CN215525950U - Magnetic core impedance test system - Google Patents
Magnetic core impedance test system Download PDFInfo
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- CN215525950U CN215525950U CN202120427321.5U CN202120427321U CN215525950U CN 215525950 U CN215525950 U CN 215525950U CN 202120427321 U CN202120427321 U CN 202120427321U CN 215525950 U CN215525950 U CN 215525950U
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Abstract
The utility model discloses a magnetic core impedance test system, which comprises a dynamic signal generating part, wherein the dynamic signal generating part comprises an arbitrary wave signal generator, the arbitrary wave signal generator is electrically connected with a signal amplifier, the signal amplifier is electrically connected with an impedance stabilizer, and the impedance stabilizer is provided with a signal transmitting part for transmitting current signals to the outside in an extending way; by applying the magnetic core impedance test system, the dynamic application process simulation of the tested magnetic core can be effectively carried out, and the tested magnetic core has corresponding impedance characteristics, so that the direction is indicated for the research and development and application of products.
Description
Technical Field
The utility model relates to the technical field of magnetic core impedance testing, in particular to a magnetic core impedance testing system.
Background
The conventional impedance analyzer can only measure impedance under static state or low current superposition, and cannot measure the impedance characteristic of a magnetic core under dynamic state. In practical working process applications, if the magnetic core or the magnetic core is susceptible to external influences and impedance changes occur, the quality of the applied device will be affected if the magnetic core with unsatisfactory impedance characteristics is used for working applications.
SUMMERY OF THE UTILITY MODEL
It is an object of the present invention to provide a core impedance testing system that overcomes the deficiencies of the prior art.
Magnetic core impedance test system, it includes dynamic signal generation portion, dynamic signal generation portion includes arbitrary ripples signal generator, arbitrary ripples signal generator electric connection has signal amplifier, signal amplifier electric connection has the impedance stabilizer, the impedance stabilizer extends and is provided with the signal transmission portion that is used for the external transmission of current signal.
Furthermore, a generator signal output end of the arbitrary wave signal generator is electrically connected with a first amplified signal input end of a signal amplifier, a first amplified signal output end of the signal amplifier is electrically connected with a first impedance signal input end of the impedance stabilizer, a signal transmission connecting wire is arranged at the first impedance signal output end of the impedance stabilizer in an extending manner to serve as the signal transmission part, the signal transmission connecting wire is wound on the inner ring side of the tested magnetic core and is electrically connected to a second impedance signal input end of the impedance stabilizer, the second impedance signal output end of the impedance stabilizer is electrically connected to a second amplified signal input end of the signal amplifier, and the second amplified signal output end of the signal amplifier is electrically connected to the generator signal input end of the arbitrary wave signal generator; the generator signal output end, the first amplification signal input end, the first amplification signal output end, the first impedance signal input end, the first impedance signal output end, the second impedance signal input end, the second impedance signal output end, the second amplification signal input end, the second amplification signal output end and the generator signal input end are sequentially and electrically communicated to form generation connection setting of a current signal.
Further, the dynamic signal generating part is provided with at least two groups.
Further, the signal amplifier is a current power amplifier.
Further, the impedance analyzer is further included, and the impedance analyzer is provided with a signal receiving part for impedance signal receiving in an extending mode.
Further, the impedance analyzer is a vector network analyzer.
Furthermore, a signal receiving connection wire is extended from the analysis signal output end of the impedance analyzer to serve as the signal receiving portion, so that the signal receiving connection wire is wound around the inner ring side of the tested magnetic core and is electrically connected to the analysis signal input end of the impedance analyzer, thereby forming a receiving connection arrangement of the impedance signal.
By applying the magnetic core impedance test system, the dynamic application process simulation of the tested magnetic core can be effectively carried out, and the tested magnetic core has corresponding impedance characteristics, so that the direction is indicated for the research and development and application of products.
Drawings
FIG. 1 is a schematic diagram of an exemplary embodiment of a magnetic core impedance testing system;
FIG. 2 is an illustration of an application of signal waveforms generated by an arbitrary-wave signal generator according to an embodiment of the present invention;
FIG. 3 is an illustration of an application of signal waveforms generated by another arbitrary-wave signal generator in an embodiment of the present invention;
FIG. 4 is a circuit diagram of an impedance stabilizer according to an embodiment of the present invention;
FIG. 5 is a graph of 100 KHZ-200 MHZ impedance curves obtained from the test of the magnetic core under test in the embodiment of the present invention;
FIG. 6 is a graph of 500 KHZ-108 MHZ impedance measured by the magnetic core under test in the embodiment of the present invention;
FIG. 7 is a graph of the impedance of a prior art test of a magnetic core under test.
Description of reference numerals:
a dynamic signal generating part 100,
An arbitrary wave signal generator 1, a generator signal output end 11, a generator signal input end 12,
A signal amplifier 2, a first amplified signal input terminal 21, a first amplified signal output terminal 22, a second amplified signal input terminal 23, a second amplified signal output terminal 24,
An impedance stabilizer 3, a first impedance signal input terminal 31, a first impedance signal output terminal 32, a second impedance signal input terminal 33, a second impedance signal output terminal 34,
A signal transmission connecting line 4,
A measured magnetic core 5,
An impedance analyzer 6, an analysis signal output terminal 61, an analysis signal input terminal 62,
The signal receiving connecting line 7.
