page, and the TH2816A bridge is cleared for open circuit and short circuit.
And S3, enabling the data processing device to be in communication connection with the data acquisition device. Specifically, a data acquisition program for converting character string information into numerical value information is set in the data processing apparatus. Before the test starts, a power supply of a TH2816A bridge is started, a computer is started, a working interface of a data acquisition program set in a data processing device is opened, as shown in fig. 1, a data acquisition page is selected, a communication port is selected to be COM3, the baud rate is set to be 9600, the data bit is set to be 8, the technical parameters are consistent with the technical parameter setting of an LCR tester, the data acquisition device and the data processing device are communicated in series by utilizing a transmission line, and communication between the serial port of the data acquisition device and the data processing device is realized.
And then writing the character string information in the step S2 into a data processing device, and reading the character string information by the data processing device to convert the character string information into numerical value information, wherein the method specifically comprises the following steps of:
S31, after the character string information of the data acquisition device is written into a data acquisition program, the data acquisition program reads the character string information. In order to prevent the repeated writing of the character string information by the data acquisition program, the step is also provided with the total amount of the character string information, and the reading is stopped after the total amount of the character string information is read, so that the running speed can be further improved, and the dead halt can be avoided.
S32, the data acquisition program splits the character string information into two sections of character string information, a separator is arranged between the two sections of character string information for separation, the character string information before the separator is the character string information of the series inductance Ls, and the character string information after the separator is the character string information of the quality factor Q. Specifically, a first string length X 1 and a second string length X 2 are set, the lengths of the string information are separated into two lengths of string information by the separator, the length of the string information before the separator is the first string length X 1, the length of the string information after the separator is the second string length X 2, the string information of the first string length X 1 before the separator is read first, the string information of the series inductance Ls is recorded, the string information of the second string length X 2 after the separator is read, and the string information of the quality factor Q is recorded.
Before testing, the first character string length X 1 and the second character string length X 2 are required to be checked, the checking method comprises the steps of firstly setting a first preset character string length X 10 and a second preset character string length X 20, splitting the character string information through the first preset character string length X 10 and the second preset character string length X 20 to obtain two pieces of character string information, setting the character string information before a separator as the first character string information, setting the character string information after the separator as the second character string information, converting the first character string information and the second character string information into a first numerical value information and a second numerical value information respectively, judging whether the first numerical value information and the second numerical value information are equal to the numerical value of the series inductance Ls and the quality factor Q displayed on the data acquisition device, when judging that the first preset character string length X 10 and the second preset character string length X 20 are the first character string length X 1, the second preset character string length X 20 are the second character string information, when judging that the first preset character string length X 2 is the first preset character string length is the second character string length, and when the first preset character string length X 10 is the first preset character string length is the second length, and checking is carried out again.
S33, converting the character string information of the series inductor Ls in the step S32 into the numerical value information of the series inductor Ls, converting the character string information of the quality factor Q in the step c into the numerical value information of the quality factor Q, specifically converting the character string information with the length of the character string information being the first character string length X 1 into the numerical value information to obtain the numerical value information of the series inductor Ls, and converting the character string information with the length of the character string information being the second character string length X 2 into the numerical value information to obtain the numerical value information of the quality factor Q.
And S34, displaying the numerical value information obtained in the step S33 through a display control.
Step S3, as shown in FIG. 2, selecting a page as "parameter input" in a program operation interface of the data processing device, inputting an equivalent sectional area Ae of an iron core, an equivalent length Le of a magnetic circuit of the iron core and a density ρ of the iron core, as shown in FIG. 3, selecting a page as "loss test" in the program operation interface, setting a value of an operating magnetic flux density B m and a frequency f, wherein the frequency f must be consistent with the frequency of a TH2816A bridge, and clicking "start test" to obtain numerical information of a series inductance Ls and numerical information of a quality factor Q.
S4, the data processing device reads the numerical information in the step S3, carries out loss value P on the iron core under the value of working magnetic flux density B m based on a calculation formula A, wherein the calculation formula A is as follows,
Wherein B m is the working magnetic flux density, ls is the inductance of the iron core, le is the equivalent length of the magnetic circuit of the iron core, ae is the equivalent cross-sectional area of the iron core, Q is the quality factor of the iron core, pi is the circumference rate, ρ is the density of the iron core, and f is the frequency of the set data acquisition device.
The loss value of the iron core under the working magnetic flux density B m is obtained through the operation of the calculation formula, and the loss test page is displayed in the working interface, so that the loss value P of the iron core under the working magnetic flux density B m can be read, and the test is completed and the test is stopped.
And S5, screening out the iron cores with the loss values P within the loss value P range, which are calculated in the step S4, based on the set loss value P range.
According to the test method, the iron core with the loss value P range under the set working magnetic flux density B m and the frequency f as shown in the following table is selected according to the production process or the product design requirement:
Project Number 1 Number 1 Number 1
Setting the working magnetic flux density B m (T) 0.5T 0.4T 0.3T
Frequency f (KHz) 20KHz 30KHz 40KHz
Loss value P (W/Kg) P<30 P<40 P<35
Sample 1, sample 2, sample 3, sample 4 and sample 5 are selected for screening, wherein the sample 1, sample 2, sample 3, sample 4 and sample 5 are single-turn annular iron cores, the outline dimensions are 28cm x 19cm x 10cm, and the equivalent sectional area Ae, the equivalent magnetic circuit length Le and the density ρ of the iron cores of each sample are shown in the following table:
Group of Equivalent length of magnetic circuit Le (cm) Equivalent cross-sectional area Ae (cm 2) Density ρ (g/cm 3) of iron core
Sample 1 7.38 0.36 7.3
Sample 2 7.38 0.36 7.3
Sample 3 7.38 0.36 7.3
Sample 4 7.38 0.36 7.3
Sample 5 7.38 0.36 7.3
The above samples 1,2,3, 4 and 5 were subjected to loss value simulation test according to the calculation formula a at different frequencies and different working magnetic flux densities, and the results are shown in the following table:
The above results indicate that each sample of the screening method of the present embodiment takes only 0.4 seconds to obtain the numerical information of the loss value of the iron core at the set working magnetic flux density, and the iron core falling within the set loss value range is screened out according to the numerical information of the obtained loss value. According to the invention, the character string information of the data acquisition device is converted into the numerical value information through the data processing device, secondary development operation is carried out on the numerical value information, meanwhile, the numerical value information of the loss value of the iron core under the set working magnetic flux density can be obtained only by obtaining the numerical value information of the inductance Ls and the numerical value information of the quality factor Q through combining a calculation formula, and therefore the iron core meeting the requirements can be rapidly screened.
The foregoing is merely a preferred embodiment of the present invention, and modifications of the embodiments described above can be made by those skilled in the art without departing from the implementation principles of the present invention, and the corresponding modifications should also be considered as the protection scope of the present invention.

Claims (9)

1.一种基于损耗值模拟测试筛选铁芯的方法，其特征在于：包括如下步骤，1. A method for screening iron cores based on loss value simulation test, characterized in that it comprises the following steps: S1、将单匝闭环的铁芯放置在测试架上，所述铁芯固有的饱和磁通密度为Bs，设定所述铁芯的工作磁通密度为Bm，且Bm≤Bs；S1. Place a single-turn closed-loop iron core on a test stand, the inherent saturation magnetic flux density of the iron core is B s , and the working magnetic flux density of the iron core is set to B m , and B m ≤ B s ; S2、将数据采集装置的两个测试夹分别经铁芯两端穿入铁芯内并相互夹紧，使夹紧后的测试夹保留在铁芯内；通过数据采集装置采集所述铁芯的串联电感Ls和品质因数Q，并记录为字符串信息；S2, inserting two test clips of the data acquisition device into the iron core through the two ends of the iron core respectively and clamping them together, so that the clamped test clips remain in the iron core; collecting the series inductance Ls and quality factor Q of the iron core through the data acquisition device, and recording