Detailed Description
In order to make the technical solution, the purpose and the advantages of the present invention more apparent, the present invention will be further explained with reference to the accompanying drawings and embodiments.
The utility model provides a magnetic core impedance test system for dynamically simulating impedance detection of a magnetic core.
As shown in fig. 1, the magnetic core impedance testing system of the present embodiment is applied to an impedance test of a tested magnetic core 5 arranged in a ring shape, and the magnetic core impedance testing system includes a dynamic signal generating portion 100, where the dynamic signal generating portion 100 includes an arbitrary wave signal generator 1, a signal amplifier 2 and an impedance stabilizer 3.
In the dynamic signal generating unit 100, the generator signal output terminal 11 of the arbitrary wave signal generator 1 is electrically connected to the first amplified signal input terminal 21 of the signal amplifier 2, the first amplified signal output terminal 22 of the signal amplifier 2 is electrically connected to the first impedance signal input terminal 31 of the impedance stabilizer 3, the first impedance signal output terminal 32 of the impedance stabilizer 3 is extended with a signal transmission connection line 4 as a signal transmission unit for transmitting current signals to the outside, the signal transmission connection line 4 is wound around the inner ring side of the tested magnetic core 5 and then electrically connected to the second impedance signal input terminal 33 of the impedance stabilizer 3, the second impedance signal output terminal 34 of the impedance stabilizer is electrically connected to the second amplified signal input terminal 23 of the signal amplifier 2, and the second amplified signal output terminal 24 of the signal amplifier 2 is electrically connected to the generator signal input terminal 21 of the arbitrary wave signal generator 1 12.
The generator signal output end 11, the first amplified signal input end 21, the first amplified signal output end 22, the first impedance signal input end 31, the first impedance signal output end 32, the second impedance signal input end 33, the second impedance signal output end 34, the second amplified signal input end 23, the second amplified signal output end 24 and the generator signal input end 12 are sequentially and electrically connected, so that a current signal generating connection device is formed.
The arbitrary wave signal generator 1 performs corresponding signal waveform simulation through editing input by a function, so as to simulate different current environment conditions borne by the tested magnetic core 5 in the actual use process of a product applied to the tested magnetic core.
The signal amplifier 2 is applied as a current power amplifier to perform signal amplification processing on the analog current signal on the premise of ensuring that the waveform of the acquired signal is not changed.
The impedance stabilizer 3 is provided with a stable impedance to keep the impedance of the current signal generating line stable, ensure that the magnetic core 5 to be tested is not influenced by the internal resistance of the signal amplifier 2, and avoid short circuit of the magnetic core 5 to be tested caused by too small input impedance.
By providing the dynamic signal generating unit 100, dynamic simulation of the current environment condition of the magnetic core 5 to be measured can be effectively performed. Therefore, the impedance characteristic analysis of the tested magnetic core 5 can be effectively realized by externally connecting the corresponding impedance analyzer 6.
The impedance analyzer 6 in this embodiment can be selectively applied as a vector network analyzer to perform actual impedance characteristic analysis of the magnetic core 5 to be measured; specifically, a signal receiving connection line 7 is extended from the analysis signal output end 61 of the vector network analyzer to serve as a signal receiving portion for receiving an impedance signal, and the signal receiving connection line 7 is wound around the inner ring side of the magnetic core 5 to be measured and then electrically connected to the analysis signal input end 62 of the vector network analyzer, so as to form a receiving connection arrangement for the impedance signal.
In a preferred embodiment, as shown in fig. 2 and 3, in the present embodiment, the arbitrary wave signal generators 1 are arranged in at least two groups, one of the arbitrary wave signal generators 1 generates a dc waveform with a frequency of less than 50KHZ (the vertical axis is current, and the horizontal axis is time), and the other arbitrary wave signal generator 1 generates a sinusoidal ac waveform with a frequency of less than 50KHZ (the vertical axis is current, and the horizontal axis is time) to generate different arbitrary wave signals, and the arbitrary wave signals are used as application simulation, so that the current application environment of the magnetic core 5 to be measured can be simulated more truly.
The arbitrary wave signal generator 1 is applied as a voltage output, which is usually set to an output value of 1-10 VPP.
Generally, the loop impedance of the output port of the current power amplifier applied in the prior art is very low (less than 1000 Ω, in the frequency band range of 100KHZ to 200 MHZ), so that the impedance stabilizer 3 needs to be applied to increase the impedance of the current signal generating line; as shown in fig. 4, the designed circuit of the impedance stabilizer 3 is that current enters from a first impedance signal input terminal 31(input), passes through a first-stage common mode inductor CMC and a first-stage differential mode inductor to a first impedance signal output terminal 32 (load terminal), returns through a second impedance signal input terminal 33 (load'), and returns through the first-stage common mode inductor CMC and the first-stage differential mode inductor to a second impedance signal output terminal 34 (Back).