them as character string information; S3、使所述数据处理装置与数据采集装置通信连接，将步骤S2的字符串信息写入至数据处理装置，经数据处理装置读取，将字符串信息转化为数值信息；S3, connecting the data processing device to the data acquisition device, writing the character string information of step S2 to the data processing device, and converting the character string information into numerical information after the data processing device reads the character string information; S4、所述数据处理装置读取步骤S3的数值信息，基于计算公式A对铁芯进行在工作磁通密度Bm值下的损耗值P，其计算公式A如下：S4, the data processing device reads the numerical information of step S3, and calculates the loss value P of the core under the working magnetic flux density B m value based on calculation formula A, and the calculation formula A is as follows: 式中，Bm为工作磁通密度，Ls是铁芯的电感，Le是铁芯磁路的等效长度，Ae是铁芯的等效截面积，Q是铁芯的品质因数，π是圆周率，ρ为铁芯的密度，f为设定数据采集装置频率；Wherein, Bm is the working magnetic flux density, Ls is the inductance of the iron core, Le is the equivalent length of the iron core magnetic circuit, Ae is the equivalent cross-sectional area of the iron core, Q is the quality factor of the iron core, π is the circumference, ρ is the density of the iron core, and f is the set frequency of the data acquisition device; S5、基于设定的损耗值P范围，将步骤S4计算所得的损耗值P在所述损耗值P范围内的铁芯筛选出来。S5. Based on the set loss value P range, the iron cores whose loss values P calculated in step S4 are within the loss value P range are screened out. 2.如权利要求1所述的基于损耗值模拟测试筛选铁芯的方法，其特征在于，所述数据处理装置内设定有用于将字符串信息转化为数值信息的数据采集程序。2. The method for screening iron cores based on loss value simulation test as described in claim 1 is characterized in that a data acquisition program for converting string information into numerical information is set in the data processing device. 3.如权利要求2所述的基于损耗值模拟测试筛选铁芯的方法，步骤S3包括如下步骤，所述数据采集程序工作界面的通讯端口、波特率、比特率的设定与所述数据采集装置的通讯端口、波特率、比特率的设定一致，使所述数据处理装置与数据采集装置通信连接。3. The method for screening iron cores based on loss value simulation test as described in claim 2, step S3 includes the following steps: the communication port, baud rate, and bit rate settings of the data acquisition program working interface are consistent with the communication port, baud rate, and bit rate settings of the data acquisition device, so that the data processing device is communicatively connected with the data acquisition device. 4.如权利要求3所述的基于损耗值模拟测试筛选铁芯的方法，其特征在于，步骤S3还包括：4. The method for screening iron cores based on loss value simulation test according to claim 3, characterized in that step S3 further comprises: S31、将数据采集装置的字符串信息写入数据采集程序后，所述数据采集程序对所述字符串信息进行读取；S31, after writing the character string information of the data acquisition device into the data acquisition program, the data acquisition program reads the character string information; S32、所述数据采集程序将该字符串信息进行拆分成两段字符串信息，两段字符串信息之间设置有分隔符进行分隔，所述分隔符前的字符串信息为串联电感Ls的字符串信息，所述分隔符后的字符串信息为品质因数Q的字符串信息；S32, the data acquisition program splits the string information into two segments of string information, a separator is set between the two segments of string information for separation, the string information before the separator is the string information of the series inductance Ls, and the string information after the separator is the string information of the quality factor Q; S33、将步骤S32中串联电感Ls的字符串信息通过转化为串联电感Ls的数值信息；将步骤S32中品质因数Q的字符串信息通过转化为品质因数Q的数值信息；S33, converting the string information of the series inductance Ls in step S32 into the numerical information of the series inductance Ls; converting the string information of the quality factor Q in step S32 into the numerical information of the quality factor Q; S34、将步骤S33所得的数值信息通过显视控件显示。S34, displaying the numerical information obtained in step S33 through a display control. 5.如权利要求4所述的基于损耗值模拟测试筛选铁芯的方法，其特征在于，所述步骤S31还设定有字符串信息总量，读取到所述字符串信息总量后就停止读取。5. The method for screening iron cores based on loss value simulation test as described in claim 4 is characterized in that the step S31 also sets a total amount of string information, and the reading is stopped after the total amount of string information is read. 6.如权利要求4所述的基于损耗值模拟测试筛选铁芯的方法，其特征在于，所述步骤S32中，设定有第一字符串长度X1和第二字符串长度X2，所述字符串信息的长度通过所述分隔符分隔成两个长度的字符串信息，所述分隔符前的字符串信息的长度为所述第一字符串长度X1，所述分隔符后的字符串信息的长度为所述第二字符串长度X2，先读取所述分隔符前的所述第一字符串长度X1的字符串信息，将其记录为所述串联电感Ls的字符串信息，再读取所述分隔符后的所述第二字符串长度X2的字符串信息，将其记录为所述品质因数Q的字符串信息。6. The method for screening iron cores based on loss value simulation test according to claim 4, characterized in that, in the step S32, a first character string length X1 and a second character string length X2 are set, the length of the character string information is separated into character string information of two lengths by the delimiter, the length of the character string information before the delimiter is the first character string length X1 , and the length of the character string information after the delimiter is the second character string length X2 , the character string information of the first character string length X1 before the delimiter is first read and recorded as the character string information of the series inductance Ls, and then the character string information of the second character string length X2 after the delimiter is read and recorded as the character string information of the quality factor Q. 7.如权利要求6所述的基于损耗值模拟测试筛选铁芯的方法，其特征在于，还包括所述第一字符串长度X1和第二字符串长度X2的校验方法，所述校验方法包括：先设定第一预设字符串长度X10和第二预设字符串长度X20，通过第一预设字符串长度X10和第二预设字符串长度X20对所述字符串信息进行拆分获得两段字符串信息，将分隔符前的字符串信息设定为第一字符串信息，将分隔符后的字符串信息设定为第二字符串信息，并将第一字符串信息和第二字符串信息分别转化为第一数值信息和第二数值信息，再来判断第一数值信息和第二数值信息是否与数据采集装置上显示的串联电感Ls的数值和品质因数Q的数值相等，当判断为是时，则第一预设字符串长度X10即为第一字符串长度X1、第二预设字符串长度X20即为第二字符串长度X2，当判断为否时，则修改第一预设字符串长度X10的长度值和第二预设字符串长度X20的长度值，再次进行检验。7. The method for screening iron cores based on loss value simulation test according to claim 6, characterized in that it also includes a verification method for the first character string length X1 and the second character string length X2 , the verification method comprising: first setting a first preset character string length X10 and a second preset character string length X20 , splitting the character string information by the first preset character string length X10 and the second preset character string length X20 to obtain two segments of character string information, setting the character string information before the separator as the first character string information, setting the character string information after the separator as the second character string information, and converting the first character string information and the second character string information into first numerical value information and second numerical value information respectively, and then judging whether the first numerical value information and the second numerical value information are equal to the numerical value of the series inductance Ls and the numerical value of the quality factor Q displayed on the data acquisition device, when the judgment is yes, the first preset character string length X10 is the first character string length X1 , and the second preset character string length X20 is the second character string length X2 , when the judgment is no, modifying the length value of the first preset character string length X10 and the length value of the second preset character string length X20 , and performing verification again. 8.如权利要求6所述的基于损耗值模拟测试筛选铁芯的方法，其特征在于，步骤S33中，将所述字符串信息的长度为所述第一字符串长度X1的字符串信息转化为数值信息，即得到串联电感Ls的数值信息；将所述字符串信息的长度为所述第二字符串长度X2的字符串信息转化为数值信息，即得到品质因数Q的数值信息。8. The method for screening iron cores based on loss value simulation test according to claim 6, characterized in that, in step S33, the character string information whose length is the first character string length x 1 is converted into numerical information, that is, the numerical information of the series inductance Ls is obtained; the character string information whose length is the second character string length x 2 is converted into numerical information, that is, the numerical information of the quality factor Q is obtained. 9.如权利要求1所述的基于损耗值模拟测试筛选铁芯的方法，其特征在于，所述数据采集装置为LCR测试仪。9. The method for screening iron cores based on loss value simulation test as described in claim 1, characterized in that the data acquisition device is an LCR tester.
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