The impedance of the design of the common mode inductor and the differential mode inductor is more than 1000 ohms at 100 KHZ. The impedance of the measured magnetic core 5 is generally below 20 ohms at a frequency of 100 KHZ. Multiple experimental data prove that the impedance a provided by the impedance stabilizer 3 is better than the impedance b of the tested magnetic core 5 in a setting that a/b is more than 50.
The impedance curve of 100 KHZ-200 MHZ tested for the tested magnetic core 5 in this embodiment is shown in FIG. 5.
The impedance curve of 500 KHZ-108 MHZ tested for the tested magnetic core 5 in the application of the embodiment is shown in FIG. 6.
In contrast, if direct impedance analysis is performed only in a conventional manner without adjusting the input setting with a dynamic signal based on the dynamic signal generating section 100 of the present embodiment, and the result is that the impedance is almost zero as shown in fig. 7, it indicates that the magnetic core 5 under test has been short-circuited.
In summary, the present invention provides a magnetic core impedance testing system, which relates to a magnetic core impedance characteristic analysis method; the steps of the magnetic core impedance characteristic analysis method are as follows:
s1, outputting a dynamic analog current signal;
s2, performing signal amplification processing on the output analog current signal;
s3, performing impedance stabilization adjustment processing on the analog current signal obtained by the signal amplification processing;
s4, inputting the analog current signal after impedance stabilization adjustment to the magnetic core 5 to be detected, and detecting the impedance of the magnetic core 5 to be detected by impedance analysis equipment;
and S5, analyzing the impedance characteristic of the magnetic core 5 to be tested according to the impedance detection result detected by the impedance analysis equipment.
The above description is only a preferred embodiment of the present invention, and those skilled in the art may still modify the described embodiment without departing from the implementation principle of the present invention, and the corresponding modifications should also be regarded as the protection scope of the present invention.
Claims (7)
1. Magnetic core impedance test system, its characterized in that, including dynamic signal generation portion, dynamic signal generation portion includes arbitrary ripples signal generator, arbitrary ripples signal generator electric connection has signal amplifier, signal amplifier electric connection has the impedance stabilizer, the impedance stabilizer extends and is provided with the signal transmission portion that is used for the external transmission of current signal.
2. The magnetic core impedance testing system of claim 1, wherein the generator signal output of the arbitrary wave signal generator is electrically connected to the first amplified signal input of the signal amplifier, the first amplification signal output end of the signal amplifier is electrically connected with the first impedance signal input end of the impedance stabilizer, a signal transmission connecting wire is extended from the first impedance signal output end of the impedance stabilizer to serve as the signal transmission part, the signal transmission connecting wire is wound on the inner ring side of the tested magnetic core and is electrically connected to the second impedance signal input end of the impedance stabilizer, the second impedance signal output end of the impedance stabilizer is electrically connected to the second amplification signal input end of the signal amplifier, the second amplified signal output end of the signal amplifier is electrically connected to the generator signal input end of the arbitrary wave signal generator; the generator signal output end, the first amplification signal input end, the first amplification signal output end, the first impedance signal input end, the first impedance signal output end, the second impedance signal input end, the second impedance signal output end, the second amplification signal input end, the second amplification signal output end and the generator signal input end are sequentially and electrically communicated to form generation connection setting of a current signal.
3. Core impedance test system according to claim 1 or 2, wherein the dynamic signal generating sections are provided in at least two groups.
4. The core impedance test system of claim 1 or claim 2, wherein the signal amplifier is a current power amplifier.
5. The core impedance testing system of claim 1 or claim 2, further comprising an impedance analyzer having a signal receiving portion extending therefrom for impedance signal reception.
6. The core impedance testing system of claim 5, wherein the impedance analyzer is a vector network analyzer.
7. The system for testing core impedance of claim 5, wherein a signal receiving connection wire is extended from the analysis signal output terminal of the impedance analyzer to serve as the signal receiving portion, such that the signal receiving connection wire is wound around the inner ring side of the tested core and electrically connected to the analysis signal input terminal of the impedance analyzer, thereby forming a connection for receiving the impedance signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120427321.5U CN215525950U (en) | 2021-02-26 | 2021-02-26 | Magnetic core impedance test system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120427321.5U CN215525950U (en) | 2021-02-26 | 2021-02-26 | Magnetic core impedance test system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215525950U true CN215525950U (en) | 2022-01-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202120427321.5U Active CN215525950U (en) | 2021-02-26 | 2021-02-26 | Magnetic core impedance test system |
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| CN (1) | CN215525950U (en) |
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2021
- 2021-02-26 CN CN202120427321.5U patent/CN215525950U/en active Active
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Address after: No.15, Shunjing Avenue, B District, Lishui and GUI Industrial Park, Nanhai District, Foshan City, Guangdong Province Patentee after: Foshan Zhongyan Magnetoelectric Technology Co.,Ltd. Address before: No.15, Shunjing Avenue, B District, Lishui and GUI Industrial Park, Nanhai District, Foshan City, Guangdong Province Patentee before: FOSHAN ZHONGYAN AMORPHOUS TECHNOLOGY Co.,Ltd. |
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